This is an automated cherry-pick of #51862

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>

executor/insert_common.go

@@ -1097,6 +1097,28 @@ func (e *InsertValues) collectRuntimeStatsEnabled() bool {
 	return false
 }
 
+func (e *InsertValues) handleDuplicateKey(ctx context.Context, txn kv.Transaction, uk *keyValueWithDupInfo, replace bool, r toBeCheckedRow) (bool, error) {
+	if !replace {
+		e.Ctx().GetSessionVars().StmtCtx.AppendWarning(uk.dupErr)
+		if txnCtx := e.Ctx().GetSessionVars().TxnCtx; txnCtx.IsPessimistic && e.Ctx().GetSessionVars().LockUnchangedKeys {
+			txnCtx.AddUnchangedKeyForLock(uk.newKey)
+		}
+		return true, nil
+	}
+	_, handle, err := tables.FetchDuplicatedHandle(ctx, uk.newKey, true, txn, e.Table.Meta().ID, uk.commonHandle)
+	if err != nil {
+		return false, err
+	}
+	if handle == nil {
+		return false, nil
+	}
+	_, err = e.removeRow(ctx, txn, handle, r, true)
+	if err != nil {
+		return false, err
+	}
+	return false, nil
+}
+
 // batchCheckAndInsert checks rows with duplicate errors.
 // All duplicate rows will be ignored and appended as duplicate warnings.
 func (e *InsertValues) batchCheckAndInsert(ctx context.Context, rows [][]types.Datum,
@@ -1177,6 +1199,7 @@ func (e *InsertValues) batchCheckAndInsert(ctx context.Context, rows [][]types.D
 				return err
 			}
 		}
+<<<<<<< HEAD:executor/insert_common.go
 		skip := false
 		for _, uk := range r.uniqueKeys {
 			_, err := txn.Get(ctx, uk.newKey)
@@ -1211,8 +1234,45 @@ func (e *InsertValues) batchCheckAndInsert(ctx context.Context, rows [][]types.D
 					break
 				}
 			} else if !kv.IsErrNotFound(err) {
+=======
+
+		rowInserted := false
+		for _, uk := range r.uniqueKeys {
+			_, err := txn.Get(ctx, uk.newKey)
+			if err != nil && !kv.IsErrNotFound(err) {
+>>>>>>> fb64325ee52 (executor: handle the corner case that temp index is not exist but the normal index is exist (#51862)):pkg/executor/insert_common.go
 				return err
 			}
+			if err == nil {
+				rowInserted, err = e.handleDuplicateKey(ctx, txn, uk, replace, r)
+				if err != nil {
+					return err
+				}
+				if rowInserted {
+					break
+				}
+				continue
+			}
+			if tablecodec.IsTempIndexKey(uk.newKey) {
+				tablecodec.TempIndexKey2IndexKey(uk.newKey)
+				_, err = txn.Get(ctx, uk.newKey)
+				if err != nil && !kv.IsErrNotFound(err) {
+					return err
+				}
+				if err == nil {
+					rowInserted, err = e.handleDuplicateKey(ctx, txn, uk, replace, r)
+					if err != nil {
+						return err
+					}
+					if rowInserted {
+						break
+					}
+				}
+			}
+		}
+
+		if rowInserted {
+			continue
 		}
 
 		// If row was checked with no duplicate keys,