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https://issues.apache.org/jira/browse/FLINK-37357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hirson Zhang updated FLINK-37357:
---------------------------------
    Summary: Migrating SqlNode conversion logic from  to SqlNodeConverters  
(was: Migrating conversion logic to SqlNodeConverters)

> Migrating SqlNode conversion logic from  to SqlNodeConverters
> -------------------------------------------------------------
>
>                 Key: FLINK-37357
>                 URL: https://issues.apache.org/jira/browse/FLINK-37357
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>    Affects Versions: 2.0-preview
>            Reporter: Hirson Zhang
>            Priority: Major
>
> There is a "TODO" at class "SqlNodeToOperationConversion", method 
> "convertValidatedSqlNode": 
> "TODO: all the below conversion logic should be migrated to 
> SqlNodeConverters".
> Part of the code: 
> {code:java}
> /** Convert a validated sql node to Operation. */
> private static Optional<Operation> convertValidatedSqlNode(
>         FlinkPlannerImpl flinkPlanner, CatalogManager catalogManager, SqlNode 
> validated) {
>     beforeConversion();    // delegate conversion to the registered 
> converters first
>     SqlNodeConvertContext context = new SqlNodeConvertContext(flinkPlanner, 
> catalogManager);
>     Optional<Operation> operation = 
> SqlNodeConverters.convertSqlNode(validated, context);
>     if (operation.isPresent()) {
>         return operation;
>     }    // TODO: all the below conversion logic should be migrated to 
> SqlNodeConverters
>     SqlNodeToOperationConversion converter =
>             new SqlNodeToOperationConversion(flinkPlanner, catalogManager);
>     if (validated instanceof SqlDropCatalog) {
>         return Optional.of(converter.convertDropCatalog((SqlDropCatalog) 
> validated));
>     } else if (validated instanceof SqlLoadModule) {
>         return Optional.of(converter.convertLoadModule((SqlLoadModule) 
> validated));
>     } else if (validated instanceof SqlShowCurrentCatalog) {
>         return Optional.of(
>                 converter.convertShowCurrentCatalog((SqlShowCurrentCatalog) 
> validated));
>     } else if (validated instanceof SqlShowModules) {
>         return Optional.of(converter.convertShowModules((SqlShowModules) 
> validated)); 
> .....{code}



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