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moves quantile bins to use postgres precentile functions

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This commit is contained in:
Andy Eschbacher
2017-12-05 16:16:39 -05:00
parent 5243192296
commit 691b9a8312
3 changed files with 39 additions and 51 deletions
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18
test/CDB_QuantileBinsTest.sql
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@@ -1,11 +1,17 @@
WITH data AS (
SELECT array_agg(x::numeric) s FROM generate_series(1,100) x
WHERE x % 5 != 0 AND x % 7 != 0
SELECT array_agg(x::numeric) AS s
FROM generate_series(0, 99) AS x
)
SELECT unnest(CDB_QuantileBins(s, 7)) FROM data;
SELECT unnest(CDB_QuantileBins(s, 10))
FROM data;
WITH data_nulls AS (
SELECT array_agg(CASE WHEN x % 2 != 0 THEN x ELSE NULL END::numeric) s FROM generate_series(1,100) x
WHERE x % 5 != 0 AND x % 7 != 0
SELECT array_agg(x::numeric)
FROM (
SELECT x FROM generate_series(0, 99) AS x
UNION ALL
SELECT null AS s FROM generate_series(1, 10) AS x
) _wrap
)
SELECT unnest(CDB_QuantileBins(s, 7)) FROM data_nulls;
SELECT unnest(CDB_QuantileBins(s, 10))
FROM data_nulls;