Do a more complete job of supporting time zone information.

Thomas G. Lockhart · Thomas G. Lockhart · commit 4ebc4e39d180 · 1997-11-10T15:37:15.000Z
Try to save pre-existing TZ environment variable if possible.
Includes code from Keith Parks.
diff --git a/src/backend/tcop/variable.c b/src/backend/tcop/variable.c
@@ -2,7 +2,7 @@
  * Routines for handling of 'SET var TO',
  *  'SHOW var' and 'RESET var' statements.
  *
- * $Id: variable.c,v 1.20 1997/11/10 15:24:56 thomas Exp $
+ * $Id: variable.c,v 1.21 1997/11/10 15:37:15 thomas Exp $
  *
  */
 
@@ -439,6 +439,11 @@ static char *defaultTZ = NULL;
 static char TZvalue[64];
 static char tzbuf[64];
 
+/* parse_timezone()
+ * Handle SET TIME ZONE...
+ * Try to save existing TZ environment variable for later use in RESET TIME ZONE.
+ * - thomas 1997-11-10
+ */
 bool
 parse_timezone(const char *value)
 {

Original file line number	Diff line number	Diff line change
`@@ -2,7 +2,7 @@`
`2`	`2`	`* Routines for handling of 'SET var TO',`
`3`	`3`	`* 'SHOW var' and 'RESET var' statements.`
`4`	`4`	`*`
`5`		`- * $Id: variable.c,v 1.20 1997/11/10 15:24:56 thomas Exp $`
	`5`	`+ * $Id: variable.c,v 1.21 1997/11/10 15:37:15 thomas Exp $`
`6`	`6`	`*`
`7`	`7`	`*/`
`8`	`8`
`@@ -439,6 +439,11 @@ static char *defaultTZ = NULL;`
`439`	`439`	`static char TZvalue[64];`
`440`	`440`	`static char tzbuf[64];`
`441`	`441`
	`442`	`+/* parse_timezone()`
	`443`	`+ * Handle SET TIME ZONE...`
	`444`	`+ * Try to save existing TZ environment variable for later use in RESET TIME ZONE.`
	`445`	`+ * - thomas 1997-11-10`
	`446`	`+ */`
`442`	`447`	`bool`
`443`	`448`	`parse_timezone(const char *value)`
`444`	`449`	`{`