Terry Kim 5866bc77d7 [SPARK-30814][SQL] ALTER TABLE ... ADD COLUMN position should be able to reference columns being added ... ### What changes were proposed in this pull request? In ALTER TABLE, a column in ADD COLUMNS can depend on the position of a column that is just being added. For example, for a table with the following schema: ``` root: - a: string - b: long ``` , the following should work: ``` ALTER TABLE t ADD COLUMNS (x int AFTER a, y int AFTER x) ``` Currently, the above statement will throw an exception saying that AFTER x cannot be resolved, because x doesn't exist yet. This PR proposes to fix this issue. ### Why are the changes needed? To fix a bug described above. ### Does this PR introduce any user-facing change? Yes, now ``` ALTER TABLE t ADD COLUMNS (x int AFTER a, y int AFTER x) ``` works as expected. ### How was this patch tested? Added new tests Closes #27584 from imback82/alter_table_pos_fix. Authored-by: Terry Kim <yuminkim@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com>		2020-02-18 13:01:45 +08:00
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benchmarks	[SPARK-30843][SQL] Fix getting of time components before 1582 year	2020-02-17 13:59:21 +08:00
src	[SPARK-30814][SQL] ALTER TABLE ... ADD COLUMN position should be able to reference columns being added	2020-02-18 13:01:45 +08:00
v1.2/src	[SPARK-30578][SQL][TEST] Explicitly set conf to use DSv2 for orc in OrcFilterSuite	2020-01-20 21:42:33 +08:00
v2.3/src	[SPARK-30578][SQL][TEST] Explicitly set conf to use DSv2 for orc in OrcFilterSuite	2020-01-20 21:42:33 +08:00
pom.xml	[INFRA] Reverts commit 56dcd79 and c216ef1	2019-12-16 19:57:44 -07:00