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

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.

1 files changed, 23 insertions, 9 deletions

diff --git a/src/include/commands/variable.h b/src/include/commands/variable.h
index f4f12c97127..bdca5c88a92 100644
--- a/src/include/commands/variable.h
+++ b/src/include/commands/variable.h
@@ -1,18 +1,32 @@
 /*
- * Headers for handling of 'SET var TO', 'SHOW var' and 'RESET var'
- * statements
+ * variable.h
+ *		Routines for handling specialized SET variables.
  *
- * $Id: variable.h,v 1.17 2001/11/05 17:46:33 momjian Exp $
+ * $Id: variable.h,v 1.18 2002/05/17 01:19:19 tgl Exp $
  *
  */
 #ifndef VARIABLE_H
 #define VARIABLE_H
 
-extern void SetPGVariable(const char *name, List *args);
-extern void GetPGVariable(const char *name);
-extern void ResetPGVariable(const char *name);
-
-extern void set_default_datestyle(void);
-extern void set_default_client_encoding(void);
+extern const char *assign_datestyle(const char *value,
+									bool doit, bool interactive);
+extern const char *show_datestyle(void);
+extern const char *assign_timezone(const char *value,
+								   bool doit, bool interactive);
+extern const char *show_timezone(void);
+extern const char *assign_XactIsoLevel(const char *value,
+									   bool doit, bool interactive);
+extern const char *show_XactIsoLevel(void);
+extern bool assign_random_seed(double value,
+							   bool doit, bool interactive);
+extern const char *show_random_seed(void);
+extern const char *assign_client_encoding(const char *value,
+										  bool doit, bool interactive);
+extern const char *assign_server_encoding(const char *value,
+										  bool doit, bool interactive);
+extern const char *show_server_encoding(void);
+extern const char *assign_session_authorization(const char *value,
+												bool doit, bool interactive);
+extern const char *show_session_authorization(void);
 
 #endif   /* VARIABLE_H */