From 1bf98f41716b664b669b4e8cd9a2a2642d9bb15d Mon Sep 17 00:00:00 2001
From: Denny Crane <denis.zhuravlov@gmail.com>
Date: Fri, 12 Aug 2022 18:50:49 -0300
Subject: [PATCH] test for Decimal aggregateFunction normalization #39420

---
 ...366_decimal_agg_state_conversion.reference |  3 +
 .../02366_decimal_agg_state_conversion.sql    | 62 +++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 tests/queries/0_stateless/02366_decimal_agg_state_conversion.reference
 create mode 100644 tests/queries/0_stateless/02366_decimal_agg_state_conversion.sql

diff --git a/tests/queries/0_stateless/02366_decimal_agg_state_conversion.reference b/tests/queries/0_stateless/02366_decimal_agg_state_conversion.reference
new file mode 100644
index 000000000000..88822fec8d00
--- /dev/null
+++ b/tests/queries/0_stateless/02366_decimal_agg_state_conversion.reference
@@ -0,0 +1,3 @@
+1.100001
+0.000001
+19	0.1
diff --git a/tests/queries/0_stateless/02366_decimal_agg_state_conversion.sql b/tests/queries/0_stateless/02366_decimal_agg_state_conversion.sql
new file mode 100644
index 000000000000..edcab325d919
--- /dev/null
+++ b/tests/queries/0_stateless/02366_decimal_agg_state_conversion.sql
@@ -0,0 +1,62 @@
+select sumMerge(y) from 
+(
+  select cast(x, 'AggregateFunction(sum, Decimal(50, 10))') y from 
+   (
+     select arrayReduce('sumState', [toDecimal256('0.000001', 10), toDecimal256('1.1', 10)]) x
+   )
+);
+
+select minMerge(y) from 
+(
+  select cast(x, 'AggregateFunction(min, Decimal(18, 10))') y from 
+   (
+     select arrayReduce('minState', [toDecimal64('0.000001', 10), toDecimal64('1.1', 10)]) x
+   )
+);
+
+
+drop table if exists consumer_02366;
+drop table if exists producer_02366;
+drop table if exists mv_02366;
+
+CREATE TABLE consumer_02366
+(
+    `id` UInt16,
+    `dec` AggregateFunction(argMin, Decimal(24, 10), UInt16)
+)
+ENGINE = AggregatingMergeTree
+PRIMARY KEY id
+ORDER BY id;
+
+CREATE TABLE producer_02366
+(
+    `id` UInt16,
+    `dec` String
+)
+ENGINE = MergeTree
+PRIMARY KEY id
+ORDER BY id;
+
+CREATE MATERIALIZED VIEW mv_02366 TO consumer_02366 AS
+SELECT
+    id,
+    argMinState(dec, id) AS dec
+FROM
+(
+    SELECT
+        id,
+        toDecimal128(dec, 10) AS dec
+    FROM producer_02366
+)
+GROUP BY id;
+
+INSERT INTO producer_02366 (*) VALUES (19, '.1');
+
+SELECT
+    id,
+    finalizeAggregation(dec)
+FROM consumer_02366;
+
+drop table consumer_02366;
+drop table producer_02366;
+drop table mv_02366;