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Merge the last few variable.c configuration variables into the generic

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GUC support.  It's now possible to set datestyle, timezone, and
client_encoding from postgresql.conf and per-database or per-user
settings.  Also, implement rollback of SET commands that occur in a
transaction that later fails.  Create a SET LOCAL var = value syntax
that sets the variable only for the duration of the current transaction.
All per previous discussions in pghackers.
This commit is contained in:
Tom Lane
2002-05-17 01:19:19 +00:00
parent fa613fa1ea
commit f0811a74b3
42 changed files with 2641 additions and 1802 deletions
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45
src/backend/utils/adt/ruleutils.c
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@ -3,7 +3,7 @@
* back to source text
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.104 2002/05/12 23:43:03 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.105 2002/05/17 01:19:18 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -2576,27 +2576,33 @@ quote_identifier(const char *ident)
* and contains only lowercase letters, digits, and underscores, *and* is
* not any SQL keyword. Otherwise, supply quotes.
*/
int nquotes = 0;
bool safe;
const char *ptr;
char *result;
char *optr;
/*
* would like to use <ctype.h> macros here, but they might yield
* unwanted locale-specific results...
*/
safe = ((ident[0] >= 'a' && ident[0] <= 'z') || ident[0] == '_');
if (safe)
for (ptr = ident; *ptr; ptr++)
{
const char *ptr;
char ch = *ptr;
for (ptr = ident + 1; *ptr; ptr++)
if ((ch >= 'a' && ch <= 'z') ||
(ch >= '0' && ch <= '9') ||
(ch == '_'))
{
char ch = *ptr;
safe = ((ch >= 'a' && ch <= 'z') ||
(ch >= '0' && ch <= '9') ||
(ch == '_'));
if (!safe)
break;
/* okay */
}
else
{
safe = false;
if (ch == '"')
nquotes++;
}
}
@ -2618,8 +2624,21 @@ quote_identifier(const char *ident)
if (safe)
return ident; /* no change needed */
result = (char *) palloc(strlen(ident) + 2 + 1);
sprintf(result, "\"%s\"", ident);
result = (char *) palloc(strlen(ident) + nquotes + 2 + 1);
optr = result;
*optr++ = '"';
for (ptr = ident; *ptr; ptr++)
{
char ch = *ptr;
if (ch == '"')
*optr++ = '"';
*optr++ = ch;
}
*optr++ = '"';
*optr = '\0';
return result;
}