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MDL-14974 improved columns caching implementation

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skodak 2008-05-25 09:31:38 +00:00
parent aa07a81368
commit a7544e377a
11 changed files with 36 additions and 44 deletions
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9
lib/dml/moodle_database.php
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@ -9,6 +9,8 @@ abstract class moodle_database {
// manipulates the db structure
protected $database_manager;
protected $columns = array(); // I wish we had a shared memory cache for this :-(
// db connection options
protected $dbhost;
protected $dbuser;
@ -319,16 +321,19 @@ abstract class moodle_database {
/**
* Returns datailed information about columns in table. This information is cached internally.
* @param string $table name
* @param bool $usecache
* @return array array of database_column_info objects indexed with column names
*/
public abstract function get_columns($table);
public abstract function get_columns($table, $usecache=true);
/**
* Reset internal column details cache
* @param string $table - empty means all, or one if name of table given
* @return void
*/
public abstract function reset_columns($table=null);
public function reset_columns() {
$this->columns[] = array();
}
/**
* Returns sql generator used for db manipulation.