pengzhiwei2018 commented on a change in pull request #1138: [CALCITE-1581] UDTF
like in hive
URL: https://github.com/apache/calcite/pull/1138#discussion_r315055847
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File path: core/src/main/java/org/apache/calcite/sql/SqlAsOperator.java
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@@ -102,12 +103,26 @@ public void validateCall(
// we don't want to validate the identifier.
final List<SqlNode> operands = call.getOperandList();
assert operands.size() == 2;
- assert operands.get(1) instanceof SqlIdentifier;
operands.get(0).validateExpr(validator, scope);
- SqlIdentifier id = (SqlIdentifier) operands.get(1);
- if (!id.isSimple()) {
- throw validator.newValidationError(id,
- RESOURCE.aliasMustBeSimpleIdentifier());
+
+ SqlNode asIdentifier = operands.get(1);
+ assert asIdentifier instanceof SqlIdentifier
+ || (asIdentifier instanceof SqlNodeList
+ && validator.getConformance().allowSelectTableFunction());
+
Review comment:
There is a check for this in the Parser.jj, So this should not happen here.
I use the `assert` but not the `exception`.
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