From 3e1861cc87814a00dc2c194675a196474f799c11 Mon Sep 17 00:00:00 2001
From: stronk7 <stronk7>
Date: Sat, 30 Sep 2006 15:48:23 +0000
Subject: [PATCH] Applying the field_exists() check to add and drop fields.

---
 lib/ddllib.php | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/ddllib.php b/lib/ddllib.php
index 417927d142..3c4d3a52a7 100644
--- a/lib/ddllib.php
+++ b/lib/ddllib.php
@@ -595,6 +595,12 @@ function add_field($table, $field, $continue=true, $feedback=true) {
         return false;
     }
 
+/// Check the field doesn't exist
+    if (field_exists($table, $field)) {
+        debugging('Field ' . $field->getName() . ' exists. Skipping its creation', DEBUG_DEVELOPER);
+        return true;
+    }
+
     if(!$sqlarr = $table->getAddFieldSQL($CFG->dbtype, $CFG->prefix, $field, false)) {
         return true; //Empty array = nothing to do = no error
     }
@@ -625,6 +631,12 @@ function drop_field($table, $field, $continue=true, $feedback=true) {
         return false;
     }
 
+/// Check the field exists
+    if (!field_exists($table, $field)) {
+        debugging('Field ' . $field->getName() . ' do not exist. Skipping its deletion', DEBUG_DEVELOPER);
+        return true;
+    }
+
     if(!$sqlarr = $table->getDropFieldSQL($CFG->dbtype, $CFG->prefix, $field, false)) {
         return true; //Empty array = nothing to do = no error
     }
-- 
2.39.5