MDL-19470 detection of nested transactions, only one level allowed

2009-06-12 07:55:44 +00:00
parent 946a23bd03
commit a1dda107bd
6 changed files with 80 additions and 6 deletions
@@ -1107,6 +1107,9 @@ class pgsql_native_moodle_database extends moodle_database {
     * this is _very_ useful for massive updates
     */
    public function begin_sql() {
+        if (!parent::begin_sql()) {
+            return false;
+        }
        $sql = "BEGIN ISOLATION LEVEL READ COMMITTED";
        $this->query_start($sql, NULL, SQL_QUERY_AUX);
        $result = pg_query($this->pgsql, $sql);
@@ -1120,6 +1123,9 @@ class pgsql_native_moodle_database extends moodle_database {
     * on DBs that support it, commit the transaction
     */
    public function commit_sql() {
+        if (!parent::commit_sql()) {
+            return false;
+        }
        $sql = "COMMIT";
        $this->query_start($sql, NULL, SQL_QUERY_AUX);
        $result = pg_query($this->pgsql, $sql);
@@ -1133,6 +1139,9 @@ class pgsql_native_moodle_database extends moodle_database {
     * on DBs that support it, rollback the transaction
     */
    public function rollback_sql() {
+        if (!parent::rollback_sql()) {
+            return false;
+        }
        $sql = "ROLLBACK";
        $this->query_start($sql, NULL, SQL_QUERY_AUX);
        $result = pg_query($this->pgsql, $sql);