MDEV-18879/MDEV-18972 Corrupted record inserted by FOREIGN KEY operation

row_ins_foreign_check_on_constraint(): When constructing
cascade->historical_row for tables WITH SYSTEM VERSIONING,
use the appropriate mode ROW_COPY_DATA, because the pointers
will be stale after mtr_commit() is invoked.

mysql-test/suite/versioning/r/foreign.result

@@ -299,3 +299,91 @@ UPDATE t2 SET f2= 2;
 ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`))
 DELETE FROM t2;
 DROP TABLE t2, t1;
+#
+# MDEV-18879 Corrupted record inserted by FOREIGN KEY operation
+#
+SET timestamp = 1;
+SET time_zone='+02:00';
+SELECT now();
+now()
+1970-01-01 02:00:01
+CREATE TABLE t1 (
+pk INT UNSIGNED PRIMARY KEY,
+f1 varchar(255)  CHARACTER SET ucs2,
+f2 longtext CHARACTER SET ucs2,
+f3 varchar(255),
+f4 char(255),
+f5 longtext CHARACTER SET ucs2,
+f6 INT UNSIGNED,
+f7 INT UNSIGNED,
+f8 INT UNSIGNED,
+f9 INT UNSIGNED,
+f10 INT UNSIGNED,
+f11 INT UNSIGNED,
+f12 varchar(255) CHARACTER SET ucs2,
+f13 char(255)  CHARACTER SET ucs2,
+f14 char(255) CHARACTER SET ucs2,
+f15 varchar(255),
+f16 longtext,
+f17 char(255)
+) ENGINE=InnoDB WITH SYSTEM VERSIONING;
+INSERT INTO t1 VALUES
+(1, 'a', 'e', 'f', 'a', 'generate', 1, 2, 3, 4, 5, 6, 'main', 'against', 'b', 'u', 'explode', 'tomorrow'),
+(2, REPEAT('a',127), 'f', 'k', 'game', 'g', 2, 3, 4, 5, 6, 7, REPEAT('o',222), 'oven', 'flower', REPEAT('r',120), 'l', 'g'),
+(3, 'weekly', 'x', 'v', 'r', 'c', 3, 4, 5, 6, 7, 8, 'validity', 'y', 'h', 'oxygen', 'venture', 'uncertainty'),
+(4, 'r', 't', REPEAT('b',153), 'modern', 'h', 4, 5, 6, 7, 8, 9, REPEAT('g',128), 'a', 'w', 'f', 'b', 'b'),
+(5, 'h', 'y', REPEAT('v',107), 'knife', 'profession', 5, 6, 7, 8, 9, 0, 'infection', 'u', 'likelihood', REPEAT('n',149), 'folk', 'd'),
+(6, 'g', 'violent', REPEAT('o',28), 'capital', 'p', 6, 7, 8, 9, 0, 1, 'w', 'patron', 'd', 'y', 'originally', 'k'),
+(7, 'k', 'uncomfortable', REPEAT('v',248), 'y', 'link', 7, 8, 9, 0, 1, 2, REPEAT('j',204), 'j', 'statute', 'emphasis', 'u', 'water'),
+(8, 'preparation', 'water', 'suck', 'silver', 'a', 8, 9, 0, 1, 2, 3, 'h', 'q', 'o', 't', 'k', 'y'),
