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| author | Xin Wu <xinwu@us.ibm.com> | 2016-09-14 21:14:29 +0200 |
|---|---|---|
| committer | Herman van Hovell <hvanhovell@databricks.com> | 2016-09-14 21:14:29 +0200 |
| commit | 040e46979d5f90edc7f9be3cbedd87e8986e8053 (patch) | |
| tree | 65b9ac14a2ddf54a1f0e8d3c251645fb4ea23273 /sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql | |
| parent | a79838bdeeb12cec4d50da3948bd8a33777e53a6 (diff) | |
| download | spark-040e46979d5f90edc7f9be3cbedd87e8986e8053.tar.gz spark-040e46979d5f90edc7f9be3cbedd87e8986e8053.tar.bz2 spark-040e46979d5f90edc7f9be3cbedd87e8986e8053.zip | |
[SPARK-10747][SQL] Support NULLS FIRST|LAST clause in ORDER BY
## What changes were proposed in this pull request?
Currently, ORDER BY clause returns nulls value according to sorting order (ASC|DESC), considering null value is always smaller than non-null values.
However, SQL2003 standard support NULLS FIRST or NULLS LAST to allow users to specify whether null values should be returned first or last, regardless of sorting order (ASC|DESC).
This PR is to support this new feature.
## How was this patch tested?
New test cases are added to test NULLS FIRST|LAST for regular select queries and windowing queries.
(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)
Author: Xin Wu <xinwu@us.ibm.com>
Closes #14842 from xwu0226/SPARK-10747.
Diffstat (limited to 'sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql')
| -rw-r--r-- | sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql b/sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql new file mode 100644 index 0000000000..4739f05808 --- /dev/null +++ b/sql/hive/src/test/resources/sqlgen/window_basic_asc_nulls_last.sql @@ -0,0 +1,5 @@ +-- This file is automatically generated by LogicalPlanToSQLSuite. +SELECT key, value, ROUND(AVG(key) OVER (), 2) +FROM parquet_t1 ORDER BY key nulls last +-------------------------------------------------------------------------------- +SELECT `gen_attr_0` AS `key`, `gen_attr_1` AS `value`, `gen_attr_2` AS `round(avg(key) OVER (ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING), 2)` FROM (SELECT `gen_attr_0`, `gen_attr_1`, round(`gen_attr_3`, 2) AS `gen_attr_2` FROM (SELECT gen_subquery_1.`gen_attr_0`, gen_subquery_1.`gen_attr_1`, avg(`gen_attr_0`) OVER (ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) AS `gen_attr_3` FROM (SELECT `gen_attr_0`, `gen_attr_1` FROM (SELECT `key` AS `gen_attr_0`, `value` AS `gen_attr_1` FROM `default`.`parquet_t1`) AS gen_subquery_0) AS gen_subquery_1) AS gen_subquery_2 ORDER BY `gen_attr_0` ASC NULLS LAST) AS parquet_t1 |