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Make Cypher queries more specific #4

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@szarnyasg szarnyasg commented Oct 18, 2018

I reviewed the Interactive Cypher implementations and ended up changing complex Q2 by moving node labels ":Comment or :Post" from the WHERE clause to the MATCH clause as a single :Message label. This might allow the query engine to generate better quality plans.

I introduced similar, but less significant changes in the implementations repository with ldbc/ldbc_snb_interactive_v1_impls@6987a8f. These can also be ported to this PR.

Move node label from the WHERE clause into the MATCH clause
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