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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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sql/sql_class.h
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@@ -192,6 +192,8 @@ enum enum_binlog_row_image {
#define OLD_MODE_NO_PROGRESS_INFO (1 << 1)
#define OLD_MODE_ZERO_DATE_TIME_CAST (1 << 2)
#define OLD_MODE_UTF8_IS_UTF8MB3 (1 << 3)
#define OLD_MODE_IGNORE_INDEX_ONLY_FOR_JOIN (1 << 4)
#define OLD_MODE_COMPAT_5_1_CHECKSUM (1 << 5)
extern char internal_table_name[2];
extern char empty_c_string[1];