Merge pull request #421 from den-crane/Feature/bugfix/result-without-columns

fixes #208 - Result without columns by adding a new line before format

Author: alex-krash

src/main/java/ru/yandex/clickhouse/ClickHouseStatementImpl.java

@@ -464,8 +464,8 @@ private static String addFormatIfAbsent(final String sql, ClickHouseFormat forma
         int idx = cleanSQL.endsWith(";")
             ? cleanSQL.length() - 1
             : cleanSQL.length();
-        sb.append(cleanSQL.substring(0, idx))
-          .append(" FORMAT ")
+        sb.append(cleanSQL, 0, idx)
+          .append("\nFORMAT ")
           .append(format.name())
           .append(';');
         return sb.toString();

src/test/java/ru/yandex/clickhouse/ClickHouseStatementTest.java

@@ -23,22 +23,41 @@ public class ClickHouseStatementTest {
     @Test
     public void testClickhousify() throws Exception {
         String sql = "SELECT ololo FROM ololoed;";
-        assertEquals("SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;", ClickHouseStatementImpl.clickhousifySql(sql));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql), "SELECT ololo FROM ololoed\nFORMAT TabSeparatedWithNamesAndTypes;");
 
         String sql2 = "SELECT ololo FROM ololoed";
-        assertEquals("SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;", ClickHouseStatementImpl.clickhousifySql(sql2));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql2), "SELECT ololo FROM ololoed\nFORMAT TabSeparatedWithNamesAndTypes;");
 
         String sql3 = "SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes";
-        assertEquals("SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes", ClickHouseStatementImpl.clickhousifySql(sql3));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql3), "SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes");
 
         String sql4 = "SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;";
-        assertEquals("SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;", ClickHouseStatementImpl.clickhousifySql(sql4));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql4), "SELECT ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;");
 
         String sql5 = "SHOW ololo FROM ololoed;";
-        assertEquals("SHOW ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;", ClickHouseStatementImpl.clickhousifySql(sql5));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql5), "SHOW ololo FROM ololoed\nFORMAT TabSeparatedWithNamesAndTypes;");
 
         String sql6 = " show ololo FROM ololoed;";
-        assertEquals("show ololo FROM ololoed FORMAT TabSeparatedWithNamesAndTypes;", ClickHouseStatementImpl.clickhousifySql(sql6));
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql6), "show ololo FROM ololoed\nFORMAT TabSeparatedWithNamesAndTypes;");
+
+        String sql7 = "SELECT ololo FROM ololoed \nFORMAT TabSeparatedWithNamesAndTypes";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql7), "SELECT ololo FROM ololoed \nFORMAT TabSeparatedWithNamesAndTypes");
+
+        String sql8 = "SELECT ololo FROM ololoed \n\n FORMAT TabSeparatedWithNamesAndTypes";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql8), "SELECT ololo FROM ololoed \n\n FORMAT TabSeparatedWithNamesAndTypes");
+
+        String sql9 = "SELECT ololo FROM ololoed\n-- some comments one line";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql9), "SELECT ololo FROM ololoed\n-- some comments one line\nFORMAT TabSeparatedWithNamesAndTypes;");
+
+        String sql10 = "SELECT ololo FROM ololoed\n-- some comments\ntwo line";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql10), "SELECT ololo FROM ololoed\n-- some comments\ntwo line\nFORMAT TabSeparatedWithNamesAndTypes;");
+
+        String sql11 = "SELECT ololo FROM ololoed/*\nsome comments\ntwo line*/";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql11), "SELECT ololo FROM ololoed/*\nsome comments\ntwo line*/\nFORMAT TabSeparatedWithNamesAndTypes;");
+
+        String sql12 = "SELECT ololo FROM ololoed\n// c style some comments one line";
+        assertEquals(ClickHouseStatementImpl.clickhousifySql(sql12), "SELECT ololo FROM ololoed\n// c style some comments one line\nFORMAT TabSeparatedWithNamesAndTypes;");
+
     }
 
     @Test

src/test/java/ru/yandex/clickhouse/integration/ClickHousePreparedStatementTest.java

@@ -365,8 +365,10 @@ public void clickhouseJdbcFailsBecauseOfCommentInStart() throws Exception {
     @Test
     public void testTrailingParameter() throws Exception {
         String sqlStatement =
-            "SELECT 42 AS foo, 23 AS bar "
+         // "SELECT 42 AS foo, 23 AS bar "
+            "SELECT 42 AS foo, 23 AS bar from numbers(100) "
           + "ORDER BY foo DESC LIMIT ?, ?";
+
         PreparedStatement stmt = connection.prepareStatement(sqlStatement);
         stmt.setInt(1, 42);
         stmt.setInt(2, 23);