MDEV-29753 An error is wrongly reported during INSERT with vcol index

See also commits aa8a31da and 64678c for a Bug #22990029 fix.

In this scenario INSERT chose to check if delete unmarking is available for
a just deleted record. To build an update vector, it needed to calculate
the vcols as well. Since this INSERT was not IGNORE-flagged, recalculation
failed.

Solutiuon: temporarily set abort_on_warning=true, while calculating the
column for delete-unmarked insert.

mysql-test/suite/gcol/r/innodb_virtual_index.result

@@ -249,12 +249,15 @@ ENGINE=InnoDB;
 INSERT IGNORE INTO t1 (a,b) VALUES(1,20190132);
 Warnings:
 Warning	1265	Data truncated for column 'vb' at row 1
+SELECT * FROM t1;
+a	b	vb
+1	20190132	0000-00-00
 BEGIN;
 DELETE FROM t1;
 INSERT INTO t1 (a,b) VALUES(1,20190123);
-ERROR 22007: Incorrect date value: '20190132' for column `test`.`t1`.`vb` at row 1
 SELECT * FROM t1;
 a	b	vb
+1	20190123	2019-01-23
 ROLLBACK;
 SELECT * FROM t1;
 a	b	vb
@@ -340,4 +343,33 @@ Warnings:
 Warning	1365	Division by 0
 disconnect stop_purge;
 DROP TABLE t, t_odd;
+#
+# MDEV-29753 An error is wrongly reported during INSERT with vcol index
+# See also Bug #22990029
+#
+CREATE TABLE t(pk INT PRIMARY KEY,
+fld1 INT NOT NULL,
+fld2 INT AS (100/fld1) VIRTUAL,
+KEY(fld1), KEY(fld2));
+INSERT IGNORE t(pk, fld1) VALUES(1, 0);
+Warnings:
+Warning	1365	Division by 0
+SELECT * FROM t;
+pk	fld1	fld2
+1	0	NULL
+Warnings:
+Warning	1365	Division by 0
+BEGIN;
+DELETE FROM t;
+Warnings:
+Warning	1365	Division by 0
+Warning	1365	Division by 0
+Warning	1365	Division by 0
+INSERT INTO t (pk, fld1) VALUES(1,1);
+SELECT * FROM t;
+pk	fld1	fld2
+1	1	100
+# Cleanup
+ROLLBACK;
+DROP TABLE t;
 # End of 10.3 tests

mysql-test/suite/gcol/t/innodb_virtual_index.test

@@ -275,9 +275,9 @@ DROP TABLE t1;
 CREATE TABLE t1(a INT PRIMARY KEY, b INT, vb DATE AS(b) VIRTUAL, KEY(vb))
 ENGINE=InnoDB;
 INSERT IGNORE INTO t1 (a,b) VALUES(1,20190132);
+SELECT * FROM t1;
 BEGIN;
 DELETE FROM t1;
---error ER_TRUNCATED_WRONG_VALUE
 INSERT INTO t1 (a,b) VALUES(1,20190123);
 SELECT * FROM t1;
 ROLLBACK;
@@ -361,5 +361,24 @@ SELECT fld2 FROM t FORCE INDEX(fld1);
 --disconnect stop_purge
 DROP TABLE t, t_odd;
 
+--echo #
+--echo # MDEV-29753 An error is wrongly reported during INSERT with vcol index
+--echo # See also Bug #22990029
+--echo #
+
+CREATE TABLE t(pk INT PRIMARY KEY,
+               fld1 INT NOT NULL,
+               fld2 INT AS (100/fld1) VIRTUAL,
+               KEY(fld1), KEY(fld2));
+INSERT IGNORE t(pk, fld1) VALUES(1, 0);
+SELECT * FROM t;
+BEGIN;
+DELETE FROM t;
+INSERT INTO t (pk, fld1) VALUES(1,1);
+SELECT * FROM t;
+
+--echo # Cleanup
+ROLLBACK;
+DROP TABLE t;
 
