Permalink
Browse files

Added half of oracle backend. (The other half is all of the special-c…

…asing in django/db/models/query.py, which I will be refactoring.) Refs #1990. Thanks, Jason Huggins and tzellman

git-svn-id: http://code.djangoproject.com/svn/django/trunk@2986 bcc190cf-cafb-0310-a4f2-bffc1f526a37
  • Loading branch information...
adrianholovaty committed May 26, 2006
1 parent 0fd9eef commit cac7675f247da325cb862a312804fe64845d1155
No changes.
@@ -0,0 +1,122 @@
"""
Oracle database backend for Django.
Requires cx_Oracle: http://www.python.net/crew/atuining/cx_Oracle/
"""
from django.db.backends import util
import cx_Oracle as Database
import types
DatabaseError = Database.Error
try:
# Only exists in Python 2.4+
from threading import local
except ImportError:
# Import copy of _thread_local.py from Python 2.4
from django.utils._threading_local import local
class DatabaseWrapper(local):
def __init__(self):
self.connection = None
self.queries = []
def _valid_connection(self):
return self.connection is not None
def cursor(self):
from django.conf import settings
if not self._valid_connection():
if len(settings.DATABASE_HOST.strip()) == 0:
settings.DATABASE_HOST = 'localhost'
if len(settings.DATABASE_PORT.strip()) != 0:
dsn = Database.makedsn(settings.DATABASE_HOST, int(settings.DATABASE_PORT), settings.DATABASE_NAME)
self.connection = Database.connect(settings.DATABASE_USER, settings.DATABASE_PASSWORD, dsn)
else:
conn_string = "%s/%s@%s" % (settings.DATABASE_USER, settings.DATABASE_PASSWORD, settings.DATABASE_NAME)
self.connection = Database.connect(conn_string)
return FormatStylePlaceholderCursor(self.connection)
def _commit(self):
self.connection.commit()
def _rollback(self):
if self.connection:
try:
self.connection.rollback()
except Database.NotSupportedError:
pass
def close(self):
if self.connection is not None:
self.connection.close()
self.connection = None
supports_constraints = True
class FormatStylePlaceholderCursor(Database.Cursor):
"""
Django uses "format" (e.g. '%s') style placeholders, but Oracle uses ":var" style.
This fixes it -- but note that if you want to use a literal "%s" in a query,
you'll need to use "%%s".
"""
def execute(self, query, params=[]):
query = self.convert_arguments(query, len(params))
return Database.Cursor.execute(self, query, params)
def executemany(self, query, params=[]):
query = self.convert_arguments(query, len(params[0]))
return Database.Cursor.executemany(self, query, params)
def convert_arguments(self, query, num_params):
# replace occurances of "%s" with ":arg" - Oracle requires colons for parameter placeholders.
args = [':arg' for i in range(num_params)]
return query % tuple(args)
def quote_name(name):
return name
dictfetchone = util.dictfetchone
dictfetchmany = util.dictfetchmany
dictfetchall = util.dictfetchall
def get_last_insert_id(cursor, table_name, pk_name):
query = "SELECT %s_sq.currval from dual" % table_name
cursor.execute(query)
return cursor.fetchone()[0]
def get_date_extract_sql(lookup_type, table_name):
# lookup_type is 'year', 'month', 'day'
# http://www.psoug.org/reference/date_func.html
return "EXTRACT(%s FROM %s)" % (lookup_type, table_name)
def get_date_trunc_sql(lookup_type, field_name):
return "EXTRACT(%s FROM TRUNC(%s))" % (lookup_type, field_name)
def get_limit_offset_sql(limit, offset=None):
# Limits and offset are too complicated to be handled here.
# Instead, they are handled in django/db/query.py.
pass
def get_random_function_sql():
return "DBMS_RANDOM.RANDOM"
def get_drop_foreignkey_sql():
return "DROP FOREIGN KEY"
OPERATOR_MAPPING = {
'exact': '= %s',
'iexact': 'LIKE %s',
'contains': 'LIKE %s',
'icontains': 'LIKE %s',
'ne': '!= %s',
'gt': '> %s',
'gte': '>= %s',
'lt': '< %s',
'lte': '<= %s',
'startswith': 'LIKE %s',
'endswith': 'LIKE %s',
'istartswith': 'LIKE %s',
'iendswith': 'LIKE %s',
}
@@ -0,0 +1,10 @@
from django.conf import settings
import os
def runshell():
args = ''
args += settings.DATABASE_USER
if settings.DATABASE_PASSWORD:
args += "/%s" % settings.DATABASE_PASSWORD
args += "@%s" % settings.DATABASE_NAME
os.execvp('sqlplus', args)
@@ -0,0 +1,26 @@
DATA_TYPES = {
'AutoField': 'number(38)',
'BooleanField': 'number(1)',
'CharField': 'varchar2(%(maxlength)s)',
'CommaSeparatedIntegerField': 'varchar2(%(maxlength)s)',
'DateField': 'date',
'DateTimeField': 'date',
'FileField': 'varchar2(100)',
'FilePathField': 'varchar2(100)',
'FloatField': 'number(%(max_digits)s, %(decimal_places)s)',
'ImageField': 'varchar2(100)',
'IntegerField': 'integer',
'IPAddressField': 'char(15)',
'ManyToManyField': None,
'NullBooleanField': 'integer',
'OneToOneField': 'integer',
'PhoneNumberField': 'varchar(20)',
'PositiveIntegerField': 'integer',
'PositiveSmallIntegerField': 'smallint',
'SlugField': 'varchar(50)',
'SmallIntegerField': 'smallint',
'TextField': 'long',
'TimeField': 'timestamp',
'URLField': 'varchar(200)',
'USStateField': 'varchar(2)',
}
@@ -0,0 +1,52 @@
from django.db import transaction
from django.db.backends.oracle.base import quote_name
import re
foreign_key_re = re.compile(r"\sCONSTRAINT `[^`]*` FOREIGN KEY \(`([^`]*)`\) REFERENCES `([^`]*)` \(`([^`]*)`\)")
def get_table_list(cursor):
"Returns a list of table names in the current database."
cursor.execute("SELECT TABLE_NAME FROM USER_TABLES")
return [row[0] for row in cursor.fetchall()]
def get_table_description(cursor, table_name):
return table_name
def _name_to_index(cursor, table_name):
"""
Returns a dictionary of {field_name: field_index} for the given table.
Indexes are 0-based.
"""
return dict([(d[0], i) for i, d in enumerate(get_table_description(cursor, table_name))])
def get_relations(cursor, table_name):
"""
Returns a dictionary of {field_index: (field_index_other_table, other_table)}
representing all relationships to the given table. Indexes are 0-based.
"""
raise NotImplementedError
def get_indexes(cursor, table_name):
"""
Returns a dictionary of fieldname -> infodict for the given table,
where each infodict is in the format:
{'primary_key': boolean representing whether it's the primary key,
'unique': boolean representing whether it's a unique index}
"""
raise NotImplementedError
# Maps type codes to Django Field types.
DATA_TYPES_REVERSE = {
16: 'BooleanField',
21: 'SmallIntegerField',
23: 'IntegerField',
25: 'TextField',
869: 'IPAddressField',
1043: 'CharField',
1082: 'DateField',
1083: 'TimeField',
1114: 'DateTimeField',
1184: 'DateTimeField',
1266: 'TimeField',
1700: 'FloatField',
}

0 comments on commit cac7675

Please sign in to comment.