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Added example for async execute query#537

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jprakash-db merged 1 commit intomainfromjprakash-db/async-execute-example
Apr 1, 2025
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32 changes: 32 additions & 0 deletionsexamples/query_async_execute.py
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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,32 @@
from databricks import sql
import os
import time

with sql.connect(
server_hostname=os.getenv("DATABRICKS_SERVER_HOSTNAME"),
http_path=os.getenv("DATABRICKS_HTTP_PATH"),
access_token=os.getenv("DATABRICKS_TOKEN"),
) as connection:

with connection.cursor() as cursor:
long_running_query = """
SELECT COUNT(*) FROM RANGE(10000 * 16) x
JOIN RANGE(10000) y
ON FROM_UNIXTIME(x.id * y.id, 'yyyy-MM-dd') LIKE '%not%a%date%'
"""

# Non-blocking call
cursor.execute_async(long_running_query)

# Polling every 5 seconds until the query is no longer pending
while cursor.is_query_pending():
print("POLLING")
time.sleep(5)

# Blocking call: fetch results when execution completes
cursor.get_async_execution_result()

result = cursor.fetchall()

for res in result:
print(res)
21 changes: 14 additions & 7 deletionssrc/databricks/sql/client.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -896,6 +896,19 @@ def get_query_state(self) -> "TOperationState":
self._check_not_closed()
return self.thrift_backend.get_query_state(self.active_op_handle)

def is_query_pending(self):
"""
Checks whether the async executing query is in pending state or not

:return:
"""
operation_state = self.get_query_state()

return not operation_state or operation_state in [
ttypes.TOperationState.RUNNING_STATE,
ttypes.TOperationState.PENDING_STATE,
]

def get_async_execution_result(self):
"""

Expand All@@ -905,13 +918,7 @@ def get_async_execution_result(self):
"""
self._check_not_closed()

def is_executing(operation_state) -> "bool":
return not operation_state or operation_state in [
ttypes.TOperationState.RUNNING_STATE,
ttypes.TOperationState.PENDING_STATE,
]

while is_executing(self.get_query_state()):
while self.is_query_pending():
# Poll after some default time
time.sleep(self.ASYNC_DEFAULT_POLLING_INTERVAL)

Expand Down
15 changes: 9 additions & 6 deletionssrc/databricks/sql/thrift_backend.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -797,12 +797,15 @@ def get_execution_result(self, op_handle, cursor):
t_result_set_metadata_resp.schema
)

schema_bytes = (
t_result_set_metadata_resp.arrowSchema
or self._hive_schema_to_arrow_schema(t_result_set_metadata_resp.schema)
.serialize()
.to_pybytes()
)
if pyarrow:
schema_bytes = (
t_result_set_metadata_resp.arrowSchema
or self._hive_schema_to_arrow_schema(t_result_set_metadata_resp.schema)
.serialize()
.to_pybytes()
)
else:
schema_bytes = None

queue = ResultSetQueueFactory.build_queue(
row_set_type=resp.resultSetMetadata.resultFormat,
Expand Down
12 changes: 3 additions & 9 deletionstests/e2e/test_driver.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -179,20 +179,14 @@ def test_cloud_fetch(self):


class TestPySQLAsyncQueriesSuite(PySQLPytestTestCase):
def isExecuting(self, operation_state):
return not operation_state or operation_state in [
ttypes.TOperationState.RUNNING_STATE,
ttypes.TOperationState.PENDING_STATE,
]

def test_execute_async__long_running(self):

long_running_query = "SELECT COUNT(*) FROM RANGE(10000 * 16) x JOIN RANGE(10000) y ON FROM_UNIXTIME(x.id * y.id, 'yyyy-MM-dd') LIKE '%not%a%date%'"
with self.cursor() as cursor:
cursor.execute_async(long_running_query)

## Polling after every POLLING_INTERVAL seconds
whileself.isExecuting(cursor.get_query_state()):
while cursor.is_query_pending():
time.sleep(self.POLLING_INTERVAL)
log.info("Polling the status in test_execute_async")

Expand All@@ -211,7 +205,7 @@ def test_execute_async__small_result(self):
time.sleep(5)

## Polling after every POLLING_INTERVAL seconds
whileself.isExecuting(cursor.get_query_state()):
while cursor.is_query_pending():
time.sleep(self.POLLING_INTERVAL)
log.info("Polling the status in test_execute_async")

Expand DownExpand Up@@ -241,7 +235,7 @@ def test_execute_async__large_result(self):
time.sleep(5)

## Polling after every POLLING_INTERVAL seconds
whileself.isExecuting(cursor.get_query_state()):
while cursor.is_query_pending():
time.sleep(self.POLLING_INTERVAL)
log.info("Polling the status in test_execute_async")

Expand Down
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