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Optimization of SQL queries: reduce the number of JOINS, assuming that data are consistent. Can be disabled with config setting query_optimization_enabled => 0.

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Also fixed caching issue (reproduced when replaying a query log)

SVN:trunk[2485]
This commit is contained in:
Romain Quetiez
2012-11-30 13:34:46 +00:00
parent 941d056db4
commit 78cb9f793a
5 changed files with 192 additions and 21 deletions
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16
core/config.class.inc.php
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@@ -133,6 +133,22 @@ class Config
'source_of_value' => '',
'show_in_conf_sample' => false,
),
'query_optimization_enabled' => array(
'type' => 'bool',
'description' => 'The queries are optimized based on the assumption that the DB integrity has been preserved. By disabling the optimization one can ensure that the fetched data is clean... but this can be really slower or not usable at all (some queries will exceed the allowed number of joins in MySQL: 61!)',
'default' => true,
'value' => true,
'source_of_value' => '',
'show_in_conf_sample' => false,
),
'query_indentation_enabled' => array(
'type' => 'bool',
'description' => 'For developpers: format the SQL queries for human analysis',
'default' => false,
'value' => true,
'source_of_value' => '',
'show_in_conf_sample' => false,
),
'graphviz_path' => array(
'type' => 'string',
'description' => 'Path to the Graphviz "dot" executable for graphing objects lifecycle',