Re: Statistics Import and Export

    /*
     * For indexes, we follow what do_analyze_rel() does so as to avoid any
     * deadlocks with analyze/vacuum, which is to take out a
     * ShareUpdateExclusive on table/matview first and only after that take
     * a a AccessShareLock on the index itself.
     */
there are two "a a".


 #include "access/relation.h"
+#include "c.h"
+#include "catalog/pg_class_d.h"
 #include "catalog/pg_database.h"
+#include "catalog/index.h"
+#include "storage/lockdefs.h"
+#include "storage/lmgr.h"
 #include "utils/acl.h"
+#include "utils/lsyscache.h"
 #include "utils/rel.h"
+#include "utils/syscache.h"

+#include "c.h", no need. since we have "postgres.h"
+#include "storage/lockdefs.h" no need. because #include
"storage/lmgr.h" already have it.
+#include "utils/syscache.h" no need. because get_rel_relkind is in
``#include "utils/lsyscache.h"``


in pg_class.h we have
#include "catalog/pg_class_d.h" /* IWYU pragma: export */
if i read
https://github.com/include-what-you-use/include-what-you-use/blob/master/docs/IWYUPragmas.md#iwyu-pragma-export
correctly.
here
+#include "catalog/pg_class_d.h"
should be
+#include "catalog/pg_class.h"