def test_agg_by_2(self):
test_table = empty_table(10)
test_table = test_table.update(
["grp_id=(int)(i/5)", "var=(int)i", "weights=(double)1.0/(i+1)"])
aggs = [
group(["aggGroup=var"]),
avg(["aggAvg=var"]),
count_("aggCount"),
first(["aggFirst=var"]),
last(["aggLast=var"]),
max_(["aggMax=var"]),
median(["aggMed=var"]),
min_(["aggMin=var"]),
pct(0.20, ["aggPct=var"]),
std(["aggStd=var"]),
sum_(["aggSum=var"]),
abs_sum(["aggAbsSum=var"]),
var(["aggVar=var"]),
weighted_avg("var", ["weights"]),
]
result_table = test_table.agg_by(aggs, ["grp_id"])
self.assertGreaterEqual(result_table.size, 1)
for agg in aggs:
result_table = test_table.agg_by(agg, "grp_id")
self.assertGreaterEqual(result_table.size, 1)
def test_agg_all_by(self):
test_table = empty_table(10)
test_table = test_table.update(
["grp_id=(int)(i/5)", "var=(int)i", "weights=(double)1.0/(i+1)"])
aggs = [
group(),
avg(),
first(),
last(),
max_(),
median(),
min_(),
pct(0.20),
std(),
sum_(),
abs_sum(),
var(),
weighted_avg("var"),
]
for agg in aggs:
with self.subTest(agg):
result_table = test_table.agg_all_by(agg, ["grp_id"])
self.assertGreaterEqual(result_table.size, 1)
# column names in the Aggregation are ignored
aggs = [
group(["aggGroup=var"]),
avg(["aggAvg=var"]),
pct(0.20, ["aggPct=var"]),
std(["aggStd=var"]),
sum_(["aggSum=var"]),
abs_sum(["aggAbsSum=var"]),
var(["aggVar=var"]),
weighted_avg("var", ["weights"]),
]
for agg in aggs:
with self.subTest(agg):
result_table = test_table.agg_all_by(agg, ["grp_id"])
self.assertGreaterEqual(result_table.size, 1)
with self.assertRaises(DHError) as cm:
test_table.agg_all_by(count_("aggCount"), "grp_id")
self.assertIn("unsupported", cm.exception.root_cause)
for agg in aggs:
with self.subTest(agg):
result_table = test_table.agg_all_by(agg)
self.assertEqual(result_table.size, 1)
value_spec=ck.json_spec([('user_id', dh.int_),
('url', dh.string),
('channel', dh.string),
('received_at', dh.DateTime)]),
table_type=TableType.Append)
pageviews_stg = pageviews \
.update_view([
'url_path = url.split(`/`)',
'pageview_type = url_path[1]',
'target_id = Long.parseLong(url_path[2])'
]).drop_columns('url_path')
purchases_by_item = purchases.agg_by([
agg.sum_(['revenue = purchase_price']),
agg.count_('orders'),
agg.sum_(['items_sold = quantity'])
], 'item_id')
pageviews_by_item = pageviews_stg \
.where(['pageview_type = `products`']) \
.count_by('pageviews', ['item_id = target_id'])
item_summary = items \
.view(['item_id = id', 'name', 'category']) \
.natural_join(purchases_by_item, on = ['item_id']) \
.natural_join(pageviews_by_item, on = ['item_id']) \
.drop_columns('item_id') \
.move_columns_down(['revenue', 'pageviews']) \
.update_view(['conversion_rate = orders / (double) pageviews'])