Oops, wrong message with the other patch...this was the patch for the other

comment, so here is the comment for the other patch *grin*

> > You are right.  I checked the gramar and saw the ability to use the
> > parameter.  I looked at the manual pages, and saw no reference to it.  I
> > tried running it, and found vacuum does nothing when you give it a table
> > name.
> >
> > I checked a debug version of postgres, and the table name is passed to
> > vacuum() in the variable (char *vacrel).  The problem is that the vacuum
> > spans transactions, and the vacrel name gets changed to '<vacuum>',
> > which is the name of the portal that gets created in
> > vacuum.c::_vc_vacuum().  vacuum.c::_vc_init() does a
> > CommitTransactionCommand() which frees the memory allocated to vacrel.
> >
> > Should I change vacuum.c to copy the relation name to a local string
> > variable of vacuum(), or do you recommend we allocate the table name in
> > a different fashion?  You are the man who knows the most about this.
>
> static NameData VacRel;

Done.  Attached is the patch.  I have already applied it to the 2.0
tree. (Marc!)

I tested it and it works.  I also applied documentation patches to go
with it.

So now vacuum can be run for only one table if you wish.

Submitted by: Bruce Momjian <maillist@candle.pha.pa.us>

diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c
index 7987101a55a53f52d9ddcbfdfc833b536391d158..ad8e2cf8244385b2373819b6311d4a72f1bb5eb3 100644 (file)
--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.1.1.1.2.1 1996/10/04 20:37:09 scrappy Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.1.1.1.2.2 1996/10/04 20:38:49 scrappy Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -200,9 +200,11 @@ _vc_getrels(Portal p, NameData *VacRelP)
     VRelList vrl, cur;
     Datum d;
     char *rname;
+    char rkind;
     int16 smgrno;
     bool n;
     ScanKeyData  pgckey;
+    bool found = false;
 
     StartTransactionCommand();
 
@@ -225,6 +227,8 @@ _vc_getrels(Portal p, NameData *VacRelP)
 
     while (HeapTupleIsValid(pgctup = heap_getnext(pgcscan, 0, &buf))) {
 
+       found = true;
+       
        /*
         *  We have to be careful not to vacuum the archive (since it
         *  already contains vacuumed tuples), and not to vacuum
@@ -252,6 +256,18 @@ _vc_getrels(Portal p, NameData *VacRelP)
            continue;
        }
 
+       d = (Datum) heap_getattr(pgctup, buf, Anum_pg_class_relkind,
+                                pgcdesc, &n);
+
+       rkind = DatumGetChar(d);
+
+       /* skip system relations */
+       if (rkind != 'r') {
+           ReleaseBuffer(buf);
+           elog(NOTICE, "Vacuum: can not process index and certain system tables" );
+           continue;
+       }
+                                
        /* get a relation list entry for this guy */
        old = MemoryContextSwitchTo((MemoryContext)portalmem);
        if (vrl == (VRelList) NULL) {
@@ -272,7 +288,10 @@ _vc_getrels(Portal p, NameData *VacRelP)
        /* wei hates it if you forget to do this */
        ReleaseBuffer(buf);
     }
+    if (found == false)
+       elog(NOTICE, "Vacuum: table not found" );
 
+    
     heap_close(pgclass);
     heap_endscan(pgcscan);