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| author | Thirunarayanan B <thirunarayanan.balathandayuth@oracle.com> | 2014-02-10 10:13:35 +0530 |
|---|---|---|
| committer | Thirunarayanan B <thirunarayanan.balathandayuth@oracle.com> | 2014-02-10 10:13:35 +0530 |
| commit | 7acdf29cb4f90498af143430e3bf0e9fd3bd39f5 (patch) | |
| tree | 407483acf7b199ce206366d6c8216741417fbbfe /storage | |
| parent | 5ffe40022baad6b727627072a3e421fc9a6fc7ae (diff) | |
| download | mariadb-git-7acdf29cb4f90498af143430e3bf0e9fd3bd39f5.tar.gz | |
Bug #14049391 INNODB MISCALCULATES AUTO-INCREMENT AFTER DECREASING
AUTO_INCREMENT_INCREMENT
Problem:
=======
When auto_increment_increment system variable decreases,
immediate next value of auto increment column is not affected.
Solution:
========
Get the previous inserted value of auto increment column by
subtracting the previous auto_increment_increment from next
auto increment value. After that calculate the current autoinc value
using newly changed auto_increment_increment variable.
Approved by Sunny [rb#4394]
Diffstat (limited to 'storage')
| -rw-r--r-- | storage/innobase/handler/ha_innodb.cc | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index b95a1f52ed5..adedc4fa961 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -10235,6 +10235,21 @@ ha_innobase::get_auto_increment( current = *first_value > col_max_value ? autoinc : *first_value; + /* If the increment step of the auto increment column + decreases then it is not affecting the immediate + next value in the series. */ + if (prebuilt->autoinc_increment > increment) { + + current = autoinc - prebuilt->autoinc_increment; + + current = innobase_next_autoinc( + current, 1, increment, 1, col_max_value); + + dict_table_autoinc_initialize(prebuilt->table, current); + + *first_value = current; + } + /* Compute the last value in the interval */ next_value = innobase_next_autoinc( current, *nb_reserved_values, increment, offset, |