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gh-64662: Add virtual table support to sqlite3.Connection.iterdump (#108340)

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Co-authored-by: Aviv Palivoda <palaviv@gmail.com>
This commit is contained in:
Erlend E. Aasland 2023-08-28 00:18:32 +02:00 • committed by GitHub
parent fecb9faf0b
commit d0160c7c22
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4 changed files with 38 additions and 7 deletions
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20
Lib/sqlite3/dump.py
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@ -24,6 +24,7 @@ def _iterdump(connection):
directly but instead called from the Connection method, iterdump().
"""
writeable_schema = False
cu = connection.cursor()
yield('BEGIN TRANSACTION;')
@ -50,13 +51,15 @@ def _iterdump(connection):
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("''")))
elif sql.startswith('CREATE VIRTUAL TABLE'):
if not writeable_schema:
writeable_schema = True
yield('PRAGMA writable_schema=ON;')
yield("INSERT INTO sqlite_master(type,name,tbl_name,rootpage,sql)"
"VALUES('table',{0},{0},0,{1});".format(
_quote_value(table_name),
_quote_value(sql),
))
else:
yield('{0};'.format(sql))
@ -85,6 +88,9 @@ def _iterdump(connection):
for name, type, sql in schema_res.fetchall():
yield('{0};'.format(sql))
if writeable_schema:
yield('PRAGMA writable_schema=OFF;')
# gh-79009: Yield statements concerning the sqlite_sequence table at the
# end of the transaction.
for row in sqlite_sequence: