davidm-db commented on code in PR #47672:
URL: https://github.com/apache/spark/pull/47672#discussion_r1739402808
##########
sql/core/src/test/scala/org/apache/spark/sql/scripting/SqlScriptingInterpreterSuite.scala:
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@@ -368,6 +368,238 @@ class SqlScriptingInterpreterSuite extends QueryTest with
SharedSparkSession {
}
}
+ test("searched case") {
+ val commands =
+ """
+ |BEGIN
+ | CASE
+ | WHEN 1 = 1 THEN
+ | SELECT 42;
+ | END CASE;
+ |END
+ |""".stripMargin
+ val expected = Seq(Seq(Row(42)))
+ verifySqlScriptResult(commands, expected)
+ }
+
+ test("searched case nested") {
+ val commands =
+ """
+ |BEGIN
+ | CASE
+ | WHEN 1=1 THEN
+ | CASE
+ | WHEN 2=1 THEN
+ | SELECT 41;
+ | ELSE
+ | SELECT 42;
+ | END CASE;
+ | END CASE;
+ |END
+ |""".stripMargin
+ val expected = Seq(Seq(Row(42)))
+ verifySqlScriptResult(commands, expected)
+ }
+
+ test("searched case second case") {
+ val commands =
+ """
+ |BEGIN
+ | CASE
+ | WHEN 1 = (SELECT 2) THEN
+ | SELECT 1;
+ | WHEN 2 = 2 THEN
+ | SELECT 42;
+ | WHEN (SELECT * FROM t) THEN
Review Comment:
@panbingkun to clarify a bit more, scripting works as following (really high
level):
- parsing the text and creating a `CompoundBody` logical plan at the root
- in leaf statements (`SingleStatement`) logical plans of each separate SQL
statement is saved
- interpreter iterates through the statements
- each leaf statement is executed based on the saved logical plan
it's really hard to do what you are asking, since `QueryExecution` (and thus
analyzer, optimizer, etc) are created and designed to work on the level of a
single query.
it would be too much to do what you suggested, but maybe sometime in the
future if we figure out there's a need and what's the proper way to do so...
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