| public Subtract ( HqlExpression lhs, HqlExpression rhs ) : HqlSubtract | ||
| lhs | HqlExpression | |
| rhs | HqlExpression | |
| return | HqlSubtract | |
public override HqlTreeNode BuildHql(MethodInfo method, Expression targetObject, ReadOnlyCollection<Expression> arguments, HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
HqlMethodCall locate;
if (arguments.Count == 1)
{
locate = treeBuilder.MethodCall("locate",
visitor.Visit(arguments[0]).AsExpression(),
visitor.Visit(targetObject).AsExpression()); //,
//treeBuilder.Constant(0));
}
else
{
var start = treeBuilder.Add(visitor.Visit(arguments[1]).AsExpression(), treeBuilder.Constant(1));
locate = treeBuilder.MethodCall("locate",
visitor.Visit(arguments[0]).AsExpression(),
visitor.Visit(targetObject).AsExpression(),
start);
}
return treeBuilder.Subtract(locate,treeBuilder.Constant(1));
}
public override HqlTreeNode BuildHql(MethodInfo method, Expression targetObject, ReadOnlyCollection<Expression> arguments, HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
var length = arguments.Count == 1
? treeBuilder.Subtract(treeBuilder.MethodCall("length", visitor.Visit(targetObject).AsExpression()), visitor.Visit(arguments[0]).AsExpression())
: visitor.Visit(arguments[1]).AsExpression();
return treeBuilder.MethodCall("substring", visitor.Visit(targetObject).AsExpression(),
treeBuilder.Add(visitor.Visit(arguments[0]).AsExpression(), treeBuilder.Constant(1)),
length);
}
