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Iotdb
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体验新版 GitCode,发现更多精彩内容 >>
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fe0b6275
编写于
11月 16, 2019
作者:
J
Jackie Tien
提交者:
Jiang Tian
11月 16, 2019
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差异文件
Correct python example (#561)
* correct python example
上级
2eb8d60d
变更
2
隐藏空白更改
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Showing
2 changed file
with
34 addition
and
33 deletion
+34
-33
client-py/readme.md
client-py/readme.md
+1
-1
client-py/src/client_example.py
client-py/src/client_example.py
+33
-32
未找到文件。
client-py/readme.md
浏览文件 @
fe0b6275
...
...
@@ -20,7 +20,7 @@
-->
# Python connection
##
i
ntroduction
##
I
ntroduction
This is an example of how to connect to IoTDB with python, using the thrift rpc interfaces. Things
are almost the same on Windows or Linux, but pay attention to the difference like path separator.
...
...
client-py/src/client_example.py
浏览文件 @
fe0b6275
...
...
@@ -17,6 +17,7 @@
#
import
sys
,
struct
sys
.
path
.
append
(
"../target"
)
from
thrift.protocol
import
TBinaryProtocol
...
...
@@ -26,44 +27,45 @@ from rpc.TSIService import Client, TSCreateTimeseriesReq, TSInsertionReq, \
TSBatchInsertionReq
,
TSExecuteStatementReq
,
\
TS_SessionHandle
,
TSHandleIdentifier
,
TSOpenSessionReq
,
TSQueryDataSet
,
\
TSFetchResultsReq
,
TSCloseOperationReq
,
\
TSCloseSessionReq
,
TSProtocolVersion
TSCloseSessionReq
from
rpc.ttypes
import
TSProtocolVersion
TSDataType
=
{
'BOOLEAN'
:
0
,
'INT32'
:
1
,
'INT64'
:
2
,
'FLOAT'
:
3
,
'DOUBLE'
:
4
,
'TEXT'
:
5
'BOOLEAN'
:
0
,
'INT32'
:
1
,
'INT64'
:
2
,
'FLOAT'
:
3
,
'DOUBLE'
:
4
,
'TEXT'
:
5
}
TSEncoding
=
{
'PLAIN'
:
0
,
'PLAIN_DICTIONARY'
:
1
,
'RLE'
:
2
,
'DIFF'
:
3
,
'TS_2DIFF'
:
4
,
'BITMAP'
:
5
,
'GORILLA'
:
6
,
'REGULAR'
:
7
'PLAIN'
:
0
,
'PLAIN_DICTIONARY'
:
1
,
'RLE'
:
2
,
'DIFF'
:
3
,
'TS_2DIFF'
:
4
,
'BITMAP'
:
5
,
'GORILLA'
:
6
,
'REGULAR'
:
7
}
Compressor
=
{
'UNCOMPRESSED'
:
0
,
'SNAPPY'
:
1
,
'GZIP'
:
2
,
'LZO'
:
3
,
'SDT'
:
4
,
'PAA'
:
5
,
'PLA'
:
6
'UNCOMPRESSED'
:
0
,
'SNAPPY'
:
1
,
'GZIP'
:
2
,
'LZO'
:
3
,
'SDT'
:
4
,
'PAA'
:
5
,
'PLA'
:
6
}
def
convertQueryDataSet
(
queryDataSet
,
dataTypeList
):
bytes
=
queryDataSet
.
values
row_count
=
queryDataSet
.
rowCount
time_bytes
=
bytes
[:
8
*
row_count
]
value_bytes
=
bytes
[
8
*
row_count
:]
time_bytes
=
bytes
[:
8
*
row_count
]
value_bytes
=
bytes
[
8
*
row_count
:]
time_unpack_str
=
'>'
+
str
(
row_count
)
+
'q'
records
=
[]
times
=
struct
.
unpack
(
time_unpack_str
,
time_bytes
)
...
...
@@ -183,9 +185,9 @@ if __name__ == '__main__':
# insert a single row
values
=
[
"1"
,
"11"
,
"1.1"
,
"11.1"
,
"TRUE"
,
"
\'
text0
\'
"
]
timestamp
=
1
status
=
client
.
insert
Row
(
TSInsertionReq
(
deviceId
,
measurements
,
values
,
timestamp
,
stmtId
))
print
(
status
.
status
Type
)
status
=
client
.
insert
(
TSInsertionReq
(
deviceId
,
measurements
,
values
,
timestamp
,
stmtId
))
print
(
status
.
status
)
# insert multiple rows, this interface is more efficient
values
=
bytearray
()
...
...
@@ -217,7 +219,7 @@ if __name__ == '__main__':
print
(
status
.
statusType
)
# execute deletion (or other statements)
resp
=
client
.
executeStatement
(
TSExecuteStatementReq
(
handle
,
"DELETE FROM root.group1 where time < 2"
))
resp
=
client
.
executeStatement
(
TSExecuteStatementReq
(
handle
,
"DELETE FROM root.group1 where time < 2"
,
stmtId
))
status
=
resp
.
status
print
(
status
.
statusType
)
...
...
@@ -225,8 +227,7 @@ if __name__ == '__main__':
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
queryId
=
1
resp
=
client
.
executeQueryStatement
(
TSExecuteStatementReq
(
handle
,
stmt
))
resp
=
client
.
executeQueryStatement
(
TSExecuteStatementReq
(
handle
,
stmt
,
stmtId
))
# headers
dataTypeList
=
resp
.
dataTypeList
print
(
resp
.
columns
)
...
...
@@ -235,6 +236,8 @@ if __name__ == '__main__':
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
)
...
...
@@ -248,5 +251,3 @@ if __name__ == '__main__':
# and do not forget to close the session before exiting
client
.
closeSession
(
TSCloseSessionReq
(
handle
))
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