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MDL-23682 new MySQL engine diagnostics + InnoDB is now used instead of MyISAM in new installs if available + improved mysql transaction support

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This commit is contained in:
Petr Skoda
2010-08-18 16:47:00 +00:00
parent ca7b6997a6
commit d35ece6cce
5 changed files with 152 additions and 11 deletions
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29
lib/ddl/mysql_sql_generator.php
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@@ -96,6 +96,33 @@ class mysql_sql_generator extends sql_generator {
return array("ALTER TABLE $this->prefix$tablename AUTO_INCREMENT = $value");
}
/**
* Given one correct xmldb_table, returns the SQL statements
* to create it (inside one array)
*/
public function getCreateTableSQL($xmldb_table) {
// first find out if want some special db engine
$engine = null;
if (method_exists($this->mdb, 'get_dbengine')) {
$engine = $this->mdb->get_dbengine();
}
$sqlarr = parent::getCreateTableSQL($xmldb_table);
if (!$engine) {
// we rely on database defaults
return $sqlarr;
}
// let's inject the engine into SQL
foreach ($sqlarr as $i=>$sql) {
if (strpos($sql, 'CREATE TABLE ') === 0) {
$sqlarr[$i] .= " ENGINE = $engine";
}
}
return $sqlarr;
}
/**
* Given one correct xmldb_table, returns the SQL statements
@@ -103,7 +130,7 @@ class mysql_sql_generator extends sql_generator {
*/
public function getCreateTempTableSQL($xmldb_table) {
$this->temptables->add_temptable($xmldb_table->getName());
$sqlarr = $this->getCreateTableSQL($xmldb_table);
$sqlarr = parent::getCreateTableSQL($xmldb_table); // we do not want the engine hack included in create table SQL
$sqlarr = preg_replace('/^CREATE TABLE (.*)/s', 'CREATE TEMPORARY TABLE $1', $sqlarr);
return $sqlarr;
}