revert [SPARK-29680][SQL] Remove ALTER TABLE CHANGE COLUMN syntax #27076
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Test build #116036 has finished for PR 27076 at commit
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viirya
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Jan 2, 2020
| (TYPE dataType)? (COMMENT comment=STRING)? colPosition? #alterTableColumn | ||
| | ALTER TABLE table=multipartIdentifier partitionSpec? | ||
| CHANGE COLUMN? | ||
| colName=multipartIdentifier colType colPosition? #hiveChangeColumn |
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colName was errorCapturingIdentifier before. We want it to be multipartIdentifier?
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Though it is fine because ResolveSessionCatalog will detect and throw AnalysisException("ALTER COLUMN with qualified column is only supported with v2 tables.").
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This is to be consistent with the other ALTER COLUMN syntax.
viirya
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Jan 2, 2020
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I see. So this is for hive compatibility, looks good to me.
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thanks for review, merging to master! |
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What changes were proposed in this pull request?
Revert #26338 , as the syntax is actually the hive style ALTER COLUMN.
This PR brings it back, and make it support multi-catalog:
AlterTableAlterColumnStatementcan't do renaming.Why are the changes needed?
to not break hive compatibility.
Does this PR introduce any user-facing change?
no, as the removal was merged in 3.0.
How was this patch tested?
new parser tests