Fix error position computation: MySQL limits the length of the output SQL...

Fix error position computation: MySQL limits the length of the output SQL chunk, requiring more tricks to find offset error correctly.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25473 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZMySQLDA/db.py

@@ -415,10 +415,18 @@ class DB(TM):
             prefix, suffix = error_text.split("'", 1)
             if prefix == "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ":
               sql, suffix = suffix.rsplit("'", 1)
+              try:
+                line_number = int(suffix.rsplit(' ', 1)[-1])
+              except TypeError:
+                pass
+              else:
                 reference_sql = query
-              error_position = len(reference_sql) - len(sql)
+                split_reference_sql = reference_sql.split('\n')
+                candidate_sql = '\n'.join(split_reference_sql[line_number - 1:])
+                error_position = len(reference_sql) - len(candidate_sql) + candidate_sql.find(sql)
+                if error_position > -1:
                   raise ProgrammingError(exception[0], "%s '%s' HERE '%s' %s" % (prefix, reference_sql[:error_position], reference_sql[error_position:], suffix))
-          raise
+          raise exception
         return self.db.store_result()
 
     def query(self,query_string, max_rows=1000):