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Support SET/SHOW/RESET client_encoding and server_encoding even when

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MULTIBYTE support is not compiled (you just can't set them to anything
but SQL_ASCII).  This should reduce interoperability problems between
MB-enabled clients and non-MB-enabled servers.
This commit is contained in:
Tom Lane
2000-10-25 19:44:44 +00:00
parent 995ccad699
commit 0a63b6d066
5 changed files with 117 additions and 113 deletions
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130
src/backend/commands/variable.c
View File

@ -9,16 +9,16 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.41 2000/09/22 15:34:31 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.42 2000/10/25 19:44:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <ctype.h>
#include <time.h>
#include "postgres.h"
#include "access/xact.h"
#include "catalog/pg_shadow.h"
#include "commands/variable.h"
@ -32,10 +32,13 @@
#ifdef MULTIBYTE
#include "mb/pg_wchar.h"
#else
/* Grand unified hard-coded badness */
#define pg_encoding_to_char(x) "SQL_ASCII"
#define pg_get_client_encoding() 0
#endif
static bool show_date(void);
static bool reset_date(void);
static bool parse_date(char *);
@ -53,6 +56,13 @@ static bool parse_random_seed(char *);
static bool show_random_seed(void);
static bool reset_random_seed(void);
static bool show_client_encoding(void);
static bool reset_client_encoding(void);
static bool parse_client_encoding(char *);
static bool show_server_encoding(void);
static bool reset_server_encoding(void);
static bool parse_server_encoding(char *);
/*
* get_token
@ -250,7 +260,7 @@ parse_date(char *value)
}
static bool
show_date()
show_date(void)
{
char buf[64];
@ -280,7 +290,7 @@ show_date()
}
static bool
reset_date()
reset_date(void)
{
DateStyle = DefaultDateStyle;
EuroDates = DefaultEuroDates;
@ -379,7 +389,7 @@ parse_timezone(char *value)
} /* parse_timezone() */
static bool
show_timezone()
show_timezone(void)
{
char *tz;
@ -401,7 +411,7 @@ show_timezone()
* - thomas 1998-01-26
*/
static bool
reset_timezone()
reset_timezone(void)
{
/* no time zone has been set in this session? */
if (defaultTZ == NULL)
@ -470,7 +480,7 @@ parse_DefaultXactIsoLevel(char *value)
}
static bool
show_DefaultXactIsoLevel()
show_DefaultXactIsoLevel(void)
{
if (DefaultXactIsoLevel == XACT_SERIALIZABLE)
@ -481,7 +491,7 @@ show_DefaultXactIsoLevel()
}
static bool
reset_DefaultXactIsoLevel()
reset_DefaultXactIsoLevel(void)
{
#if 0
TransactionState s = CurrentTransactionState;
@ -527,7 +537,7 @@ parse_XactIsoLevel(char *value)
}
static bool
show_XactIsoLevel()
show_XactIsoLevel(void)
{
if (XactIsoLevel == XACT_SERIALIZABLE)
@ -538,7 +548,7 @@ show_XactIsoLevel()
}
static bool
reset_XactIsoLevel()
reset_XactIsoLevel(void)
{
if (SerializableSnapshot != NULL)
@ -588,6 +598,96 @@ reset_random_seed(void)
}
/*
* MULTIBYTE-related functions
*
* If MULTIBYTE support was not compiled, we still allow these variables
* to exist, but you can't set them to anything but "SQL_ASCII". This
* minimizes interoperability problems between non-MB servers and MB-enabled
* clients.
*/
static bool
parse_client_encoding(char *value)
{
#ifdef MULTIBYTE
int encoding;
encoding = pg_valid_client_encoding(value);
if (encoding < 0)
{
if (value)
elog(ERROR, "Client encoding %s is not supported", value);
else
elog(ERROR, "No client encoding is specified");
}
else
{
if (pg_set_client_encoding(encoding))
{
elog(ERROR, "Conversion between %s and %s is not supported",
value, pg_encoding_to_char(GetDatabaseEncoding()));
}
}
#else
if (value &&
strcasecmp(value, pg_encoding_to_char(pg_get_client_encoding())) != 0)
elog(ERROR, "Client encoding %s is not supported", value);
#endif
return TRUE;
}
static bool
show_client_encoding(void)
{
elog(NOTICE, "Current client encoding is %s",
pg_encoding_to_char(pg_get_client_encoding()));
return TRUE;
}
static bool
reset_client_encoding(void)
{
#ifdef MULTIBYTE
int encoding;
char *env = getenv("PGCLIENTENCODING");
if (env)
{
encoding = pg_char_to_encoding(env);
if (encoding < 0)
encoding = GetDatabaseEncoding();
}
else
encoding = GetDatabaseEncoding();
pg_set_client_encoding(encoding);
#endif
return TRUE;
}
static bool
parse_server_encoding(char *value)
{
elog(NOTICE, "SET SERVER_ENCODING is not supported");
return TRUE;
}
static bool
show_server_encoding(void)
{
elog(NOTICE, "Current server encoding is %s",
pg_encoding_to_char(GetDatabaseEncoding()));
return TRUE;
}
static bool
reset_server_encoding(void)
{
elog(NOTICE, "RESET SERVER_ENCODING is not supported");
return TRUE;
}
void
SetPGVariable(const char *name, const char *value)
@ -606,12 +706,10 @@ SetPGVariable(const char *name, const char *value)
parse_DefaultXactIsoLevel(mvalue);
else if (strcasecmp(name, "XactIsoLevel")==0)
parse_XactIsoLevel(mvalue);
#ifdef MULTIBYTE
else if (strcasecmp(name, "client_encoding")==0)
parse_client_encoding(mvalue);
else if (strcasecmp(name, "server_encoding")==0)
parse_server_encoding(mvalue);
#endif
else if (strcasecmp(name, "random_seed")==0)
parse_random_seed(mvalue);
else
@ -633,12 +731,10 @@ GetPGVariable(const char *name)
show_DefaultXactIsoLevel();
else if (strcasecmp(name, "XactIsoLevel")==0)
show_XactIsoLevel();
#ifdef MULTIBYTE
else if (strcasecmp(name, "client_encoding")==0)
show_client_encoding();
else if (strcasecmp(name, "server_encoding")==0)
show_server_encoding();
#endif
else if (strcasecmp(name, "random_seed")==0)
show_random_seed();
else
@ -659,12 +755,10 @@ ResetPGVariable(const char *name)
reset_DefaultXactIsoLevel();
else if (strcasecmp(name, "XactIsoLevel")==0)
reset_XactIsoLevel();
#ifdef MULTIBYTE
else if (strcasecmp(name, "client_encoding")==0)
reset_client_encoding();
else if (strcasecmp(name, "server_encoding")==0)
reset_server_encoding();
#endif
else if (strcasecmp(name, "random_seed")==0)
reset_random_seed();
else