From eef02792b933a48634fcea2f3425d32e8a7e19d4 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Thu, 25 Nov 2021 07:44:32 +0100
Subject: [PATCH v5 4/6] Add test case for trailing junk after numeric literals

PostgreSQL currently accepts numeric literals with trailing
non-digits, such as 123abc where the abc is treated as the next token.
This may be a bit surprising.  This commit adds test cases for this;
subsequent commits intend to change this behavior.
---
 src/test/regress/expected/numerology.out | 55 ++++++++++++++++++++++++
 src/test/regress/sql/numerology.sql      | 14 ++++++
 2 files changed, 69 insertions(+)

diff --git a/src/test/regress/expected/numerology.out b/src/test/regress/expected/numerology.out
index 44d6c435de..32c6d80c03 100644
--- a/src/test/regress/expected/numerology.out
+++ b/src/test/regress/expected/numerology.out
@@ -3,6 +3,61 @@
 -- Test various combinations of numeric types and functions.
 --
 --
+-- Trailing junk in numeric literals
+--
+SELECT 123abc;
+ abc 
+-----
+ 123
+(1 row)
+
+SELECT 0x0o;
+ x0o 
+-----
+   0
+(1 row)
+
+SELECT 1_2_3;
+ _2_3 
+------
+    1
+(1 row)
+
+SELECT 0.a;
+ a 
+---
+ 0
+(1 row)
+
+SELECT 0.0a;
+  a  
+-----
+ 0.0
+(1 row)
+
+SELECT .0a;
+  a  
+-----
+ 0.0
+(1 row)
+
+SELECT 0.0e1a;
+ a 
+---
+ 0
+(1 row)
+
+SELECT 0.0e;
+  e  
+-----
+ 0.0
+(1 row)
+
+SELECT 0.0e+a;
+ERROR:  syntax error at or near "+"
+LINE 1: SELECT 0.0e+a;
+                   ^
+--
 -- Test implicit type conversions
 -- This fails for Postgres v6.1 (and earlier?)
 --  so let's try explicit conversions for now - tgl 97/05/07
diff --git a/src/test/regress/sql/numerology.sql b/src/test/regress/sql/numerology.sql
index fddb58f8fd..70447a95fa 100644
--- a/src/test/regress/sql/numerology.sql
+++ b/src/test/regress/sql/numerology.sql
@@ -3,6 +3,20 @@
 -- Test various combinations of numeric types and functions.
 --
 
+--
+-- Trailing junk in numeric literals
+--
+
+SELECT 123abc;
+SELECT 0x0o;
+SELECT 1_2_3;
+SELECT 0.a;
+SELECT 0.0a;
+SELECT .0a;
+SELECT 0.0e1a;
+SELECT 0.0e;
+SELECT 0.0e+a;
+
 --
 -- Test implicit type conversions
 -- This fails for Postgres v6.1 (and earlier?)
-- 
2.33.1