protected override ISqlNode OnChildNode(ISqlNode node)
{
if (node is SqlQueryExpressionNode)
{
QueryExpression = (SqlQueryExpressionNode)node;
}
return(base.OnChildNode(node));
}
private static SqlExpression VisitQueryExpression(SqlQueryExpressionNode node)
{
var selectColumns = GetSelectColumns(node);
var exp = new SqlQueryExpression(selectColumns);
if (node.FromClause != null)
{
SetFromClause(exp.FromClause, node.FromClause);
}
if (node.WhereExpression != null)
{
exp.WhereExpression = Build(node.WhereExpression);
}
if (node.GroupBy != null)
{
var groupBy = new List <SqlExpression>();
if (node.GroupBy.GroupExpressions != null)
{
groupBy.AddRange(node.GroupBy.GroupExpressions.Select(Build));
}
exp.GroupBy = groupBy.ToList();
var having = node.GroupBy.HavingExpression;
if (having != null)
{
exp.HavingExpression = Build(having);
}
}
if (node.Composite != null)
{
var compositeExp = Build(node.Composite.QueryExpression);
exp.NextComposite = compositeExp as SqlQueryExpression;
exp.IsCompositeAll = node.Composite.IsAll;
exp.CompositeFunction = GetCompositeFunction(node.Composite.CompositeFunction);
}
return(exp);
}
protected override ISqlNode OnChildNode(ISqlNode node)
{
if (node.NodeName == "column_list_opt")
{
GetColumnList(node);
}
else if (node.NodeName == "or_replace_opt")
{
if (node.ChildNodes.Any())
{
ReplaceIfExists = true;
}
}
else if (node is ObjectNameNode)
{
ViewName = (ObjectNameNode)node;
}
else if (node is SqlQueryExpressionNode)
{
QueryExpression = (SqlQueryExpressionNode)node;
}
return(base.OnChildNode(node));
}
private static IEnumerable <SelectColumn> GetSelectColumns(SqlQueryExpressionNode node)
{
if (node.IsAll)
{
return(new[] { new SelectColumn(SqlExpression.Reference(new ObjectName("*"))) });
}
var items = new List <SelectColumn>();
foreach (var item in node.SelectItems)
{
SqlExpression exp;
if (item.Name != null)
{
exp = SqlExpression.Reference(ObjectName.Parse(item.Name.Name));
}
else if (item.Expression != null)
{
exp = Build(item.Expression);
}
else
{
throw new InvalidOperationException();
}
string alias = null;
if (item.Alias != null)
{
alias = item.Alias.Text;
}
items.Add(new SelectColumn(exp, alias));
}
return(items.ToArray());
}
public virtual void VisitQueryExpression(SqlQueryExpressionNode node)
{
}
