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Invent an assign-hook mechanism for psql variables similar to the one

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existing for backend GUC variables, and use this to eliminate repeated
fetching/parsing of psql variables in psql's inner loops.  In a trivial
test with lots of 'select 1;' commands, psql's CPU time went down almost
10%, although of course the effect on total elapsed time was much less.
Per discussion about how to ensure the upcoming FETCH_COUNT patch doesn't
cost any performance when not being used.
This commit is contained in:
Tom Lane
2006-08-29 15:19:51 +00:00
parent b681bfdd59
commit 0434c46db0
12 changed files with 408 additions and 267 deletions
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4
src/bin/psql/copy.c
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.66 2006/06/14 16:49:02 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.67 2006/08/29 15:19:50 tgl Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
@ -704,7 +704,7 @@ handleCopyIn(PGconn *conn, FILE *copystream, bool isbinary)
/* Prompt if interactive input */
if (isatty(fileno(copystream)))
{
if (!QUIET())
if (!pset.quiet)
puts(_("Enter data to be copied followed by a newline.\n"
"End with a backslash and a period on a line by itself."));
prompt = get_prompt(PROMPT_COPY);