From 0b49ca6e5eb61e14f5ef034fea036eb8ef77036d Mon Sep 17 00:00:00 2001
From: Fabian Stanke <825364+fmos@users.noreply.github.com>
Date: Thu, 2 Jun 2022 15:54:00 +0200
Subject: [PATCH] Fix the timezone format for Apache Arrow (pyarrow)

As noted by @ensky in #20155 the format returned by Postgres' DATE_TRUNC is not compatible (any more?). This is a quick fix that works for me.
---
 superset/db_engine_specs/postgres.py | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/superset/db_engine_specs/postgres.py b/superset/db_engine_specs/postgres.py
index c5ffc79ee7100..4b8a731d31fa4 100644
--- a/superset/db_engine_specs/postgres.py
+++ b/superset/db_engine_specs/postgres.py
@@ -84,14 +84,14 @@ class PostgresBaseEngineSpec(BaseEngineSpec):
 
     _time_grain_expressions = {
         None: "{col}",
-        "PT1S": "DATE_TRUNC('second', {col})",
-        "PT1M": "DATE_TRUNC('minute', {col})",
-        "PT1H": "DATE_TRUNC('hour', {col})",
-        "P1D": "DATE_TRUNC('day', {col})",
-        "P1W": "DATE_TRUNC('week', {col})",
-        "P1M": "DATE_TRUNC('month', {col})",
-        "P3M": "DATE_TRUNC('quarter', {col})",
-        "P1Y": "DATE_TRUNC('year', {col})",
+        "PT1S": "DATE_TRUNC('second', {col})||':00'",
+        "PT1M": "DATE_TRUNC('minute', {col})||':00'",
+        "PT1H": "DATE_TRUNC('hour', {col})||':00'",
+        "P1D": "DATE_TRUNC('day', {col})||':00'",
+        "P1W": "DATE_TRUNC('week', {col})||':00'",
+        "P1M": "DATE_TRUNC('month', {col})||':00'",
+        "P3M": "DATE_TRUNC('quarter', {col})||':00'",
+        "P1Y": "DATE_TRUNC('year', {col})||':00'",
     }
 
     custom_errors: Dict[Pattern[str], Tuple[str, SupersetErrorType, Dict[str, Any]]] = {