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Mappings: Allow to force dots in field names #19937

merged 1 commit into from Aug 11, 2016
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Just for now

@@ -26,6 +26,7 @@
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.Version;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.CopyOnWriteHashMap;
@@ -61,6 +62,9 @@
public static final String CONTENT_TYPE = "object";
public static final String NESTED_CONTENT_TYPE = "nested";

private static final boolean DOTS_IN_FIELD_ALLOWED = Booleans.parseBooleanExact(
System.getProperty("mapper.allow_dots_in_name", "false"));

public static class Defaults {
public static final boolean ENABLED = true;
public static final Nested NESTED = Nested.NO;
@@ -269,7 +273,7 @@ protected static void parseProperties(ObjectMapper.Builder objBuilder, Map<Strin
while (iterator.hasNext()) {
Map.Entry<String, Object> entry =;
String fieldName = entry.getKey();
if (fieldName.contains(".")) {
if (fieldName.contains(".") && DOTS_IN_FIELD_ALLOWED == false) {
throw new MapperParsingException("Field name [" + fieldName + "] cannot contain '.'");
// Should accept empty arrays, as a work around for when the
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