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407e9b78cf
The purpose of this task is to ensure that DROP TRIGGER is atomic.
Description of how atomic drop trigger works:
Logging of DROP TRIGGER
Log the following information:
db
table name
trigger name
xid /* Used to check if query was already logged to binary log */
initial length of the .TRG file
query if there is space for it, if not log a zero length query.
Recovery operations:
- Delete if exists 'database/trigger_name.TRN~'
- If this file existed, it means that we crashed before the trigger
was deleted and there is nothing else to do.
- Get length of .TRG file
- If file length is unchanged, trigger was not dropped. Nothing else to
do.
- Log original query to binary, if it was stored in the ddl log. If it was
not stored (long query string), log the following query to binary log:
use `database` ; DROP TRIGGER IF EXISTS `trigger_name`
/* generated by ddl log */;
Other things:
- Added trigger name and DDL_LOG_STATE to drop_trigger()
Trigger name was added to make the interface more consistent and
more general.
50 lines
2.1 KiB
Plaintext
50 lines
2.1 KiB
Plaintext
"engine: aria crash point: ddl_log_drop_before_drop_trigger position: 1"
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t1.TRG
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t1_trg.TRN
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t2_trg.TRN
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"engine: aria crash point: ddl_log_drop_before_drop_trigger position: 2"
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t1.TRG
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t2_trg.TRN
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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"engine: aria crash point: ddl_log_drop_before_drop_trn position: 1"
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t1.TRG
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t2_trg.TRN
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t1_trg
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"engine: aria crash point: ddl_log_drop_before_drop_trn position: 2"
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t2_trg /* some comment */
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"engine: aria crash point: ddl_log_drop_after_drop_trigger position: 1"
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t1.TRG
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t2_trg.TRN
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t1_trg
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"engine: aria crash point: ddl_log_drop_after_drop_trigger position: 2"
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t2_trg /* some comment */
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"engine: aria crash point: definition_file_after_create position: 1"
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t1.TRG
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t1_trg.TRN
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t2_trg.TRN
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"engine: aria crash point: definition_file_after_create position: 2"
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"No crash!"
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t2_trg /* some comment */
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"engine: aria crash point: ddl_log_drop_before_binlog position: 1"
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t1.TRG
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t2_trg.TRN
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t1_trg
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"engine: aria crash point: ddl_log_drop_before_binlog position: 2"
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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master-bin.000002 # Query # # use `test`; DROP TRIGGER t2_trg /* some comment */
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"engine: aria crash point: ddl_log_drop_after_binlog position: 1"
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t1.TRG
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t2_trg.TRN
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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"engine: aria crash point: ddl_log_drop_after_binlog position: 2"
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t1_trg
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master-bin.000001 # Query # # use `test`; DROP TRIGGER t2_trg /* some comment */
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# Test deleting not existing trigger
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#
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Warnings:
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Note 1360 Trigger does not exist
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