From e3fc7662c1247e9e6c22b1847cfbddd190fca984 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@clickhouse.com>
Date: Thu, 9 Feb 2023 04:51:01 +0100
Subject: [PATCH] Add test

---
 .../0_stateless/02560_count_digits.reference  | 19 ++++++++++++++++
 .../0_stateless/02560_count_digits.sql        | 22 +++++++++++++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 tests/queries/0_stateless/02560_count_digits.reference
 create mode 100644 tests/queries/0_stateless/02560_count_digits.sql

diff --git a/tests/queries/0_stateless/02560_count_digits.reference b/tests/queries/0_stateless/02560_count_digits.reference
new file mode 100644
index 00000000000..836975f7db4
--- /dev/null
+++ b/tests/queries/0_stateless/02560_count_digits.reference
@@ -0,0 +1,19 @@
+1
+1
+1
+5
+5
+20
+19
+39
+78
+39
+77
+8
+9
+10
+11
+8
+9
+10
+11
diff --git a/tests/queries/0_stateless/02560_count_digits.sql b/tests/queries/0_stateless/02560_count_digits.sql
new file mode 100644
index 00000000000..19f5403bdf5
--- /dev/null
+++ b/tests/queries/0_stateless/02560_count_digits.sql
@@ -0,0 +1,22 @@
+SELECT countDigits(0);
+SELECT countDigits(1);
+SELECT countDigits(-1);
+SELECT countDigits(12345);
+SELECT countDigits(-12345);
+SELECT countDigits(0xFFFFFFFFFFFFFFFF);
+SELECT countDigits(CAST(0x8000000000000000 AS Int64));
+SELECT countDigits(CAST(-1 AS UInt128));
+SELECT countDigits(CAST(-1 AS UInt256));
+SELECT countDigits(CAST(CAST(-1 AS UInt128) DIV 2 + 1 AS Int128));
+SELECT countDigits(CAST(CAST(-1 AS UInt256) DIV 2 + 1 AS Int256));
+
+SELECT countDigits(-123.45678::Decimal32(5));
+SELECT countDigits(-123.456789::Decimal64(6));
+SELECT countDigits(-123.4567890::Decimal128(7));
+SELECT countDigits(-123.45678901::Decimal256(8));
+
+-- this behavior can be surprising, but actually reasonable:
+SELECT countDigits(-123.456::Decimal32(5));
+SELECT countDigits(-123.4567::Decimal64(6));
+SELECT countDigits(-123.45678::Decimal128(7));
+SELECT countDigits(-123.456789::Decimal256(8));