for update selects implemented

Author: wumpz

README.md

@@ -25,6 +25,12 @@ Also I would like to know about needed examples or documentation stuff.
 
 ## Extensions in the latest SNAPSHOT version 0.9.2
 
+* first support for *FOR UPDATE*
+
+```sql
+SELECT * FROM user_table FOR UPDATE
+```
+
 ```sql
 UPDATE mytable SET (col) = (SELECT a FROM mytable2)
 ```

src/main/java/net/sf/jsqlparser/statement/select/PlainSelect.java

@@ -50,6 +50,7 @@ public class PlainSelect implements SelectBody {
     private Top top;
     private OracleHierarchicalExpression oracleHierarchical = null;
     private boolean oracleSiblings = false;
+    private boolean forUpdate = false;
 
     /**
      * The {@link FromItem} in this query
@@ -205,6 +206,14 @@ public void setOracleSiblings(boolean oracleSiblings) {
         this.oracleSiblings = oracleSiblings;
     }
 
+    public boolean isForUpdate() {
+        return forUpdate;
+    }
+
+    public void setForUpdate(boolean forUpdate) {
+        this.forUpdate = forUpdate;
+    }
+
     @Override
     public String toString() {
         StringBuilder sql = new StringBuilder("SELECT ");
@@ -260,6 +269,9 @@ public String toString() {
             if (fetch != null) {
             	sql.append(fetch);
             }
+            if (isForUpdate()) {
+                sql.append(" FOR UPDATE");
+            }
         }
         return sql.toString();
     }

src/main/java/net/sf/jsqlparser/util/deparser/SelectDeParser.java

@@ -140,6 +140,9 @@ public void visit(PlainSelect plainSelect) {
         if (plainSelect.getFetch() != null) {
             deparseFetch(plainSelect.getFetch());
         }
+        if (plainSelect.isForUpdate()) {
+            buffer.append(" FOR UPDATE");
+        }
 
     }
 

src/main/javacc/net/sf/jsqlparser/parser/JSqlParserCC.jj

@@ -624,6 +624,8 @@ PlainSelect PlainSelect():
 	[LOOKAHEAD(<K_OFFSET>) offset = Offset() { plainSelect.setOffset(offset);	} ]
 	[LOOKAHEAD(<K_FETCH>) fetch = Fetch() { plainSelect.setFetch(fetch);	} ]
 
+    [ <K_FOR> <K_UPDATE> { plainSelect.setForUpdate(true); } ]
+
 	{
 		plainSelect.setSelectItems(selectItems);
 		plainSelect.setFromItem(fromItem);

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

@@ -1616,4 +1616,9 @@ public void testJsonExpression() throws JSQLParserException {
     public void testSelectInto1() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("SELECT * INTO user_copy FROM user");
     }
+    
+    public void testSelectForUpdate() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("SELECT * FROM user_table FOR UPDATE");
+    }
+    
 }