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MDEV-36896 - Assertion `marked_for_read()' failed in virtual String *Field_varstring::val_str(String *, String *) #5158

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MDEV-36896 - Assertion `marked_for_read()' failed in virtual String *Field_varstring::val_str(String *, String *) #5158

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6 changes: 6 additions & 0 deletions mysql-test/suite/vcol/r/vcol_misc.result
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Original file line number Diff line number Diff line change
Expand Up @@ -591,3 +591,9 @@ DROP TABLE t;
#
# End of 10.5 tests
#
SET tx_isolation='READ-UNCOMMITTED';
CREATE TABLE t (a VARCHAR(10),b INT,c CHAR(10) GENERATED ALWAYS AS (a) VIRTUAL,KEY(b,c)) ENGINE=InnoDB;
INSERT INTO t (a) VALUES ('A');
SELECT * FROM t WHERE b IS NULL ORDER BY a;
a b c
A NULL A
10 changes: 10 additions & 0 deletions mysql-test/suite/vcol/t/vcol_misc.test
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@@ -1,5 +1,6 @@
--source include/have_ucs2.inc
--source include/have_debug.inc
--source include/have_innodb.inc

let $MYSQLD_DATADIR= `select @@datadir`;

Expand Down Expand Up @@ -560,3 +561,12 @@ DROP TABLE t;
--echo #
--echo # End of 10.5 tests
--echo #

#
# MDEV-36896 Assertion `marked_for_read()' failed in virtual String *Field_varstring::val_str(String *, String *)
#

SET tx_isolation='READ-UNCOMMITTED';
CREATE TABLE t (a VARCHAR(10),b INT,c CHAR(10) GENERATED ALWAYS AS (a) VIRTUAL,KEY(b,c)) ENGINE=InnoDB;
INSERT INTO t (a) VALUES ('A');
SELECT * FROM t WHERE b IS NULL ORDER BY a;
1 change: 0 additions & 1 deletion sql/table.cc
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Expand Up @@ -9187,7 +9187,6 @@ int TABLE::update_virtual_field(Field *vf, bool ignore_warnings)
TABLE::update_virtual_fields(handler *, enum_vcol_update_mode).
*/
in_use->set_n_backup_active_arena(expr_arena, &backup_arena);
bitmap_clear_all(&tmp_set);
vf->vcol_info->expr->walk(&Item::update_vcol_processor, 0, &tmp_set);
DBUG_FIX_WRITE_SET(vf);
vf->vcol_info->expr->save_in_field(vf, 0);
Expand Down