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authorGerhard Häring <gh@ghaering.de>2008-03-29 00:41:18 (GMT)
committerGerhard Häring <gh@ghaering.de>2008-03-29 00:41:18 (GMT)
commitb1b9382d91e4b2e863225179cde4a61f0300a233 (patch)
treecd3f0aafbe333586cb5b51710a479da6531d9f56 /Lib
parentbbe741dd1b15e9b496028732afb5f99a2a960695 (diff)
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Added missing files for new iterdump method.
Diffstat (limited to 'Lib')
-rw-r--r--Lib/sqlite3/dump.py63
-rw-r--r--Lib/sqlite3/test/dump.py52
2 files changed, 115 insertions, 0 deletions
diff --git a/Lib/sqlite3/dump.py b/Lib/sqlite3/dump.py
new file mode 100644
index 0000000..409a405
--- /dev/null
+++ b/Lib/sqlite3/dump.py
@@ -0,0 +1,63 @@
+# Mimic the sqlite3 console shell's .dump command
+# Author: Paul Kippes <kippesp@gmail.com>
+
+def _iterdump(connection):
+ """
+ Returns an iterator to the dump of the database in an SQL text format.
+
+ Used to produce an SQL dump of the database. Useful to save an in-memory
+ database for later restoration. This function should not be called
+ directly but instead called from the Connection method, iterdump().
+ """
+
+ cu = connection.cursor()
+ yield('BEGIN TRANSACTION;')
+
+ # sqlite_master table contains the SQL CREATE statements for the database.
+ q = """
+ SELECT name, type, sql
+ FROM sqlite_master
+ WHERE sql NOT NULL AND
+ type == 'table'
+ """
+ schema_res = cu.execute(q)
+ for table_name, type, sql in schema_res.fetchall():
+ if table_name == 'sqlite_sequence':
+ yield('DELETE FROM sqlite_sequence;')
+ elif table_name == 'sqlite_stat1':
+ yield('ANALYZE sqlite_master;')
+ elif table_name.startswith('sqlite_'):
+ continue
+ # NOTE: Virtual table support not implemented
+ #elif sql.startswith('CREATE VIRTUAL TABLE'):
+ # qtable = table_name.replace("'", "''")
+ # yield("INSERT INTO sqlite_master(type,name,tbl_name,rootpage,sql)"\
+ # "VALUES('table','%s','%s',0,'%s');" %
+ # qtable,
+ # qtable,
+ # sql.replace("''"))
+ else:
+ yield('%s;' % sql)
+
+ # Build the insert statement for each row of the current table
+ res = cu.execute("PRAGMA table_info('%s')" % table_name)
+ column_names = [str(table_info[1]) for table_info in res.fetchall()]
+ q = "SELECT 'INSERT INTO \"%(tbl_name)s\" VALUES("
+ q += ",".join(["'||quote(" + col + ")||'" for col in column_names])
+ q += ")' FROM '%(tbl_name)s'"
+ query_res = cu.execute(q % {'tbl_name': table_name})
+ for row in query_res:
+ yield("%s;" % row[0])
+
+ # Now when the type is 'index', 'trigger', or 'view'
+ q = """
+ SELECT name, type, sql
+ FROM sqlite_master
+ WHERE sql NOT NULL AND
+ type IN ('index', 'trigger', 'view')
+ """
+ schema_res = cu.execute(q)
+ for name, type, sql in schema_res.fetchall():
+ yield('%s;' % sql)
+
+ yield('COMMIT;')
diff --git a/Lib/sqlite3/test/dump.py b/Lib/sqlite3/test/dump.py
new file mode 100644
index 0000000..f40876a
--- /dev/null
+++ b/Lib/sqlite3/test/dump.py
@@ -0,0 +1,52 @@
+# Author: Paul Kippes <kippesp@gmail.com>
+
+import unittest
+import sqlite3 as sqlite
+
+class DumpTests(unittest.TestCase):
+ def setUp(self):
+ self.cx = sqlite.connect(":memory:")
+ self.cu = self.cx.cursor()
+
+ def tearDown(self):
+ self.cx.close()
+
+ def CheckTableDump(self):
+ expected_sqls = [
+ "CREATE TABLE t1(id integer primary key, s1 text, " \
+ "t1_i1 integer not null, i2 integer, unique (s1), " \
+ "constraint t1_idx1 unique (i2));"
+ ,
+ "INSERT INTO \"t1\" VALUES(1,'foo',10,20);"
+ ,
+ "INSERT INTO \"t1\" VALUES(2,'foo2',30,30);"
+ ,
+ "CREATE TABLE t2(id integer, t2_i1 integer, " \
+ "t2_i2 integer, primary key (id)," \
+ "foreign key(t2_i1) references t1(t1_i1));"
+ ,
+ "CREATE TRIGGER trigger_1 update of t1_i1 on t1 " \
+ "begin " \
+ "update t2 set t2_i1 = new.t1_i1 where t2_i1 = old.t1_i1; " \
+ "end;"
+ ,
+ "CREATE VIEW v1 as select * from t1 left join t2 " \
+ "using (id);"
+ ]
+ [self.cu.execute(s) for s in expected_sqls]
+ i = self.cx.iterdump()
+ actual_sqls = [s for s in i]
+ expected_sqls = ['BEGIN TRANSACTION;'] + expected_sqls + \
+ ['COMMIT;']
+ [self.assertEqual(expected_sqls[i], actual_sqls[i])
+ for i in range(len(expected_sqls))]
+
+def suite():
+ return unittest.TestSuite(unittest.makeSuite(DumpTests, "Check"))
+
+def test():
+ runner = unittest.TextTestRunner()
+ runner.run(suite())
+
+if __name__ == "__main__":
+ test()