fixes #909

Author: wumpz

README.md

@@ -75,6 +75,9 @@ Also I would like to know about needed examples or documentation stuff.
 * support for table function in **IN** expression
 * allow complex expressions within all of a **case when** statement
 * support for parameters in **create index** statement
+* support for integer parameters for **->>** and **->** JSON expressions
+* support for more keywords in following parts of multipart object names (e.g. **mytab.select, mytab.create, ...**)
+* support for **OUTER APPLY**
 
 ## Extensions of JSqlParser releases
 

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

@@ -3084,8 +3084,8 @@ JsonExpression JsonExpression() : {
 }
 {
     column=Column() (
-        "->" token=<S_CHAR_LITERAL> {result.addIdent(token.image,"->");} | 
-        "->>" token=<S_CHAR_LITERAL> {result.addIdent(token.image,"->>");} |
+        "->" (token=<S_CHAR_LITERAL> | token=<S_LONG>) {result.addIdent(token.image,"->");} | 
+        "->>" (token=<S_CHAR_LITERAL> | token=<S_LONG>) {result.addIdent(token.image,"->>");} |
         "#>" token=<S_CHAR_LITERAL> {result.addIdent(token.image,"#>");} |
         "#>>" token=<S_CHAR_LITERAL> {result.addIdent(token.image,"#>>");}
     )+

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

@@ -2584,6 +2584,11 @@ public void testJsonExpression() throws JSQLParserException {
             assertStatementCanBeDeparsedAs(select, statement, true);
         }
     }
+    
+    @Test
+    public void testJsonExpressionWithIntegerParameterIssue909() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("select uc.\"id\", u.nickname, u.avatar, b.title, uc.images, uc.created_at as createdAt from library.ugc_comment uc INNER JOIN library.book b on (uc.books_id ->> 0)::INTEGER = b.\"id\" INNER JOIN library.users u ON uc.user_id = u.user_id where uc.id = 1", true);
+    }
 
     @Test
     public void testSqlNoCache() throws JSQLParserException {