godfreyhe commented on a change in pull request #10315: [FLINK-14552][table]
Enable partition statistics in blink planner
URL: https://github.com/apache/flink/pull/10315#discussion_r352473315
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/rules/logical/PushPartitionIntoTableSourceScanRule.scala
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@@ -112,14 +124,16 @@ class PushPartitionIntoTableSourceScanRule extends
RelOptRule(
}
val statistic = tableSourceTable.getStatistic
- val newStatistic = if (remainingPartitions.size() == allPartitions.size())
{
- // Keep all Statistics if no predicates can be pushed down
- statistic
- } else if (statistic == FlinkStatistic.UNKNOWN) {
- statistic
- } else {
- // Remove tableStats after predicates pushed down
- FlinkStatistic.builder().statistic(statistic).tableStats(null).build()
+ val newStatistic = {
+ val tableStats = catalogOption match {
Review comment:
if no partitions are pruned and the original `TableStats` is not `UNKNOWN`,
we could use the original `TableStats` and avoid fetch all partitions'
statistics
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