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Connection
Connection API documentation
Connection objects manage connections to the database. Each manages a single ODBC HDBC. There is no constructor; Connections can only be created by the module's connect function. variablesautocommitTrue if the connection is in autocommit mode; False otherwise. Changing this value updates the ODBC autocommit setting. searchescapeThe ODBC search pattern escape character, as returned by SQLGetInfo(SQL_SEARCH_PATTERN_ESCAPE), used to escape special characters such as '%' and ''. These are driver specific. timeoutAn optional integer query timeout, in seconds. Use zero, the default, to disable. The timeout is applied to all cursors created by the connection, so it cannot be changed for a given connection. If a query timeout occurs, the database should raise an OperationalError with SQLSTATE HYT00 or HYT01. Note: This attribute only affects queries. To set the timeout for the actual connection process, use the timeout keyword of the pyodbc.connect function. methodscursorcnxn.cursor() --> Cursor Returns a new Cursor Object using the connection. pyodbc supports multiple cursors per connection but your database may not. commitcnxn.commit() Commits any pending transaction to the database. Pending transactions are automatically rolled back when a connection is closed, so be sure to call this. rollbackcnxn.rollback() Causes the the database to roll back to the start of any pending transaction. You can call this even if no work has been performed on the cursor, allowing it to be used in finally statements, etc. closecnxn.close() Closes the connection. Connections are automatically closed when they are deleted, but you should call this if the connection is referenced in more than one place. The connection will be unusable from this point forward and a ProgrammingError will be raised if any operation is attempted with the connection. The same applies to all cursor objects trying to use the connection. Note that closing a connection without committing the changes first will cause an implicit rollback to be performed. getinfogetinfo(type) --> str | int | bool Returns general information about the driver and data source associated with a connection by calling SQLGetInfo and returning its results. See Microsoft's SQLGetInfo documentation for the types of information. The supported types and data type of the return values are:
executeexecute(sql, *params) --> Cursor Create a new Cursor object, call its execute method, and returns it. See Cursor.execute for more details. This is a convenience method that is not part of the DB API. Since a new Cursor is allocated by each call, this should not be used if more than one SQL statement needs to be executed. add_output_converteradd_output_converter(sqltype, func) Register an output converter function that will be called whenever a value with the given SQL type is read from the database. sqltype The integer SQL type value to convert, which can be one of the defined standard constants (e.g. pyodbc.SQL_VARCHAR) or a database-specific value (e.g. -151 for the SQL Server 2008 geometry data type). func The converter function which will be called with a single parameter, the value, and should return the converted value. If the value is NULL, the parameter will be None. Otherwise it will be a Python string. clear_output_convertersclear_output_converters() Remove all output converter functions. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Hi, I want to know if i can customize the number of SQL_MAX_COLUMN_NAME_LEN. Because 30 is too small in my application.
You cannot customize these numbers. The value is determined by the database - you use SQL_MAX_COLUMN_NAME_LEN simply to ask the database what its maximum size is.
\COPY command of postgresql is giving error "pyodbc.Error: ('HY000', 'HY000? ERROR: syntax error at or near "\\" at character 7;\nError while executing the query (7) (SQLExecDirectW)')"
please Help Thanks in advance
The sentence "True if the connection is in autocommit mode; False otherwise. Changing this value updates the ODBC autocommit setting."
is wrong in Version 1.3.3. The autocommit is only set during connect. Changing the autocommit member has no effect.
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