void CombineQueries(AstNode node, Dictionary <string, object> fromOrLetIdentifiers)
{
AstNode next;
for (AstNode child = node.FirstChild; child != null; child = next)
{
// store reference to next child before transformation
next = child.NextSibling;
CombineQueries(child, fromOrLetIdentifiers);
}
QueryExpression query = node as QueryExpression;
if (query != null)
{
QueryFromClause fromClause = (QueryFromClause)query.Clauses.First();
QueryExpression innerQuery = fromClause.Expression as QueryExpression;
if (innerQuery != null)
{
if (TryRemoveTransparentIdentifier(query, fromClause, innerQuery, fromOrLetIdentifiers))
{
RemoveTransparentIdentifierReferences(query, fromOrLetIdentifiers);
}
else
{
QueryContinuationClause continuation = new QueryContinuationClause();
continuation.PrecedingQuery = innerQuery.Detach();
continuation.Identifier = fromClause.Identifier;
continuation.CopyAnnotationsFrom(fromClause);
fromClause.ReplaceWith(continuation);
}
}
else
{
Match m = castPattern.Match(fromClause.Expression);
if (m.Success)
{
fromClause.Type = m.Get <AstType>("targetType").Single().Detach();
fromClause.Expression = m.Get <Expression>("inExpr").Single().Detach();
}
}
}
}
void CombineQueries(AstNode node)
{
for (AstNode child = node.FirstChild; child != null; child = child.NextSibling)
{
CombineQueries(child);
}
QueryExpression query = node as QueryExpression;
if (query != null)
{
QueryFromClause fromClause = (QueryFromClause)query.Clauses.First();
QueryExpression innerQuery = fromClause.Expression as QueryExpression;
if (innerQuery != null)
{
if (TryRemoveTransparentIdentifier(query, fromClause, innerQuery))
{
RemoveTransparentIdentifierReferences(query);
}
else
{
QueryContinuationClause continuation = new QueryContinuationClause();
continuation.PrecedingQuery = innerQuery.Detach();
continuation.Identifier = fromClause.Identifier;
fromClause.ReplaceWith(continuation);
}
}
else
{
Match m = castPattern.Match(fromClause.Expression);
if (m.Success)
{
fromClause.Type = m.Get <AstType>("targetType").Single().Detach();
fromClause.Expression = m.Get <Expression>("inExpr").Single().Detach();
}
}
}
}