public Void visit(SqlCall call) {
final SqlOperator operator = call.getOperator();
if (operator.isAggregator()) {
throw new Util.FoundOne(call);
}
// User-defined function may not be resolved yet.
if (operator instanceof SqlFunction
&& ((SqlFunction) operator).getFunctionType()
== SqlFunctionCategory.USER_DEFINED_FUNCTION) {
final List<SqlOperator> list = Lists.newArrayList();
opTab.lookupOperatorOverloads(
((SqlFunction) operator).getSqlIdentifier(),
SqlFunctionCategory.USER_DEFINED_FUNCTION,
SqlSyntax.FUNCTION,
list);
for (SqlOperator sqlOperator : list) {
if (sqlOperator.isAggregator()) {
throw new Util.FoundOne(call);
}
}
}
if (call.isA(SqlKind.QUERY)) {
// don't traverse into queries
return null;
}
if (call.getKind() == SqlKind.OVER) {
if (over) {
throw new Util.FoundOne(call);
} else {
// an aggregate function over a window is not an aggregate!
return null;
}
}
return super.visit(call);
}
public Void visit(SqlCall call) {
final SqlOperator operator = call.getOperator();
if (operator == SqlStdOperatorTable.andOperator) {
throw new Found();
}
return super.visit(call);
}