danny0405 commented on code in PR #2844:
URL: https://github.com/apache/calcite/pull/2844#discussion_r913747288
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core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java:
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@@ -1371,13 +1373,153 @@ private void substituteSubQuery(Blackboard bb,
SubQuery subQuery) {
//
bb.cursors.add(converted.r);
return;
-
+ case SET_SEMANTICS_TABLE:
+ if (!config.isExpand()) {
+ return;
+ }
+ substituteSubQueryOfSetSemanticsInputTable(bb, subQuery);
+ return;
default:
throw new AssertionError("unexpected kind of sub-query: "
+ subQuery.node);
}
}
+ private void substituteSubQueryOfSetSemanticsInputTable(
+ Blackboard bb,
+ SubQuery subQuery) {
+ SqlBasicCall call;
+ SqlNode query;
+ call = (SqlBasicCall) subQuery.node;
+ query = call.operand(0);
+ final SqlValidatorScope innerTableScope =
+ (query instanceof SqlSelect)
+ ? validator().getSelectScope((SqlSelect) query)
+ : null;
+ final Blackboard setSemanticsTableBb = createBlackboard(
+ innerTableScope, null, false);
+ final RelNode inputOfSetSemanticsTable = convertQueryRecursive(
Review Comment:
What is the semantics to create black board with null scope ?
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