Just noticed that libpq thinks the maximum command tag length is 40,

whereas in the backend it's been 64 for some time.  Hasn't mattered
because no actual tags exceed 40 bytes, but for consistency they should
be alike.

src/interfaces/libpq/libpq-int.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.125 2007/07/23 17:52:06 mha Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.126 2007/07/23 18:59:50 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -76,7 +76,7 @@ typedef struct {
 /*
  * POSTGRES backend dependent Constants.
  */
-#define CMDSTATUS_LEN 40
+#define CMDSTATUS_LEN 64		/* should match COMPLETION_TAG_BUFSIZE */
 
 /*
  * PGresult and the subsidiary types PGresAttDesc, PGresAttValue