ediconss opened a new issue, #27957:
URL: https://github.com/apache/shardingsphere/issues/27957
## Bug Report
when use PostgreSQL parse "ALTER TABLE tbl RENAME COLUMN c1 to c2" , use
PostgreSQLAlterTableStatement.getRenameColumnDefinitions is return null
### Which version of ShardingSphere did you use?
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Parse
### Expected behavior
PostgreSQLAlterTableStatement.getRenameColumnDefinitions return
RenameColumnDefinitions
### Actual behavior
return null
### Reason analyze (If you can)
in PostgreSQLDDLStatementVisitor.visitAlterDefinitionClause methed not set
```
@Override
public ASTNode visitAlterDefinitionClause(final
AlterDefinitionClauseContext ctx) {
CollectionValue<AlterDefinitionSegment> result = new
CollectionValue<>();
PostgreSQLStatementParser.AlterTableActionsContext
alterTableActionsContext = ctx.alterTableActions();
if (null != alterTableActionsContext) {
result.getValue().addAll(alterTableActionsContext.alterTableAction().stream().flatMap(each
-> getAlterDefinitionSegments(each).stream()).collect(Collectors.toList()));
}
if (null != ctx.renameTableSpecification()) {
result.getValue().add((RenameTableDefinitionSegment)
visit(ctx.renameTableSpecification()));
}
return result;
}
```
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
### Example codes for reproduce this issue (such as a github link).
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