[shardingsphere] branch master updated: Refactor FormatSQLVisitorFacade (#7887)

[pa...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

panjuan pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/shardingsphere.git


The following commit(s) were added to refs/heads/master by this push:
     new 666c1e2  Refactor FormatSQLVisitorFacade (#7887)
666c1e2 is described below

commit 666c1e2a867682721fc5c5eb1b732c76cbd68e68
Author: Juan Pan(Trista) <pa...@apache.org>
AuthorDate: Thu Oct 22 18:25:46 2020 +0800

    Refactor FormatSQLVisitorFacade (#7887)
---
 .../sql/parser/mysql/MySQLParserConfiguration.java |  8 +--
 .../MySQLSQLVisitorFacade.java}                    | 32 +++-------
 .../visitor/format/MySQLFormatSQLVisitor.java}     | 27 +++-----
 .../format/MySQLFormatSQLVisitorFacade.java        | 68 ++++++++++++++++++++
 .../format/impl/MySQLDALFormatSQLVisitor.java}     | 25 +++-----
 .../format/impl/MySQLDCLFormatSQLVisitor.java}     | 25 +++-----
 .../format/impl/MySQLDDLFormatSQLVisitor.java}     | 25 +++-----
 .../format/impl/MySQLDMLFormatSQLVisitor.java}     | 25 +++-----
 .../format/impl/MySQLRLFormatSQLVisitor.java}      | 25 +++-----
 .../format/impl/MySQLTCLFormatSQLVisitor.java}     | 25 +++-----
 .../parser/oracle/OracleParserConfiguration.java   |  8 +--
 .../oracle/visitor/OracleSQLVisitorFacade.java}    | 46 +++++---------
 .../format/OracleFormatSQLVisitorFacade.java       | 62 ++++++++++++++++++
 .../OracleStatementSQLVisitorFacade.java           |  2 +-
 .../postgresql/PostgreSQLParserConfiguration.java  |  8 +--
 .../visitor/PostgreSQLSQLVisitorFacade.java}       | 46 +++++---------
 .../format/PostgreSQLFormatSQLVisitorFacade.java   | 62 ++++++++++++++++++
 .../PostgreSQLStatementSQLVisitorFacade.java       |  2 +-
 .../sql/parser/sql92/SQL92ParserConfiguration.java |  8 +--
 .../sql92/visitor/SQL92SQLVisitorFacade.java}      | 46 +++++---------
 .../format/SQL92FormatSQLVisitorFacade.java        | 62 ++++++++++++++++++
 .../SQL92StatementSQLVisitorFacade.java            |  2 +-
 .../sqlserver/SQLServerParserConfiguration.java    |  8 +--
 .../visitor/SQLServerSQLVisitorFacade.java}        | 46 +++++---------
 .../format/SQLServerFormatSQLVisitorFacade.java    | 62 ++++++++++++++++++
 .../SQLServerStatementSQLVisitorFacade.java        |  2 +-
 ...mentSQLVisitorRule.java => SQLVisitorRule.java} |  8 +--
 .../FormatSQLVisitorFactory.java}                  | 18 +++---
 .../statement/StatementSQLVisitorFactory.java      | 10 +--
 .../standard/StandardSQLParserEngine.java          |  4 +-
 ...isitorRuleTest.java => SQLVisitorRuleTest.java} |  7 +--
 .../visitor/SQLVisitorFacade.java}                 | 35 +++--------
 .../sql/parser/api/visitor/SQLVisitorType.java}    | 24 ++-----
 .../api/visitor/format/FormatSQLVisitorFacade.java | 73 ++++++++++++++++++++++
 .../visitor/format/impl/DALFormatSQLVisitor.java}  | 24 ++-----
 .../visitor/format/impl/DCLFormatSQLVisitor.java}  | 24 ++-----
 .../visitor/format/impl/DDLFormatSQLVisitor.java}  | 24 ++-----
 .../visitor/format/impl/DMLFormatSQLVisitor.java}  | 24 ++-----
 .../visitor/format/impl/RLFormatSQLVisitor.java}   | 24 ++-----
 .../visitor/format/impl/TCLFormatSQLVisitor.java}  | 24 ++-----
 .../sql/parser/spi/SQLParserConfiguration.java     |  4 +-
 41 files changed, 607 insertions(+), 477 deletions(-)

diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java
index 90f5dc6..f0ab873 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java
@@ -19,10 +19,10 @@ package org.apache.shardingsphere.sql.parser.mysql;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.mysql.lexer.MySQLLexer;
 import org.apache.shardingsphere.sql.parser.mysql.parser.MySQLParser;
-import org.apache.shardingsphere.sql.parser.mysql.visitor.statement.MySQLStatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.MySQLSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 
 /**
@@ -46,7 +46,7 @@ public final class MySQLParserConfiguration implements SQLParserConfiguration {
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return MySQLStatementSQLVisitorFacade.class;
+    public Class<? extends SQLVisitorFacade> getVisitorFacadeClass() {
+        return MySQLSQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/MySQLSQLVisitorFacade.java
similarity index 55%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/MySQLSQLVisitorFacade.java
index 90f5dc6..3a3ac04 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/MySQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/MySQLSQLVisitorFacade.java
@@ -15,38 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.mysql;
+package org.apache.shardingsphere.sql.parser.mysql.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
-import org.apache.shardingsphere.sql.parser.mysql.lexer.MySQLLexer;
-import org.apache.shardingsphere.sql.parser.mysql.parser.MySQLParser;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.mysql.visitor.statement.MySQLStatementSQLVisitorFacade;
-import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 
 /**
- * SQL parser configuration for MySQL.
+ * MySQL SQL visitor facade.
  */
-public final class MySQLParserConfiguration implements SQLParserConfiguration {
+public final class MySQLSQLVisitorFacade implements SQLVisitorFacade {
     
     @Override
-    public String getDatabaseTypeName() {
-        return "MySQL";
-    }
-    
-    @Override
-    public Class<? extends SQLLexer> getLexerClass() {
-        return MySQLLexer.class;
-    }
-    
-    @Override
-    public Class<? extends SQLParser> getParserClass() {
-        return MySQLParser.class;
+    public Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass() {
+        return MySQLStatementSQLVisitorFacade.class;
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return MySQLStatementSQLVisitorFacade.class;
+    public Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass() {
+        return MySQLFormatSQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitor.java
index 6263b3a..9021a9c 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitor.java
@@ -15,24 +15,15 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.apache.shardingsphere.sql.parser.autogen.MySQLStatementBaseVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * MySQL Format SQL visitor.
+ */
+@Getter(AccessLevel.PROTECTED)
+public abstract class MySQLFormatSQLVisitor extends MySQLStatementBaseVisitor<String> {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitorFacade.java
new file mode 100644
index 0000000..732884c
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/MySQLFormatSQLVisitorFacade.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLDALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLDCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLDDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLDMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLRLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl.MySQLTCLFormatSQLVisitor;
+
+/**
+ * Format SQL Visitor facade for MySQL.
+ */
+public final class MySQLFormatSQLVisitorFacade implements FormatSQLVisitorFacade {
+    
+    @Override
+    public Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass() {
+        return MySQLDMLFormatSQLVisitor.class;
+    }
+    
+    @Override
+    public Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass() {
+        return MySQLDDLFormatSQLVisitor.class;
+    }
+    
+    @Override
+    public Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass() {
+        return MySQLTCLFormatSQLVisitor.class;
+    }
+    
+    @Override
+    public Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass() {
+        return MySQLDCLFormatSQLVisitor.class;
+    }
+    
+    @Override
+    public Class<? extends DALFormatSQLVisitor> getDALVisitorClass() {
+        return MySQLDALFormatSQLVisitor.class;
+    }
+    
+    @Override
+    public Class<? extends RLFormatSQLVisitor> getRLVisitorClass() {
+        return MySQLRLFormatSQLVisitor.class;
+    }
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDALFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDALFormatSQLVisitor.java
index 6263b3a..3985947 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDALFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DAL Format SQL visitor for MySQL.
+ */
+public final class MySQLDALFormatSQLVisitor extends MySQLFormatSQLVisitor implements DALFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDCLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDCLFormatSQLVisitor.java
index 6263b3a..253319a 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDCLFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DCL Format SQL visitor for MySQL.
+ */
+public final class MySQLDCLFormatSQLVisitor extends MySQLFormatSQLVisitor implements DCLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDDLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDDLFormatSQLVisitor.java
index 6263b3a..4a84d82 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDDLFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DDL Format SQL visitor for MySQL.
+ */
+public final class MySQLDDLFormatSQLVisitor extends MySQLFormatSQLVisitor implements DDLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDMLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDMLFormatSQLVisitor.java
index 6263b3a..11413fa 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLDMLFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DML Format SQL visitor for MySQL.
+ */
+public final class MySQLDMLFormatSQLVisitor extends MySQLFormatSQLVisitor implements DMLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLRLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLRLFormatSQLVisitor.java
index 6263b3a..c925776 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLRLFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * RL Format SQL visitor for MySQL.
+ */
+public final class MySQLRLFormatSQLVisitor extends MySQLFormatSQLVisitor implements RLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLTCLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLTCLFormatSQLVisitor.java
index 6263b3a..efe472d 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-mysql/src/main/java/org/apache/shardingsphere/sql/parser/mysql/visitor/format/impl/MySQLTCLFormatSQLVisitor.java
@@ -15,24 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.mysql.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.mysql.visitor.format.MySQLFormatSQLVisitor;
 
