# -*- coding: utf-8 -*-
import re
from .._globals import IDENTITY
from .base import BaseAdapter
[docs]class SAPDBAdapter(BaseAdapter):
drivers = ('sapdb',)
support_distributed_transaction = False
types = {
'boolean': 'CHAR(1)',
'string': 'VARCHAR(%(length)s)',
'text': 'LONG',
'json': 'LONG',
'password': 'VARCHAR(%(length)s)',
'blob': 'LONG',
'upload': 'VARCHAR(%(length)s)',
'integer': 'INT',
'bigint': 'BIGINT',
'float': 'FLOAT',
'double': 'DOUBLE PRECISION',
'decimal': 'FIXED(%(precision)s,%(scale)s)',
'date': 'DATE',
'time': 'TIME',
'datetime': 'TIMESTAMP',
'id': 'INT PRIMARY KEY',
'reference': 'INT, FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
'list:integer': 'LONG',
'list:string': 'LONG',
'list:reference': 'LONG',
'big-id': 'BIGINT PRIMARY KEY',
'big-reference': 'BIGINT, FOREIGN KEY (%(field_name)s) REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
}
[docs] def sequence_name(self,table):
return (self.QUOTE_TEMPLATE + '_id_Seq') % table
[docs] def select_limitby(self, sql_s, sql_f, sql_t, sql_w, sql_o, limitby):
if limitby:
(lmin, lmax) = limitby
if len(sql_w) > 1:
sql_w_row = sql_w + ' AND w_row > %i' % lmin
else:
sql_w_row = 'WHERE w_row > %i' % lmin
return '%s %s FROM (SELECT w_tmp.*, ROWNO w_row FROM (SELECT %s FROM %s%s%s) w_tmp WHERE ROWNO=%i) %s %s %s;' % (sql_s, sql_f, sql_f, sql_t, sql_w, sql_o, lmax, sql_t, sql_w_row, sql_o)
return 'SELECT %s %s FROM %s%s%s;' % (sql_s, sql_f, sql_t, sql_w, sql_o)
[docs] def create_sequence_and_triggers(self, query, table, **args):
# following lines should only be executed if table._sequence_name does not exist
self.execute('CREATE SEQUENCE %s;' % table._sequence_name)
self.execute("ALTER TABLE %s ALTER COLUMN %s SET DEFAULT NEXTVAL('%s');" \
% (table._tablename, table._id.name, table._sequence_name))
self.execute(query)
REGEX_URI = re.compile('^(?P<user>[^:@]+)(\:(?P<password>[^@]*))?@(?P<host>\[[^/]+\]|[^\:@]+)(\:(?P<port>[0-9]+))?/(?P<db>[^\?]+)(\?sslmode=(?P<sslmode>.+))?$')
def __init__(self,db,uri,pool_size=0,folder=None,db_codec ='UTF-8',
credential_decoder=IDENTITY, driver_args={},
adapter_args={}, do_connect=True, after_connection=None):
self.db = db
self.dbengine = "sapdb"
self.uri = uri
if do_connect: self.find_driver(adapter_args,uri)
self.pool_size = pool_size
self.folder = folder
self.db_codec = db_codec
self._after_connection = after_connection
self.find_or_make_work_folder()
ruri = uri.split('://',1)[1]
m = self.REGEX_URI.match(ruri)
if not m:
raise SyntaxError("Invalid URI string in DAL")
user = credential_decoder(m.group('user'))
if not user:
raise SyntaxError('User required')
password = credential_decoder(m.group('password'))
if not password:
password = ''
host = m.group('host')
if not host:
raise SyntaxError('Host name required')
db = m.group('db')
if not db:
raise SyntaxError('Database name required')
def connector(user=user, password=password, database=db,
host=host, driver_args=driver_args):
return self.driver.Connection(user, password, database,
host, **driver_args)
self.connector = connector
if do_connect: self.reconnect()
[docs] def lastrowid(self,table):
self.execute("select %s.NEXTVAL from dual" % table._sequence_name)
return long(self.cursor.fetchone()[0])