Add columnDataType as base function

Author: ssh24

lib/sql.js

@@ -164,7 +164,25 @@ SQLConnector.prototype.addPropertyToActual = function(model, propName) {
 };
 
 SQLConnector.prototype.columnDataType = function(model, property) {
-  throw new Error(g.f('{{columnDataType()}} must be implemented by the connector'));
+  var columnMetadata = this.columnMetadata(model, property);
+  var colType = columnMetadata && columnMetadata.dataType;
+  if (colType) {
+    colType = colType.toUpperCase();
+  }
+  var prop = this.getModelDefinition(model).properties[property];
+  if (!prop) {
+    return null;
+  }
+  var colLength = columnMetadata && columnMetadata.dataLength ||
+    prop.length || prop.limit;
+  if (colType && colLength) {
+    return colType + '(' + colLength + ')';
+  }
+  return this.buildColumnType(prop);
+};
+
+SQLConnector.prototype.buildColumnType = function(property) {
+  throw new Error(g.f('{{buildColumnType()}} must be implemented by the connector'));
 };
 
 SQLConnector.prototype.propertyHasNotBeenDeleted = function(model, propName) {