# -*- coding: utf-8 -*-
import re
from .._globals import IDENTITY
from ..objects import Expression
from .base import BaseAdapter
[docs]class FireBirdAdapter(BaseAdapter):
drivers = ('kinterbasdb','firebirdsql','fdb','pyodbc')
commit_on_alter_table = True
support_distributed_transaction = True
types = {
'boolean': 'CHAR(1)',
'string': 'VARCHAR(%(length)s)',
'text': 'BLOB SUB_TYPE 1',
'json': 'BLOB SUB_TYPE 1',
'password': 'VARCHAR(%(length)s)',
'blob': 'BLOB SUB_TYPE 0',
'upload': 'VARCHAR(%(length)s)',
'integer': 'INTEGER',
'bigint': 'BIGINT',
'float': 'FLOAT',
'double': 'DOUBLE PRECISION',
'decimal': 'DECIMAL(%(precision)s,%(scale)s)',
'date': 'DATE',
'time': 'TIME',
'datetime': 'TIMESTAMP',
'id': 'INTEGER PRIMARY KEY',
'reference': 'INTEGER REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
'list:integer': 'BLOB SUB_TYPE 1',
'list:string': 'BLOB SUB_TYPE 1',
'list:reference': 'BLOB SUB_TYPE 1',
'big-id': 'BIGINT PRIMARY KEY',
'big-reference': 'BIGINT REFERENCES %(foreign_key)s ON DELETE %(on_delete_action)s',
}
[docs] def sequence_name(self,tablename):
return ('genid_' + self.QUOTE_TEMPLATE) % tablename
[docs] def trigger_name(self,tablename):
return 'trg_id_%s' % tablename
[docs] def RANDOM(self):
return 'RAND()'
[docs] def EPOCH(self, first):
return "DATEDIFF(second, '1970-01-01 00:00:00', %s)" % self.expand(first)
[docs] def NOT_NULL(self,default,field_type):
return 'DEFAULT %s NOT NULL' % self.represent(default,field_type)
[docs] def SUBSTRING(self,field,parameters):
return 'SUBSTRING(%s from %s for %s)' % (self.expand(field), parameters[0], parameters[1])
[docs] def LENGTH(self, first):
return "CHAR_LENGTH(%s)" % self.expand(first)
[docs] def CONTAINS(self,first,second,case_sensitive=False):
if first.type.startswith('list:'):
second = Expression(None,self.CONCAT('|',Expression(
None,self.REPLACE(second,('|','||'))),'|'))
return '(%s CONTAINING %s)' % (self.expand(first),
self.expand(second, 'string'))
def _drop(self,table,mode):
sequence_name = table._sequence_name
return ['DROP TABLE %s %s;' % (table.sqlsafe, mode), 'DROP GENERATOR %s;' % sequence_name]
[docs] def select_limitby(self, sql_s, sql_f, sql_t, sql_w, sql_o, limitby):
if limitby:
(lmin, lmax) = limitby
sql_s = ' FIRST %i SKIP %i %s' % (lmax - lmin, lmin, sql_s)
return 'SELECT %s %s FROM %s%s%s;' % (sql_s, sql_f, sql_t, sql_w, sql_o)
def _truncate(self,table,mode = ''):
return ['DELETE FROM %s;' % table._tablename,
'SET GENERATOR %s TO 0;' % table._sequence_name]
REGEX_URI = re.compile('^(?P<user>[^:@]+)(\:(?P<password>[^@]*))?@(?P<host>\[[^/]+\]|[^\:/]+)(\:(?P<port>[0-9]+))?/(?P<db>.+?)(\?set_encoding=(?P<charset>\w+))?$')
def __init__(self,db,uri,pool_size=0,folder=None,db_codec ='UTF-8',
credential_decoder=IDENTITY, driver_args={},
adapter_args={}, do_connect=True, after_connection=None):
self.db = db
self.dbengine = "firebird"
self.uri = uri
if do_connect: self.find_driver(adapter_args,uri)
self.pool_size = pool_size
self.folder = folder
self.db_codec = db_codec
self._after_connection = after_connection
self.find_or_make_work_folder()
ruri = uri.split('://',1)[1]
m = self.REGEX_URI.match(ruri)
if not m:
raise SyntaxError("Invalid URI string in DAL: %s" % self.uri)
user = credential_decoder(m.group('user'))
if not user:
raise SyntaxError('User required')
password = credential_decoder(m.group('password'))
if not password:
password = ''
host = m.group('host')
if not host:
raise SyntaxError('Host name required')
port = int(m.group('port') or 3050)
db = m.group('db')
if not db:
raise SyntaxError('Database name required')
charset = m.group('charset') or 'UTF8'
driver_args.update(dsn='%s/%s:%s' % (host,port,db),
user = credential_decoder(user),
password = credential_decoder(password),
charset = charset)
def connector(driver_args=driver_args):
return self.driver.connect(**driver_args)
self.connector = connector
if do_connect: self.reconnect()
[docs] def create_sequence_and_triggers(self, query, table, **args):
tablename = table._tablename
sequence_name = table._sequence_name
trigger_name = table._trigger_name
self.execute(query)
self.execute('create generator %s;' % sequence_name)
self.execute('set generator %s to 0;' % sequence_name)
self.execute('create trigger %s for %s active before insert position 0 as\nbegin\nif(new.id is null) then\nbegin\nnew.id = gen_id(%s, 1);\nend\nend;' % (trigger_name, tablename, sequence_name))
[docs] def lastrowid(self,table):
sequence_name = table._sequence_name
self.execute('SELECT gen_id(%s, 0) FROM rdb$database' % sequence_name)
return long(self.cursor.fetchone()[0])
[docs]class FireBirdEmbeddedAdapter(FireBirdAdapter):
drivers = ('kinterbasdb','firebirdsql','fdb','pyodbc')
REGEX_URI = re.compile('^(?P<user>[^:@]+)(\:(?P<password>[^@]*))?@(?P<path>[^\?]+)(\?set_encoding=(?P<charset>\w+))?$')
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 = "firebird"
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: %s" % self.uri)
user = credential_decoder(m.group('user'))
if not user:
raise SyntaxError('User required')
password = credential_decoder(m.group('password'))
if not password:
password = ''
pathdb = m.group('path')
if not pathdb:
raise SyntaxError('Path required')
charset = m.group('charset')
if not charset:
charset = 'UTF8'
host = ''
driver_args.update(host=host,
database=pathdb,
user=credential_decoder(user),
password=credential_decoder(password),
charset=charset)
def connector(driver_args=driver_args):
return self.driver.connect(**driver_args)
self.connector = connector
if do_connect: self.reconnect()