Github user maryannxue commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/213#discussion_r81418958
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/calcite/rel/PhoenixLimit.java ---
@@ -76,20 +76,27 @@ public RelOptCost computeSelfCost(RelOptPlanner
planner, RelMetadataQuery mq) {
@Override
public double estimateRowCount(RelMetadataQuery mq) {
- double rows = super.estimateRowCount(mq);
+ double rows = super.estimateRowCount(mq);
+ if(offset != null) {
+ return Math.max(0, Math.min(RexLiteral.intValue(fetch), rows -
RexLiteral.intValue(offset)));
+ }
return Math.min(RexLiteral.intValue(fetch), rows);
}
@Override
public QueryPlan implement(PhoenixRelImplementor implementor) {
QueryPlan plan = implementor.visitInput(0, (PhoenixQueryRel)
getInput());
int fetchValue = RexLiteral.intValue(fetch);
+ int offsetValue = 0;
+ if (offset != null){
+ offsetValue = RexLiteral.intValue(offset);
+ }
if (plan.getLimit() == null) {
--- End diff --
should be "if (plan.getLimit() == null && plan.getOffset() == null)"
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