planner: Fix issue 52198, HandleColOffset was wrong.

pkg/planner/core/find_best_task.go

@@ -2582,11 +2582,17 @@ func (ds *DataSource) convertToPointGet(prop *property.PhysicalProperty, candida
 		pointGetPlan.Handle = kv.IntHandle(candidate.path.Ranges[0].LowVal[0].GetInt64())
 		pointGetPlan.UnsignedHandle = mysql.HasUnsignedFlag(ds.handleCols.GetCol(0).RetType.GetFlag())
 		pointGetPlan.accessCols = ds.TblCols
-		hc, err := ds.handleCols.ResolveIndices(ds.schema)
-		if err != nil {
+		found := false
+		for i := range ds.Columns {
+			if ds.Columns[i].ID == ds.handleCols.GetCol(0).ID {
+				pointGetPlan.HandleColOffset = ds.Columns[i].Offset
+				found = true
+				break
+			}
+		}
+		if !found {
 			return invalidTask
 		}
-		pointGetPlan.HandleColOffset = hc.GetCol(0).Index
 		// Add filter condition to table plan now.
 		if len(candidate.path.TableFilters) > 0 {
 			sel := PhysicalSelection{

tests/integrationtest/r/executor/partition/issues.result

@@ -427,3 +427,9 @@ TableReader_7	1.00	root	partition:p0,p6	data:Selection_6
 select * from t where col_29 between -7 and -6;
 col_29
 -6
+create table issue52198 (a int, b int, primary key (b)) partition by hash(b) partitions 5;
+insert into issue52198 values (1,1);
+select space(1), b from issue52198 where b in (1);
+space(1)	b
+ 	1
+drop table issue52198;

tests/integrationtest/t/executor/partition/issues.test

@@ -337,3 +337,8 @@ explain select * from t where col_29 between -7 and -6;
 --sorted_result
 select * from t where col_29 between -7 and -6;
 
+# TestIssue52198
+create table issue52198 (a int, b int, primary key (b)) partition by hash(b) partitions 5;
+insert into issue52198 values (1,1);
+select space(1), b from issue52198 where b in (1);
+drop table issue52198;