panbingkun commented on code in PR #47754:
URL: https://github.com/apache/spark/pull/47754#discussion_r1723148415
##########
sql/core/src/test/scala/org/apache/spark/sql/scripting/SqlScriptingInterpreterSuite.scala:
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@@ -389,25 +389,44 @@ class SqlScriptingInterpreterSuite extends QueryTest with
SharedSparkSession {
}
test("if's condition must return a single row data") {
- withTable("t") {
- val commands =
+ withTable("t1", "t2") {
+ // empty row
+ val commands1 =
+ """
+ |BEGIN
+ | CREATE TABLE t1 (a BOOLEAN) USING parquet;
+ | IF (SELECT * FROM t1) THEN
Review Comment:
Its `SparkPlan` is like follows:
<img width="915" alt="image"
src="https://github.com/user-attachments/assets/c41edbc2-f80e-4ac4-b00b-efb4907ace3a";>
- `ScalarSubquery` return `null`
https://github.com/apache/spark/blob/bf3ad7e94afb5416d995dc22344566899ee7c4b0/sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala#L93
- `ProjectExec` return `Row(null)`
https://github.com/apache/spark/blob/899fad4710bef174684deee64314ac483c16c494/sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala#L70-L77
<img width="1054" alt="image"
src="https://github.com/user-attachments/assets/dada8d92-9188-4dfd-9456-5fbc6bffa107";>
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