Marin Tomic 285e02d5ec Remove root tracking from AST storage ...

Summary: Up till now, `AstStorage` also took care of tracking the root of the `Query` and loading of cloning of `Query` nodes would change that root. This felt out of place because sometimes `AstStorage` is used only for storing expressions, and we don't even have an entire query in the storage. This diff removes that feature from `AstStorage`. Now its only functionality is owning AST nodes and assigning unique IDs to them.

Reviewers: teon.banek, llugovic

Reviewed By: teon.banek

Subscribers: mferencevic, pullbot

Differential Revision: https://phabricator.memgraph.io/D1646

2018-10-16 10:22:21 +02:00

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