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MDEV-18712 InnoDB indexes are inconsistent with what defined in .frm for table after rebuilding table with index on blob

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when auto-adding a virtual LONG_UNIQUE_HASH_FIELD, fill in
a Virtual_column_info for it, so that fill_alter_inplace_info()
would know we're adding a virtual field (ALTER_ADD_VIRTUAL_COLUMN).
This commit is contained in:
Sergei Golubchik
2019-02-27 03:36:37 +01:00
parent 5adf11250a
commit 20c89f9f37
4 changed files with 24 additions and 1 deletions
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10
mysql-test/main/long_unique_bugs.result
View File

@ -10,3 +10,13 @@ create temporary table tmp (a varchar(1024), b int, c int, d int, e linestring,
load data infile 'load.data' into table tmp;
delete from tmp;
drop table t1;
create table t1 (b blob) engine=innodb;
alter table t1 add unique (b);
alter table t1 force;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`b` blob DEFAULT NULL,
UNIQUE KEY `b` (`b`) USING HASH
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t1;

11
mysql-test/main/long_unique_bugs.test
View File

@ -1,3 +1,5 @@
--source include/have_innodb.inc
#
# MDEV-18707 Server crash in my_hash_sort_bin, ASAN heap-use-after-free in Field::is_null, server hang, corrupted double-linked list
#
@ -15,3 +17,12 @@ delete from tmp;
drop table t1;
--let $datadir= `SELECT @@datadir`
--remove_file $datadir/test/load.data
#
# MDEV-18712 InnoDB indexes are inconsistent with what defined in .frm for table after rebuilding table with index on blob
#
create table t1 (b blob) engine=innodb;
alter table t1 add unique (b);
alter table t1 force;
show create table t1;
drop table t1;

2
sql/sql_table.cc
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@ -3321,6 +3321,8 @@ static Create_field * add_hash_field(THD * thd, List<Create_field> *create_list,
cf->length= cf->char_length= cf->pack_length= HA_HASH_FIELD_LENGTH;
cf->invisible= INVISIBLE_FULL;
cf->pack_flag|= FIELDFLAG_MAYBE_NULL;
cf->vcol_info= new (thd->mem_root) Virtual_column_info();
cf->vcol_info->stored_in_db= false;
uint num= 1;
LEX_CSTRING field_name;
field_name.str= (char *)thd->alloc(LONG_HASH_FIELD_NAME_LENGTH);

2
sql/unireg.cc
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@ -691,7 +691,7 @@ static bool pack_vcols(String *buf, List<Create_field> &create_fields,
for (uint field_nr=0; (field= it++); field_nr++)
{
if (field->vcol_info)
if (field->vcol_info && field->vcol_info->expr)
if (pack_expression(buf, field->vcol_info, field_nr,
field->vcol_info->stored_in_db
? VCOL_GENERATED_STORED : VCOL_GENERATED_VIRTUAL))