diff --git a/lib/Doctrine/DBAL/Schema/Comparator.php b/lib/Doctrine/DBAL/Schema/Comparator.php
index 20f5ea7b1a9..7e24b3e8c01 100644
--- a/lib/Doctrine/DBAL/Schema/Comparator.php
+++ b/lib/Doctrine/DBAL/Schema/Comparator.php
@@ -188,24 +188,24 @@ public function diffSequence(Sequence $sequence1, Sequence $sequence2)
     }
 
     /**
-     * Returns the difference between the tables $table1 and $table2.
+     * Returns the difference between the tables $fromTable and $toTable.
      *
      * If there are no differences this method returns the boolean false.
      *
      * @return TableDiff|false
      */
-    public function diffTable(Table $table1, Table $table2)
+    public function diffTable(Table $fromTable, Table $toTable)
     {
         $changes                     = 0;
-        $tableDifferences            = new TableDiff($table1->getName());
-        $tableDifferences->fromTable = $table1;
+        $tableDifferences            = new TableDiff($fromTable->getName());
+        $tableDifferences->fromTable = $fromTable;
 
-        $table1Columns = $table1->getColumns();
-        $table2Columns = $table2->getColumns();
+        $fromTableColumns = $fromTable->getColumns();
+        $toTableColumns   = $toTable->getColumns();
 
-        /* See if all the columns in table 1 exist in table 2 */
-        foreach ($table2Columns as $columnName => $column) {
-            if ($table1->hasColumn($columnName)) {
+        /* See if all the columns in "from" table exist in "to" table */
+        foreach ($toTableColumns as $columnName => $column) {
+            if ($fromTable->hasColumn($columnName)) {
                 continue;
             }
 
@@ -213,23 +213,23 @@ public function diffTable(Table $table1, Table $table2)
             $changes++;
         }
 
-        /* See if there are any removed columns in table 2 */
-        foreach ($table1Columns as $columnName => $column) {
-            // See if column is removed in table 2.
-            if (! $table2->hasColumn($columnName)) {
+        /* See if there are any removed columns in "to" table */
+        foreach ($fromTableColumns as $columnName => $column) {
+            // See if column is removed in "to" table.
+            if (! $toTable->hasColumn($columnName)) {
                 $tableDifferences->removedColumns[$columnName] = $column;
                 $changes++;
                 continue;
             }
 
-            // See if column has changed properties in table 2.
-            $changedProperties = $this->diffColumn($column, $table2->getColumn($columnName));
+            // See if column has changed properties in "to" table.
+            $changedProperties = $this->diffColumn($column, $toTable->getColumn($columnName));
 
             if (empty($changedProperties)) {
                 continue;
             }
 
-            $columnDiff = new ColumnDiff($column->getName(), $table2->getColumn($columnName), $changedProperties);
+            $columnDiff = new ColumnDiff($column->getName(), $toTable->getColumn($columnName), $changedProperties);
 
             $columnDiff->fromColumn                               = $column;
             $tableDifferences->changedColumns[$column->getName()] = $columnDiff;
@@ -238,12 +238,12 @@ public function diffTable(Table $table1, Table $table2)
 
         $this->detectColumnRenamings($tableDifferences);
 
-        $table1Indexes = $table1->getIndexes();
-        $table2Indexes = $table2->getIndexes();
+        $fromTableIndexes = $fromTable->getIndexes();
+        $toTableIndexes   = $toTable->getIndexes();
 
-        /* See if all the indexes in table 1 exist in table 2 */
-        foreach ($table2Indexes as $indexName => $index) {
-            if (($index->isPrimary() && $table1->hasPrimaryKey()) || $table1->hasIndex($indexName)) {
+        /* See if all the indexes in "from" table exist in "to" table */
+        foreach ($toTableIndexes as $indexName => $index) {
+            if (($index->isPrimary() && $fromTable->hasPrimaryKey()) || $fromTable->hasIndex($indexName)) {
                 continue;
             }
 
@@ -251,56 +251,56 @@ public function diffTable(Table $table1, Table $table2)
             $changes++;
         }
 
-        /* See if there are any removed indexes in table 2 */
-        foreach ($table1Indexes as $indexName => $index) {
-            // See if index is removed in table 2.
+        /* See if there are any removed indexes in "to" table */
+        foreach ($fromTableIndexes as $indexName => $index) {
+            // See if index is removed in "to" table.
             if (
-                ($index->isPrimary() && ! $table2->hasPrimaryKey()) ||
-                ! $index->isPrimary() && ! $table2->hasIndex($indexName)
+                ($index->isPrimary() && ! $toTable->hasPrimaryKey()) ||
+                ! $index->isPrimary() && ! $toTable->hasIndex($indexName)
             ) {
                 $tableDifferences->removedIndexes[$indexName] = $index;
                 $changes++;
                 continue;
             }
 
-            // See if index has changed in table 2.
-            $table2Index = $index->isPrimary() ? $table2->getPrimaryKey() : $table2->getIndex($indexName);
-            assert($table2Index instanceof Index);
+            // See if index has changed in "to" table.
+            $toTableIndex = $index->isPrimary() ? $toTable->getPrimaryKey() : $toTable->getIndex($indexName);
+            assert($toTableIndex instanceof Index);
 
-            if (! $this->diffIndex($index, $table2Index)) {
+            if (! $this->diffIndex($index, $toTableIndex)) {
                 continue;
             }
 
-            $tableDifferences->changedIndexes[$indexName] = $table2Index;
+            $tableDifferences->changedIndexes[$indexName] = $toTableIndex;
             $changes++;
         }
 
         $this->detectIndexRenamings($tableDifferences);
 
-        $fromFkeys = $table1->getForeignKeys();
-        $toFkeys   = $table2->getForeignKeys();
+        $fromForeignKeys = $fromTable->getForeignKeys();
+        $toForeignKeys   = $toTable->getForeignKeys();
 
-        foreach ($fromFkeys as $key1 => $constraint1) {
-            foreach ($toFkeys as $key2 => $constraint2) {
-                if ($this->diffForeignKey($constraint1, $constraint2) === false) {
-                    unset($fromFkeys[$key1], $toFkeys[$key2]);
+        foreach ($fromForeignKeys as $fromKey => $fromConstraint) {
+            foreach ($toForeignKeys as $toKey => $toConstraint) {
+                if ($this->diffForeignKey($fromConstraint, $toConstraint) === false) {
+                    unset($fromForeignKeys[$fromKey], $toForeignKeys[$toKey]);
                 } else {
-                    if (strtolower($constraint1->getName()) === strtolower($constraint2->getName())) {
-                        $tableDifferences->changedForeignKeys[] = $constraint2;
+                    if (strtolower($fromConstraint->getName()) === strtolower($toConstraint->getName())) {
+                        $tableDifferences->changedForeignKeys[] = $toConstraint;
                         $changes++;
-                        unset($fromFkeys[$key1], $toFkeys[$key2]);
+                        unset($fromForeignKeys[$fromKey], $toForeignKeys[$toKey]);
                     }
                 }
             }
         }
 
-        foreach ($fromFkeys as $constraint1) {
-            $tableDifferences->removedForeignKeys[] = $constraint1;
+        foreach ($fromForeignKeys as $fromConstraint) {
+            $tableDifferences->removedForeignKeys[] = $fromConstraint;
             $changes++;
         }
 
-        foreach ($toFkeys as $constraint2) {
-            $tableDifferences->addedForeignKeys[] = $constraint2;
+        foreach ($toForeignKeys as $toConstraint) {
+            $tableDifferences->addedForeignKeys[] = $toConstraint;
             $changes++;
         }