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * TCL Format SQL visitor for MySQL.
+ */
+public final class MySQLTCLFormatSQLVisitor extends MySQLFormatSQLVisitor implements TCLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/OracleParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/OracleParserConfiguration.java
index b28dda3..27d14e7 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/OracleParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/OracleParserConfiguration.java
@@ -19,10 +19,10 @@ package org.apache.shardingsphere.sql.parser.oracle;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.oracle.lexer.OracleLexer;
 import org.apache.shardingsphere.sql.parser.oracle.parser.OracleParser;
-import org.apache.shardingsphere.sql.parser.oracle.visitor.OracleStatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.oracle.visitor.OracleSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 
 /**
@@ -46,7 +46,7 @@ public final class OracleParserConfiguration implements SQLParserConfiguration {
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return OracleStatementSQLVisitorFacade.class;
+    public Class<? extends SQLVisitorFacade> getVisitorFacadeClass() {
+        return OracleSQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleSQLVisitorFacade.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleSQLVisitorFacade.java
index 4725562..dbaf22a 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleSQLVisitorFacade.java
@@ -15,42 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.spi;
+package org.apache.shardingsphere.sql.parser.oracle.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.oracle.visitor.format.OracleFormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.oracle.visitor.statement.OracleStatementSQLVisitorFacade;
 
 /**
- * SQL parser configuration.
+ * Oracle SQL visitor facade.
  */
-public interface SQLParserConfiguration {
+public final class OracleSQLVisitorFacade implements SQLVisitorFacade {
     
-    /**
-     * Get name of database type.
-     *
-     * @return name of database type
-     */
-    String getDatabaseTypeName();
+    @Override
+    public Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass() {
+        return OracleStatementSQLVisitorFacade.class;
+    }
     
-    /**
-     * Get SQL lexer class type.
-     *
-     * @return SQL lexer class type
-     */
-    Class<? extends SQLLexer> getLexerClass();
-    
-    /**
-     * Get SQL parser class type.
-     * 
-     * @return SQL parser class type
-     */
-    Class<? extends SQLParser> getParserClass();
-    
-    /**
-     * Get SQL visitor facade class.
-     *
-     * @return SQL visitor facade class
-     */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    @Override
+    public Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass() {
+        return OracleFormatSQLVisitorFacade.class;
+    }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/format/OracleFormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/format/OracleFormatSQLVisitorFacade.java
new file mode 100644
index 0000000..806fddf
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/format/OracleFormatSQLVisitorFacade.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.oracle.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+
+/**
+ * Format SQL Visitor facade for MySQL.
+ */
+public final class OracleFormatSQLVisitorFacade implements FormatSQLVisitorFacade {
+    
+    @Override
+    public Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DALFormatSQLVisitor> getDALVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends RLFormatSQLVisitor> getRLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleStatementSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/statement/OracleStatementSQLVisitorFacade.java
similarity index 97%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleStatementSQLVisitorFacade.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/statement/OracleStatementSQLVisitorFacade.java
index 3a34a1d..98774af 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/OracleStatementSQLVisitorFacade.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-oracle/src/main/java/org/apache/shardingsphere/sql/parser/oracle/visitor/statement/OracleStatementSQLVisitorFacade.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.oracle.visitor;
+package org.apache.shardingsphere.sql.parser.oracle.visitor.statement;
 
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.impl.DALStatementSQLVisitor;
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/PostgreSQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/PostgreSQLParserConfiguration.java
index 4d9aafb..6932311 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/PostgreSQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/PostgreSQLParserConfiguration.java
@@ -19,10 +19,10 @@ package org.apache.shardingsphere.sql.parser.postgresql;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.postgresql.lexer.PostgreSQLLexer;
 import org.apache.shardingsphere.sql.parser.postgresql.parser.PostgreSQLParser;
-import org.apache.shardingsphere.sql.parser.postgresql.visitor.PostgreSQLStatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.postgresql.visitor.PostgreSQLSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 
 /**
@@ -46,7 +46,7 @@ public final class PostgreSQLParserConfiguration implements SQLParserConfigurati
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return PostgreSQLStatementSQLVisitorFacade.class;
+    public Class<? extends SQLVisitorFacade> getVisitorFacadeClass() {
+        return PostgreSQLSQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLSQLVisitorFacade.java
similarity index 51%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLSQLVisitorFacade.java
index 4725562..01cd099 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLSQLVisitorFacade.java
@@ -15,42 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.spi;
+package org.apache.shardingsphere.sql.parser.postgresql.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.postgresql.visitor.format.PostgreSQLFormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.postgresql.visitor.statement.PostgreSQLStatementSQLVisitorFacade;
 
