Module com.darkcollective.relix.optimizer
Package com.darkcollective.relix.optimizer.internal

Class ViewInliner

java.lang.Object
com.darkcollective.relix.optimizer.internal.ViewInliner
public final class ViewInliner extends Object
Expands references to named views into the views' bodies, so that the rule passes can optimise across former view boundaries (e.g. push a selection from the outer query down into what used to be a view).

A reference RelationNode("V") that resolves to a QueryRelationSymbol is replaced by ρ V (inline(V.body)) — the view's (recursively inlined) body wrapped in a relation-only RenameNode. The wrapper re-establishes V as a relation alias so that qualified attribute references like V.col still resolve to the correct side of a join after inlining (without it, the view name would no longer name any subtree). A relation-only rename leaves column names unchanged, so the expansion is otherwise transparent.

Base relations (inline literals, sources, databases) are left as RelationNode leaves. Cycles are impossible because semantic analysis rejects cyclic view definitions.