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MDEV-24920: Merge "old" SQL variable to "old_mode" sql variable

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Analysis: There are 2 server variables- "old_mode" and "old". "old" is no
longer needed as "old_mode" has replaced it (however still used in some places
 in the code). "old_mode" and "old" has same purpose- emulate behavior from
previous MariaDB versions. So they can be merged to avoid confusion.
Fix: Deprecate "old" variable and create another mode for @@old_mode to mimic
behavior of previous "old" variable. Create specific modes for specifix task
that --old sql variable was doing earlier and use the new modes instead.
This commit is contained in:
Rucha Deodhar
2021-08-13 15:49:16 +05:30
parent c132bce1a1
commit 5945e420f1
14 changed files with 131 additions and 15 deletions
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6
mysql-test/suite/sys_vars/r/old_basic.result
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@@ -17,7 +17,11 @@ select * from information_schema.session_variables where variable_name='old';
VARIABLE_NAME VARIABLE_VALUE
OLD OFF
set global old=1;
Warnings:
Warning 1287 '@@old' is deprecated and will be removed in a future release. Please use '@@old_mode' instead
set session old=1;
Warnings:
Warning 1287 '@@old' is deprecated and will be removed in a future release. Please use '@@old_mode' instead
select @@global.old;
@@global.old
1
@@ -25,3 +29,5 @@ select @@session.old;
@@session.old
1
set @@global.old=DEFAULT;
Warnings:
Warning 1287 '@@old' is deprecated and will be removed in a future release. Please use '@@old_mode' instead