From aa2cb8b9ba1f979e35d3409bf924c7db07161be9 Mon Sep 17 00:00:00 2001
From: Andrew Hutchings <andrew@linuxjedi.co.uk>
Date: Wed, 18 Jan 2017 17:35:59 +0000
Subject: [PATCH] Also check for zero

Needed for unsigned int columns
---
 dbcon/ddlpackageproc/altertableprocessor.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dbcon/ddlpackageproc/altertableprocessor.cpp b/dbcon/ddlpackageproc/altertableprocessor.cpp
index d73c3a624..df2d77eb8 100644
--- a/dbcon/ddlpackageproc/altertableprocessor.cpp
+++ b/dbcon/ddlpackageproc/altertableprocessor.cpp
@@ -1838,6 +1838,12 @@ void AlterTableProcessor::tableComment(uint32_t sessionID, execplan::CalpontSyst
         {
             throw std::runtime_error(IDBErrorInfo::instance()->errorMsg(ERR_INVALID_START_VALUE));
         }
+        // Checks if zero and throws appropriate error (despite message name)
+        // negative checks are below
+        if (nextVal == 0)
+        {
+            throw std::runtime_error(IDBErrorInfo::instance()->errorMsg(ERR_NEGATIVE_STARTVALUE));
+        }
     }
     else
     {