Add a timezone-specific variant of date_trunc().

date_trunc(field, timestamptz, zone_name) performs truncation using
the named time zone as reference, rather than working in the session
time zone as is the default behavior.  It's equivalent to

date_trunc(field, timestamptz at time zone zone_name) at time zone zone_name

but it's faster, easier to type, and arguably easier to understand.

Vik Fearing and Tom Lane

Discussion: https://postgr.es/m/[email protected]

2 files changed, 13 insertions, 8 deletions

diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h
index 7d78cbe026a..a307a2ba767 100644
--- a/src/include/catalog/catversion.h
+++ b/src/include/catalog/catversion.h
@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201811061
+#define CATALOG_VERSION_NO	201811141
 
 #endif
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 4026018ba9d..9264a2e9872 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -2280,6 +2280,10 @@
   descr => 'truncate timestamp with time zone to specified units',
   proname => 'date_trunc', provolatile => 's', prorettype => 'timestamptz',
   proargtypes => 'text timestamptz', prosrc => 'timestamptz_trunc' },
+{ oid => '1284',
+  descr => 'truncate timestamp with time zone to specified units in specified time zone',
+  proname => 'date_trunc', provolatile => 's', prorettype => 'timestamptz',
+  proargtypes => 'text timestamptz text', prosrc => 'timestamptz_trunc_zone' },
 { oid => '1218', descr => 'truncate interval to specified units',
   proname => 'date_trunc', prorettype => 'interval',
   proargtypes => 'text interval', prosrc => 'interval_trunc' },
@@ -5825,8 +5829,8 @@
   prorettype => 'timestamptz', proargtypes => '',
   prosrc => 'pg_backup_start_time' },
 { oid => '3436', descr => 'promote standby server',
-  proname => 'pg_promote', provolatile => 'v',
-  prorettype => 'bool', proargtypes => 'bool int4', proargnames => '{wait,wait_seconds}',
+  proname => 'pg_promote', provolatile => 'v', prorettype => 'bool',
+  proargtypes => 'bool int4', proargnames => '{wait,wait_seconds}',
   prosrc => 'pg_promote' },
 { oid => '2848', descr => 'switch to new wal file',
   proname => 'pg_switch_wal', provolatile => 'v', prorettype => 'pg_lsn',
@@ -10007,10 +10011,11 @@
   proallargtypes => '{text,int8,timestamptz}', proargmodes => '{o,o,o}',
   proargnames => '{name,size,modification}', prosrc => 'pg_ls_waldir' },
 { oid => '5031', descr => 'list of files in the archive_status directory',
-  proname => 'pg_ls_archive_statusdir', procost => '10', prorows => '20', proretset => 't',
-  provolatile => 'v', prorettype => 'record', proargtypes => '',
-  proallargtypes => '{text,int8,timestamptz}', proargmodes => '{o,o,o}',
-  proargnames => '{name,size,modification}', prosrc => 'pg_ls_archive_statusdir' },
+  proname => 'pg_ls_archive_statusdir', procost => '10', prorows => '20',
+  proretset => 't', provolatile => 'v', prorettype => 'record',
+  proargtypes => '', proallargtypes => '{text,int8,timestamptz}',
+  proargmodes => '{o,o,o}', proargnames => '{name,size,modification}',
+  prosrc => 'pg_ls_archive_statusdir' },
 { oid => '5029', descr => 'list files in the pgsql_tmp directory',
   proname => 'pg_ls_tmpdir', procost => '10', prorows => '20', proretset => 't',
   provolatile => 'v', prorettype => 'record', proargtypes => '',
@@ -10036,6 +10041,6 @@
   proallargtypes => '{regclass,regclass,regclass,bool,int4}',
   proargmodes => '{i,o,o,o,o}',
   proargnames => '{rootrelid,relid,parentrelid,isleaf,level}',
-  prosrc => 'pg_partition_tree' }
+  prosrc => 'pg_partition_tree' },
 
 ]