author | Gareth Stockwell <gareth.stockwell@accenture.com> |
Wed, 22 Sep 2010 20:10:53 +0100 | |
branch | graphics-phase-3 |
changeset 113 | b842c0cb760e |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
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# Mimic the sqlite3 console shell's .dump command |
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# Author: Paul Kippes <kippesp@gmail.com> |
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|
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def _iterdump(connection): |
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""" |
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Returns an iterator to the dump of the database in an SQL text format. |
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|
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Used to produce an SQL dump of the database. Useful to save an in-memory |
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database for later restoration. This function should not be called |
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directly but instead called from the Connection method, iterdump(). |
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""" |
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12 |
|
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cu = connection.cursor() |
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yield('BEGIN TRANSACTION;') |
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15 |
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# sqlite_master table contains the SQL CREATE statements for the database. |
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q = """ |
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SELECT name, type, sql |
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FROM sqlite_master |
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WHERE sql NOT NULL AND |
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type == 'table' |
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""" |
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schema_res = cu.execute(q) |
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for table_name, type, sql in schema_res.fetchall(): |
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if table_name == 'sqlite_sequence': |
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yield('DELETE FROM sqlite_sequence;') |
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elif table_name == 'sqlite_stat1': |
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yield('ANALYZE sqlite_master;') |
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elif table_name.startswith('sqlite_'): |
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continue |
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# NOTE: Virtual table support not implemented |
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#elif sql.startswith('CREATE VIRTUAL TABLE'): |
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# qtable = table_name.replace("'", "''") |
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# yield("INSERT INTO sqlite_master(type,name,tbl_name,rootpage,sql)"\ |
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# "VALUES('table','%s','%s',0,'%s');" % |
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# qtable, |
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# qtable, |
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# sql.replace("''")) |
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else: |
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yield('%s;' % sql) |
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|
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# Build the insert statement for each row of the current table |
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res = cu.execute("PRAGMA table_info('%s')" % table_name) |
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column_names = [str(table_info[1]) for table_info in res.fetchall()] |
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q = "SELECT 'INSERT INTO \"%(tbl_name)s\" VALUES(" |
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q += ",".join(["'||quote(" + col + ")||'" for col in column_names]) |
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q += ")' FROM '%(tbl_name)s'" |
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query_res = cu.execute(q % {'tbl_name': table_name}) |
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for row in query_res: |
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yield("%s;" % row[0]) |
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# Now when the type is 'index', 'trigger', or 'view' |
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q = """ |
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SELECT name, type, sql |
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FROM sqlite_master |
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WHERE sql NOT NULL AND |
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type IN ('index', 'trigger', 'view') |
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""" |
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schema_res = cu.execute(q) |
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for name, type, sql in schema_res.fetchall(): |
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yield('%s;' % sql) |
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|
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yield('COMMIT;') |