remove check and test for more than one mapper per field

src/main/java/org/elasticsearch/index/query/functionscore/DecayFunctionParser.java

@@ -35,7 +35,6 @@ import org.elasticsearch.index.fielddata.GeoPointValues;
 import org.elasticsearch.index.fielddata.IndexGeoPointFieldData;
 import org.elasticsearch.index.fielddata.IndexNumericFieldData;
 import org.elasticsearch.index.mapper.FieldMapper;
-import org.elasticsearch.index.mapper.FieldMappers;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.mapper.core.DateFieldMapper;
 import org.elasticsearch.index.mapper.core.NumberFieldMapper;
@@ -47,7 +46,6 @@ import org.elasticsearch.index.query.functionscore.gauss.GaussDecayFunctionParse
 import org.elasticsearch.search.internal.SearchContext;
 
 import java.io.IOException;
-import java.util.List;
 
 /**
  * This class provides the basic functionality needed for adding a decay
@@ -149,14 +147,7 @@ public abstract class DecayFunctionParser implements ScoreFunctionParser {
             throw new QueryParsingException(parseContext.index(), "Unknown field [" + fieldName + "]");
         }
 
-        FieldMappers mappers = smartMappers.fieldMappers();
+        FieldMapper<?> mapper = smartMappers.fieldMappers().mapper();
-        List<FieldMapper> allMappers = mappers.mappers();
-        if (allMappers.size() != 1) {
-            throw new QueryParsingException(parseContext.index(), "The field name [" + fieldName
-                    + "] is ambiguous! Please set the full name of the field");
-        }
-        FieldMapper<?> mapper = allMappers.get(0);
-
         // dates and time need special handling
         if (mapper instanceof DateFieldMapper) {
             return parseDateVariable(fieldName, parser, parseContext, (DateFieldMapper) mapper);

src/test/java/org/elasticsearch/test/integration/search/functionscore/DecayFunctionScoreTests.java

@@ -337,31 +337,6 @@ public class DecayFunctionScoreTests extends AbstractSharedClusterTest {
 
     }
 
-    @Test(expected = SearchPhaseExecutionException.class)
-    public void testParsingExceptionIfMultipleFieldsWithSameName() throws Exception {
-        createIndexMapped("test", "type", "test", "string", "num", "double");
-        ensureYellow();
-        int numDocs = 2;
-
-        // so, we added a mapping for "type", but now we index "type1".
-        // this will result in two fields "type.num" and "type1.num"
-        client().index(
-                indexRequest("test").type("type1").source(jsonBuilder().startObject().field("test", "value").field("num", 1).endObject()))
-                .actionGet();
-        refresh();
-        DecayFunctionBuilder gfb3 = new LinearDecayFunctionBuilder();
-        gfb3.setParameters("num", Integer.toString(numDocs), Integer.toString(numDocs / 2));
-
-        ActionFuture<SearchResponse> response = client().search(
-                searchRequest().searchType(SearchType.QUERY_THEN_FETCH).source(
-                        searchSource()
-                                .explain(true)
-                                .size(numDocs)
-                                .query(functionScoreQuery(termQuery("test", "value")).add(new MatchAllFilterBuilder(), gfb3).scoreMode(
-                                        "multiply"))));
-        response.actionGet();
-    }
-
     @Test(expected = SearchPhaseExecutionException.class)
     public void testParsingExceptionIfFieldTypeDoesNotMatch() throws Exception {
         createIndexMapped("test", "type", "test", "string", "num", "string");