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handle subqueries in the AST

This commit is contained in:
Jan Steemann 2014-08-05 17:07:23 +02:00
parent 1bb42c31e8
commit af288d9fe0
1 changed files with 10 additions and 3 deletions
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13
arangod/Aql/ExecutionPlan.cpp
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@ -241,6 +241,8 @@ ExecutionNode* ExecutionPlan::fromNodeFilter (Ast const* ast,
////////////////////////////////////////////////////////////////////////////////
/// @brief create an execution plan element from an AST LET node
/// this also includes handling of subqueries (as subqueries can only occur
/// inside LET nodes)
////////////////////////////////////////////////////////////////////////////////
ExecutionNode* ExecutionPlan::fromNodeLet (Ast const* ast,
@ -257,9 +259,14 @@ ExecutionNode* ExecutionPlan::fromNodeLet (Ast const* ast,
ExecutionNode* en = nullptr;
if (expression->type == NODE_TYPE_SUBQUERY) {
std::cout << "FAILED HERE\n";
// TODO: node might be a subquery. this is currently NOT handled
THROW_ARANGO_EXCEPTION(TRI_ERROR_NOT_IMPLEMENTED);
// operand is a subquery...
auto subquery = fromNode(ast, expression);
if (subquery == nullptr) {
THROW_ARANGO_EXCEPTION(TRI_ERROR_OUT_OF_MEMORY);
}
en = addNode(new SubqueryNode(subquery, v));
}
else {
// operand is some misc expression, including references to other variables