From 4d83e61cd52218be36af8101d796ceb25bd121b1 Mon Sep 17 00:00:00 2001
From: Leijurv <leijurv@gmail.com>
Date: Thu, 24 Sep 2026 14:47:08 -0700
Subject: [PATCH] use timestamp column type in example configs

---
 flex-config/attributes.lua    | 22 ++++++++--------------
 flex-config/track-changes.lua | 10 +++-------
 2 files changed, 11 insertions(+), 21 deletions(-)

diff --git a/flex-config/attributes.lua b/flex-config/attributes.lua
index 3e61ad626..b17cf11b5 100644
--- a/flex-config/attributes.lua
+++ b/flex-config/attributes.lua
@@ -15,14 +15,12 @@ tables.nodes = osm2pgsql.define_node_table('nodes', {
     { column = 'geom', type = 'point', projection = srid },
     { column = 'version', type = 'int' },
     { column = 'changeset', type = 'int' },
-    -- There is no built-in type for timestamps in osm2pgsql. So we use the
-    -- PostgreSQL type "timestamp" and then have to convert our timestamps
-    -- to a valid text representation for that type.
+    -- The timestamp of the object is available as a number (seconds since
+    -- the epoch), osm2pgsql converts it for the "timestamp" column type.
     --
     -- Timestamps in OSM are always in UTC, depending on your use case you
     -- might want to store them using "timestamptz" instead.
-    -- See https://github.com/openstreetmap/osm2pgsql/issues/1785
-    { column = 'created', sql_type = 'timestamp' },
+    { column = 'created', type = 'timestamp' },
     { column = 'uid', type = 'int' },
     { column = 'user', type = 'text' },
 })
@@ -32,7 +30,7 @@ tables.ways = osm2pgsql.define_way_table('ways', {
     { column = 'geom', type = 'linestring', projection = srid },
     { column = 'version', type = 'int' },
     { column = 'changeset', type = 'int' },
-    { column = 'created', sql_type = 'timestamp' },
+    { column = 'created', type = 'timestamp' },
     { column = 'uid', type = 'int' },
     { column = 'user', type = 'text' },
     { column = 'nodes', type = 'text', sql_type = 'bigint[]' },
@@ -42,16 +40,12 @@ tables.relations = osm2pgsql.define_relation_table('relations', {
     { column = 'tags', type = 'jsonb' },
     { column = 'version', type = 'int' },
     { column = 'changeset', type = 'int' },
-    { column = 'created', sql_type = 'timestamp' },
+    { column = 'created', type = 'timestamp' },
     { column = 'uid', type = 'int' },
     { column = 'user', type = 'text' },
     { column = 'members', type = 'jsonb' },
 })
 
-local function format_date(ts)
-    return os.date('!%Y-%m-%dT%H:%M:%SZ', ts)
-end
-
 function osm2pgsql.process_node(object)
     if next(object.tags) == nil then
         return
@@ -62,7 +56,7 @@ function osm2pgsql.process_node(object)
         geom = object:as_point(),
         version = object.version,
         changeset = object.changeset,
-        created = format_date(object.timestamp),
+        created = object.timestamp,
         uid = object.uid,
         user = object.user
     })
@@ -74,7 +68,7 @@ function osm2pgsql.process_way(object)
         geom = object:as_linestring(),
         version = object.version,
         changeset = object.changeset,
-        created = format_date(object.timestamp),
+        created = object.timestamp,
         uid = object.uid,
         user = object.user,
         nodes = '{' .. table.concat(object.nodes, ',') .. '}'
@@ -86,7 +80,7 @@ function osm2pgsql.process_relation(object)
         tags = object.tags,
         version = object.version,
         changeset = object.changeset,
-        created = format_date(object.timestamp),
+        created = object.timestamp,
         uid = object.uid,
         user = object.user,
         members = object.members
diff --git a/flex-config/track-changes.lua b/flex-config/track-changes.lua
index cf9e3a094..0e0c489e5 100644
--- a/flex-config/track-changes.lua
+++ b/flex-config/track-changes.lua
@@ -19,7 +19,7 @@ local change_table = osm2pgsql.define_table{
         -- 'M' for modified,
         -- 'D' for deleted
         { column = 'action', type = 'text' },
-        { column = 'date', sql_type = 'timestamp' }
+        { column = 'date', type = 'timestamp' }
     },
     indexes = {
         { column = { 'osm_type', 'osm_id' }, method = 'btree' }
@@ -31,10 +31,6 @@ local change_table = osm2pgsql.define_table{
 -- being processed.
 local file_reading_in_progress = true
 
-local function format_date(ts)
-    return os.date('!%Y-%m-%dT%H:%M:%SZ', ts)
-end
-
 local function add_object_change(object)
     -- In this example only changes while updating the database are recorded.
     -- This happens in 'append' mode.
@@ -44,7 +40,7 @@ local function add_object_change(object)
             osm_id = object.id,
             version = object.version,
             action = (object.version == 1) and 'A' or 'M',
-            date = format_date(object.timestamp)
+            date = object.timestamp
         }
     end
 end
@@ -64,7 +60,7 @@ local function add_deleted_object(object)
         osm_id = object.id,
         version = object.version,
         action = 'D',
-        date = format_date(object.timestamp)
+        date = object.timestamp
     }
 end