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Ran 31 Dec 2018 05:27AM UTC

Files 1021

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Committed 31 Dec 2018 05:27AM UTC coverage: 78.995% (-0.05%) from 79.044%

Job # 1412.1

Build Type

push

jenkins

Committed by manishgupta88

Commit Message

[CARBONDATA-3202]update the schema to session catalog after add column, drop column and column rename

Problem:

1. For alter table rename, once we change the table name in carbon, we fire alter table rename DDL using hive client. But for add, drop and column
rename Spark does not support there features, but hive supports. so after rename, or add or drop column, the new updated schema is not updated in catalog.
2. after column rename column comment is not getting copied to renamed column

Solution:

1. We can directly call the spark API alterTableDataSchema by passing the updated schema, which in turn updates the shema in sessioncatalog. Since
this API is supported from spark2.1 onward, codes changes will be for spark 2.2 and spark2.3, behavior with spark2.1 remains the same.
2. while updating the catalog schema, if column has comment, put in column metadata

This closes #3027

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