Obtain new.* Values From A Changeset Iterator
Session Module C Interface#
Obtain new.* Values From A Changeset Iterator#
int sqlite3changeset_new(\ sqlite3_changeset_iter *pIter, /* Changeset iterator */\ int iVal, /* Column number */\ sqlite3_value **ppValue /* OUT: New value (or NULL pointer) */\ );\
The pIter argument passed to this function may either be an iterator passed to a conflict-handler by sqlite3changeset_apply(), or an iterator created by sqlite3changeset_start(). In the latter case, the most recent call to sqlite3changeset_next() must have returned SQLITE_ROW. Furthermore, it may only be called if the type of change that the iterator currently points to is either SQLITE_UPDATE or SQLITE_INSERT. Otherwise, this function returns SQLITE_MISUSE and sets *ppValue to NULL.
Argument iVal must be greater than or equal to 0, and less than the number of columns in the table affected by the current change. Otherwise, SQLITE_RANGE is returned and *ppValue is set to NULL.
If successful, this function sets *ppValue to point to a protected sqlite3_value object containing the iVal'th value from the vector of new row values stored as part of the UPDATE or INSERT change and returns SQLITE_OK. If the change is an UPDATE and does not include a new value for the requested column, *ppValue is set to NULL and SQLITE_OK returned. The name of the function comes from the fact that this is similar to the "new.*" columns available to update or delete triggers.
If some other error occurs (e.g. an OOM condition), an SQLite error code is returned and *ppValue is set to NULL.