[GitHub] [shardingsphere] tuichenchuxin commented on a diff in pull request #22166: Add pg_class and pg_namespace data collector.

[GitBox <gi...@apache.org>]

tuichenchuxin commented on code in PR #22166:
URL: https://github.com/apache/shardingsphere/pull/22166#discussion_r1021231654


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infra/common/src/main/java/org/apache/shardingsphere/infra/metadata/data/collector/tables/PgClassTableCollector.java:
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@@ -0,0 +1,89 @@
+/*
+ * 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.infra.metadata.data.collector.tables;
+
+import org.apache.shardingsphere.infra.metadata.data.ShardingSphereRowData;
+import org.apache.shardingsphere.infra.metadata.data.ShardingSphereTableData;
+import org.apache.shardingsphere.infra.metadata.data.collector.ShardingSphereDataCollector;
+import org.apache.shardingsphere.infra.metadata.database.ShardingSphereDatabase;
+import org.apache.shardingsphere.infra.metadata.database.schema.decorator.model.ShardingSphereTable;
+
+import javax.sql.DataSource;
+import java.math.BigInteger;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.sql.Types;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * Table pg_class data collector.
+ */
+public final class PgClassTableCollector implements ShardingSphereDataCollector {
+    
+    private static final String PG_CLASS = "pg_class";
+    
+    private static final String SELECT_SQL = "SELECT oid, relname, relnamespace, reltype, reloftype, relowner, relam, relfilenode, reltablespace, relpages, reltuples, relallvisible, reltoastrelid,"
+            + "relhasindex, relisshared, relpersistence, relkind, relnatts, relchecks, relhasrules, relhastriggers, relhassubclass, relrowsecurity, relforcerowsecurity, relispopulated, relreplident,"
+            + "relispartition, relrewrite, relfrozenxid, relminmxid, relacl, reloptions, relpartbound FROM pg_catalog.pg_class "
+            + "WHERE relkind IN ('r','v','m','S','L','f','e','o','') AND relname NOT LIKE 'matviewmap\\_%' AND relname NOT LIKE 'mlog\\_%' "
+            + "AND pg_catalog.pg_table_is_visible(oid);";
+    
+    @Override
+    public Optional<ShardingSphereTableData> collect(final ShardingSphereDatabase shardingSphereDatabase, final ShardingSphereTable table) throws SQLException {
+        ShardingSphereTableData result = new ShardingSphereTableData(PG_CLASS, new ArrayList<>(table.getColumns().values()));
+        for (DataSource each : shardingSphereDatabase.getResourceMetaData().getDataSources().values()) {
+            try (
+                    Connection connection = each.getConnection();
+                    Statement statement = connection.createStatement()
+            ) {
+                ResultSet resultSet = statement.executeQuery(SELECT_SQL);

Review Comment:
   Done. Thanks.



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