kennknowles commented on a change in pull request #14015:
URL: https://github.com/apache/beam/pull/14015#discussion_r578759303
##########
File path:
sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/ZetaSQLQueryPlanner.java
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@@ -160,8 +165,10 @@ static boolean hasOnlyJavaUdfInProjects(RelOptRuleCall x) {
SqlUserDefinedFunction udf = (SqlUserDefinedFunction) call.op;
if (udf.function instanceof ZetaSqlScalarFunctionImpl) {
ZetaSqlScalarFunctionImpl scalarFunction =
(ZetaSqlScalarFunctionImpl) udf.function;
- if (!scalarFunction.functionGroup.equals(
+ if (scalarFunction.functionGroup.equals(
SqlAnalyzer.USER_DEFINED_JAVA_SCALAR_FUNCTIONS)) {
+ udfs.add(i);
+ } else {
Review comment:
However, it would be a normal approach to low-level code (like the
`Program` object) to use SSA so that there is no nested expression. I just
don't know what Calcite guarantees.
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