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| author | Sergey Petrunya <psergey@askmonty.org> | 2011-08-23 19:28:32 +0400 |
|---|---|---|
| committer | Sergey Petrunya <psergey@askmonty.org> | 2011-08-23 19:28:32 +0400 |
| commit | 7e66213444a5af73879b57ad0b5bd7476b5c6f4d (patch) | |
| tree | 6939d6b4b4cea99971b19fd7ad97e8096ad26ebf /sql/sql_prepare.cc | |
| parent | d2206ad14920e85907c965256e1ce061633c36ee (diff) | |
| download | mariadb-git-7e66213444a5af73879b57ad0b5bd7476b5c6f4d.tar.gz | |
MWL#182: Explain running statements
First code
- "Asynchronous procedure call" system
- new THD::check_killed() that serves APC request is called from within most important loops
- EXPLAIN code is now able to generate EXPLAIN output on-the-fly [incomplete]
Parts that are still missing:
- put THD::check_killed() call into every loop where we could spend significant amount of time
- Make sure EXPLAIN code works for group-by queries that replace JOIN::join_tab with make_simple_join()
and other such cases.
- User interface: what error code to use, where to get timeout settings from, etc.
Diffstat (limited to 'sql/sql_prepare.cc')
| -rw-r--r-- | sql/sql_prepare.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/sql_prepare.cc b/sql/sql_prepare.cc index 5b5ed004006..465a026ad6e 100644 --- a/sql/sql_prepare.cc +++ b/sql/sql_prepare.cc @@ -2049,6 +2049,7 @@ static bool check_prepared_statement(Prepared_statement *stmt) case SQLCOM_SHOW_ENGINE_LOGS: case SQLCOM_SHOW_ENGINE_STATUS: case SQLCOM_SHOW_ENGINE_MUTEX: + case SQLCOM_SHOW_EXPLAIN: case SQLCOM_SHOW_CREATE_DB: case SQLCOM_SHOW_GRANTS: case SQLCOM_SHOW_BINLOG_EVENTS: |