private $serverVersion = null;
/** @var bool|null */
private $insertSelectIsSafe = null;
+ /** @var stdClass|null */
+ private $replicationInfoRow = null;
/**
* Additional $params include:
return $this->nativeReplace( $table, $rows, $fname );
}
- protected function nativeInsertSelect(
- $destTable, $srcTable, $varMap, $conds,
- $fname = __METHOD__, $insertOptions = [], $selectOptions = [], $selectJoinConds = []
- ) {
- if ( $this->insertSelectIsSafe === null ) {
- // In MySQL, an INSERT SELECT is only replication safe with row-based
- // replication or if innodb_autoinc_lock_mode is 0. When those
- // conditions aren't met, use non-native mode.
- // While we could try to determine if the insert is safe anyway by
- // checking if the target table has an auto-increment column that
- // isn't set in $varMap, that seems unlikely to be worth the extra
- // complexity.
- $row = $this->selectRow(
+ protected function isInsertSelectSafe( array $insertOptions, array $selectOptions ) {
+ $row = $this->getReplicationSafetyInfo();
+ // For row-based-replication, the resulting changes will be relayed, not the query
+ if ( $row->binlog_format === 'ROW' ) {
+ return true;
+ }
+ // LIMIT requires ORDER BY on a unique key or it is non-deterministic
+ if ( isset( $selectOptions['LIMIT'] ) ) {
+ return false;
+ }
+ // In MySQL, an INSERT SELECT is only replication safe with row-based
+ // replication or if innodb_autoinc_lock_mode is 0. When those
+ // conditions aren't met, use non-native mode.
+ // While we could try to determine if the insert is safe anyway by
+ // checking if the target table has an auto-increment column that
+ // isn't set in $varMap, that seems unlikely to be worth the extra
+ // complexity.
+ return (
+ in_array( 'NO_AUTO_COLUMNS', $insertOptions ) ||
+ (int)$row->innodb_autoinc_lock_mode === 0
+ );
+ }
+
+ /**
+ * @return stdClass Process cached row
+ */
+ protected function getReplicationSafetyInfo() {
+ if ( $this->replicationInfoRow === null ) {
+ $this->replicationInfoRow = $this->selectRow(
false,
[
'innodb_autoinc_lock_mode' => '@@innodb_autoinc_lock_mode',
[],
__METHOD__
);
- $this->insertSelectIsSafe = $row->binlog_format === 'ROW' ||
- (int)$row->innodb_autoinc_lock_mode === 0;
- }
-
- if ( !$this->insertSelectIsSafe ) {
- return $this->nonNativeInsertSelect(
- $destTable,
- $srcTable,
- $varMap,
- $conds,
- $fname,
- $insertOptions,
- $selectOptions,
- $selectJoinConds
- );
- } else {
- return parent::nativeInsertSelect(
- $destTable,
- $srcTable,
- $varMap,
- $conds,
- $fname,
- $insertOptions,
- $selectOptions,
- $selectJoinConds
- );
}
+
+ return $this->replicationInfoRow;
}
/**
* Takes same arguments as Database::select()
*
* @param string|array $table
- * @param string|array $vars
+ * @param string|array $var
* @param string|array $conds
* @param string $fname
* @param string|array $options
+ * @param array $join_conds
* @return bool|int
*/
- public function estimateRowCount( $table, $vars = '*', $conds = '',
- $fname = __METHOD__, $options = []
+ public function estimateRowCount( $table, $var = '*', $conds = '',
+ $fname = __METHOD__, $options = [], $join_conds = []
) {
+ $conds = $this->normalizeConditions( $conds, $fname );
+ $column = $this->extractSingleFieldFromList( $var );
+ if ( is_string( $column ) && !in_array( $column, [ '*', '1' ] ) ) {
+ $conds[] = "$column IS NOT NULL";
+ }
+
$options['EXPLAIN'] = true;
- $res = $this->select( $table, $vars, $conds, $fname, $options );
+ $res = $this->select( $table, $var, $conds, $fname, $options, $join_conds );
if ( $res === false ) {
return false;
}
}
}
- return empty( $result ) ? false : $result;
+ return $result ?: false;
}
/**
return in_array( $name, $this->listViews( $prefix ) );
}
+ protected function isTransactableQuery( $sql ) {
+ return parent::isTransactableQuery( $sql ) &&
+ !preg_match( '/^SELECT\s+(GET|RELEASE|IS_FREE)_LOCK\(/', $sql );
+ }
+
/**
- * Allows for index remapping in queries where this is not consistent across DBMS
- *
- * @param string $index
+ * @param string $field Field or column to cast
* @return string
*/
- protected function indexName( $index ) {
- /**
- * When SQLite indexes were introduced in r45764, it was noted that
- * SQLite requires index names to be unique within the whole database,
- * not just within a schema. As discussed in CR r45819, to avoid the
- * need for a schema change on existing installations, the indexes
- * were implicitly mapped from the new names to the old names.
- *
- * This mapping can be removed if DB patches are introduced to alter
- * the relevant tables in existing installations. Note that because
- * this index mapping applies to table creation, even new installations
- * of MySQL have the old names (except for installations created during
- * a period where this mapping was inappropriately removed, see
- * T154872).
- */
- $renamed = [
- 'ar_usertext_timestamp' => 'usertext_timestamp',
- 'un_user_id' => 'user_id',
- 'un_user_ip' => 'user_ip',
- ];
-
- if ( isset( $renamed[$index] ) ) {
- return $renamed[$index];
- } else {
- return $index;
- }
+ public function buildIntegerCast( $field ) {
+ return 'CAST( ' . $field . ' AS SIGNED )';
}
- protected function isTransactableQuery( $sql ) {
- return parent::isTransactableQuery( $sql ) &&
- !preg_match( '/^SELECT\s+(GET|RELEASE|IS_FREE)_LOCK\(/', $sql );
- }
}
class_alias( DatabaseMysqlBase::class, 'DatabaseMysqlBase' );
dépôts / lhc / web / wiklou.git / blobdiff