+(9, 'y', 'f', 'e', 'a', 'dawn', 9, 0, 1, 2, 3, 4, 'peak', 'parking', 'b', 't', 'timber', 'c'),
+(10, REPEAT('h',78), 'apologize', 'direct', 'u', 'frankly', 0, 1, 2, 3, 4, 5, 'h', 'exhibit', 'f', 'd', 'effective', 'c'),
+(11, 'i', 'h', 'a', 'y', 'u', 1, 2, 3, 4, 5, 6, 'l', 'b', 'm', 'respond', 'ideological', 'credibility');
+CREATE TABLE t2 (
+pk int primary key,
+f char(255) CHARACTER SET ucs2,
+key(f)
+) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1,'against'),(2,'q');
+SET SQL_MODE= '';
+SET timestamp = 2;
+SELECT * FROM t1 INTO OUTFILE 't1.data';
+SET timestamp = 3;
+UPDATE t1 SET f13 = 'q';
+SET timestamp = 4;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+Warnings:
+Warning	1265	Data truncated for column 'f12' at row 2
+Warning	1265	Data truncated for column 'f12' at row 4
+Warning	1265	Data truncated for column 'f12' at row 7
+SELECT * FROM t1 INTO OUTFILE 't1.data.2' ;
+SET timestamp = 5;
+LOAD DATA INFILE 't1.data.2' REPLACE INTO TABLE t1;
+Warnings:
+Warning	1265	Data truncated for column 'f1' at row 2
+Warning	1265	Data truncated for column 'f12' at row 2
+Warning	1265	Data truncated for column 'f12' at row 4
+Warning	1265	Data truncated for column 'f12' at row 7
+Warning	1265	Data truncated for column 'f1' at row 10
+SELECT * FROM t2 INTO OUTFILE 't2.data';
+SET timestamp = 6;
+LOAD DATA INFILE 't2.data' REPLACE INTO TABLE t2;
+SET FOREIGN_KEY_CHECKS = OFF;
+ALTER TABLE t1 ADD FOREIGN KEY (f13) REFERENCES t2 (f) ON DELETE SET NULL;
+SET timestamp = 7;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+Warnings:
+Warning	1265	Data truncated for column 'f12' at row 2
+Warning	1265	Data truncated for column 'f12' at row 4
+Warning	1265	Data truncated for column 'f12' at row 7
+SET FOREIGN_KEY_CHECKS = ON;
+SET SESSION SQL_MODE= 'NO_BACKSLASH_ESCAPES';
+SET timestamp = 8;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+Warnings:
+Warning	1265	Data truncated for column 'f12' at row 2
+Warning	1265	Data truncated for column 'f12' at row 4
+Warning	1265	Data truncated for column 'f12' at row 7
+SET timestamp = 9;
+REPLACE INTO t2 SELECT * FROM t2;
+DROP TABLE t1, t2;

