Baseline7 & 8

• Baseline8
  Modifies and query algorithms
  Now and query queries one stream, then it sorts the result in memory.
  How to pick the stream?
  Priority: the smaller result set has higher priority
  For example: User queries (timestamp AND id). Timestamp stream
  normally returns only one result and ID stream returns four results,
  so Timestamp stream has higher priority than ID stream. We should query
  Timestamp stream, get the result and sort it in memory.

  

• Baseline7
  Baseline6 + database normalization