Patch of 2004-03-30 corrected date_part(timestamp) for extracting

tglsfdc · tglsfdc · commit c584103f5604 · 2004-11-20T22:12:44.000Z
the year from a BC date, but failed to make the same fix in
date_part(timestamptz).
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.114 2004/11/01 22:00:30 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.115 2004/11/20 22:12:44 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -3534,7 +3534,11 @@ timestamptz_part(PG_FUNCTION_ARGS)
 				break;
 
 			case DTK_YEAR:
-				result = tm->tm_year;
+				if (tm->tm_year > 0)
+					result = tm->tm_year;
+				else
+					/* there is no year 0, just 1 BC and 1 AD */
+					result = tm->tm_year - 1;
 				break;
 
 			case DTK_DECADE:

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.114 2004/11/01 22:00:30 tgl Exp $`
	`11`	`+ * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.115 2004/11/20 22:12:44 tgl Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -3534,7 +3534,11 @@ timestamptz_part(PG_FUNCTION_ARGS)`
`3534`	`3534`	`break;`
`3535`	`3535`
`3536`	`3536`	`case DTK_YEAR:`
`3537`		`- result = tm->tm_year;`
	`3537`	`+ if (tm->tm_year > 0)`
	`3538`	`+ result = tm->tm_year;`
	`3539`	`+ else`
	`3540`	`+ /* there is no year 0, just 1 BC and 1 AD */`
	`3541`	`+ result = tm->tm_year - 1;`
`3538`	`3542`	`break;`
`3539`	`3543`
`3540`	`3544`	`case DTK_DECADE:`