Function sqlite3_step

pub unsafe fn sqlite3_step(stmt: *mut sqlite3_stmt) -> c_int

After a prepared statement has been prepared using any of sqlite3_prepare_v2(), sqlite3_prepare_v3(), sqlite3_prepare16_v2(), or sqlite3_prepare16_v3() or one of the legacy interfaces sqlite3_prepare() or sqlite3_prepare16(), this function must be called one or more times to evaluate the statement.

See https://www.sqlite.org/c3ref/step.html