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sparsevec.py
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27 lines (18 loc) · 921 Bytes
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from psycopg2.extensions import adapt, connection, cursor, new_array_type, new_type, register_adapter, register_type
from .. import SparseVector
class SparsevecAdapter:
def __init__(self, value: SparseVector) -> None:
self._value = value
def getquoted(self) -> bytes:
return adapt(self._value.to_text()).getquoted()
def cast_sparsevec(value: str | None, cur: cursor) -> SparseVector | None:
if value is None:
return None
return SparseVector.from_text(value)
def register_sparsevec_info(oid: int, array_oid: int | None, scope: connection | cursor | None) -> None:
sparsevec = new_type((oid,), 'SPARSEVEC', cast_sparsevec)
register_type(sparsevec, scope)
if array_oid is not None:
sparsevecarray = new_array_type((array_oid,), 'SPARSEVECARRAY', sparsevec)
register_type(sparsevecarray, scope)
register_adapter(SparseVector, SparsevecAdapter)