Result Code Meanings Overview Many of the routines in the SQLite C-language Interface return numeric result codes indicating either success or failure, and in the event of a failure, providing some idea of the cause of the failure. This document strives to explain what each of those numeric result codes means. Result Codes versus Error Codes "Error codes" are a subset of "result codes" that indicate that something has gone wrong. There are only a few non-error result codes:
If the filename is ": This in-memory database will vanish when the database connection is closed. Future versions of SQLite might make use of additional special filenames that begin with the ": It is recommended that when a database filename actually does begin with a ": If the filename is an empty string, then a private, temporary on-disk database will be created.
This private database will be automatically deleted as soon as the database connection is closed.
See " URI filenames " for additional information. If the URI contains an authority, then it must be either an empty string or the string "localhost". If the authority is not an empty string or "localhost", an error is returned to the caller.
The fragment component of a URI, if present, is ignored. On windows, the first component of an absolute path is a drive specification e.
The "vfs" parameter may be used to specify the name of a VFS object that provides the operating system interface that should be used to access the database file on disk. If this option is set to an empty string the default VFS object is used. Specifying an unknown VFS is an error.
The mode parameter may be set to either "ro", "rw", "rwc", or "memory". Attempting to set it to any other value is an error. If the mode option is set to "memory" then a pure in-memory database that never reads or writes from disk is used.
The cache parameter may be set to either "shared" or "private". The psow parameter indicates whether or not the powersafe overwrite property does or does not apply to the storage media on which the database file resides.
The nolock parameter is a boolean query parameter which if set disables file locking in rollback journal modes.
This is useful for accessing a database on a filesystem that does not support locking. The immutable parameter is a boolean query parameter that indicates that the database file is stored on read-only media.
When immutable is set, SQLite assumes that the database file cannot be changed, even by a process with higher privilege, and so the database is opened read-only and all locking and change detection is disabled. Specifying an unknown parameter in the query component of a URI is not an error.
Future versions of SQLite might understand additional query parameters. See " query parameters with special meaning to SQLite " for additional information.#define SQLITE_OK 0 /* Successful result */ /* beginning-of-error-codes */ #define SQLITE_ERROR 1 /* Generic error */ #define SQLITE_INTERNAL 2 /* Internal logic.
I developed an applicaiton that works fine SQLiteException: Attempt to write a read-only database. I have a console application that populates a SQLite database.
When the application runs by itself, I don't get any errors. If I run multiple instances of the application, where each application is in its own folder and each populates its own database I'll occasionally get the following exception.
For SQLite it’s simply deleting db file as SQLite creates db files automatically on connection opening if it doesn’t exist. It turned out that we had some logic with reading data before the deletion of a DB file.
Nov 19, · A copy of your pfmlures.com would be appreciated (the broken one), since of the two copies James was sent so far, neither were corrupted - they both passed the SQLite integrity check. This has led James to think the issue is permissions, not corruption of the DB.
The compiler, however, knows very well a and b are left unmodified in both versions, so whatever optimizations it could apply – eq-Sep 6 '12 at