 /**
- * SQL parser configuration.
+ * PostgreSQL SQL visitor facade.
  */
-public interface SQLParserConfiguration {
+public final class PostgreSQLSQLVisitorFacade implements SQLVisitorFacade {
     
-    /**
-     * Get name of database type.
-     *
-     * @return name of database type
-     */
-    String getDatabaseTypeName();
+    @Override
+    public Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass() {
+        return PostgreSQLStatementSQLVisitorFacade.class;
+    }
     
-    /**
-     * Get SQL lexer class type.
-     *
-     * @return SQL lexer class type
-     */
-    Class<? extends SQLLexer> getLexerClass();
-    
-    /**
-     * Get SQL parser class type.
-     * 
-     * @return SQL parser class type
-     */
-    Class<? extends SQLParser> getParserClass();
-    
-    /**
-     * Get SQL visitor facade class.
-     *
-     * @return SQL visitor facade class
-     */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    @Override
+    public Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass() {
+        return PostgreSQLFormatSQLVisitorFacade.class;
+    }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/format/PostgreSQLFormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/format/PostgreSQLFormatSQLVisitorFacade.java
new file mode 100644
index 0000000..82daf12
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/format/PostgreSQLFormatSQLVisitorFacade.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.postgresql.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+
+/**
+ * Format SQL Visitor facade for MySQL.
+ */
+public final class PostgreSQLFormatSQLVisitorFacade implements FormatSQLVisitorFacade {
+    
+    @Override
+    public Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DALFormatSQLVisitor> getDALVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends RLFormatSQLVisitor> getRLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLStatementSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/statement/PostgreSQLStatementSQLVisitorFacade.java
similarity index 97%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLStatementSQLVisitorFacade.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/statement/PostgreSQLStatementSQLVisitorFacade.java
index fec7c1e..4738993 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/PostgreSQLStatementSQLVisitorFacade.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-postgresql/src/main/java/org/apache/shardingsphere/sql/parser/postgresql/visitor/statement/PostgreSQLStatementSQLVisitorFacade.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.postgresql.visitor;
+package org.apache.shardingsphere.sql.parser.postgresql.visitor.statement;
 
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.impl.DALStatementSQLVisitor;
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/SQL92ParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/SQL92ParserConfiguration.java
index dc64917..066071a 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/SQL92ParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/SQL92ParserConfiguration.java
@@ -19,11 +19,11 @@ package org.apache.shardingsphere.sql.parser.sql92;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 import org.apache.shardingsphere.sql.parser.sql92.lexer.SQL92Lexer;
 import org.apache.shardingsphere.sql.parser.sql92.parser.SQL92Parser;
-import org.apache.shardingsphere.sql.parser.sql92.visitor.SQL92StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sql92.visitor.SQL92SQLVisitorFacade;
 
 /**
  * SQL parser configuration for SQL92.
@@ -46,7 +46,7 @@ public final class SQL92ParserConfiguration implements SQLParserConfiguration {
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return SQL92StatementSQLVisitorFacade.class;
+    public Class<? extends SQLVisitorFacade> getVisitorFacadeClass() {
+        return SQL92SQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92SQLVisitorFacade.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92SQLVisitorFacade.java
index 4725562..0d8b674 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92SQLVisitorFacade.java
@@ -15,42 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.spi;
+package org.apache.shardingsphere.sql.parser.sql92.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sql92.visitor.format.SQL92FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sql92.visitor.statement.SQL92StatementSQLVisitorFacade;
 
 /**
- * SQL parser configuration.
+ * SQL92 SQL visitor facade.
  */
-public interface SQLParserConfiguration {
+public final class SQL92SQLVisitorFacade implements SQLVisitorFacade {
     
-    /**
-     * Get name of database type.
-     *
-     * @return name of database type
-     */
-    String getDatabaseTypeName();
+    @Override
+    public Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass() {
+        return SQL92StatementSQLVisitorFacade.class;
+    }
     
-    /**
-     * Get SQL lexer class type.
-     *
-     * @return SQL lexer class type
-     */
-    Class<? extends SQLLexer> getLexerClass();
-    
-    /**
-     * Get SQL parser class type.
-     * 
-     * @return SQL parser class type
-     */
-    Class<? extends SQLParser> getParserClass();
-    
-    /**
-     * Get SQL visitor facade class.
-     *
-     * @return SQL visitor facade class
-     */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    @Override
+    public Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass() {
+        return SQL92FormatSQLVisitorFacade.class;
+    }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/format/SQL92FormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/format/SQL92FormatSQLVisitorFacade.java
new file mode 100644
index 0000000..9c51d8a
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/format/SQL92FormatSQLVisitorFacade.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.sql92.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+
+/**
+ * Format SQL Visitor facade for MySQL.
+ */
+public final class SQL92FormatSQLVisitorFacade implements FormatSQLVisitorFacade {
+    
+    @Override
+    public Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DALFormatSQLVisitor> getDALVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends RLFormatSQLVisitor> getRLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92StatementSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/statement/SQL92StatementSQLVisitorFacade.java
similarity index 97%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92StatementSQLVisitorFacade.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/statement/SQL92StatementSQLVisitorFacade.java
index 2b87c99..abb46fd 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/SQL92StatementSQLVisitorFacade.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sql92/src/main/java/org/apache/shardingsphere/sql/parser/sql92/visitor/statement/SQL92StatementSQLVisitorFacade.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.sql92.visitor;
+package org.apache.shardingsphere.sql.parser.sql92.visitor.statement;
 
