fixes #1502

Author: wumpz

src/main/java/net/sf/jsqlparser/util/validation/validator/SelectValidator.java

@@ -92,11 +92,13 @@ public void visit(PlainSelect plainSelect) {
             validateOptionalFeature(c, plainSelect.getOptimizeFor(), Feature.optimizeFor);
         } // end for
 
-        validateOptionalList(plainSelect.getSelectItems(), () -> this, (e, v) -> e.accept(v));
-
         validateOptionalFromItem(plainSelect.getFromItem());
         validateOptionalFromItems(plainSelect.getIntoTables());
         validateOptionalJoins(plainSelect.getJoins());
+        
+        // to correctly recognize aliased tables
+        validateOptionalList(plainSelect.getSelectItems(), () -> this, (e, v) -> e.accept(v));
+        
         validateOptionalExpression(plainSelect.getWhere());
         validateOptionalExpression(plainSelect.getOracleHierarchical());
 

src/test/java/net/sf/jsqlparser/util/validation/metadata/DatabaseMetaDataValidationTest.java

@@ -131,4 +131,10 @@ public void testValidationDropViewDoesNotExist() throws JSQLParserException, SQL
         validateMetadata(sql, 1, 1, meta, true, String.format("public.anotherView", databaseName));
     }
 
+    @Test
+    public void testValidationMetadataSelectWithColumnsAndAlias2() throws JSQLParserException, SQLException {
+        String sql = "select my.id from mytable as my";
+        JdbcDatabaseMetaDataCapability meta = new JdbcDatabaseMetaDataCapability(connection, NamesLookup.UPPERCASE);
+        validateNoErrors(sql, 1, DatabaseType.H2, meta); // no errors
+    }
 }

src/test/java/net/sf/jsqlparser/util/validation/validator/SelectValidatorTest.java

@@ -178,4 +178,15 @@ public void testValidateLateral() throws JSQLParserException {
                 1, DatabaseType.POSTGRESQL, DatabaseType.ORACLE);
     }
 
+    @Test
+    public void testValidateIssue1502() throws JSQLParserException {
+        validateNoErrors(
+                "select b.id, name ,(select name from Blog where name = 'sadf') as name2 "
+                + ", category, owner, b.update_time "
+                + "from Blog as b "
+                + "left join Content "
+                + "ON b.id = Content.blog_id "
+                + "where name = 'sadf' order by Content.title desc",
+                1, DatabaseType.POSTGRESQL);
+    }    
 }