Include hash table name in all the internal-error elog messages in

dynahash.c.  Sergey Koposov's current open problem shows the possible
usefulness of this, and it doesn't add much code.

diff --git a/src/backend/utils/hash/dynahash.c b/src/backend/utils/hash/dynahash.c
index 2ced795798abe659252daaad7f20b2092dd313e9..d59f35a5486520816e02d48606250a222bbdc5de 100644 (file)
--- a/src/backend/utils/hash/dynahash.c
+++ b/src/backend/utils/hash/dynahash.c
@@ -26,7 +26,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/utils/hash/dynahash.c,v 1.75 2007/04/26 23:24:44 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/utils/hash/dynahash.c,v 1.76 2007/09/11 16:17:46 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -416,7 +416,7 @@ hash_create(const char *tabname, long nelem, HASHCTL *info, int flags)
 
    /* Build the hash directory structure */
    if (!init_htab(hashp, nelem))
-       elog(ERROR, "failed to initialize hash table");
+       elog(ERROR, "failed to initialize hash table \"%s\"", hashp->tabname);
 
    /*
     * For a shared hash table, preallocate the requested number of elements.
@@ -909,7 +909,8 @@ hash_search_with_hash_value(HTAB *hashp,
 
            /* disallow inserts if frozen */
            if (hashp->frozen)
-               elog(ERROR, "cannot insert into a frozen hashtable");
+               elog(ERROR, "cannot insert into frozen hashtable \"%s\"",
+                    hashp->tabname);
 
            currBucket = get_hash_entry(hashp);
            if (currBucket == NULL)
@@ -1154,9 +1155,10 @@ void
 hash_freeze(HTAB *hashp)
 {
    if (hashp->isshared)
-       elog(ERROR, "cannot freeze shared hashtable");
+       elog(ERROR, "cannot freeze shared hashtable \"%s\"", hashp->tabname);
    if (!hashp->frozen && has_seq_scans(hashp))
-       elog(ERROR, "cannot freeze hashtable with active scans");
+       elog(ERROR, "cannot freeze hashtable \"%s\" because it has active scans",
+            hashp->tabname);
    hashp->frozen = true;
 }
 
@@ -1432,7 +1434,8 @@ static void
 register_seq_scan(HTAB *hashp)
 {
    if (num_seq_scans >= MAX_SEQ_SCANS)
-       elog(ERROR, "too many active hash_seq_search scans");
+       elog(ERROR, "too many active hash_seq_search scans, cannot start one on \"%s\"",
+            hashp->tabname);
    seq_scan_tables[num_seq_scans] = hashp;
    seq_scan_level[num_seq_scans] = GetCurrentTransactionNestLevel();
    num_seq_scans++;