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MDEV-19713 Remove big_tables system variable

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mark big_tables deprecated, the server can put temp tables on disk
as needed avoiding "table full" errors.

in case someone would really need to force a tmp table to be created
on disk from the start and for testing allow tmp_memory_table_size
to be set to 0.

fix tests to use that instead (and add a test that it actually
works).

make sure in-memory TREE size limit is never 0 (it's [ab]using
tmp_memory_table_size at the moment)

remove few sys_vars.*_basic tests
This commit is contained in:
Sergei Golubchik
2019-09-18 14:17:26 +02:00
parent de9ef03ae6
commit cd41ffe1f1
47 changed files with 453 additions and 1155 deletions
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16
mysql-test/main/variables.result
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@ -162,7 +162,6 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select @@IDENTITY AS `@@IDENTITY`,last_insert_id() AS `last_insert_id()`,@@identity AS `@@identity`
set big_tables=OFF, big_tables=ON, big_tables=0, big_tables=1, big_tables="OFF", big_tables="ON";
set global concurrent_insert=2;
show variables like 'concurrent_insert';
Variable_name Value
@ -422,18 +421,14 @@ SELECT @@version LIKE 'non-existent';
SELECT @@version_compile_os LIKE 'non-existent';
@@version_compile_os LIKE 'non-existent'
0
set big_tables=OFFF;
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
set big_tables="OFFF";
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
set unknown_variable=1;
ERROR HY000: Unknown system variable 'unknown_variable'
set max_join_size="hello";
ERROR 42000: Incorrect argument type to variable 'max_join_size'
set default_storage_engine=UNKNOWN_TABLE_TYPE;
ERROR 42000: Unknown storage engine 'UNKNOWN_TABLE_TYPE'
set default_storage_engine=MERGE, big_tables=2;
ERROR 42000: Variable 'big_tables' can't be set to the value of '2'
set default_storage_engine=MERGE, sql_warnings=NULL;
ERROR 42000: Variable 'sql_warnings' can't be set to the value of 'NULL'
show local variables like 'default_storage_engine';
Variable_name Value
default_storage_engine MEMORY
@ -456,10 +451,9 @@ ERROR HY000: Variable 'myisam_max_sort_file_size' is a GLOBAL variable and shoul
set @@SQL_WARNINGS=NULL;
ERROR 42000: Variable 'sql_warnings' can't be set to the value of 'NULL'
set autocommit=1;
set big_tables=1;
select @@autocommit, @@big_tables;
@@autocommit @@big_tables
1 1
select @@autocommit;
@@autocommit
1
set global binlog_cache_size=100;
Warnings:
Warning 1292 Truncated incorrect binlog_cache_size value: '100'