Summary: Union query combinator implementation consists of: * adjustments to the AST and `cypher_main_visitor` * enabling `QueryStripper` to parse multiple `return` statements (not stopping after first) * symbol generation for union results * union logical operator * query plan generator adjustments Reviewers: teon.banek, mislav.bradac Reviewed By: teon.banek Subscribers: pullbot, buda Differential Revision: https://phabricator.memgraph.io/D1038
Technical Documentation
About Memgraph
Memgraph is an ACID compliant high performance transactional in-memory graph database management system featuring highly concurrent data structures, multi-version concurrency control and asynchronous IO.