 --echo # End of 10.3 tests

sql/table.cc

@@ -8158,9 +8158,10 @@ int TABLE::update_virtual_fields(handler *h, enum_vcol_update_mode update_mode)
 /*
   Calculate the virtual field value for a specified field.
   @param vf                     A field to calculate
-  @param ignore_warnings        Ignore calculation warnings. This usually
+  @param ignore_warnings        Ignore the warnings and also make the
-                                means that a calculation is internal and is
+                                calculations permissive. This usually means
-                                not expected to fail.
+                                that a calculation is internal and is not
+                                expected to fail.
 */
 int TABLE::update_virtual_field(Field *vf, bool ignore_warnings)
 {
@@ -8169,8 +8170,13 @@ int TABLE::update_virtual_field(Field *vf, bool ignore_warnings)
   Counting_error_handler count_errors;
   Suppress_warnings_error_handler warning_handler;
   in_use->push_internal_handler(&count_errors);
+  bool abort_on_warning;
   if (ignore_warnings)
+  {
+    abort_on_warning= in_use->abort_on_warning;
+    in_use->abort_on_warning= false;
     in_use->push_internal_handler(&warning_handler);
+  }
   /*
     TODO: this may impose memory leak until table flush.
           See comment in
@@ -8183,7 +8189,12 @@ int TABLE::update_virtual_field(Field *vf, bool ignore_warnings)
   in_use->restore_active_arena(expr_arena, &backup_arena);
   in_use->pop_internal_handler();
   if (ignore_warnings)
+  {
+    in_use->abort_on_warning= abort_on_warning;
     in_use->pop_internal_handler();
+    // This is an internal calculation, we expect it to always succeed
+    DBUG_ASSERT(count_errors.errors == 0);
+  }
   DBUG_RETURN(count_errors.errors);
 }
 

storage/innobase/include/row0upd.h

@@ -215,6 +215,8 @@ the equal ordering fields. NOTE: we compare the fields as binary strings!
 @param[in]	offsets		rec_get_offsets(rec,index), or NULL
 @param[in]	no_sys		skip the system columns
 				DB_TRX_ID and DB_ROLL_PTR
+@param[in]	ignore_warnings ignore warnings during vcol calculation, which
+				means that this calculation is internal only
 @param[in]	trx		transaction (for diagnostics),
 				or NULL
 @param[in]	heap		memory heap from which allocated
@@ -230,11 +232,12 @@ row_upd_build_difference_binary(
 	const rec_t*	rec,
 	const rec_offs*	offsets,
 	bool		no_sys,
+	bool		ignore_warnings,
 	trx_t*		trx,
 	mem_heap_t*	heap,
 	TABLE*		mysql_table,
 	dberr_t*	error)
-	MY_ATTRIBUTE((nonnull(1,2,3,7,9), warn_unused_result));
+	MY_ATTRIBUTE((nonnull(1,2,3,8,10), warn_unused_result));
 /** Apply an update vector to an index entry.
 @param[in,out]	entry	index entry to be updated; the clustered index record
 			must be covered by a lock or a page latch to prevent

storage/innobase/row/row0ins.cc

@@ -307,7 +307,7 @@ row_ins_clust_index_entry_by_modify(
 	}
 
 	update = row_upd_build_difference_binary(
-		cursor->index, entry, rec, NULL, true,
+		cursor->index, entry, rec, NULL, true, true,
 		thr_get_trx(thr), heap, mysql_table, &err);
 	if (err != DB_SUCCESS) {
 		return(err);

storage/innobase/row/row0log.cc

@@ -2248,7 +2248,7 @@ func_exit_committed:
 		row, NULL, index, heap, ROW_BUILD_NORMAL);
 	upd_t*		update	= row_upd_build_difference_binary(
 		index, entry, btr_pcur_get_rec(&pcur), cur_offsets,
-		false, NULL, heap, dup->table, &error);
+		false, false, NULL, heap, dup->table, &error);
 	if (error != DB_SUCCESS) {
 		goto func_exit;
 	}

storage/innobase/row/row0upd.cc

@@ -1044,6 +1044,7 @@ row_upd_build_difference_binary(
 	const rec_t*	rec,
 	const rec_offs*	offsets,
 	bool		no_sys,
+	bool		ignore_warnings,
 	trx_t*		trx,
 	mem_heap_t*	heap,
 	TABLE*		mysql_table,
@@ -1153,7 +1154,7 @@ row_upd_build_difference_binary(
 			dfield_t*	vfield = innobase_get_computed_value(
 				update->old_vrow, col, index,
 				&vc.heap, heap, NULL, thd, mysql_table, record,
-				NULL, NULL);
+				NULL, NULL, ignore_warnings);
 			if (vfield == NULL) {
 				*error = DB_COMPUTE_VALUE_FAILED;
 				return(NULL);