internal override SqlNode VisitIncludeScope(SqlIncludeScope scope) {
this.alreadyIncluded = new HashSet<MetaType>();
try {
return this.Visit(scope.Child); // Strip the include scope so SqlBinder will be idempotent.
}
finally {
this.alreadyIncluded = null;
}
}
internal virtual SqlNode VisitIncludeScope(SqlIncludeScope node) {
node.Child = this.Visit(node.Child);
return node;
}
/// <summary>
/// Convert inner expression from C# expression to basic SQL Query.
/// </summary>
/// <param name="node">The expression to convert.</param>
/// <returns>The converted SQL query.</returns>
internal SqlNode ConvertOuter(Expression node)
{
_dominatingExpression = node;
_outerNode = true;
SqlNode retNode;
retNode = typeof(ITable).IsAssignableFrom(node.Type) ? this.VisitSequence(node) : this.VisitInner(node);
if(retNode.NodeType == SqlNodeType.MethodCall)
{
// if a tree consists of a single method call expression only, that method
// must be either a mapped stored procedure or a mapped function
throw Error.InvalidMethodExecution(((SqlMethodCall)retNode).Method.Name);
}
// if after conversion the node is an expression, we must
// wrap it in a select
SqlExpression sqlExpression = retNode as SqlExpression;
if(sqlExpression != null)
{
retNode = new SqlSelect(sqlExpression, null, _dominatingExpression);
}
retNode = new SqlIncludeScope(retNode, _dominatingExpression);
return retNode;
}
internal override SqlNode VisitIncludeScope(SqlIncludeScope scope)
{
return new SqlIncludeScope(this.Visit(scope.Child), scope.SourceExpression);
}