planner: add new rules to transfer into dual table

Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
pingcap · Jan 7, 2025 · 74a9df1 · 74a9df1
1 parent d8375dd
commit 74a9df1
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/pkg/planner/cardinality/row_count_index.go b/pkg/planner/cardinality/row_count_index.go
@@ -239,7 +239,10 @@ func getIndexRowCountForStatsV2(sctx planctx.PlanContext, idx *statistics.Index,
 		if debugTrace {
 			debugTraceStartEstimateRange(sctx, indexRange, lb, rb, totalCount)
 		}
-		isMysqlTime := indexRange.LowVal[0].Kind() == types.KindMysqlTime && indexRange.HighVal[0].Kind() == types.KindMysqlTime
+		isMysqlTime := indexRange.LowVal[0].Kind() == types.KindMysqlTime &&
+			indexRange.HighVal[0].Kind() == types.KindMysqlTime &&
+			len(indexRange.LowVal) == len(indexRange.HighVal) &&
+			len(indexRange.LowVal) == 1
 		fullLen := len(indexRange.LowVal) == len(indexRange.HighVal) && len(indexRange.LowVal) == len(idx.Info.Columns)
 		if bytes.Equal(lb, rb) {
 			// case 1: it's a point