dssysolyatin commented on code in PR #2929:
URL: https://github.com/apache/calcite/pull/2929#discussion_r1020099005
##########
core/src/main/java/org/apache/calcite/sql2rel/RelDecorrelator.java:
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@@ -1790,10 +1790,11 @@ private RexNode createCaseExpression(
@Override public RexNode visitLiteral(RexLiteral literal) {
// Use nullIndicator to decide whether to project null.
- // Do nothing if the literal is null.
+ // Do nothing if the literal is null or symbol.
if (!RexUtil.isNull(literal)
Review Comment:
Do I understand correctly that if I have query like:
```
SELECT (SELECT CARDINALITY(ARRAY[false, true, a.attidentity = 'a']) FROM
UNNEST(ARRAY[1]) as v) as options
FROM UNNEST(ARRAY['a', 'b']) AS a(attidentity);
```
RelDecorrelator will try to wrap true and false into case expression ?
Another question. why do we need to wrap literals into case expression at
all ?
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