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.impl.DALStatementSQLVisitor;
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/SQLServerParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/SQLServerParserConfiguration.java
index a4cae75..6e298d9 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/SQLServerParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/SQLServerParserConfiguration.java
@@ -19,11 +19,11 @@ package org.apache.shardingsphere.sql.parser.sqlserver;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 import org.apache.shardingsphere.sql.parser.sqlserver.lexer.SQLServerLexer;
 import org.apache.shardingsphere.sql.parser.sqlserver.parser.SQLServerParser;
-import org.apache.shardingsphere.sql.parser.sqlserver.visitor.SQLServerStatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sqlserver.visitor.SQLServerSQLVisitorFacade;
 
 /**
  * SQL parser configuration for SQLServer.
@@ -46,7 +46,7 @@ public final class SQLServerParserConfiguration implements SQLParserConfiguratio
     }
     
     @Override
-    public Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass() {
-        return SQLServerStatementSQLVisitorFacade.class;
+    public Class<? extends SQLVisitorFacade> getVisitorFacadeClass() {
+        return SQLServerSQLVisitorFacade.class;
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerSQLVisitorFacade.java
similarity index 51%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerSQLVisitorFacade.java
index 4725562..ab74835 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerSQLVisitorFacade.java
@@ -15,42 +15,26 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.spi;
+package org.apache.shardingsphere.sql.parser.sqlserver.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sqlserver.visitor.format.SQLServerFormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.sqlserver.visitor.statement.SQLServerStatementSQLVisitorFacade;
 
 /**
- * SQL parser configuration.
+ * SQLServer SQL visitor facade.
  */
-public interface SQLParserConfiguration {
+public final class SQLServerSQLVisitorFacade implements SQLVisitorFacade {
     
-    /**
-     * Get name of database type.
-     *
-     * @return name of database type
-     */
-    String getDatabaseTypeName();
+    @Override
+    public Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass() {
+        return SQLServerStatementSQLVisitorFacade.class;
+    }
     
-    /**
-     * Get SQL lexer class type.
-     *
-     * @return SQL lexer class type
-     */
-    Class<? extends SQLLexer> getLexerClass();
-    
-    /**
-     * Get SQL parser class type.
-     * 
-     * @return SQL parser class type
-     */
-    Class<? extends SQLParser> getParserClass();
-    
-    /**
-     * Get SQL visitor facade class.
-     *
-     * @return SQL visitor facade class
-     */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    @Override
+    public Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass() {
+        return SQLServerFormatSQLVisitorFacade.class;
+    }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/format/SQLServerFormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/format/SQLServerFormatSQLVisitorFacade.java
new file mode 100644
index 0000000..2e4d646
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/format/SQLServerFormatSQLVisitorFacade.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.sqlserver.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+
+/**
+ * Format SQL Visitor facade for MySQL.
+ */
+public final class SQLServerFormatSQLVisitorFacade implements FormatSQLVisitorFacade {
+    
+    @Override
+    public Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends DALFormatSQLVisitor> getDALVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+    
+    @Override
+    public Class<? extends RLFormatSQLVisitor> getRLVisitorClass() {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerStatementSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/statement/SQLServerStatementSQLVisitorFacade.java
similarity index 97%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerStatementSQLVisitorFacade.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/statement/SQLServerStatementSQLVisitorFacade.java
index b455fe2..5b31fc0 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/SQLServerStatementSQLVisitorFacade.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-dialect/shardingsphere-sql-parser-sqlserver/src/main/java/org/apache/shardingsphere/sql/parser/sqlserver/visitor/statement/SQLServerStatementSQLVisitorFacade.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.sqlserver.visitor;
+package org.apache.shardingsphere.sql.parser.sqlserver.visitor.statement;
 
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.impl.DALStatementSQLVisitor;
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorRule.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRule.java
similarity index 95%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorRule.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRule.java
index 6f7c24d..1ade093 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorRule.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRule.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor.statement;
+package org.apache.shardingsphere.sql.parser.core.visitor;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -26,7 +26,7 @@ import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatementTyp
  * Statement SQL Visitor rule.
  */
 @RequiredArgsConstructor
-public enum StatementSQLVisitorRule {
+public enum SQLVisitorRule {
     
