Function _add_star_projections

src/ast/ast_rewrite_call_subquery.c:592–630

}

static bool _add_star_projections
(
	cypher_astnode_t *node  // node to add the projections to
) {
	cypher_astnode_type_t type = cypher_astnode_type(node);

	cypher_astnode_t *query;
	if(type == CYPHER_AST_STATEMENT) {
		query = (cypher_astnode_t *)cypher_ast_statement_get_body(node);
	} else {
		// node is a call {} clause
		ASSERT(type == CYPHER_AST_CALL_SUBQUERY);

		query = cypher_ast_call_subquery_get_query(node);
	}

	bool rewritten = false;
	uint nclauses = cypher_ast_query_nclauses(query);
	for(uint i = 1; i < nclauses; i++) {
		cypher_astnode_t *clause = (cypher_astnode_t *)
			cypher_ast_query_get_clause(query, i);
		if(cypher_astnode_type(clause) == CYPHER_AST_CALL_SUBQUERY) {
			_add_star_projection(node, i);
			rewritten = true;

			// update `query` and `nclauses` to reflect the new query
			query = type == CYPHER_AST_STATEMENT ?
				(cypher_astnode_t *)cypher_ast_statement_get_body(node) :
				cypher_ast_call_subquery_get_query(node);
			i++;
			nclauses++;
			clause = (cypher_astnode_t *)cypher_ast_query_get_clause(query, i);

			_add_star_projections(clause);
		}
	}

	return rewritten;
}

// if the subquery will result in an eager and returning execution-plan
// rewrites it to contain the projections needed: