liyafan82 commented on a change in pull request #2124:
URL: https://github.com/apache/calcite/pull/2124#discussion_r480031532
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File path: core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java
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@@ -737,25 +745,24 @@ public SqlNode toSql(RexProgram program, RexNode rex) {
return new SqlDynamicParam(caseParam.getIndex(), POS);
case IN:
- if (rex instanceof RexSubQuery) {
- subQuery = (RexSubQuery) rex;
- sqlSubQuery =
- implementor().visitRoot(subQuery.rel).asQueryOrValues();
- final List<RexNode> operands = subQuery.operands;
- SqlNode op0;
- if (operands.size() == 1) {
- op0 = toSql(program, operands.get(0));
- } else {
- final List<SqlNode> cols = toSql(program, operands);
- op0 = new SqlNodeList(cols, POS);
- }
- return subQuery.getOperator().createCall(POS, op0, sqlSubQuery);
+ subQuery = (RexSubQuery) rex;
Review comment:
For scenarios which is not a in-sub-query, this may cause a
ClassCastException?
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