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# This file is part of GNU Enterprise. |
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# |
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# GNU Enterprise is free software; you can redistribute it |
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# and/or modify it under the terms of the GNU General Public |
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# License as published by the Free Software Foundation; either |
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# version 2, or(at your option) any later version. |
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# |
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# GNU Enterprise is distributed in the hope that it will be |
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# useful, but WITHOUT ANY WARRANTY; without even the implied |
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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# PURPOSE. See the GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public |
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# License along with program; see the file COPYING. If not, |
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# write to the Free Software Foundation, Inc., 59 Temple Place |
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# - Suite 330, Boston, MA 02111-1307, USA. |
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# |
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# Copyright 2000-2003 Free Software Foundation |
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# |
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# FILE: |
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# Introspection.py |
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# DESCRIPTION: |
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# NOTES: |
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__all__ = ['Introspection'] |
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import string |
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from string import lower, join, split |
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import sys |
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from gnue.common.apps import GDebug, GConfig |
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from gnue.common.apps import GDebug, GConfig |
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from gnue.common.datasources import GIntrospection |
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class Introspection(GIntrospection.Introspection): |
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# list of the types of Schema objects this driver provides |
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types = [ ('user_table', _('User Tables'),1), |
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('user_view', _('User Views'),1), |
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('user_synonym', _('User Synonyms'),1), |
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('all_table', _('System Tables'),1), |
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('all_view', _('System Views'),1), |
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('all_synonym', _('System Synonyms'),1) ] |
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# |
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# TODO: This is a quick hack to get this class |
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# TODO: into the new-style schema format. |
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# TODO: getSchema* should be merged into find() |
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# |
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def find(self, name=None, type=None): |
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if name is None: |
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return self.getSchemaList(type) |
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else: |
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rs = self.getSchemaByName(name, type) |
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if rs: |
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return [rs] |
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else: |
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return None |
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# TODO: Merge into find() |
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# Return a list of Schema objects |
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# Return a list of Schema objects |
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def getSchemaList(self, type=None): |
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where_user = "" |
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if type == None: |
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where_type = ['TABLE', 'VIEW', 'SYNONYM'] |
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else: |
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scope, type = string.split(type,'_') |
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where_type = [string.upper(type)] |
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if scope == 'user': |
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where_user = " AND OWNER = USER" |
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statement = \ |
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"select owner||'.'||table_name||'.'||table_type full_name, \n" + \ |
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" decode(owner,user,null,owner||'.')||table_name table_name, \n" + \ |
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" decode(owner,user,'user_','all_')||lower(table_type) table_type \n" + \ |
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" from all_catalog where table_type in ('%s') %s \n" \ |
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% (string.join(where_type,"','"), where_user) + \ |
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" order by table_name " |
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GDebug.printMesg(5,statement) |
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cursor = self._connection.native.cursor() |
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cursor.execute(statement) |
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list = [] |
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for rs in cursor.fetchall(): |
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list.append(GIntrospection.Schema(attrs={'id':rs[0], 'name':string.lower(rs[1]), |
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'type':rs[2]}, |
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getChildSchema=self.__getFieldSchema)) |
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cursor.close() |
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return list |
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# Find a schema object with specified name |
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def getSchemaByName(self, name, type=None): |
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spl = string.split(string.upper(name),'.') |
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where = "TABLE_NAME='%s'" % spl[-1] |
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if len(spl) > 1: |
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where += " AND OWNER='%s'" % spl[-2] |
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statement = \ |
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"select owner||'.'||table_name||'.'||table_type full_name, \n" + \ |
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" decode(owner,user,null,owner||'.')||table_name table_name, \n" + \ |
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" decode(owner,user,'user_','all_')||lower(table_type) table_type \n" + \ |
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" from all_catalog where %s " \ |
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% (where) |
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GDebug.printMesg(5,statement) |
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cursor = self._connection.native.cursor() |
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cursor.execute(statement) |
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list = [] |
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rs = cursor.fetchone() |
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if rs: |
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rv = GIntrospection.Schema(attrs={'id':rs[0], 'name':string.lower(rs[1]), |
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'type':rs[2]}, |
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getChildSchema=self.__getFieldSchema) |
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else: |
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rv = None |
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cursor.close() |
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return rv |
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# Get fields for a table |
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def __getFieldSchema(self, parent): |
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owner, name, type = string.split(parent.id,'.') |
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cursor = self._connection.native.cursor() |
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if type == 'SYNONYM': |
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statement = "select table_owner, table_name, " + \ |
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"decode(db_link,null,'','@'||db_link) name " + \ |
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"from all_synonyms " + \ |
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"where owner = '%s' and synonym_name='%s'" % (owner, name) |
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GDebug.printMesg(5,statement) |
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cursor.execute(statement) |
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rs = cursor.fetchone() |
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owner, name, link = rs |
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if link is None: |
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link = "" |
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else: |
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link = "" |
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statement = \ |
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"select owner||'.'||table_name||'.'||column_name||'.%s', " % (link) + \ |
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"column_name, data_type, nullable, data_length, data_scale, data_precision " + \ |
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"from all_tab_columns%s " % (link) + \ |
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"where owner = '%s' and table_name = '%s' " % (owner, name) + \ |
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"order by column_id" |
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GDebug.printMesg(5,statement) |
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cursor.execute(statement) |
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list = [] |
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for rs in cursor.fetchall(): |
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attrs={'id': rs[0], 'name': string.lower(rs[1]), |
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'type':'field', 'nativetype': rs[2], |
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'required': rs[3] == 'N'} |
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if rs[2] in ('NUMBER',): |
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attrs['precision'] = int(rs[5]) |
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attrs['datatype'] = 'number' |
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attrs['length'] = int(rs[6]) |
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elif rs[2] in ('DATE',): |
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attrs['datatype'] = 'date' |
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else: |
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attrs['datatype'] = 'text' |
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if int(rs[4]): |
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attrs['length'] = int(rs[4]) |
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list.append(GIntrospection.Schema(attrs=attrs)) |
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cursor.close() |
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return tuple(list) |
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