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MDL-14974 improved columns caching implementation

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This commit is contained in:
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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15
lib/dml/adodb_moodle_database.php
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@ -10,7 +10,6 @@ require_once($CFG->libdir.'/dml/adodb_moodle_recordset.php');
abstract class adodb_moodle_database extends moodle_database {
protected $db;
protected $columns = array(); // I wish we had a shared memory cache for this :-(
/**
* Returns localised database type name
@ -137,8 +136,8 @@ abstract class adodb_moodle_database extends moodle_database {
return $indexes;
}
public function get_columns($table) {
if (isset($this->columns[$table])) {
public function get_columns($table, $usecache=true) {
if ($usecache and isset($this->columns[$table])) {
return $this->columns[$table];
}
@ -157,14 +156,6 @@ abstract class adodb_moodle_database extends moodle_database {
return $this->columns[$table];
}
public function reset_columns($table=null) {
if ($table) {
unset($this->columns[$table]);
} else {
$this->columns[$table] = array();
}
}
public function get_last_error() {
return $this->db->ErrorMsg();
}
@ -206,6 +197,8 @@ abstract class adodb_moodle_database extends moodle_database {
$result = false;
$this->report_error($sql);
}
// structure changed, reset columns cache
$this->reset_columns();
return $result;
}