JackieTien97 commented on code in PR #17053:
URL: https://github.com/apache/iotdb/pull/17053#discussion_r2710577932
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iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/analyzer/predicate/ConvertPredicateToFilterVisitor.java:
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@@ -371,6 +373,14 @@ protected Filter visitIsNullPredicate(IsNullPredicate
node, Context context) {
throw new IllegalArgumentException("IS NULL cannot be pushed down");
}
+ @Override
+ protected Filter visitCast(Cast node, Context context) {
+ if (node.getExpression() instanceof NullLiteral) {
+ return new FalseLiteralFilter();
+ }
+ return process(node.getExpression(), context);
+ }
Review Comment:
not right, what if I write CAST(NULL AS BOOLEAM) IS NULL ?
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