mysql-test/suite/versioning/t/foreign.test

@@ -330,5 +330,84 @@ DELETE FROM t2;
 
 DROP TABLE t2, t1;
 
+--echo #
+--echo # MDEV-18879 Corrupted record inserted by FOREIGN KEY operation
+--echo #
+SET timestamp = 1;
+SET time_zone='+02:00';
+SELECT now();
+CREATE TABLE t1 (
+  pk INT UNSIGNED PRIMARY KEY,
+  f1 varchar(255)  CHARACTER SET ucs2,
+  f2 longtext CHARACTER SET ucs2,
+  f3 varchar(255),
+  f4 char(255),
+  f5 longtext CHARACTER SET ucs2,
+  f6 INT UNSIGNED,
+  f7 INT UNSIGNED,
+  f8 INT UNSIGNED,
+  f9 INT UNSIGNED,
+  f10 INT UNSIGNED,
+  f11 INT UNSIGNED,
+  f12 varchar(255) CHARACTER SET ucs2,
+  f13 char(255)  CHARACTER SET ucs2,
+  f14 char(255) CHARACTER SET ucs2,
+  f15 varchar(255),
+  f16 longtext,
+  f17 char(255)
+) ENGINE=InnoDB WITH SYSTEM VERSIONING;
+
+INSERT INTO t1 VALUES
+(1, 'a', 'e', 'f', 'a', 'generate', 1, 2, 3, 4, 5, 6, 'main', 'against', 'b', 'u', 'explode', 'tomorrow'),
+(2, REPEAT('a',127), 'f', 'k', 'game', 'g', 2, 3, 4, 5, 6, 7, REPEAT('o',222), 'oven', 'flower', REPEAT('r',120), 'l', 'g'),
+(3, 'weekly', 'x', 'v', 'r', 'c', 3, 4, 5, 6, 7, 8, 'validity', 'y', 'h', 'oxygen', 'venture', 'uncertainty'),
+(4, 'r', 't', REPEAT('b',153), 'modern', 'h', 4, 5, 6, 7, 8, 9, REPEAT('g',128), 'a', 'w', 'f', 'b', 'b'),
+(5, 'h', 'y', REPEAT('v',107), 'knife', 'profession', 5, 6, 7, 8, 9, 0, 'infection', 'u', 'likelihood', REPEAT('n',149), 'folk', 'd'),
+(6, 'g', 'violent', REPEAT('o',28), 'capital', 'p', 6, 7, 8, 9, 0, 1, 'w', 'patron', 'd', 'y', 'originally', 'k'),
+(7, 'k', 'uncomfortable', REPEAT('v',248), 'y', 'link', 7, 8, 9, 0, 1, 2, REPEAT('j',204), 'j', 'statute', 'emphasis', 'u', 'water'),
+(8, 'preparation', 'water', 'suck', 'silver', 'a', 8, 9, 0, 1, 2, 3, 'h', 'q', 'o', 't', 'k', 'y'),
+(9, 'y', 'f', 'e', 'a', 'dawn', 9, 0, 1, 2, 3, 4, 'peak', 'parking', 'b', 't', 'timber', 'c'),
+(10, REPEAT('h',78), 'apologize', 'direct', 'u', 'frankly', 0, 1, 2, 3, 4, 5, 'h', 'exhibit', 'f', 'd', 'effective', 'c'),
+(11, 'i', 'h', 'a', 'y', 'u', 1, 2, 3, 4, 5, 6, 'l', 'b', 'm', 'respond', 'ideological', 'credibility');
+
+CREATE TABLE t2 (
+  pk int primary key,
+  f char(255) CHARACTER SET ucs2,
+  key(f)
+) ENGINE=InnoDB;
+
+INSERT INTO t2 VALUES (1,'against'),(2,'q');
+
+SET SQL_MODE= '';
+SET timestamp = 2;
+SELECT * FROM t1 INTO OUTFILE 't1.data';
+SET timestamp = 3;
+UPDATE t1 SET f13 = 'q';
+SET timestamp = 4;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+SELECT * FROM t1 INTO OUTFILE 't1.data.2' ;
+SET timestamp = 5;
+LOAD DATA INFILE 't1.data.2' REPLACE INTO TABLE t1;
+SELECT * FROM t2 INTO OUTFILE 't2.data';
+SET timestamp = 6;
+LOAD DATA INFILE 't2.data' REPLACE INTO TABLE t2;
+SET FOREIGN_KEY_CHECKS = OFF;
+ALTER TABLE t1 ADD FOREIGN KEY (f13) REFERENCES t2 (f) ON DELETE SET NULL;
+SET timestamp = 7;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+SET FOREIGN_KEY_CHECKS = ON;
+
+SET SESSION SQL_MODE= 'NO_BACKSLASH_ESCAPES';
+SET timestamp = 8;
+LOAD DATA INFILE 't1.data' REPLACE INTO TABLE t1;
+SET timestamp = 9;
+REPLACE INTO t2 SELECT * FROM t2;
+
+# Cleanup
+DROP TABLE t1, t2;
+--let $datadir= `select @@datadir`
+--remove_file $datadir/test/t1.data
+--remove_file $datadir/test/t1.data.2
+--remove_file $datadir/test/t2.data
 
 --source suite/versioning/common_finish.inc

storage/innobase/row/row0ins.cc

@@ -1413,9 +1413,9 @@ row_ins_foreign_check_on_constraint(
 	if (table->versioned() && cascade->is_delete != PLAIN_DELETE
 	    && cascade->update->affects_versioned()) {
 		ut_ad(!cascade->historical_heap);
-		cascade->historical_heap = mem_heap_create(128);
+		cascade->historical_heap = mem_heap_create(srv_page_size);
 		cascade->historical_row = row_build(
-			ROW_COPY_POINTERS, clust_index, clust_rec, NULL, table,
+			ROW_COPY_DATA, clust_index, clust_rec, NULL, table,
 			NULL, NULL, NULL, cascade->historical_heap);
 	}