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Hence why c.execute('PRAGMA wal_checkpoint(FULL)') worked (as would c.execute('PRAGMA main.wal_checkpoint(FULL)')). The initial database's schema is main but isn't required as it's the default if no schema is supplied. Then you could use PRAGMA database2.wal_checkpoint(FULL) if you used ATTACH DATABASE the_database_path AS database2 /*<<<<<<<<<< THE SCHEMA is database2 */ In the documentation the schema is italic, which indicates that it is symbolic rather than an actual value and would be replaced with an appropriate value, the value is used to distinguish between attached databases.Į.g. The message is saying that no database has a schema named schema. Now wondering if the following should be executed at the start.:Ĭ.execute("PRAGMA wal_autocheckpoint = 0") # conn1 = nnect('nifty_tick.db', detect_types=sqlite3.PARSE_DECLTYPES, timeout=20,isolation_level=None)ĭef tick_entry1(inst,timestamp,ltp, bid, ask):Ĭ.execute('INSERT INTO niftyfut (timestamp, close, bid, ask) VALUES (?,?,?,?)',Ĭ.execute('PRAGMA schema.wal_checkpoint(FULL) ')Ĭ.execute('PRAGMA schema.wal_checkpoint(FULL)') Edit

Sqlite3.OperationalError: unknown database schema conn = nnect('tick.db', detect_types=sqlite3.PARSE_DECLTYPES, timeout=20,isolation_level=None)