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author | eyal farago <eyal farago> | 2016-11-01 17:12:20 +0100 |
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committer | Herman van Hovell <hvanhovell@databricks.com> | 2016-11-01 17:12:20 +0100 |
commit | 5441a6269e00e3903ae6c1ea8deb4ddf3d2e9975 (patch) | |
tree | 54c00373573510b26265761cdb86846c01a704a2 /sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql | |
parent | f7c145d8ce14b23019099c509d5a2b6dfb1fe62c (diff) | |
download | spark-5441a6269e00e3903ae6c1ea8deb4ddf3d2e9975.tar.gz spark-5441a6269e00e3903ae6c1ea8deb4ddf3d2e9975.tar.bz2 spark-5441a6269e00e3903ae6c1ea8deb4ddf3d2e9975.zip |
[SPARK-16839][SQL] redundant aliases after cleanupAliases
## What changes were proposed in this pull request?
Simplify struct creation, especially the aspect of `CleanupAliases` which missed some aliases when handling trees created by `CreateStruct`.
This PR includes:
1. A failing test (create struct with nested aliases, some of the aliases survive `CleanupAliases`).
2. A fix that transforms `CreateStruct` into a `CreateNamedStruct` constructor, effectively eliminating `CreateStruct` from all expression trees.
3. A `NamePlaceHolder` used by `CreateStruct` when column names cannot be extracted from unresolved `NamedExpression`.
4. A new Analyzer rule that resolves `NamePlaceHolder` into a string literal once the `NamedExpression` is resolved.
5. `CleanupAliases` code was simplified as it no longer has to deal with `CreateStruct`'s top level columns.
## How was this patch tested?
running all tests-suits in package org.apache.spark.sql, especially including the analysis suite, making sure added test initially fails, after applying suggested fix rerun the entire analysis package successfully.
modified few tests that expected `CreateStruct` which is now transformed into `CreateNamedStruct`.
Credit goes to hvanhovell for assisting with this PR.
Author: eyal farago <eyal farago>
Author: eyal farago <eyal.farago@gmail.com>
Author: Herman van Hovell <hvanhovell@databricks.com>
Author: Eyal Farago <eyal.farago@actimize.com>
Author: Hyukjin Kwon <gurwls223@gmail.com>
Author: eyalfa <eyal.farago@gmail.com>
Closes #14444 from eyalfa/SPARK-16839_redundant_aliases_after_cleanupAliases.
Diffstat (limited to 'sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql')
-rw-r--r-- | sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql b/sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql index de0116a4dc..cdda29af50 100644 --- a/sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql +++ b/sql/hive/src/test/resources/sqlgen/subquery_in_having_2.sql @@ -7,4 +7,4 @@ having b.key in (select a.key where a.value > 'val_9' and a.value = min(b.value)) order by b.key -------------------------------------------------------------------------------- -SELECT `gen_attr_0` AS `key`, `gen_attr_1` AS `min(value)` FROM (SELECT `gen_attr_0`, `gen_attr_1` FROM (SELECT `gen_attr_0`, min(`gen_attr_5`) AS `gen_attr_1`, min(`gen_attr_5`) AS `gen_attr_4` FROM (SELECT `key` AS `gen_attr_0`, `value` AS `gen_attr_5` FROM `default`.`src`) AS gen_subquery_0 GROUP BY `gen_attr_0` HAVING (struct(`gen_attr_0`, `gen_attr_4`) IN (SELECT `gen_attr_6` AS `_c0`, `gen_attr_7` AS `_c1` FROM (SELECT `gen_attr_2` AS `gen_attr_6`, `gen_attr_3` AS `gen_attr_7` FROM (SELECT `gen_attr_2`, `gen_attr_3` FROM (SELECT `key` AS `gen_attr_2`, `value` AS `gen_attr_3` FROM `default`.`src`) AS gen_subquery_3 WHERE (`gen_attr_3` > 'val_9')) AS gen_subquery_2) AS gen_subquery_4))) AS gen_subquery_1 ORDER BY `gen_attr_0` ASC NULLS FIRST) AS b +SELECT `gen_attr_0` AS `key`, `gen_attr_1` AS `min(value)` FROM (SELECT `gen_attr_0`, `gen_attr_1` FROM (SELECT `gen_attr_0`, min(`gen_attr_5`) AS `gen_attr_1`, min(`gen_attr_5`) AS `gen_attr_4` FROM (SELECT `key` AS `gen_attr_0`, `value` AS `gen_attr_5` FROM `default`.`src`) AS gen_subquery_0 GROUP BY `gen_attr_0` HAVING (named_struct('gen_attr_0', `gen_attr_0`, 'gen_attr_4', `gen_attr_4`) IN (SELECT `gen_attr_6` AS `_c0`, `gen_attr_7` AS `_c1` FROM (SELECT `gen_attr_2` AS `gen_attr_6`, `gen_attr_3` AS `gen_attr_7` FROM (SELECT `gen_attr_2`, `gen_attr_3` FROM (SELECT `key` AS `gen_attr_2`, `value` AS `gen_attr_3` FROM `default`.`src`) AS gen_subquery_3 WHERE (`gen_attr_3` > 'val_9')) AS gen_subquery_2) AS gen_subquery_4))) AS gen_subquery_1 ORDER BY `gen_attr_0` ASC NULLS FIRST) AS b |