[GitHub] [inlong] gong commented on a diff in pull request #7846: [INLONG-7660][Sort] Support DDL model for MySQL connector when running in all migrate mode

["gong (via GitHub)" <gi...@apache.org>]

gong commented on code in PR #7846:
URL: https://github.com/apache/inlong/pull/7846#discussion_r1170785078


##########
inlong-sort/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/utils/MetaDataUtils.java:
##########
@@ -0,0 +1,233 @@
+/*
+ * 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.inlong.sort.cdc.mysql.utils;
+
+import static org.apache.inlong.sort.base.Constants.DDL_FIELD_NAME;
+import static org.apache.inlong.sort.cdc.mysql.source.utils.RecordUtils.isSnapshotRecord;
+import static org.apache.inlong.sort.cdc.mysql.utils.OperationUtils.generateOperation;
+import io.debezium.connector.AbstractSourceInfo;
+import io.debezium.data.Envelope;
+import io.debezium.data.Envelope.FieldName;
+import io.debezium.relational.Table;
+import io.debezium.relational.history.TableChanges;
+import io.debezium.relational.history.TableChanges.TableChange;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import javax.annotation.Nullable;
+import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper;
+import org.apache.flink.table.data.GenericRowData;
+import org.apache.flink.table.data.StringData;
+import org.apache.inlong.sort.cdc.base.util.RecordUtils;
+import org.apache.inlong.sort.formats.json.canal.CanalJson;
+import org.apache.inlong.sort.formats.json.debezium.DebeziumJson;
+import org.apache.inlong.sort.formats.json.debezium.DebeziumJson.Source;
+import org.apache.kafka.connect.data.Struct;
+import org.apache.kafka.connect.source.SourceRecord;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utils for generating metadata in mysql cdc.
+ */
+public class MetaDataUtils {
+
+    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+    private static final Logger LOG = LoggerFactory.getLogger(MetaDataUtils.class);
+
+    /**
+     * get sql type from table schema, represents the jdbc data type
+     *
+     * @param tableSchema table schema
+     */
+    public static Map<String, Integer> getSqlType(@Nullable TableChanges.TableChange tableSchema) {
+        if (tableSchema == null) {
+            return null;
+        }
+        Map<String, Integer> sqlType = new LinkedHashMap<>();
+        final Table table = tableSchema.getTable();
+        table.columns().forEach(
+                column -> sqlType.put(column.name(), column.jdbcType()));
+        return sqlType;
+    }
+
+    public static String getMetaData(SourceRecord record, String tableNameKey) {
+        Struct messageStruct = (Struct) record.value();
+        Struct sourceStruct = messageStruct.getStruct(FieldName.SOURCE);
+        return sourceStruct.getString(tableNameKey);
+    }
+
+    public static String getOpType(SourceRecord record) {
+        String opType;
+        final Envelope.Operation op = Envelope.operationFor(record);
+        if (op == Envelope.Operation.CREATE || op == Envelope.Operation.READ) {
+            opType = "INSERT";
+        } else if (op == Envelope.Operation.DELETE) {
+            opType = "DELETE";
+        } else {
+            opType = "UPDATE";
+        }
+        return opType;
+    }
+
+    public static String getCanalOpType(GenericRowData record) {
+        String opType;
+        switch (record.getRowKind()) {
+            case DELETE:
+            case UPDATE_BEFORE:
+                opType = "DELETE";
+                break;
+            case INSERT:
+            case UPDATE_AFTER:
+                opType = "INSERT";
+                break;
+            default:
+                throw new IllegalStateException("the record only have states in DELETE, "
+                        + "UPDATE_BEFORE, INSERT and UPDATE_AFTER");
+        }
+        return opType;
+    }
+
+    public static String getDebeziumOpType(GenericRowData record) {
+        String opType;
+        switch (record.getRowKind()) {
+            case DELETE:
+            case UPDATE_BEFORE:
+                opType = "d";
+                break;
+            case INSERT:
+            case UPDATE_AFTER:
+                opType = "c";
+                break;
+            default:
+                throw new IllegalStateException("the record only have states in DELETE, "
+                        + "UPDATE_BEFORE, INSERT and UPDATE_AFTER");
+        }
+        return opType;
+    }
+
+    public static List<String> getPkNames(@Nullable TableChanges.TableChange tableSchema) {
+        if (tableSchema == null) {
+            return null;
+        }
+        return tableSchema.getTable().primaryKeyColumnNames();
+    }
+
+    public static Map<String, String> getMysqlType(@Nullable TableChanges.TableChange tableSchema) {
+        if (tableSchema == null) {
+            return null;
+        }
+        Map<String, String> mysqlType = new LinkedHashMap<>();
+        final Table table = tableSchema.getTable();
+        table.columns()
+                .forEach(
+                        column -> {
+                            mysqlType.put(
+                                    column.name(),
+                                    String.format(
+                                            "%s(%d)",
+                                            column.typeName(),
+                                            column.length()));
+                        });

Review Comment:
   > yes since type name is string and length is int
   
   @EMsnap text longtext and other type don't have length



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