code: def execute(self, conn, block_name="", transaction = False):
          
          if not conn:
  	    dbsExceptionHandler("dbsException-failed-connect2host", "Oracle/BlockParent/List. Expects db connection from upper layer.", self.logger.exception)
  
          sql = self.sql
          
  	if isinstance(block_name, basestring):
  	    binds = {'block_name' :block_name}
          elif type(block_name) is list:
              binds = [{'block_name':x} for x in block_name]
          else: 
              msg = "Oracle/BlockParent/List. Block_name must be provided either as a string or as a list."
              dbsExceptionHandler('dbsException-invalid-input', msg, self.logger.exception)
  	result = self.dbi.processData(sql, binds, conn, transaction)
          return self.formatDict(result)
docs: block: /a/b/c#d