zzwqqq commented on code in PR #4748:
URL: https://github.com/apache/calcite/pull/4748#discussion_r2697643961
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core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java:
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@@ -2242,12 +2243,37 @@ public SqlSelect asSelect() {
if (node instanceof SqlSelect) {
return (SqlSelect) node;
}
- if (!dialect.hasImplicitTableAlias()) {
+ if (!dialect.hasImplicitTableAlias() || hasConflictTableAlias(node)) {
return wrapSelect(asFrom());
}
return wrapSelect(node);
}
+ private boolean hasConflictTableAlias(SqlNode node) {
+ if (!(node instanceof SqlIdentifier)) {
+ return false;
+ }
+ if (correlTableMap.isEmpty()) {
Review Comment:
I think the conflict occurs when there access correlate tables. At this
point, the `correlTableMap` can be used to check.
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