ibzib commented on a change in pull request #16200:
URL: https://github.com/apache/beam/pull/16200#discussion_r782626754
##########
File path:
sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/translation/AggregateScanConverter.java
##########
@@ -240,18 +244,22 @@ private AggregateCall convertAggCall(
}
List<Integer> argList = new ArrayList<>();
- for (ResolvedExpr expr :
- ((ResolvedAggregateFunctionCall)
computedColumn.getExpr()).getArgumentList()) {
+ ResolvedAggregateFunctionCall expr = ((ResolvedAggregateFunctionCall)
computedColumn.getExpr());
+ List<ZetaSQLResolvedNodeKind.ResolvedNodeKind> resolvedNodeKinds =
+ Arrays.asList(RESOLVED_CAST, RESOLVED_COLUMN_REF,
RESOLVED_GET_STRUCT_FIELD);
+ for (int i = 0; i < expr.getArgumentList().size(); i++) {
// Throw an error if aggregate function's input isn't either a ColumnRef
or a cast(ColumnRef).
// TODO: is there a general way to handle aggregation calls conversion?
- if (expr.nodeKind() == RESOLVED_CAST
- || expr.nodeKind() == RESOLVED_COLUMN_REF
- || expr.nodeKind() == RESOLVED_GET_STRUCT_FIELD) {
+ ZetaSQLResolvedNodeKind.ResolvedNodeKind resolvedNodeKind =
+ expr.getArgumentList().get(i).nodeKind();
+ if (i == 0 && resolvedNodeKinds.contains(resolvedNodeKind)) {
Review comment:
What was the other exception? Also, do you think it would be possible to
support literals as the first argument? I'm not sure why that limitation
exists.
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