Fixed MSSQl boolean support

Author: iteufel

Diff for: lib/dialects/mssql/index.js

@@ -7,6 +7,35 @@ var templateChecks = require('../../utils/templateChecks');
 
 var Dialect = module.exports = function(builder) {
 	builder.options.valuesPrefix = '@';
+	
+	builder._pushValue = function(value) {
+		if (_.isUndefined(value) || _.isNull(value)) {
+			return 'null';
+		} else if (_.isBoolean(value)) {
+			return String(Number(value));
+		} else if (_.isNumber(value)) {
+			return String(value);
+		} else if (_.isString(value) || _.isDate(value)) {
+			if (this.options.separatedValues) {
+				var placeholder = this._getPlaceholder();
+
+				if (this.options.namedValues) {
+					this._values[placeholder] = value;
+				} else {
+					this._values.push(value);
+				}
+
+				return this._wrapPlaceholder(placeholder);
+			} else {
+				if (_.isDate(value)) value = value.toISOString();
+
+				return '\'' + value + '\'';
+			}
+		} else {
+			throw new Error('Wrong value type "' + (typeof value) + '"');
+		}
+	};
+	
 	BaseDialect.call(this, builder);
 
 	this.blocks.set('limit', function(params) {