     SELECT("Select", SQLStatementType.DML),
     
@@ -201,9 +201,9 @@ public enum StatementSQLVisitorRule {
      * @param parseTreeClass parse tree class
      * @return visitor rule
      */
-    public static StatementSQLVisitorRule valueOf(final Class<? extends ParseTree> parseTreeClass) {
+    public static SQLVisitorRule valueOf(final Class<? extends ParseTree> parseTreeClass) {
         String parseTreeClassName = parseTreeClass.getSimpleName();
-        for (StatementSQLVisitorRule each : values()) {
+        for (SQLVisitorRule each : values()) {
             if (each.getContextName().equals(parseTreeClassName)) {
                 return each;
             }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/format/FormatSQLVisitorFactory.java
similarity index 82%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/format/FormatSQLVisitorFactory.java
index 4b36de7..5df65db 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/format/FormatSQLVisitorFactory.java
@@ -15,38 +15,40 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor.statement;
+package org.apache.shardingsphere.sql.parser.core.visitor.format;
 
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import lombok.SneakyThrows;
 import org.antlr.v4.runtime.tree.ParseTreeVisitor;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.core.SQLParserConfigurationRegistry;
+import org.apache.shardingsphere.sql.parser.core.visitor.SQLVisitorRule;
 import org.apache.shardingsphere.sql.parser.exception.SQLParsingException;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatementType;
 
 /**
- * Statement SQL visitor factory.
+ * Format SQL visitor factory.
  */
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
-public final class StatementSQLVisitorFactory {
+public final class FormatSQLVisitorFactory {
     
     /** 
      * New instance of statement SQL visitor.
      * 
      * @param databaseTypeName name of database type
-     * @param statementSQLVisitorRule visitor rule
+     * @param SQLVisitorRule visitor rule
      * @return parse tree visitor
      */
-    public static ParseTreeVisitor newInstance(final String databaseTypeName, final StatementSQLVisitorRule statementSQLVisitorRule) {
-        return createParseTreeVisitor(SQLParserConfigurationRegistry.getInstance().getSQLParserConfiguration(databaseTypeName), statementSQLVisitorRule.getType());
+    public static ParseTreeVisitor newInstance(final String databaseTypeName, final SQLVisitorRule SQLVisitorRule) {
+        return createParseTreeVisitor(SQLParserConfigurationRegistry.getInstance().getSQLParserConfiguration(databaseTypeName), SQLVisitorRule.getType());
     }
     
     @SneakyThrows(ReflectiveOperationException.class)
     private static ParseTreeVisitor createParseTreeVisitor(final SQLParserConfiguration config, final SQLStatementType type) {
-        StatementSQLVisitorFacade visitorFacade = config.getVisitorFacadeClass().getConstructor().newInstance();
+        FormatSQLVisitorFacade visitorFacade =
+                config.getVisitorFacadeClass().getConstructor().newInstance().getFormatSQLVisitorFacadeClass().getConstructor().newInstance();
         switch (type) {
             case DML:
                 return (ParseTreeVisitor) visitorFacade.getDMLVisitorClass().getConstructor().newInstance();
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java
index 4b36de7..db8aa04 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/core/visitor/statement/StatementSQLVisitorFactory.java
@@ -23,6 +23,7 @@ import lombok.SneakyThrows;
 import org.antlr.v4.runtime.tree.ParseTreeVisitor;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.core.SQLParserConfigurationRegistry;
+import org.apache.shardingsphere.sql.parser.core.visitor.SQLVisitorRule;
 import org.apache.shardingsphere.sql.parser.exception.SQLParsingException;
 import org.apache.shardingsphere.sql.parser.spi.SQLParserConfiguration;
 import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatementType;
@@ -37,16 +38,17 @@ public final class StatementSQLVisitorFactory {
      * New instance of statement SQL visitor.
      * 
      * @param databaseTypeName name of database type
-     * @param statementSQLVisitorRule visitor rule
+     * @param SQLVisitorRule visitor rule
      * @return parse tree visitor
      */
-    public static ParseTreeVisitor newInstance(final String databaseTypeName, final StatementSQLVisitorRule statementSQLVisitorRule) {
-        return createParseTreeVisitor(SQLParserConfigurationRegistry.getInstance().getSQLParserConfiguration(databaseTypeName), statementSQLVisitorRule.getType());
+    public static ParseTreeVisitor newInstance(final String databaseTypeName, final SQLVisitorRule SQLVisitorRule) {
+        return createParseTreeVisitor(SQLParserConfigurationRegistry.getInstance().getSQLParserConfiguration(databaseTypeName), SQLVisitorRule.getType());
     }
     
