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# from utils import pack_funcs
import typing
from calendar import timegm
from datetime import datetime as Datetime
from datetime import timezone as Timezone
from enum import Enum, IntEnum
FC_TEXT: int = 0
FC_BINARY: int = 1
_client_encoding: str = "utf8"
class ClientProtocolVersion(IntEnum):
BASE_SERVER = 0
EXTENDED_RESULT_METADATA = 1
BINARY = 2
@classmethod
def list(cls) -> typing.List[int]:
return list(map(lambda p: p.value, cls)) # type: ignore
@classmethod
def get_name(cls, i: int) -> str:
try:
return ClientProtocolVersion(i).name
except ValueError:
return str(i)
DEFAULT_PROTOCOL_VERSION: int = ClientProtocolVersion.BINARY.value
class DbApiParamstyle(Enum):
QMARK = "qmark"
NUMERIC = "numeric"
NAMED = "named"
FORMAT = "format"
PYFORMAT = "pyformat"
@classmethod
def list(cls) -> typing.List[int]:
return list(map(lambda p: p.value, cls)) # type: ignore
min_int2: int = -(2**15)
max_int2: int = 2**15
min_int4: int = -(2**31)
max_int4: int = 2**31
min_int8: int = -(2**63)
max_int8: int = 2**63
EPOCH: Datetime = Datetime(2000, 1, 1)
EPOCH_TZ: Datetime = EPOCH.replace(tzinfo=Timezone.utc)
EPOCH_SECONDS: int = timegm(EPOCH.timetuple())
INFINITY_MICROSECONDS: int = 2**63 - 1
MINUS_INFINITY_MICROSECONDS: int = -1 * INFINITY_MICROSECONDS - 1
# pg element oid -> pg array typeoid
pg_array_types: typing.Dict[int, int] = {
16: 1000,
# 25: 1009, # TEXT[]
701: 1022,
1043: 1009,
# 1700: 1231, # NUMERIC[]
}
# PostgreSQL encodings:
# http://www.postgresql.org/docs/8.3/interactive/multibyte.html
# Python encodings:
# http://www.python.org/doc/2.4/lib/standard-encodings.html
#
# Commented out encodings don't require a name change between Amazon Redshift and
# Python. If the py side is None, then the encoding isn't supported.
pg_to_py_encodings: typing.Dict[str, typing.Optional[str]] = {
# Not supported:
"mule_internal": None,
"euc_tw": None,
# Name fine as-is:
# "euc_jp",
# "euc_jis_2004",
# "euc_kr",
# "gb18030",
# "gbk",
# "johab",
# "sjis",
# "shift_jis_2004",
# "uhc",
# "utf8",
# Different name:
"euc_cn": "gb2312",
"iso_8859_5": "is8859_5",
"iso_8859_6": "is8859_6",
"iso_8859_7": "is8859_7",
"iso_8859_8": "is8859_8",
"koi8": "koi8_r",
"latin1": "iso8859-1",
"latin2": "iso8859_2",
"latin3": "iso8859_3",
"latin4": "iso8859_4",
"latin5": "iso8859_9",
"latin6": "iso8859_10",
"latin7": "iso8859_13",
"latin8": "iso8859_14",
"latin9": "iso8859_15",
"sql_ascii": "ascii",
"win866": "cp886",
"win874": "cp874",
"win1250": "cp1250",
"win1251": "cp1251",
"win1252": "cp1252",
"win1253": "cp1253",
"win1254": "cp1254",
"win1255": "cp1255",
"win1256": "cp1256",
"win1257": "cp1257",
"win1258": "cp1258",
"unicode": "utf-8", # Needed for Amazon Redshift
}
table_type_clauses: typing.Dict[str, typing.Optional[typing.Dict[str, str]]] = {
"TABLE": {
"SCHEMAS": "c.relkind = 'r' AND n.nspname !~ '^pg_' AND n.nspname <> 'information_schema'",
"NOSCHEMAS": "c.relkind = 'r' AND c.relname !~ '^pg_'",
},
"VIEW": {
"SCHEMAS": "c.relkind = 'v' AND n.nspname <> 'pg_catalog' AND n.nspname <> 'information_schema'",
"NOSCHEMAS": "c.relkind = 'v' AND c.relname !~ '^pg_'",
},
"INDEX": {
"SCHEMAS": "c.relkind = 'i' AND n.nspname !~ '^pg_' AND n.nspname <> 'information_schema'",
"NOSCHEMAS": "c.relkind = 'i' AND c.relname !~ '^pg_'",
},
"SEQUENCE": {"SCHEMAS": "c.relkind = 'S'", "NOSCHEMAS": "c.relkind = 'S'"},
"TYPE": {
"SCHEMAS": "c.relkind = 'c' AND n.nspname !~ '^pg_' AND n.nspname <> 'information_schema'",
"NOSCHEMAS": "c.relkind = 'c' AND c.relname !~ '^pg_'",
},
"SYSTEM TABLE": {
"SCHEMAS": "c.relkind = 'r' AND (n.nspname = 'pg_catalog' OR n.nspname = 'information_schema')",
"NOSCHEMAS": "c.relkind = 'r' AND c.relname ~ '^pg_' AND c.relname !~ '^pg_toast_' AND c.relname !~ '^pg_temp_'",
},
"SYSTEM TOAST TABLE": {
"SCHEMAS": "c.relkind = 'r' AND n.nspname = 'pg_toast'",
"NOSCHEMAS": "c.relkind = 'r' AND c.relname ~ '^pg_toast_'",
},
"SYSTEM TOAST INDEX": {
"SCHEMAS": "c.relkind = 'i' AND n.nspname = 'pg_toast'",
"NOSCHEMAS": "c.relkind = 'i' AND c.relname ~ '^pg_toast_'",
},
"SYSTEM VIEW": {
"SCHEMAS": "c.relkind = 'v' AND (n.nspname = 'pg_catalog' OR n.nspname = 'information_schema') ",
"NOSCHEMAS": "c.relkind = 'v' AND c.relname ~ '^pg_'",
},
"SYSTEM INDEX": {
"SCHEMAS": "c.relkind = 'i' AND (n.nspname = 'pg_catalog' OR n.nspname = 'information_schema') ",
"NOSCHEMAS": "c.relkind = 'v' AND c.relname ~ '^pg_' AND c.relname !~ '^pg_toast_' AND c.relname !~ '^pg_temp_'",
},
"TEMPORARY TABLE": {
"SCHEMAS": "c.relkind IN ('r','p') AND n.nspname ~ '^pg_temp_' ",
"NOSCHEMAS": "c.relkind IN ('r','p') AND c.relname ~ '^pg_temp_' ",
},
"TEMPORARY INDEX": {
"SCHEMAS": "c.relkind = 'i' AND n.nspname ~ '^pg_temp_' ",
"NOSCHEMAS": "c.relkind = 'i' AND c.relname ~ '^pg_temp_' ",
},
"TEMPORARY VIEW": {
"SCHEMAS": "c.relkind = 'v' AND n.nspname ~ '^pg_temp_' ",
"NOSCHEMAS": "c.relkind = 'v' AND c.relname ~ '^pg_temp_' ",
},
"TEMPORARY SEQUENCE": {
"SCHEMAS": "c.relkind = 'S' AND n.nspname ~ '^pg_temp_' ",
"NOSCHEMAS": "c.relkind = 'S' AND c.relname ~ '^pg_temp_' ",
},
"EXTERNAL TABLE": None,
"SHARED TABLE": None,
}
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