Task #457

Updated by Aaron Marcuse-Kubitza over 12 years ago

* Should improve performance by avoiding creating unnecessary transactions 
 * In commit mode, also removes the need to auto-rollback failed queries 

 In sql.py: DbConn._db(): Configure connection, replace[1]: 
 <pre><code class="Python"> 
             # Record that a transaction is already open 
             self._savepoint += 1 
            
             # Configure connection 
             if hasattr(self.db, 'set_isolation_level'): 
                 import psycopg2.extensions 
                 self.db.set_isolation_level( 
                     psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED) 
 </code></pre>with: 
 <pre><code </code><pre><code class="Python"> 
             # Record that a transaction is already open 
             if not self.autocommit: self._savepoint += 1 
            
             # Configure connection 
            
             # Set autocommit mode 
             if self.autocommit: 
                 if hasattr(self.db, 'set_isolation_level'): 
                     import psycopg2.extensions 
                     self.db.set_isolation_level( 
                         psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT) 
                 elif hasattr(self.db, 'autocommit'): self.db.autocommit(1) 
            
 </code></pre> 

 In sql.py: DbConn.close(): Record that the automatic transaction is now closed, replace[1]: 
 <pre><code class="Python"> 
         self._savepoint -= 1 
 </code></pre>with: 
 <pre><code class="Python"> 
         if not self.autocommit: self._savepoint -= 1 
 </code></pre> </pre> 

 fn1. r3689

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