Add ability to setDefaultAutoDerivedColumnNames at global level.

core/src/main/java/org/sql2o/Query.java

@@ -76,6 +76,7 @@ private Query(Connection connection, String queryText, boolean returnGeneratedKe
         this.columnNames = columnNames;
         this.setColumnMappings(connection.getSql2o().getDefaultColumnMappings());
         this.caseSensitive = connection.getSql2o().isDefaultCaseSensitive();
+        this.autoDeriveColumnNames = connection.getSql2o().isDefaultAutoDeriveColumnNames();
 
         paramNameToIdxMap = new HashMap<>();
         parameters = new HashMap<>();

core/src/main/java/org/sql2o/Sql2o.java

@@ -30,6 +30,7 @@ public class Sql2o {
     final Quirks quirks;
     private Map<String, String> defaultColumnMappings;
     private boolean defaultCaseSensitive;
+    private boolean defaultAutoDeriveColumnNames;
 
     private ConnectionSource connectionSource;
 
@@ -151,6 +152,24 @@ public void setDefaultCaseSensitive(boolean defaultCaseSensitive) {
         this.defaultCaseSensitive = defaultCaseSensitive;
     }
 
+    /**
+     * Gets value indicating if this instance of Sql2o will automatically derive column names
+     * @see #setDefaultAutoDeriveColumnNames
+     * @return defaultAutoDeriveColumnNames
+     */
+    public boolean isDefaultAutoDeriveColumnNames() {
+        return defaultAutoDeriveColumnNames;
+    }
+
+    /**
+     * Sets a value indicating if this instance of Sql2o will auto derive column names by default. If your database uses
+     * underscores in column names and your properties do not, then this will handle the conversion.
+     * @param defaultAutoDeriveColumnNames
+     */
+    public void setDefaultAutoDeriveColumnNames(boolean defaultAutoDeriveColumnNames) {
+        this.defaultAutoDeriveColumnNames = defaultAutoDeriveColumnNames;
+    }
+
     /**
      * Creates a {@link Query}
      * @param query the sql query string

core/src/test/java/org/sql2o/Sql2oTest.java

@@ -1364,14 +1364,21 @@ public void setAnotherVeryExcitingValue(String anotherVeryExcitingValue) {
 
             assertNotNull(ex);
 
-            LocalPojo p = con.createQuery(selectSql)
+            LocalPojo localPojo1 = con.createQuery(selectSql)
                     .setAutoDeriveColumnNames(true)
                     .executeAndFetchFirst(LocalPojo.class);
 
-            assertNotNull(p);
-            assertEquals(1, p.getIdVal());
-            assertEquals("test1", p.getAnotherVeryExcitingValue());
+            assertNotNull(localPojo1);
+            assertEquals(1, localPojo1.getIdVal());
+            assertEquals("test1", localPojo1.getAnotherVeryExcitingValue());
 
+            sql2o.setDefaultAutoDeriveColumnNames(true);
+            LocalPojo localPojo2 = con.createQuery(selectSql)
+                .executeAndFetchFirst(LocalPojo.class);
+
+            assertNotNull(localPojo2);
+            assertEquals(1, localPojo2.getIdVal());
+            assertEquals("test1", localPojo2.getAnotherVeryExcitingValue());
         }
     }