[FLINK-37855-][cdc-connector-mysql] Reduce the time cost in MySqlSchemaUtils#listTables #4032
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lvyanquan
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Jun 3, 2025
...nector-mysql/src/main/java/org/apache/flink/cdc/connectors/mysql/utils/MySqlSchemaUtils.java
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...nector-mysql/src/main/java/org/apache/flink/cdc/connectors/mysql/utils/MySqlSchemaUtils.java
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...dc/src/main/java/org/apache/flink/cdc/connectors/mysql/source/utils/TableDiscoveryUtils.java
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I think the key point is reusing the connection, instead of changing the query sql. |
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https://issues.apache.org/jira/browse/FLINK-37855
MySqlSchemaUtils#listTables and TableDiscoveryUtils#listTables is called to get the table names of all tables that need to be processed, However, in scenarios involving many databases and tables, this method call will require querying the database many times, resulting in a long processing time.
The optimization idea is to use mysql's metadata information, a connection to get all the library table information.