On Mon, 2007-03-26 at 17:08 +0200, Vivien Malerba wrote: > On 3/26/07, Martin Jenkins <[EMAIL PROTECTED]> wrote: > > Vivien Malerba wrote: > > > Hi! > > > > > > I've got an error reporting problem when trying to insert a row which > > > breaks a UNIQUE constraint in a table in a C program, I get the > > > following error with sqlite3_errmsg(): > > > "SQL logic error or missing database" > > > > > > If I fire the sqlite3 program and run the same SQL query, I get the > > > following error: > > > "SQL error: column name is not unique" > > > which is much more obvious to understand. > > > > > > Any idea how I could get that error message calling sqlite3_errmsg()? > > > > The pysqlite wrapper has a bug which reports the same error message if > > you try to nest transactions. I fixed the wrapper (locally) by adding an > > sqlite_reset(). I think there's a new API (sqlite_prepare_v2()?) which > > has the same effect. If you can't search (say) gmane then post a tiny > > code snippet and someone who uses the C API more than I do will spot the > > problem straight away. > > Here is a sample test case, just uncompress, run "make" and "./test". > Here is what I get using SQLite 3.3.13 (On Linux): > SQL error (step): SQL logic error or missing database > SQL error (step): column name is not unique > > It shows that calling sqlite3_reset() seems to be required (contrary > to what the doc says), or maybe I got something wrong...
Even using the prepare_v2() interface, the database handle error-code and error-message (the stuff returned by sqlite3_errcode() and sqlite3_errmsg() respectively) are not populated by sqlite3_step(). After sqlite3_step() reports an error you need to call either sqlite3_reset() or sqlite3_finalize() to copy the error-code and message from the statement to the database handle. The change the prepare_v2() API makes is that in your example sqlite3_step() returns SQLITE_CONSTRAINT when it hits the constraint. Using sqlite3_prepare() it would have returned the generic SQLITE_ERROR. Dan. ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