     @SneakyThrows(ReflectiveOperationException.class)
     private static ParseTreeVisitor createParseTreeVisitor(final SQLParserConfiguration config, final SQLStatementType type) {
-        StatementSQLVisitorFacade visitorFacade = config.getVisitorFacadeClass().getConstructor().newInstance();
+        StatementSQLVisitorFacade visitorFacade =
+                config.getVisitorFacadeClass().getConstructor().newInstance().getStatementSQLVisitorFacadeClass().getConstructor().newInstance();
         switch (type) {
             case DML:
                 return (ParseTreeVisitor) visitorFacade.getDMLVisitorClass().getConstructor().newInstance();
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/engine/statement/standard/StandardSQLParserEngine.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/engine/statement/standard/StandardSQLParserEngine.java
index ca6f0dc..6a87497 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/engine/statement/standard/StandardSQLParserEngine.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/main/java/org/apache/shardingsphere/sql/parser/engine/statement/standard/StandardSQLParserEngine.java
@@ -20,7 +20,7 @@ package org.apache.shardingsphere.sql.parser.engine.statement.standard;
 import lombok.RequiredArgsConstructor;
 import org.antlr.v4.runtime.tree.ParseTree;
 import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorFactory;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
+import org.apache.shardingsphere.sql.parser.core.visitor.SQLVisitorRule;
 import org.apache.shardingsphere.sql.parser.engine.statement.StatementSQLParserEngine;
 import org.apache.shardingsphere.sql.parser.core.parser.SQLParserExecutor;
 import org.apache.shardingsphere.sql.parser.hook.ParsingHookRegistry;
@@ -70,7 +70,7 @@ public final class StandardSQLParserEngine implements StatementSQLParserEngine {
             }
         }
         ParseTree parseTree = new SQLParserExecutor(databaseTypeName, sql).execute().getRootNode();
-        SQLStatement result = (SQLStatement) StatementSQLVisitorFactory.newInstance(databaseTypeName, StatementSQLVisitorRule.valueOf(parseTree.getClass())).visit(parseTree);
+        SQLStatement result = (SQLStatement) StatementSQLVisitorFactory.newInstance(databaseTypeName, SQLVisitorRule.valueOf(parseTree.getClass())).visit(parseTree);
         if (useCache) {
             cache.put(sql, result);
         }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRuleTest.java
similarity index 79%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRuleTest.java
index 6263b3a..24e454a 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/SQLVisitorRuleTest.java
@@ -18,21 +18,20 @@
 package org.apache.shardingsphere.sql.parser.core.visitor;
 
 import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
 import org.junit.Test;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;
 
-public final class StatementSQLVisitorRuleTest {
+public final class SQLVisitorRuleTest {
     
     @Test
     public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
+        assertThat(SQLVisitorRule.valueOf(SelectContext.class), is(SQLVisitorRule.SELECT));
     }
     
     @Test(expected = IllegalArgumentException.class)
     public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
+        SQLVisitorRule.valueOf(ParseTree.class);
     }
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorFacade.java
similarity index 54%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorFacade.java
index 4725562..4122dcf 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorFacade.java
@@ -15,42 +15,27 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.spi;
+package org.apache.shardingsphere.sql.parser.api.visitor;
 
-import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
-import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.FormatSQLVisitorFacade;
 import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
 
 /**
- * SQL parser configuration.
+ * SQL visitor facade.
  */
-public interface SQLParserConfiguration {
+public interface SQLVisitorFacade {
     
     /**
-     * Get name of database type.
+     * Get Statement visitor facade class.
      *
-     * @return name of database type
+     * @return DML visitor class
      */
-    String getDatabaseTypeName();
+    Class<? extends StatementSQLVisitorFacade> getStatementSQLVisitorFacadeClass();
     
     /**
-     * Get SQL lexer class type.
+     * Get Format visitor facade class.
      *
-     * @return SQL lexer class type
+     * @return DDL visitor class
      */
-    Class<? extends SQLLexer> getLexerClass();
-    
-    /**
-     * Get SQL parser class type.
-     * 
-     * @return SQL parser class type
-     */
-    Class<? extends SQLParser> getParserClass();
-    
-    /**
-     * Get SQL visitor facade class.
-     *
-     * @return SQL visitor facade class
-     */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    Class<? extends FormatSQLVisitorFacade> getFormatSQLVisitorFacadeClass();
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorType.java
similarity index 53%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorType.java
index 6263b3a..5cc459d 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/SQLVisitorType.java
@@ -15,24 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
+/**
+ * SQL visitor type.
+ */
+public enum SQLVisitorType {
     
