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Fix wrong status code of case when #16042

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Merged
JackieTien97 merged 3 commits into from
Jul 31, 2025
Merged

Fix wrong status code of case when #16042

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5460a26
fix: Replace checkArgument with SemanticException for result type val…
FearfulTomcat27 Jul 27, 2025
55ba739
test: Add assertion for mixed result types in CASE expression
FearfulTomcat27 Jul 27, 2025
51a626a
fix: Use LinkedHashSet for result type collections in CASE expressions
FearfulTomcat27 Jul 30, 2025
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4 changes: 4 additions & 0 deletions ...ion-test/src/test/java/org/apache/iotdb/relational/it/db/it/IoTDBCaseWhenThenTableIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -159,6 +159,10 @@ public void testKind1OutputTypeRestrict() {
"select case when s1<=0 then true else 22 end from table1",
"701: All CASE results must be the same type or coercible to a common type. Cannot find common type between BOOLEAN and INT32, all types (without duplicates): [BOOLEAN, INT32]",
DATABASE);
tableAssertTestFail(
"select case when s1<=0 then 0 when s1>1 then null end from table1",
"701: All result types must be the same:",
DATABASE);

// TEXT and other types cannot exist at the same time
retArray = new String[] {"good,", "bad,", "okok,", "okok,"};
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11 changes: 9 additions & 2 deletions ...src/main/java/org/apache/iotdb/db/queryengine/plan/relational/planner/IrTypeAnalyzer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -241,7 +241,10 @@ protected Type visitSearchedCaseExpression(SearchedCaseExpression node, Context
})
.collect(Collectors.toSet());

checkArgument(resultTypes.size() == 1, "All result types must be the same: %s", resultTypes);
if (resultTypes.size() != 1) {
throw new SemanticException(
String.format("All result types must be the same: %s", resultTypes));
}
Type resultType = resultTypes.iterator().next();
node.getDefaultValue()
.ifPresent(
Expand Down Expand Up @@ -275,7 +278,11 @@ protected Type visitSimpleCaseExpression(SimpleCaseExpression node, Context cont
})
.collect(Collectors.toSet());

checkArgument(resultTypes.size() == 1, "All result types must be the same: %s", resultTypes);
if (resultTypes.size() != 1) {
throw new SemanticException(
String.format("All result types must be the same: %s", resultTypes));
}

Type resultType = resultTypes.iterator().next();
node.getDefaultValue()
.ifPresent(
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