#NEWLINE# def _do_pre_synchronize( self ) : #NEWLINE# #INDENT# query = select_stmt . query #NEWLINE# session = query . session #NEWLINE# select_stmt = self . context . statement . with_only_columns ( self . primary_table . primary_key ) #NEWLINE# self . matched_rows = session . execute ( select_stmt , params = query . _params ) . fetchall ( )