protected override Expression VisitUnion(SqlUnionExpression expression)
{
this.hashCode ^= expression.UnionAll ? 1234145998 : 0;
this.hashCode ^= expression.Alias?.GetHashCode() ?? 0;
return(base.VisitUnion(expression));
}
protected override Expression VisitUnion(SqlUnionExpression expression)
{
this.hashCode ^= expression.UnionAll ? 1234145998 : 0;
this.hashCode ^= expression.Alias?.GetHashCode() ?? 0;
return base.VisitUnion(expression);
}
protected override Expression VisitUnion(SqlUnionExpression expression)
{
SqlUnionExpression current;
if (!TryGetCurrent(expression, out current))
{
return expression;
}
if (!(this.result &= current.UnionAll == expression.UnionAll))
{
return expression;
}
if (!(this.result &= current.NodeType == expression.NodeType))
{
return expression;
}
if (!(this.result &= object.Equals(current.Alias, expression.Alias)))
{
return expression;
}
if (!(this.result &= current.Type == expression.Type))
{
return expression;
}
this.currentObject = current.Left;
this.Visit(expression.Left);
if (!this.result)
{
return expression;
}
this.currentObject = current.Right;
this.Visit(expression.Right);
if (!this.result)
{
return expression;
}
this.currentObject = current.Aliases;
this.VisitObjectList(expression.Aliases);
if (!this.result)
{
return expression;
}
this.currentObject = current;
return expression;
}
protected virtual Expression VisitUnion(SqlUnionExpression expression)
{
var left = this.Visit(expression.Left);
var right = this.Visit(expression.Right);
if (left != expression.Left || right != expression.Right)
{
return new SqlUnionExpression(expression.Type, expression.Alias, left, right, expression.UnionAll);
}
return expression;
}
protected override Expression VisitUnion(SqlUnionExpression union)
{
return union;
}
protected override Expression VisitUnion(SqlUnionExpression expression)
{
var savedSelectNext = this.selectNest;
this.selectNest = 0;
this.Write("(");
this.Visit(expression.Left);
if (expression.UnionAll)
{
this.Write(" UNION ALL ");
}
else
{
this.Write(" UNION ");
}
this.Visit(expression.Right);
this.Write(")");
this.Write(" AS ");
this.WriteQuotedIdentifier(expression.Alias);
this.selectNest = savedSelectNext;
return expression;
}
