Fix ANTLR grammar for negative integer and floating point number

src/main/antlr/OpenDistroSqlLexer.g4

@@ -330,7 +330,7 @@ STRING_USER_NAME:                   (
 // Fragments for Literal primitives
 
 fragment EXPONENT_NUM_PART:         'E' [-+]? DEC_DIGIT+;
-fragment ID_LITERAL:                [A-Z_$0-9@]*?[A-Z_$\-]+?[A-Z_$\-0-9]*;
+fragment ID_LITERAL:                [A-Z_$0-9@]*?[A-Z_$]+?[A-Z_$\-0-9]*;
 fragment DQUOTA_STRING:             '"' ( '\\'. | '""' | ~('"'| '\\') )* '"';
 fragment SQUOTA_STRING:             '\'' ('\\'. | '\'\'' | ~('\'' | '\\'))* '\'';
 fragment BQUOTA_STRING:             '`' ( '\\'. | '``' | ~('`'|'\\'))* '`';

src/test/java/com/amazon/opendistroforelasticsearch/sql/antlr/semantic/SemanticAnalyzerConstantTest.java

@@ -0,0 +1,33 @@
+/*
+ *    Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License").
+ *    You may not use this file except in compliance with the License.
+ *    A copy of the License is located at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    or in the "license" file accompanying this file. This file is distributed
+ *    on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ *    express or implied. See the License for the specific language governing
+ *    permissions and limitations under the License.
+ *
+ */
+
+package com.amazon.opendistroforelasticsearch.sql.antlr.semantic;
+
+import org.junit.Test;
+
+public class SemanticAnalyzerConstantTest extends SemanticAnalyzerTestBase {
+
+    @Test
+    public void useNegativeIntegerShouldPass() {
+        validate("SELECT * FROM test WHERE age > -1");
+    }
+
+    @Test
+    public void useNegativeFloatingPointNumberShouldPass() {
+        validate("SELECT * FROM test WHERE balance > -1.23456");
+    }
+
+}

src/test/java/com/amazon/opendistroforelasticsearch/sql/esintgtest/QueryAnalysisIT.java

@@ -20,14 +20,10 @@
 import com.amazon.opendistroforelasticsearch.sql.exception.SqlFeatureNotImplementedException;
 import com.amazon.opendistroforelasticsearch.sql.exception.SqlParseException;
 import com.amazon.opendistroforelasticsearch.sql.utils.StringUtils;
-import org.elasticsearch.action.index.IndexRequest;
-import org.elasticsearch.action.index.IndexResponse;
 import org.elasticsearch.client.Request;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.client.ResponseException;
-import org.elasticsearch.client.RestClient;
 import org.elasticsearch.rest.RestStatus;
-import org.elasticsearch.test.ESIntegTestCase;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -36,7 +32,6 @@
 import static com.amazon.opendistroforelasticsearch.sql.plugin.SqlSettings.QUERY_ANALYSIS_ENABLED;
 import static com.amazon.opendistroforelasticsearch.sql.plugin.SqlSettings.QUERY_ANALYSIS_SEMANTIC_SUGGESTION;
 import static com.amazon.opendistroforelasticsearch.sql.plugin.SqlSettings.QUERY_ANALYSIS_SEMANTIC_THRESHOLD;
-import static org.elasticsearch.common.xcontent.XContentType.JSON;
 import static org.elasticsearch.rest.RestStatus.BAD_REQUEST;
 import static org.elasticsearch.rest.RestStatus.OK;
 import static org.elasticsearch.rest.RestStatus.SERVICE_UNAVAILABLE;
@@ -251,6 +246,14 @@ public void queryWithUnsupportedFunctionShouldFail() {
         );
     }
 
+    @Test
+    public void useNegativeNumberConstantShouldPass() {
+        queryShouldPassAnalysis(
+            "SELECT * FROM elasticsearch-sql_test_index_bank " +
+            "WHERE age > -1 AND balance < -123.456789"
+        );
+    }
+
     /** Run the query with cluster setting changed and cleaned after complete */
     private void runWithClusterSetting(ClusterSetting setting, Runnable query) {
         try {