[GitHub] spark pull request #14257: [SPARK-16621][SQL] Generate stable SQLs in SQLBui...

[dongjoon-hyun <gi...@git.apache.org>]

Github user dongjoon-hyun commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14257#discussion_r72181359
  
    --- Diff: sql/hive/src/test/resources/sqlgen/predicate_subquery.sql ---
    @@ -1,4 +1,4 @@
     -- This file is automatically generated by LogicalPlanToSQLSuite.
     select * from t1 b where exists (select * from t1 a)
     --------------------------------------------------------------------------------
    -SELECT `gen_attr` AS `a` FROM (SELECT `gen_attr` FROM (SELECT `a` AS `gen_attr` FROM `default`.`t1`) AS gen_subquery_0 WHERE EXISTS(SELECT `gen_attr` AS `a` FROM ((SELECT `gen_attr` FROM (SELECT `a` AS `gen_attr` FROM `default`.`t1`) AS gen_subquery_0) AS gen_subquery_1) AS gen_subquery_1)) AS b
    +SELECT `gen_attr_0` AS `a` FROM (SELECT `gen_attr_0` FROM (SELECT `a` AS `gen_attr_0` FROM `default`.`t1`) AS gen_subquery_0 WHERE EXISTS(SELECT `gen_attr_1` AS `a` FROM ((SELECT `gen_attr_1` FROM (SELECT `a` AS `gen_attr_1` FROM `default`.`t1`) AS gen_subquery_2) AS gen_subquery_1) AS gen_subquery_1)) AS b
    --- End diff --
    
    `gen_subquery_0` and `gen_subquery_1` are not repeated now.


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