/* ListColumns
* list writable column names
*
* "names" [ OUT ] - return parameter for namelist
*
* availability: v2.1
*/
static
rc_t list_writable_columns ( VTable *self )
{
rc_t rc;
VCursor *curs;
if ( self -> read_only )
{
self -> write_col_cache_valid = true;
return 0;
}
rc = VTableCreateCursorWriteInt ( self, & curs, kcmInsert, false );
if ( rc == 0 )
{
/* no need for schema-based triggers to fire **/
VCursorSuspendTriggers ( curs );
/* let this private VCursor-function list the columns */
rc = VCursorListWritableColumns ( curs, & self -> write_col_cache );
VCursorRelease ( curs );
if ( rc == 0 )
self -> write_col_cache_valid = true;
}
return rc;
}
LIB_EXPORT rc_t CC VTableListSeededWritableColumns ( VTable *self,
KNamelist **names, const KNamelist *seed )
{
rc_t rc;
if ( names == NULL )
rc = RC ( rcVDB, rcTable, rcListing, rcParam, rcNull );
else
{
* names = NULL;
if ( self == NULL )
rc = RC ( rcVDB, rcTable, rcListing, rcSelf, rcNull );
else if ( seed == NULL )
rc = RC ( rcVDB, rcTable, rcListing, rcParam, rcNull );
else
{
BSTree cache;
BSTreeInit ( & cache );
rc = 0;
if ( ! self -> read_only )
{
VCursor *curs;
rc = VTableCreateCursorWriteInt ( self, & curs, kcmInsert, false );
if ( rc == 0 )
{
/* let this private VCursor-function list the columns */
rc = VCursorListSeededWritableColumns ( curs, & cache, seed );
VCursorRelease ( curs );
}
}
if ( rc == 0 )
rc = make_column_namelist ( & cache, names );
BSTreeWhack ( & cache, VColumnRefWhack, NULL );
}
}
return rc;
}
LIB_EXPORT rc_t CC VTableCreateCursorWrite ( VTable *self, VCursor **cursp, KCreateMode mode )
{
return VTableCreateCursorWriteInt ( self, cursp, mode, true );
}