The session.create "exclusive" configuration works for tables, but not for files.
Here's the test program:
#include <assert.h> #include <stdio.h> #include <stdlib.h> #include <wiredtiger.h> void die(const char *m, int e) { fprintf(stderr, "%s: %s\n", m, wiredtiger_strerror(e)); exit(1); } int main(int argc, char *argv[]) { WT_CONNECTION *conn; WT_SESSION *session; int ret; system("rm -rf WT_TEST && mkdir WT_TEST"); if ((ret = wiredtiger_open("WT_TEST", NULL, "create", &conn)) != 0) die("wiredtiger_open", ret); if ((ret = conn->open_session(conn, NULL, NULL, &session)) != 0) die("conn.open_session", ret); if ((ret = session->create(session, "file:aaa", argv[1])) != 0) die("session.create WT-1", ret); if ((ret = session->create(session, "file:aaa", argv[1])) != 0) die("session.create WT-2", ret); if ((ret = session->create(session, "file:aaa", argv[1])) != 0) die("session.create WT-3", ret); exit (0); }
and it runs cleanly regardless of the exclusive flag:
bengal:thread {130} ./a.out
bengal:thread {131} ./a.out exclusive
A similar test for colgroups (create a table, then try to repeatedly create the colgroup) gives me:
bengal:thread {146} ./a.out
session.create WT-1: WT_DUPLICATE_KEY: attempt to insert an existing key
bengal:thread {147} ./a.out exclusive
session.create WT-1: WT_DUPLICATE_KEY: attempt to insert an existing key
which isn't what I expected?
I didn't try multiple creates of indexes.