gudusoft.gsqlparser.ir.semantic.diff

Class CanonicalLineageModel

Object

gudusoft.gsqlparser.ir.semantic.diff.CanonicalLineageModel

public final class CanonicalLineageModel
extends Object

Common comparison form for both Semantic IR and dlineage. See the slice-7 plan for the why.

• getEdges() — the canonical edge set. SELECT edges have a non-null outputName; FILTER/JOIN edges have null.
• getOutputNames() — every outer output column the side produced (lower-cased). May contain names that have zero SELECT edges (aggregate-only outputs such as COUNT(*)).
• getAggregateByOutput() — per-output aggregate flag. The map covers exactly the names in getOutputNames().

All names (output, base table, base column) in this model are lower-cased. Original casing is preserved by the JSON exporter for triage but never participates in comparison.

Constructor Summary

Constructors

Constructor and Description
CanonicalLineageModel(Set<CanonicalLineageEdge> edges, Set<String> outputNames, Map<String,Boolean> aggregateByOutput)

Method Summary

Modifier and Type	Method and Description
static CanonicalLineageModel	empty() Empty model used by ProjectorResult when projection is unsupported.
Map<String,Boolean>	getAggregateByOutput()
Set<CanonicalLineageEdge>	getEdges()
Set<String>	getOutputNames()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CanonicalLineageModel

public CanonicalLineageModel(Set<CanonicalLineageEdge> edges,
                             Set<String> outputNames,
                             Map<String,Boolean> aggregateByOutput)

Method Detail

getEdges

public Set<CanonicalLineageEdge> getEdges()

getOutputNames

public Set<String> getOutputNames()

getAggregateByOutput

public Map<String,Boolean> getAggregateByOutput()

empty

public static CanonicalLineageModel empty()

Empty model used by ProjectorResult when projection is unsupported.