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MDEV-13134 Introduce ALTER TABLE attributes ALGORITHM=NOCOPY and ALGORITHM=INSTANT

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Introduced new alter algorithm type called NOCOPY & INSTANT for
inplace alter operation.

NOCOPY - Algorithm refuses any alter operation that would
rebuild the clustered index. It is a subset of INPLACE algorithm.

INSTANT - Algorithm allow any alter operation that would
modify only meta data. It is a subset of NOCOPY algorithm.

Introduce new variable called alter_algorithm. The values are
DEFAULT(0), COPY(1), INPLACE(2), NOCOPY(3), INSTANT(4)

Message to deprecate old_alter_table variable and make it alias
for alter_algorithm variable.

alter_algorithm variable for slave is always set to default.
This commit is contained in:
Thirunarayanan Balathandayuthapani
2018-05-07 14:54:58 +05:30
parent a0bc3b7eee
commit 85cc6b70bd
44 changed files with 1337 additions and 342 deletions
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2
sql/rpl_parallel.cc
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@ -1036,6 +1036,8 @@ handle_rpl_parallel_thread(void *arg)
thd->system_thread= SYSTEM_THREAD_SLAVE_SQL;
thd->security_ctx->skip_grants();
thd->variables.max_allowed_packet= slave_max_allowed_packet;
/* Ensure that slave can exeute any alter table it gets from master */
thd->variables.alter_algorithm= (ulong) Alter_info::ALTER_TABLE_ALGORITHM_DEFAULT;
thd->slave_thread= 1;
set_slave_thread_options(thd);