queryId = resp.queryId
while True:
rst = client.fetchResults(
TSFetchResultsReq(sessionId, stmt, fetchSize,
queryId)).queryDataSet
records = convertQueryDataSet(rst, dataTypeList)
if len(records) == 0:
break
for record in records:
print(record)
# do not forget to close it when a query is over
closeReq = TSCloseOperationReq(sessionId)
closeReq.queryId = queryId
client.closeOperation(closeReq)
# query metadata
metaReq = TSFetchMetadataReq(sessionId=sessionId,
type=MetaQueryTypes.CATALOG_DEVICES)
print(client.fetchMetadata(metaReq).devices)
metaReq = TSFetchMetadataReq(sessionId=sessionId,
type=MetaQueryTypes.CATALOG_TIMESERIES,
columnPath='root')
print(client.fetchMetadata(metaReq).timeseriesList)
metaReq = TSFetchMetadataReq(sessionId=sessionId,
type=MetaQueryTypes.CATALOG_CHILD_PATHS,
columnPath='root')
print(client.fetchMetadata(metaReq).childPaths)
# query the data
stmt = "SELECT * FROM root.group1"
fetchSize = 2
# this is also for resource control, make sure different queries will not use the same id at the same time
resp = client.executeQueryStatement(
TSExecuteStatementReq(handle, stmt, stmtId))
# headers
dataTypeList = resp.dataTypeList
print(resp.columns)
print(dataTypeList)
stmtHandle = resp.operationHandle
status = resp.status
print(status.statusType)
queryId = resp.operationHandle.operationId.queryId
while True:
rst = client.fetchResults(TSFetchResultsReq(stmt, fetchSize,
queryId)).queryDataSet
records = convertQueryDataSet(rst, dataTypeList)
if len(records) == 0:
break
for record in records:
print(record)
# do not forget to close it when a query is over
client.closeOperation(TSCloseOperationReq(stmtHandle, queryId, stmtId))
# and do not forget to close the session before exiting
client.closeSession(TSCloseSessionReq(handle))
