fixes #142

Author: wumpz

src/main/java/net/sf/jsqlparser/util/TablesNamesFinder.java

@@ -172,6 +172,13 @@ public List<String> getTableList(CreateTable create) {
 
         return tables;
     }
+    
+    public List<String> getTableList(Expression expr) {
+        init();
+        expr.accept(this);
+
+        return tables;
+    }
 
     @Override
     public void visit(WithItem withItem) {

src/test/java/net/sf/jsqlparser/util/TablesNamesFinderTest.java

@@ -8,8 +8,10 @@
 import java.util.List;
 import java.util.StringTokenizer;
 import net.sf.jsqlparser.JSQLParserException;
+import net.sf.jsqlparser.expression.Expression;
 
 import net.sf.jsqlparser.parser.CCJSqlParserManager;
+import net.sf.jsqlparser.parser.CCJSqlParserUtil;
 import net.sf.jsqlparser.statement.create.table.CreateTable;
 import net.sf.jsqlparser.statement.delete.Delete;
 import net.sf.jsqlparser.statement.insert.Insert;
@@ -317,6 +319,16 @@ public void testInsertSubSelect() throws JSQLParserException {
         assertTrue(tableList.contains("Customers"));
         assertTrue(tableList.contains("Suppliers"));
     }
+    
+    @Test
+    public void testExpr() throws JSQLParserException {
+        String sql = "mycol in (select col2 from mytable)";
+        Expression expr = (Expression) CCJSqlParserUtil.parseCondExpression(sql);
+        TablesNamesFinder tablesNamesFinder = new TablesNamesFinder();
+		List<String> tableList = tablesNamesFinder.getTableList(expr);
+        assertEquals(1, tableList.size());
+        assertTrue(tableList.contains("mytable"));
+    }
 
 	private String getLine(BufferedReader in) throws Exception {
 		return CCJSqlParserManagerTest.getLine(in);