remove unused map

Author: idegtiarenko

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/LocalExecutionPlanner.java

@@ -118,9 +118,6 @@
 import org.elasticsearch.xpack.esql.session.Configuration;
 
 import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -502,8 +499,8 @@ private PhysicalOperation planGrok(GrokExec grok, LocalExecutionPlannerContext c
         Layout.Builder layoutBuilder = source.layout.builder();
         List<Attribute> extractedFields = grok.extractedFields();
         layoutBuilder.append(extractedFields);
-        Map<String, Integer> fieldToPos = new HashMap<>(extractedFields.size());
-        Map<String, ElementType> fieldToType = new HashMap<>(extractedFields.size());
+        Map<String, Integer> fieldToPos = Maps.newHashMapWithExpectedSize(extractedFields.size());
+        Map<String, ElementType> fieldToType = Maps.newHashMapWithExpectedSize(extractedFields.size());
         ElementType[] types = new ElementType[extractedFields.size()];
         List<Attribute> extractedFieldsFromPattern = grok.pattern().extractedFields();
         for (int i = 0; i < extractedFields.size(); i++) {
@@ -560,7 +557,8 @@ private PhysicalOperation planEnrich(EnrichExec enrich, LocalExecutionPlannerCon
     private PhysicalOperation planRerank(RerankExec rerank, LocalExecutionPlannerContext context) {
         PhysicalOperation source = plan(rerank.child(), context);
 
-        Map<ColumnInfoImpl, EvalOperator.ExpressionEvaluator.Factory> rerankFieldsEvaluatorSuppliers = new LinkedHashMap<>();
+        Map<ColumnInfoImpl, EvalOperator.ExpressionEvaluator.Factory> rerankFieldsEvaluatorSuppliers = Maps
+            .newLinkedHashMapWithExpectedSize(rerank.rerankFields().size());
 
         for (var rerankField : rerank.rerankFields()) {
             rerankFieldsEvaluatorSuppliers.put(
@@ -735,24 +733,13 @@ private PhysicalOperation planProject(ProjectExec project, LocalExecutionPlanner
         List<Integer> projectionList = new ArrayList<>(projections.size());
 
         Layout.Builder layout = new Layout.Builder();
-        Map<Integer, Layout.ChannelSet> inputChannelToOutputIds = Maps.newHashMapWithExpectedSize(projections.size());
         for (NamedExpression ne : projections) {
             NameId inputId = ne instanceof Alias a ? ((NamedExpression) a.child()).id() : ne.id();
             Layout.ChannelAndType input = source.layout.get(inputId);
             if (input == null) {
                 throw new IllegalStateException("can't find input for [" + ne + "]");
             }
-            Layout.ChannelSet channelSet = inputChannelToOutputIds.get(input.channel());
-            if (channelSet == null) {
-                channelSet = new Layout.ChannelSet(new HashSet<>(), input.type());
-                channelSet.nameIds().add(ne.id());
-                layout.append(channelSet);
-            } else {
-                channelSet.nameIds().add(ne.id());
-            }
-            if (channelSet.type() != input.type()) {
-                throw new IllegalArgumentException("type mismatch for aliases");
-            }
+            layout.append(ne);
             projectionList.add(input.channel());
         }