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- Transaction Management 12832
- DuckDB supports ACID database transactions . Transactions provide isolation, i.e., changes made by a transaction are not visible from concurrent transactions until it is committed. A transaction can also be aborted, which discards any chang
..., run: COMMIT; If you are not in an active transaction, the COMMIT statement will fail. Rolling Back a Transaction You can abort a transaction. This operation, also known as rolling back, will discard any changes the transaction made to the database....To abort a transaction, run: ROLLBACK; You can also use the abort command, which has an identical behavior: ABORT; If you are not i...n an active transaction, the ROLLBACK and ABORT statements will fail. Multi-Statement Transactions When multiple SQL statements are submitted together (e.g., separated by... - https://man.mtool.work/duckdb/2.0/sql/statements/transactions.html
- Python DB API 8622
- The standard DuckDB Python API provides a SQL interface compliant with the DB-API 2.0 specification described by PEP 249 similar to the SQLite Python API . Connection To use the module, you must first create a DuckDBPyConnection object that
...e methods return the rows not fetched yet. con.complete() runs an open result to its end without reading its rows, and con.abort() cancels it, which fails an open transaction when the statement may write. Both are also functions of the duckdb module....ckdb.ResourceInUseException: Resource In Use Error: connection has an unfinished result from execute(); call complete() or abort(), or fetch until a fetch returns no rows, before other work on this connection, or use a separate connection from cursor(...ction, as the BEGIN , COMMIT and ROLLBACK statements do. Inside a transaction, any statement run with execute() that fails aborts the transaction, including one with a syntax error or one that names a missing table. After that, commit() rolls the tran... - https://man.mtool.work/duckdb/2.0/clients/python/dbapi.html
- Appender 8254
- Use an appender to insert rows that your Python code produces. It collects rows and writes them together in one SQL statement; this is called flushing. The with block below flushes on successful exit: import duckdb con = duckdb.connect() co
...failures discard the rows and raise an exception. An interrupted flush inside your transaction keeps its buffered rows but aborts the transaction. Roll back before retrying. Start a new transaction if the retry must be part of one. If you press Ctrl-C...lling flush() : call con.fetchall() , call con.fetchone() repeatedly until it returns None , or call con.complete() or con.abort() .... - https://man.mtool.work/duckdb/2.0/clients/python/appender.html
- Migrating Python Code to DuckDB 2.0 8254
- This page lists what Python code written for DuckDB 1.x must change to run on DuckDB 2.0. Each item gives the 1.x form, the 2.0 form and the page that explains it. For changes outside the Python client, see Migrating to DuckDB v2.0 . Python
...on the connection raises a ResourceInUseException until the result is read to its end or ended with con.complete() or con.abort() , and the next execute() replaces the open result. See Open Results . One connection in several threads. 1.x: calls from...ailed with a catalog, binder or parser error left the transaction usable. 2.0: any statement run with execute() that fails aborts the transaction: con.commit() then rolls it back, and any other statement raises a TransactionException until con.rollbac... - https://man.mtool.work/duckdb/2.0/clients/python/migration.html
- Python Client API 7960
- Connection class duckdb. Appender Bases: object append_row ( self , * args ) → None Buffer one row, one value per column, each converted as an executemany parameter would be append_rows ( self , rows : object ) → None Buffer each row of an
...ffered since the last flush with one statement on the appender's connection class duckdb. DuckDBPyConnection Bases: object abort ( self ) → None Cancel the rest of the result of execute(); a statement that may write fails an open transaction append (...ue ( * args : ValueOrExpr ) → StrExpr The json_value function. Arguments: path. SQL: json_value . Module Functions duckdb. abort ( * , connection : _duckdb.DuckDBPyConnection | None = None ) → None Cancel the rest of the result of execute(); a stateme... - https://man.mtool.work/duckdb/2.0/clients/python/reference/
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