SQL: counts should be integers

[pbailis]

Output for counts in SQL (outlier_count, total_count) are formatted as floats, but counts should always be integer-valued (I think).

e.g.,

macrobase-sql> SELECT * FROM DIFF(SPLIT (SELECT *, percentile(battery_drain) AS percentile from mobile) WHERE percentile > .99) ON *;
67156 [main] INFO  QueryEngine  - Using user_id, state, hw_make, firmware_version, app_version as candidate attributes for explanation
67265 [main] INFO  APLSummarizer  - Encoded in: 109 ms
67265 [main] INFO  APLSummarizer  - Encoded Categories: 2
67299 [main] INFO  APLSummarizer  - Number of results: 2
2 rows

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|    app_version     |      user_id       |      hw_make       |       state        |  firmware_version  |      support       |    global_ratio    |   outlier_count    |    total_count     |
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|        v50         |         -          |         -          |         -          |         -          |      .873185       |     89.883198      |       902.0        |       1003.0       |
|         -          |         -          |       Emdoor       |         -          |         -          |      .873185       |     89.883198      |       902.0        |       1003.0       |
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[pbailis]

Related: Is there a reason why we have outlier_count versus a more generic population_A_cnt and population_B_cnt?