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Use without rowid only if supported (closes #523)

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Lonami Exo 2018-01-06 19:35:24 +01:00
parent f357d00911
commit 7745b8e7ee
1 changed files with 34 additions and 24 deletions
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58
telethon/tl/session.py
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@ -107,36 +107,34 @@ class Session:
c.close()
else:
# Tables don't exist, create new ones
c.execute("create table version (version integer)")
c.execute("insert into version values (?)", (CURRENT_VERSION,))
c.execute(
"""create table sessions (
self._create_table(
c,
"version (version integer primary key)"
,
"""sessions (
dc_id integer primary key,
server_address text,
port integer,
auth_key blob
) without rowid"""
)
c.execute(
"""create table entities (
)"""
,
"""entities (
id integer primary key,
hash integer not null,
username text,
phone integer,
name text
) without rowid"""
)
# Save file_size along with md5_digest
# to make collisions even more unlikely.
c.execute(
"""create table sent_files (
)"""
,
"""sent_files (
md5_digest blob,
file_size integer,
file_id integer,
part_count integer,
primary key(md5_digest, file_size)
) without rowid"""
)"""
)
c.execute("insert into version values (?)", (CURRENT_VERSION,))
# Migrating from JSON -> new table and may have entities
if entities:
c.executemany(
@ -170,17 +168,29 @@ class Session:
return [] # No entities
def _upgrade_database(self, old):
c = self._conn.cursor()
if old == 1:
self._conn.execute(
"""create table sent_files (
md5_digest blob,
file_size integer,
file_id integer,
part_count integer,
primary key(md5_digest, file_size)
) without rowid"""
)
self._create_table(c,"""sent_files (
md5_digest blob,
file_size integer,
file_id integer,
part_count integer,
primary key(md5_digest, file_size)
)""")
old = 2
c.close()
def _create_table(self, c, *definitions):
"""
Creates a table given its definition 'name (columns).
If the sqlite version is >= 3.8.2, it will use "without rowid".
See http://www.sqlite.org/releaselog/3_8_2.html.
"""
required = (3, 8, 2)
sqlite_v = tuple(int(x) for x in sqlite3.sqlite_version.split('.'))
extra = ' without rowid' if sqlite_v >= required else ''
for definition in definitions:
c.execute('create table {}{}'.format(definition, extra))
# Data from sessions should be kept as properties
# not to fetch the database every time we need it