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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/sql_class.h
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@ -632,6 +632,7 @@ typedef struct system_variables
ulong query_cache_type;
ulong tx_isolation;
ulong updatable_views_with_limit;
ulong alter_algorithm;
int max_user_connections;
ulong server_id;
/**
@ -655,7 +656,6 @@ typedef struct system_variables
my_bool keep_files_on_create;
my_bool old_mode;
my_bool old_alter_table;
my_bool old_passwords;
my_bool big_tables;
my_bool only_standard_compliant_cte;