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Code Issues 25 Releases Wiki Activity

Refs #28459 -- Improved performance of loading DecimalField on SQLite.

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This commit is contained in:
Sergey Fedoseev 2017-08-11 00:32:28 +05:00 committed by Tim Graham
parent bfb746f983
commit a146b65628
1 changed files with 6 additions and 3 deletions
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9
django/db/backends/sqlite3/operations.py
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@ -5,9 +5,9 @@ from contextlib import suppress
from django.conf import settings
from django.core.exceptions import FieldError
from django.db import utils
from django.db.backends import utils as backend_utils
from django.db.backends.base.operations import BaseDatabaseOperations
from django.db.models import aggregates, fields
from django.db.models.expressions import Col
from django.utils import timezone
from django.utils.dateparse import parse_date, parse_datetime, parse_time
from django.utils.duration import duration_string
@ -206,7 +206,9 @@ class DatabaseOperations(BaseDatabaseOperations):
converters.append(self.convert_datefield_value)
elif internal_type == 'TimeField':
converters.append(self.convert_timefield_value)
elif internal_type == 'DecimalField':
# Converter for Col is added with Database.register_converter()
# in base.py.
elif internal_type == 'DecimalField' and not isinstance(expression, Col):
converters.append(self.convert_decimalfield_value)
elif internal_type == 'UUIDField':
converters.append(self.convert_uuidfield_value)
@ -237,7 +239,8 @@ class DatabaseOperations(BaseDatabaseOperations):
def convert_decimalfield_value(self, value, expression, connection):
if value is not None:
value = expression.output_field.format_number(value)
value = backend_utils.typecast_decimal(value)
# Value is not converted to Decimal here as it will be converted
# later in BaseExpression.convert_value().
return value
def convert_uuidfield_value(self, value, expression, connection):