.Dd December 19, 2018
.Dt SQLITE3CHANGESET_OLD 3
.Os
.Sh NAME
.Nm sqlite3changeset_old
.Nd Obtain old.* Values From A Changeset Iterator
.Sh SYNOPSIS
.Ft int 
.Fo sqlite3changeset_old
.Fa "sqlite3_changeset_iter *pIter"
.Fa "int iVal"
.Fa "sqlite3_value **ppValue         "
.Fc
.Sh DESCRIPTION
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_DELETE or SQLITE_UPDATE.
Otherwise, this function returns SQLITE_MISUSE and sets
*ppValue to NULL.
.Pp
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.
.Pp
If successful, this function sets *ppValue to point to a protected
sqlite3_value object containing the iVal'th value from the vector of
original row values stored as part of the UPDATE or DELETE change and
returns SQLITE_OK.
The name of the function comes from the fact that this is similar to
the "old.*" columns available to update or delete triggers.
.Pp
If some other error occurs (e.g.
an OOM condition), an SQLite error code is returned and *ppValue is
set to NULL.
.Sh SEE ALSO
.Xr sqlite3changeset_apply 3 ,
.Xr sqlite3changeset_next 3 ,
.Xr sqlite3changeset_start 3 ,
.Xr SQLITE_CREATE_INDEX 3 ,
.Xr SQLITE_OK 3 ,
.Xr SQLITE_CREATE_INDEX 3