fixes #1414

Author: wumpz

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -1633,7 +1633,7 @@ String RelObjectNameWithoutValue() :
 {    Token tk = null; }
 {
     (tk=<S_IDENTIFIER> | tk=<S_QUOTED_IDENTIFIER> 
-      | tk=<K_ALGORITHM> 
+      | tk=<K_ALGORITHM> | tk=<K_AT>
       | tk=<K_BYTE> | tk=<K_CHAR> | tk=<K_CHANGE> | tk=<K_CHARACTER>
       | tk=<K_CAST> | tk=<K_COMMENT> | tk=<K_COSTS> | tk=<K_DISABLE> | tk=<K_DESC>
       | tk=<K_DO> | tk=<K_EXTRACT> | tk=<K_FILTER> | tk=<K_FIRST> | tk=<K_FOLLOWING> | tk=<K_JSON>
@@ -3763,7 +3763,7 @@ Expression PrimaryExpression() #PrimaryExpression:
         retval=castExpr;
     } )*
 
-    ( <K_AT> <K_DATETIMELITERAL> <K_ZONE> timezoneRightExpr=PrimaryExpression() {
+    ( LOOKAHEAD(2) <K_AT> <K_DATETIMELITERAL> <K_ZONE> timezoneRightExpr=PrimaryExpression() {
         if (timezoneExpr == null)
             timezoneExpr = new TimezoneExpression();
 

src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java

@@ -4956,4 +4956,9 @@ public void testLogicalExpressionSelectItemIssue1381() throws JSQLParserExceptio
         assertSqlCanBeParsedAndDeparsed(
                 "SELECT ( 1 = 1 ) AND ( 1 = 2 )", true);
     }
+    
+    @Test
+    public void testKeywordAtIssue1414() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("SELECT * FROM table1 at");
+    }
 }