bug fixed for oracle sql parser

src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleBlockTest4.java

@@ -13,14 +13,16 @@ import com.alibaba.druid.stat.TableStat;
 public class OracleBlockTest4 extends OracleTest {
 
     public void test_0() throws Exception {
-        String sql = "declare "
-                     + " cursor cspid(vspid dba_hist_snapshot.snap_id%type) is "
-                     + "  select end_interval_time , startup_time " //
-                     + "  from dba_hist_snapshot "
-                     + //
-                     "  where snap_id = vspid and instance_number = :inst_num"
-                     + "  and dbid            = :dbid;    "
-                     + "  bsnapt  dba_hist_snapshot.end_interval_time%type;   bstart  dba_hist_snapshot.startup_time%type;   esnapt  dba_hist_snapshot.end_interval_time%type;   estart  dba_hist_snapshot.startup_time%type;  begin    -- Check Begin Snapshot id is valid, get corresponding instance startup time   open cspid(:bid);   fetch cspid into bsnapt, bstart;   if cspid%notfound then     raise_application_error(-20200,       'Begin Snapshot Id '||:bid||' does not exist for this database/instance');   end if;   close cspid;    -- Check End Snapshot id is valid and get corresponding instance startup time   open cspid(:eid);   fetch cspid into esnapt, estart;   if cspid%notfound then     raise_application_error(-20200,       'End Snapshot Id '||:eid||' does not exist for this database/instance');   end if;   if esnapt <= bsnapt then     raise_application_error(-20200,       'End Snapshot Id '||:eid||' must be greater than Begin Snapshot Id '||:bid);   end if;   close cspid;    -- Check startup time is same for begin and end snapshot ids   if ( bstart != estart) then     raise_application_error(-20200,       'The instance was shutdown between snapshots '||:bid||' and '||:eid);   end if;  end;";
+        String sql = "DECLARE" + //
+                     "  done  BOOLEAN;" + //
+                     "BEGIN" + //
+                     "  FOR i IN 1..50 LOOP" + //
+                     "    IF done THEN" + //
+                     "       GOTO end_loop;" + //
+                     "    END IF;" + //
+                     "  <<end_loop>>" + //
+                     "  END LOOP;" + //
+                     "END;";
 
         OracleStatementParser parser = new OracleStatementParser(sql);
         List<SQLStatement> statementList = parser.parseStatementList();