From d80735e256b52e1ec19c95bd3560969a72cf53bc Mon Sep 17 00:00:00 2001
From: Victor Barua <victor.barua@gmail.com>
Date: Sat, 20 Dec 2025 13:15:21 -0800
Subject: [PATCH] refactor: delete unused code

---
 .../substrait/isthmus/SubstraitToCalcite.java | 31 -------------------
 1 file changed, 31 deletions(-)

diff --git a/isthmus/src/main/java/io/substrait/isthmus/SubstraitToCalcite.java b/isthmus/src/main/java/io/substrait/isthmus/SubstraitToCalcite.java
index 772a3e192..a0c5132e4 100644
--- a/isthmus/src/main/java/io/substrait/isthmus/SubstraitToCalcite.java
+++ b/isthmus/src/main/java/io/substrait/isthmus/SubstraitToCalcite.java
@@ -3,16 +3,10 @@
 import io.substrait.extension.SimpleExtension;
 import io.substrait.isthmus.SubstraitRelNodeConverter.Context;
 import io.substrait.plan.Plan;
-import io.substrait.relation.NamedScan;
 import io.substrait.relation.Rel;
-import io.substrait.relation.RelCopyOnWriteVisitor;
-import io.substrait.type.NamedStruct;
 import io.substrait.util.EmptyVisitationContext;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
-import java.util.Optional;
 import org.apache.calcite.jdbc.CalciteSchema;
 import org.apache.calcite.prepare.Prepare;
 import org.apache.calcite.rel.RelNode;
@@ -229,29 +223,4 @@ private Pair<Integer, RelDataType> renameFields(
         return Pair.of(currentIndex, type);
     }
   }
-
-  private static class NamedStructGatherer extends RelCopyOnWriteVisitor<RuntimeException> {
-    Map<List<String>, NamedStruct> tableMap;
-
-    private NamedStructGatherer() {
-      super();
-      this.tableMap = new HashMap<>();
-    }
-
-    public static Map<List<String>, NamedStruct> gatherTables(Rel rel) {
-      NamedStructGatherer visitor = new NamedStructGatherer();
-      rel.accept(visitor, EmptyVisitationContext.INSTANCE);
-      return visitor.tableMap;
-    }
-
-    @Override
-    public Optional<Rel> visit(NamedScan namedScan, EmptyVisitationContext context) {
-      Optional<Rel> result = super.visit(namedScan, context);
-
-      List<String> tableName = namedScan.getNames();
-      tableMap.put(tableName, namedScan.getInitialSchema());
-
-      return result;
-    }
-  }
 }