Add the Brazilian time zone abbreviations BRT, BRST, FNT, FNST.

ACT and ACST were already present.  AMT and AMST conflict with the
existing entries for Armenia; no change there for the moment.

doc/src/sgml/datetime.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.33 2003/08/25 23:30:25 tgl Exp $
 -->
 
  <appendix id="datetime-appendix">
@@ -536,18 +536,10 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tg
 	<entry>+07:00</entry>
 	<entry>Christmas (Island) Time</entry>
        </row>
-<!--
-       Conflicts with China Coastal Time
-       <row>
-	<entry>CCT</entry>
-	<entry>+06:30</entry>
-	<entry>Cocos Island Time</entry>
-       </row>
--->
        <row>
 	<entry>MMT</entry>
 	<entry>+06:30</entry>
-	<entry>Myannar Time</entry>
+	<entry>Myanmar Time</entry>
        </row>
        <row>
 	<entry>ALMT</entry>
@@ -759,6 +751,21 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tg
 	<entry>-01:00</entry>
 	<entry>West Africa Time</entry>
        </row>
+       <row>
+	<entry>FNST</entry>
+	<entry>-01:00</entry>
+	<entry>Fernando de Noronha Summer Time</entry>
+       </row>
+       <row>
+	<entry>FNT</entry>
+	<entry>-02:00</entry>
+	<entry>Fernando de Noronha Time</entry>
+       </row>
+       <row>
+	<entry>BRST</entry>
+	<entry>-02:00</entry>
+	<entry>Brasilia Summer Time</entry>
+       </row>
        <row>
 	<entry>NDT</entry>
 	<entry>-02:30</entry>
@@ -774,6 +781,11 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tg
 	<entry>-03:00</entry>
 	<entry>(unknown)</entry>
        </row>
+       <row>
+	<entry>BRT</entry>
+	<entry>-03:00</entry>
+	<entry>Brasilia Time</entry>
+       </row>
        <row>
 	<entry>NFT</entry>
 	<entry>-03:30</entry>
@@ -794,11 +806,6 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tg
 	<entry>-04:00</entry>
 	<entry>Atlantic/Porto Acre Summer Time</entry>
        </row>
-       <row>
-	<entry>ACT</entry>
-	<entry>-05:00</entry>
-	<entry>Atlantic/Porto Acre Standard Time</entry>
-       </row>
        <row>
 	<entry>EDT</entry>
 	<entry>-04:00</entry>
@@ -811,6 +818,11 @@ $Header: /cvsroot/pgsql/doc/src/sgml/datetime.sgml,v 2.32 2003/07/29 00:03:17 tg
       <entry>GMT +4 hours</entry>
       </row>
        -->
+       <row>
+	<entry>ACT</entry>
+	<entry>-05:00</entry>
+	<entry>Atlantic/Porto Acre Standard Time</entry>
+       </row>
        <row>
 	<entry>CDT</entry>
 	<entry>-05:00</entry>

src/backend/utils/adt/datetime.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.114 2003/08/25 22:47:34 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/adt/datetime.c,v 1.115 2003/08/25 23:30:27 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -82,7 +82,7 @@ char	   *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday",
  * which are 30 or 45 minutes away from an even hour, most are on an hour
  * boundary, and none on other boundaries.
  *
- * Let's include all strings from my current zinc time zone database.
+ * Let's include all strings from my current zic time zone database.
  * Not all of them are unique, or even very understandable, so we will
  * leave some commented out for now.
  */
@@ -91,8 +91,8 @@ static datetkn datetktbl[] = {
 	{EARLY, RESERV, DTK_EARLY}, /* "-infinity" reserved for "early time" */
 	{"abstime", IGNORE_DTF, 0}, /* for pre-v6.1 "Invalid Abstime" */
 	{"acsst", DTZ, POS(42)},	/* Cent. Australia */
-	{"acst", DTZ, NEG(16)},		/* Atlantic/Porto Acre */
-	{"act", TZ, NEG(20)},		/* Atlantic/Porto Acre */
+	{"acst", DTZ, NEG(16)},		/* Atlantic/Porto Acre Summer Time */
+	{"act", TZ, NEG(20)},		/* Atlantic/Porto Acre Time */
 	{DA_D, ADBC, AD},			/* "ad" for years >= 0 */
 	{"adt", DTZ, NEG(12)},		/* Atlantic Daylight Time */
 	{"aesst", DTZ, POS(44)},	/* E. Australia */
@@ -107,9 +107,12 @@ static datetkn datetktbl[] = {
 	{"am", AMPM, AM},
 	{"amst", DTZ, POS(20)},		/* Armenia Summer Time (Yerevan) */
 #if 0
-	{"amst", DTZ, NEG(12)},		/* Porto Velho */
+	{"amst", DTZ, NEG(12)},		/* Amazon Summer Time (Porto Velho) */
 #endif
 	{"amt", TZ, POS(16)},		/* Armenia Time (Yerevan) */
+#if 0
+	{"amt", TZ, NEG(16)},		/* Amazon Time (Porto Velho) */
+#endif
 	{"anast", DTZ, POS(52)},	/* Anadyr Summer Time (Russia) */
 	{"anat", TZ, POS(48)},		/* Anadyr Time (Russia) */
 	{"apr", MONTH, 4},
@@ -147,10 +150,8 @@ static datetkn datetktbl[] = {
 #endif
 	{"bot", TZ, NEG(16)},		/* Bolivia Time */
 	{"bra", TZ, NEG(12)},		/* Brazil Time */
-#if 0
-	brst
-	brt
-#endif
+	{"brst", DTZ, NEG(8)},		/* Brasilia Summer Time */
+	{"brt", TZ, NEG(12)},		/* Brasilia Time */
 	{"bst", DTZ, POS(4)},		/* British Summer Time */
 #if 0
 	{"bst", TZ, NEG(12)},		/* Brazil Standard Time */
@@ -226,10 +227,8 @@ static datetkn datetktbl[] = {
 	{"fjt", TZ, NEG(48)},		/* Fiji Time */
 	{"fkst", DTZ, NEG(12)},		/* Falkland Islands Summer Time */
 	{"fkt", TZ, NEG(8)},		/* Falkland Islands Time */
-#if 0
-	fnst
-	fnt
-#endif
+	{"fnst", DTZ, NEG(4)},		/* Fernando de Noronha Summer Time */
+	{"fnt", TZ, NEG(8)},		/* Fernando de Noronha Time */
 	{"fri", DOW, 5},
 	{"friday", DOW, 5},
 	{"fst", TZ, POS(4)},		/* French Summer Time */
@@ -324,7 +323,7 @@ static datetkn datetktbl[] = {
 	{"mez", TZ, POS(4)},		/* Middle Europe Zone */
 	{"mht", TZ, POS(48)},		/* Kwajalein */
 	{"mm", UNITS, DTK_MINUTE},	/* "minute" for ISO input */
-	{"mmt", TZ, POS(26)},		/* Myannar Time */
+	{"mmt", TZ, POS(26)},		/* Myanmar Time */
 	{"mon", DOW, 1},
 	{"monday", DOW, 1},
 #if 0