mirror of https://github.com/python/cpython
64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
# 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;')
|