def execute_using_impala_beeswax(query, query_config):
"""Executes a query using beeswax.
A new client is created per query, then destroyed.
Args:
query (str): string containing the query to be executed.
query_config (QueryExecConfig)
Returns:
QueryResult
"""
# Create a client object to talk to impalad
exec_result = QueryResult(query, query_config=query_config)
plugin_runner = query_config.plugin_runner
(success, client) = establish_beeswax_connection(query.query_str,
query_config)
if not success: return exec_result
# We need to issue a use database here.
if query.db:
use_query = 'use %s' % query.db
client.execute(use_query)
# create a map for query options and the query names to send to the plugin
context = build_context(query, query_config)
if plugin_runner:
plugin_runner.run_plugins_pre(context=context, scope="Query")
result = ImpalaBeeswaxResult()
try:
result = client.execute(query.query_str)
except Exception, e:
LOG.error(e)
exec_result.query_error = str(e)
def create_exec_result(time_taken, result_data):
exec_result = QueryResult()
if result_data:
LOG.debug('Data:\n%s\n' % result_data)
exec_result.data = result_data
exec_result.time_taken = time_taken
exec_result.success = True
return exec_result
def run_query_capture_results(cmd, query, exit_on_error):
"""
Runs the given query command and returns the execution result.
Takes in a match function that is used to parse stderr/stdout to extract the results.
"""
exec_result = QueryResult(query)
start_time = datetime.now()
try:
rc, stdout, stderr = exec_process(cmd)
except Exception, e:
LOG.error('Error while executing query command: %s' % e)
exec_result.query_error = str(e)
# TODO: Should probably save the start time and query string for failed queries.
return exec_result
def __init__(self, name, query, func, config, exit_on_error):
self.exec_func = func
self.exec_config = config
self.query = query
self.exit_on_error = exit_on_error
self.executor_name = name
self._result = QueryResult(query, query_config=self.exec_config)