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+    STATEMENT, FORMAT
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/FormatSQLVisitorFacade.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/FormatSQLVisitorFacade.java
new file mode 100644
index 0000000..0b5ba33
--- /dev/null
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/FormatSQLVisitorFacade.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.sql.parser.api.visitor.format;
+
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DALFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DCLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DDLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.DMLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.RLFormatSQLVisitor;
+import org.apache.shardingsphere.sql.parser.api.visitor.format.impl.TCLFormatSQLVisitor;
+
+/**
+ * Format SQL visitor facade.
+ */
+public interface FormatSQLVisitorFacade {
+    
+    /**
+     * Get DML visitor class.
+     *
+     * @return DML visitor class
+     */
+    Class<? extends DMLFormatSQLVisitor> getDMLVisitorClass();
+    
+    /**
+     * Get DDL visitor class.
+     *
+     * @return DDL visitor class
+     */
+    Class<? extends DDLFormatSQLVisitor> getDDLVisitorClass();
+    
+    /**
+     * Get TCL visitor class.
+     *
+     * @return TCL visitor class
+     */
+    Class<? extends TCLFormatSQLVisitor> getTCLVisitorClass();
+    
+    /**
+     * Get DCL visitor class.
+     *
+     * @return DCL visitor class
+     */
+    Class<? extends DCLFormatSQLVisitor> getDCLVisitorClass();
+    
+    /**
+     * Get DAL visitor class.
+     *
+     * @return DAL visitor class
+     */
+    Class<? extends DALFormatSQLVisitor> getDALVisitorClass();
+    
+    /**
+     * Get RL visitor class.
+     * 
+     * @return RL visitor class
+     */
+    Class<? extends RLFormatSQLVisitor> getRLVisitorClass();
+}
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DALFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DALFormatSQLVisitor.java
index 6263b3a..b773787 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DALFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DAL format SQL visitor.
+ */
+public interface DALFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DCLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DCLFormatSQLVisitor.java
index 6263b3a..9ebcba4 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DCLFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DCL format SQL visitor.
+ */
+public interface DCLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DDLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DDLFormatSQLVisitor.java
index 6263b3a..adcd0c6 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DDLFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DDL format SQL visitor.
+ */
+public interface DDLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DMLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DMLFormatSQLVisitor.java
index 6263b3a..ab207a0 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/DMLFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * DML format SQL visitor.
+ */
+public interface DMLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/RLFormatSQLVisitor.java
similarity index 52%
copy from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
copy to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/RLFormatSQLVisitor.java
index 6263b3a..398da19 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/RLFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * RL format SQL visitor.
+ */
+public interface RLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/TCLFormatSQLVisitor.java
similarity index 52%
rename from shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
rename to shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/TCLFormatSQLVisitor.java
index 6263b3a..ffe8f5d 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-engine/src/test/java/org/apache/shardingsphere/sql/parser/core/visitor/StatementSQLVisitorRuleTest.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/api/visitor/format/impl/TCLFormatSQLVisitor.java
@@ -15,24 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.sql.parser.core.visitor;
+package org.apache.shardingsphere.sql.parser.api.visitor.format.impl;
 
-import org.antlr.v4.runtime.tree.ParseTree;
-import org.apache.shardingsphere.sql.parser.core.visitor.statement.StatementSQLVisitorRule;
-import org.junit.Test;
-
-import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.assertThat;
-
-public final class StatementSQLVisitorRuleTest {
-    
-    @Test
-    public void assertValueOfParseTreeClassSuccess() {
-        assertThat(StatementSQLVisitorRule.valueOf(SelectContext.class), is(StatementSQLVisitorRule.SELECT));
-    }
-    
-    @Test(expected = IllegalArgumentException.class)
-    public void assertValueOfParseTreeClassFailure() {
-        StatementSQLVisitorRule.valueOf(ParseTree.class);
-    }
+/**
+ * TCL format SQL visitor.
+ */
+public interface TCLFormatSQLVisitor {
 }
diff --git a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
index 4725562..a5e8b04 100644
--- a/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
+++ b/shardingsphere-sql-parser/shardingsphere-sql-parser-spi/src/main/java/org/apache/shardingsphere/sql/parser/spi/SQLParserConfiguration.java
@@ -19,7 +19,7 @@ package org.apache.shardingsphere.sql.parser.spi;
 
 import org.apache.shardingsphere.sql.parser.api.lexer.SQLLexer;
 import org.apache.shardingsphere.sql.parser.api.parser.SQLParser;
-import org.apache.shardingsphere.sql.parser.api.visitor.statement.StatementSQLVisitorFacade;
+import org.apache.shardingsphere.sql.parser.api.visitor.SQLVisitorFacade;
 
 /**
  * SQL parser configuration.
@@ -52,5 +52,5 @@ public interface SQLParserConfiguration {
      *
      * @return SQL visitor facade class
      */
-    Class<? extends StatementSQLVisitorFacade> getVisitorFacadeClass();
+    Class<? extends SQLVisitorFacade> getVisitorFacadeClass();
 }