NAME
sqlite3changeset_pk —
Obtain The
Primary Key Definition Of A Table
SYNOPSIS
int
sqlite3changeset_pk(
sqlite3_changeset_iter
*pIter,
unsigned char **pabPK,
int
*pnCol );
DESCRIPTION
For each modified table, a changeset includes the following:
- The number of columns in the table, and
- Which of those columns make up the tables PRIMARY
KEY.
This function is used to find which columns comprise the PRIMARY KEY of the
table modified by the change that iterator pIter currently points to. If
successful, *pabPK is set to point to an array of nCol entries, where nCol is
the number of columns in the table. Elements of *pabPK are set to 0x01 if the
corresponding column is part of the tables primary key, or 0x00 if it is not.
If argument pnCol is not NULL, then *pnCol is set to the number of columns in
the table.
If this function is called when the iterator does not point to a valid entry,
SQLITE_MISUSE is returned and the output variables zeroed. Otherwise,
SQLITE_OK is returned and the output variables populated as described
above.