Yuming Wang created SPARK-33315:
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Summary: simplify CaseWhen with EqualTo
Key: SPARK-33315
URL: https://issues.apache.org/jira/browse/SPARK-33315
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.1.0
Reporter: Yuming Wang
{code:sql}
create table t(a int, b int, c int) using parquet;
SELECT *
FROM (SELECT CASE
WHEN a = 100 THEN 1
WHEN b > 1000 THEN 2
WHEN c IS NOT NULL THEN 3
END AS x
FROM t) tmp
WHERE x = 2
{code}
{noformat}
Before this PR:
Filter (CASE WHEN (a#1 = 100) THEN 1 WHEN (b#2 > 1000) THEN 2 WHEN
isnotnull(c#3) THEN 3 END = 2)
After this PR:
Filter (b#2 > 1000)
{noformat}
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