database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-11 01:42:22 +03:00
Code Activity

Add missing header comments for changes related to the experimental sqlite3_blob_reopen() API.

Browse Source 
FossilOrigin-Name: d1cc5c93f09c9092ec478c04e8d9a8b1f9c0cb04
This commit is contained in:
dan
2010-10-26 11:56:57 +00:00
parent c7c91257d5
commit e3d82a8723
4 changed files with 50 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/vdbeblob.c
View File

@@ -33,16 +33,37 @@ struct Incrblob {
};
/*
** This function is used by both blob_open() and blob_reopen(). It seeks
** the b-tree cursor associated with blob handle p to point to row iRow.
** If successful, SQLITE_OK is returned and subsequent calls to
** sqlite3_blob_read() or sqlite3_blob_write() access the specified row.
**
** If an error occurs, or if the specified row does not exist or does not
** contain a value of type TEXT or BLOB in the column nominated when the
** blob handle was opened, then an error code is returned and *pzErr may
** be set to point to a buffer containing an error message. It is the
** responsibility of the caller to free the error message buffer using
** sqlite3DbFree().
**
** If an error does occur, then the b-tree cursor is closed. All subsequent
** calls to sqlite3_blob_read(), blob_write() or blob_reopen() will
** immediately return SQLITE_ABORT.
*/
static int blobSeekToRow(Incrblob *p, sqlite3_int64 iRow, char **pzErr){
int rc; /* Error code */
char *zErr = 0; /* Error message */
Vdbe *v = (Vdbe *)p->pStmt;
/* Set the value of the SQL statements only variable to integer iRow.
** This is done directly instead of using sqlite3_bind_int64() to avoid
** triggering asserts related to mutexes.
*/
assert( v->aVar[0].flags&MEM_Int );
v->aVar[0].u.i = iRow;
rc = sqlite3_step(p->pStmt);
rc = sqlite3_step(p->pStmt);
if( rc==SQLITE_ROW ){
Vdbe *v = (Vdbe *)p->pStmt;
u32 type = v->apCsr[0]->aType[p->iCol];
if( type<12 ){
zErr = sqlite3MPrintf(p->db, "cannot open value of type %s",