问卡桑德拉-删除的数据仍然在那里

EN

DELETE FROM mytable WHERE symbol = 'symbol1' AND field = 'field1';

SELECT symbol, ts, value FROM mytable WHERE symbol IN ('symbol1') AND field='field1' AND ts >= '2013-09-04 00:00:00+0000' AND ts <= '2014-09-25 00:00:00+0000';

CREATE TABLE mytable (
  symbol text,
  field text,
  ts timestamp,
  value double,
  PRIMARY KEY (symbol, field, ts)
) WITH
  bloom_filter_fp_chance=0.010000 AND
  caching='KEYS_ONLY' AND
  comment='' AND
  dclocal_read_repair_chance=0.000000 AND
  gc_grace_seconds=864000 AND
  read_repair_chance=0.100000 AND
  replicate_on_write='true' AND
  populate_io_cache_on_flush='false' AND
  compaction={'class': 'SizeTieredCompactionStrategy'} AND
  compression={'sstable_compression': 'SnappyCompressor'};