Github user hsuanyi commented on a diff in the pull request:
https://github.com/apache/drill/pull/397#discussion_r54956465
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillReduceAggregatesRule.java
---
@@ -100,8 +108,13 @@ public void onMatch(RelOptRuleCall ruleCall) {
*/
private boolean containsAvgStddevVarCall(List<AggregateCall>
aggCallList) {
for (AggregateCall call : aggCallList) {
- if (call.getAggregation() instanceof SqlAvgAggFunction
- || call.getAggregation() instanceof SqlSumAggFunction) {
+ SqlAggFunction sqlAggFunction = call.getAggregation();
+ if(sqlAggFunction instanceof DrillCalciteSqlWrapper) {
--- End diff --
The exception you might see is like this one:
Error: SYSTEM ERROR: AssertionError: Internal error: Conversion to
relational algebra failed to preserve datatypes:
validated type:
RecordType(DOUBLE NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(INTEGER NOT NULL EXPR$0) NOT NULL
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