In JdbcMysqlClient, I've added methods to retrieve auto-increment and default value columns from MySQL. These columns are then mapped into Doris metadata to make them visible to users.
When handling the InsertStmt into an execution plan, Doris used to automatically fill in NULL or default values for columns not specified in the InsertStmt. However, in the JDBC catalog, we don't need Doris to handle these unspecified columns, so I've made changes to skip them directly.
For the insert prepared statement required for writing, our previous behavior was to obtain all columns for placeholders. So, the change I made is to pass in the columns processed by the execution plan during the sink task generation stage for dynamic generation.
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