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SQLITE3CHANGESET_INVERT(3) Library Functions Manual NAME sqlite3changeset_invert - Invert A Changeset SYNOPSIS int sqlite3changeset_invert(int nIn, const void *pIn, int *pnOut, void **ppOut ); DESCRIPTION This function is used to "invert" a changeset object. Applying an inverted changeset to a database reverses the effects of applying the uninverted changeset. Specifically: ⊕ Each DELETE change is changed to an INSERT, and ⊕ Each INSERT change is changed to a DELETE, and ⊕ For each UPDATE change, the old.* and new.* values are exchanged. This function does not change the order in which changes appear within the changeset. It merely reverses the sense of each individual change. If successful, a pointer to a buffer containing the inverted changeset is stored in *ppOut, the size of the same buffer is stored in *pnOut, and SQLITE_OK is returned. If an error occurs, both *pnOut and *ppOut are zeroed and an SQLite error code returned. It is the responsibility of the caller to eventually call sqlite3_free() on the *ppOut pointer to free the buffer allocation following a successful call to this function. WARNING/TODO: This function currently assumes that the input is a valid changeset. If it is not, the results are undefined. NetBSD 8.99.34 December 19, 2018 NetBSD 8.99.34