Attempt to write a readonly database python

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Attempt to write a readonly database python

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.

attempt to write a readonly database python

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: The term "error code" means any result code other than these three. The least significant 8 bits of the result code define a broad category and are called the "primary result code".

More significant bits provide more detailed information about the error and are called the "extended result code" Note that the primary result code is always a part of the extended result code. Given a full bit extended result code, the application can always find the corresponding primary result code merely by extracting the least significant 8 bits of the extended result code.

All extended result codes are also error codes. Hence the terms "extended result code" and "extended error code" are interchangeable. For historic compatibility, the C-language interfaces return primary result codes by default.

Definitions All result codes are integers. Symbolic names for all result codes are created using " define" macros in the sqlite3. There are separate sections in the sqlite3. The names and numeric values for existing result codes are fixed and unchanging.

However, new result codes, and especially new extended result codes, might appear in future releases of SQLite. Most other result codes indicate an error.

Attempt to write a readonly database 错误 - 爱程序网

In a working version of SQLite, an application should never see this result code. If application does encounter this result code, it shows that there is a bug in the database engine.

SQLite does not currently generate this result code. However, application-defined SQL functions or virtual tablesor VFSesor other extensions might cause this result code to be returned. Process B will need to wait for process A to finish its transaction before starting a new transaction.

For example, a DROP TABLE statement cannot be run while another thread is reading from that table on the same database connection because dropping the table would delete the table out from under the concurrent reader. Note that this error can occur when trying to write information into the main database file, or it can also occur when writing into temporary disk files.

Sometimes applications encounter this error even though there is an abundance of primary disk space because the error occurs when writing into temporary disk files on a system where temporary files are stored on a separate partition with much less space that the primary disk.

The file in question might be a primary database file or on of several temporary disk files. There is a race condition that can occur when two separate database connections both try to start a transaction at the same time in WAL mode.

The loser of the race backs off and tries again, after a brief delay. If the database schema was changed by some other process in between the time that the statement was prepared and the time the statement was run, this error can result.

The maximum length of an SQL statement defaults to a much smaller value of 1, bytes. SQLite is normally very forgiving about mismatches between the type of a value and the declared type of the container in which that value is to be stored.

But in a few cases, SQLite is strict about types. The rowid of a table must be an integer. SQLite tries to detect misuse and report the misuse using this result code. However, there is no guarantee that the detection of misuse will be successful.

Misuse detection is probabilistic. The default behavior is for that extension to be automatically unloaded when the database connection closes.

Sqlite3 - Change SQLite database mode to read-write - Stack Overflow

This error might result from a hardware malfunction or because a filesystem came unmounted while the file was open. This can serve as a warning to application designers that the database might benefit from additional indexes.

Pending write operations always fail with this error when a rollback occurs. Process A keeps the transaction open. Process B updates the database, changing values previous read by process A. Process A now tries to write to the database.

This might be due to a truncated file. In other words, this code indicates a problem with the fsync system call in unix or the FlushFileBuffers system call in windows.Windows Wally answers your questions about ATTEMPTED_WRITE_TO_READONLY_MEMORY or STOP 0xBE issues and tells you how to troubleshoot your PC in a few easy steps!" The blog of Windows Wally, a Windows Support Technician helping .

SQLite - attempt to write a readonly database Hi Experts, I'm using Windows 7, opening an sqlite file in my documents folder with VS and the amalgamation of sqlite .

Don't forget to use WikiFormatting when writing in Trac.. I wonder why the SQLite database is read-only. It should be writeable, assuming you used "sudo" when installing. Attach the if that doesn't help you resolve the problem.

Linux el6.x86_64 #1 SMP Tue Dec 6 GMT x86_64 x86_64 x86_64 GNU/Linux. Oct 25,  · Just upgraded to from 11, the upgrade took eternity and after it was done I am seeing db and python errors (after getting a message that MIDDLEWARED failed to start) during boot-up which makes me very uneasy. Apr 10,  · Bruce, The SQLite database is used to keep track of which ancillary files are required by the files to be processed.

Once the database is populated for a given file, subsequent runs only check the local database, and do not connect to our servers to do the ancillary file lookup.

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