mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-26 13:12:30 -06:00
70 lines
2.7 KiB
Python
70 lines
2.7 KiB
Python
# Mimic the sqlite3 console shell's .dump command
|
|
# Author: Paul Kippes <kippesp@gmail.com>
|
|
|
|
# Every identifier in sql is quoted based on a comment in sqlite
|
|
# documentation "SQLite adds new keywords from time to time when it
|
|
# takes on new features. So to prevent your code from being broken by
|
|
# future enhancements, you should normally quote any identifier that
|
|
# is an English language word, even if you do not have to."
|
|
|
|
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'
|
|
ORDER BY "name"
|
|
"""
|
|
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','{0}','{0}',0,'{1}');".format(
|
|
# qtable,
|
|
# sql.replace("''")))
|
|
else:
|
|
yield('%s;' % sql)
|
|
|
|
# Build the insert statement for each row of the current table
|
|
table_name_ident = table_name.replace('"', '""')
|
|
res = cu.execute('PRAGMA table_info("{0}")'.format(table_name_ident))
|
|
column_names = [str(table_info[1]) for table_info in res.fetchall()]
|
|
q = """SELECT 'INSERT INTO "{0}" VALUES({1})' FROM "{0}";""".format(
|
|
table_name_ident,
|
|
",".join("""'||quote("{0}")||'""".format(col.replace('"', '""')) for col in column_names))
|
|
query_res = cu.execute(q)
|
|
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;')
|