113 lines
3.1 KiB
Python
113 lines
3.1 KiB
Python
|
"""
|
||
|
|
Compatibility objects with DBAPI 2.0
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Copyright (C) 2020 The Psycopg Team
|
||
|
|
|
||
|
|
import time
|
||
|
|
import datetime as dt
|
||
|
|
from math import floor
|
||
|
|
from typing import Any, Sequence, Union
|
||
|
|
|
||
|
|
from . import postgres
|
||
|
|
from .abc import AdaptContext, Buffer
|
||
|
|
from .types.string import BytesDumper, BytesBinaryDumper
|
||
|
|
|
||
|
|
|
||
|
|
class DBAPITypeObject:
|
||
|
|
def __init__(self, name: str, type_names: Sequence[str]):
|
||
|
|
self.name = name
|
||
|
|
self.values = tuple(postgres.types[n].oid for n in type_names)
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
return f"psycopg.{self.name}"
|
||
|
|
|
||
|
|
def __eq__(self, other: Any) -> bool:
|
||
|
|
if isinstance(other, int):
|
||
|
|
return other in self.values
|
||
|
|
else:
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
def __ne__(self, other: Any) -> bool:
|
||
|
|
if isinstance(other, int):
|
||
|
|
return other not in self.values
|
||
|
|
else:
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
|
||
|
|
BINARY = DBAPITypeObject("BINARY", ("bytea",))
|
||
|
|
DATETIME = DBAPITypeObject(
|
||
|
|
"DATETIME", "timestamp timestamptz date time timetz interval".split()
|
||
|
|
)
|
||
|
|
NUMBER = DBAPITypeObject("NUMBER", "int2 int4 int8 float4 float8 numeric".split())
|
||
|
|
ROWID = DBAPITypeObject("ROWID", ("oid",))
|
||
|
|
STRING = DBAPITypeObject("STRING", "text varchar bpchar".split())
|
||
|
|
|
||
|
|
|
||
|
|
class Binary:
|
||
|
|
def __init__(self, obj: Any):
|
||
|
|
self.obj = obj
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
sobj = repr(self.obj)
|
||
|
|
if len(sobj) > 40:
|
||
|
|
sobj = f"{sobj[:35]} ... ({len(sobj)} byteschars)"
|
||
|
|
return f"{self.__class__.__name__}({sobj})"
|
||
|
|
|
||
|
|
|
||
|
|
class BinaryBinaryDumper(BytesBinaryDumper):
|
||
|
|
def dump(self, obj: Union[Buffer, Binary]) -> Buffer:
|
||
|
|
if isinstance(obj, Binary):
|
||
|
|
return super().dump(obj.obj)
|
||
|
|
else:
|
||
|
|
return super().dump(obj)
|
||
|
|
|
||
|
|
|
||
|
|
class BinaryTextDumper(BytesDumper):
|
||
|
|
def dump(self, obj: Union[Buffer, Binary]) -> Buffer:
|
||
|
|
if isinstance(obj, Binary):
|
||
|
|
return super().dump(obj.obj)
|
||
|
|
else:
|
||
|
|
return super().dump(obj)
|
||
|
|
|
||
|
|
|
||
|
|
def Date(year: int, month: int, day: int) -> dt.date:
|
||
|
|
return dt.date(year, month, day)
|
||
|
|
|
||
|
|
|
||
|
|
def DateFromTicks(ticks: float) -> dt.date:
|
||
|
|
return TimestampFromTicks(ticks).date()
|
||
|
|
|
||
|
|
|
||
|
|
def Time(hour: int, minute: int, second: int) -> dt.time:
|
||
|
|
return dt.time(hour, minute, second)
|
||
|
|
|
||
|
|
|
||
|
|
def TimeFromTicks(ticks: float) -> dt.time:
|
||
|
|
return TimestampFromTicks(ticks).time()
|
||
|
|
|
||
|
|
|
||
|
|
def Timestamp(
|
||
|
|
year: int, month: int, day: int, hour: int, minute: int, second: int
|
||
|
|
) -> dt.datetime:
|
||
|
|
return dt.datetime(year, month, day, hour, minute, second)
|
||
|
|
|
||
|
|
|
||
|
|
def TimestampFromTicks(ticks: float) -> dt.datetime:
|
||
|
|
secs = floor(ticks)
|
||
|
|
frac = ticks - secs
|
||
|
|
t = time.localtime(ticks)
|
||
|
|
tzinfo = dt.timezone(dt.timedelta(seconds=t.tm_gmtoff))
|
||
|
|
rv = dt.datetime(*t[:6], round(frac * 1_000_000), tzinfo=tzinfo)
|
||
|
|
return rv
|
||
|
|
|
||
|
|
|
||
|
|
def register_dbapi20_adapters(context: AdaptContext) -> None:
|
||
|
|
adapters = context.adapters
|
||
|
|
adapters.register_dumper(Binary, BinaryTextDumper)
|
||
|
|
adapters.register_dumper(Binary, BinaryBinaryDumper)
|
||
|
|
|
||
|
|
# Make them also the default dumpers when dumping by bytea oid
|
||
|
|
adapters.register_dumper(None, BinaryTextDumper)
|
||
|
|
adapters.register_dumper(None, BinaryBinaryDumper)
|