Yuming Wang created SPARK-33847:
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Summary: Replace None of elseValue inside CaseWhen if all branches
are FalseLiteral
Key: SPARK-33847
URL: https://issues.apache.org/jira/browse/SPARK-33847
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.2.0
Reporter: Yuming Wang
{code:scala}
spark.sql("create table t1 using parquet as select id from range(10)")
spark.sql("select id from t1 where (CASE WHEN id = 1 THEN 'a' WHEN id = 3
THEN 'b' end) = 'c' ").explain()
{code}
Before:
{noformat}
== Physical Plan ==
*(1) Filter CASE WHEN (id#1L = 1) THEN false WHEN (id#1L = 3) THEN false END
+- *(1) ColumnarToRow
+- FileScan parquet default.t1[id#1L] Batched: true, DataFilters: [CASE WHEN
(id#1L = 1) THEN false WHEN (id#1L = 3) THEN false END], Format: Parquet,
Location:
InMemoryFileIndex[file:/Users/yumwang/opensource/spark/spark-warehouse/org.apache.spark.sql.DataF...,
PartitionFilters: [], PushedFilters: [], ReadSchema: struct<id:bigint>
{noformat}
After:
{noformat}
== Physical Plan ==
LocalTableScan <empty>, [id#1L]
{noformat}
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