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[TD-4752]<feature>: python connector support nanosecond. (#6528)

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Shuduo Sang 2021-06-17 23:03:53 +08:00 committed by GitHub
parent a20f708a1f
commit 2be7275d99
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 34 additions and 24 deletions
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2
src/connector/python/setup.py
View File

@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
setuptools.setup(
name="taos",
version="2.0.10",
version="2.0.11",
author="Taosdata Inc.",
author_email="support@taosdata.com",
description="TDengine python client package",

54
src/connector/python/taos/cinterface.py
View File

@ -14,12 +14,22 @@ def _convert_microsecond_to_datetime(micro):
return datetime.datetime.fromtimestamp(micro / 1000000.0)
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
def _convert_nanosecond_to_datetime(nanosec):
return datetime.datetime.fromtimestamp(nanosec / 1000000000.0)
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bool row to python row
"""
_timestamp_converter = _convert_millisecond_to_datetime
if micro:
if precision == FieldType.C_TIMESTAMP_MILLI:
_timestamp_converter = _convert_millisecond_to_datetime
elif precision == FieldType.C_TIMESTAMP_MICRO:
_timestamp_converter = _convert_microsecond_to_datetime
elif precision == FieldType.C_TIMESTAMP_NANO:
_timestamp_converter = _convert_nanosecond_to_datetime
else:
raise DatabaseError("Unknown precision returned from database")
return [
None if ele == FieldType.C_BIGINT_NULL else _timestamp_converter(ele) for ele in ctypes.cast(
@ -28,7 +38,7 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
:abs(num_of_rows)]]
def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_bool_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bool row to python row
"""
return [
@ -38,7 +48,7 @@ def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
:abs(num_of_rows)]]
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C tinyint row to python row
"""
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
@ -49,7 +59,7 @@ def _crow_tinyint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C tinyint row to python row
"""
return [
@ -59,7 +69,7 @@ def _crow_tinyint_unsigned_to_python(
:abs(num_of_rows)]]
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C smallint row to python row
"""
return [
@ -70,7 +80,7 @@ def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_smallint_unsigned_to_python(
data, num_of_rows, nbytes=None, micro=False):
data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C smallint row to python row
"""
return [
@ -80,14 +90,14 @@ def _crow_smallint_unsigned_to_python(
:abs(num_of_rows)]]
def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_int_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C int row to python row
"""
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C int row to python row
"""
return [
@ -97,7 +107,7 @@ def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
:abs(num_of_rows)]]
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bigint row to python row
"""
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
@ -108,7 +118,7 @@ def _crow_bigint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C bigint row to python row
"""
return [
@ -118,21 +128,21 @@ def _crow_bigint_unsigned_to_python(
:abs(num_of_rows)]]
def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_float_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C float row to python row
"""
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_double_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C double row to python row
"""
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_binary_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
@ -140,7 +150,7 @@ def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_nchar_to_python(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
@ -159,7 +169,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
return res
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
@ -178,7 +188,7 @@ def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
return res
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, precision=FieldType.C_TIMESTAMP_UNKNOWN):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
@ -448,8 +458,7 @@ class CTaosInterface(object):
result, ctypes.byref(pblock))
if num_of_rows == 0:
return None, 0
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
precision = CTaosInterface.libtaos.taos_result_precision(result)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [
@ -462,7 +471,7 @@ class CTaosInterface(object):
if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
raise DatabaseError("Invalid data type returned from database")
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
data, num_of_rows, fieldLen[i], precision)
return blocks, abs(num_of_rows)
@ -472,8 +481,7 @@ class CTaosInterface(object):
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock:
num_of_rows = 1
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
precision = CTaosInterface.libtaos.taos_result_precision(result)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [
@ -490,7 +498,7 @@ class CTaosInterface(object):
blocks[i] = [None]
else:
blocks[i] = _CONVERT_FUNC[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
data, num_of_rows, fieldLen[i], precision)
else:
return None, 0
return blocks, abs(num_of_rows)

2
src/connector/python/taos/constants.py
View File

@ -40,3 +40,5 @@ class FieldType(object):
# Timestamp precision definition
C_TIMESTAMP_MILLI = 0
C_TIMESTAMP_MICRO = 1
C_TIMESTAMP_NANO = 2
C_TIMESTAMP_UNKNOWN = 3