1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
test_that("logicals translated to integers", {
expect_equal(escape(FALSE, con = simulate_sqlite()), sql("0"))
expect_equal(escape(TRUE, con = simulate_sqlite()), sql("1"))
expect_equal(escape(NA, con = simulate_sqlite()), sql("NULL"))
})
test_that("vectorised translations", {
local_con(simulate_sqlite())
expect_equal(translate_sql(paste(x, y)), sql("`x` || ' ' || `y`"))
expect_equal(translate_sql(paste0(x, y)), sql("`x` || `y`"))
})
test_that("pmin and max become MIN and MAX", {
local_con(simulate_sqlite())
expect_equal(translate_sql(pmin(x, y, na.rm = TRUE)), sql('MIN(`x`, `y`)'))
expect_equal(translate_sql(pmax(x, y, na.rm = TRUE)), sql('MAX(`x`, `y`)'))
})
test_that("sqlite mimics two argument log", {
local_con(simulate_sqlite())
expect_equal(translate_sql(log(x)), sql('LOG(`x`)'))
expect_equal(translate_sql(log(x, 10)), sql('LOG(`x`) / LOG(10.0)'))
})
test_that("date-time", {
local_con(simulate_sqlite())
expect_equal(translate_sql(today()), sql("DATE('now')"))
expect_equal(translate_sql(now()), sql("DATETIME('now')"))
})
test_that("custom aggregates translated", {
local_con(simulate_sqlite())
expect_equal(translate_sql(median(x, na.rm = TRUE), window = FALSE), sql('MEDIAN(`x`)'))
expect_equal(translate_sql(sd(x, na.rm = TRUE), window = FALSE), sql('STDEV(`x`)'))
expect_snapshot({
(expect_error(translate_sql(quantile(x, 0.5, na.rm = TRUE), window = FALSE)))
(expect_error(translate_sql(quantile(x, 0.5, na.rm = TRUE), window = TRUE)))
})
})
test_that("custom SQL translation", {
lf <- lazy_frame(x = 1, con = simulate_sqlite())
expect_snapshot(left_join(lf, lf, by = "x", na_matches = "na"))
})
test_that("case_when translates correctly to ELSE when TRUE ~ is used", {
expect_snapshot(
translate_sql(
case_when(
x == 1L ~ "yes",
x == 0L ~ "no",
TRUE ~ "undefined"
),
con = simulate_sqlite()
)
)
})
test_that("full and right join", {
df1 <- lazy_frame(
x = 1:3, y = c("x", "y", "z"),
con = simulate_sqlite()
)
df2 <- lazy_frame(
x = c(1, 3, 5), y = c("a", "b", "c"), z = 11:13,
con = simulate_sqlite()
)
expect_snapshot(full_join(df1, df2, by = "x"))
expect_snapshot(right_join(df2, df1, by = "x"))
})
# live database -----------------------------------------------------------
test_that("as.numeric()/as.double() get custom translation", {
mf <- dbplyr::memdb_frame(x = 1L)
out <- mf %>% mutate(x1 = as.numeric(x), x2 = as.double(x)) %>% collect()
expect_type(out$x1, "double")
expect_type(out$x2, "double")
})
test_that("date extraction agrees with R", {
db <- memdb_frame(x = "2000-01-02 03:40:50.5")
out <- db %>% transmute(
year = year(x),
month = month(x),
day = day(x),
hour = hour(x),
minute = minute(x),
second = second(x),
yday = yday(x),
) %>% collect() %>% as.list()
expect_equal(out, list(
year = 2000,
month = 1,
day = 2,
hour = 3,
minute = 40,
second = 50.5,
yday = 2
))
})
test_that("can explain a query", {
db <- copy_to_test("sqlite", data.frame(x = 1:5), indexes = list("x"))
expect_snapshot(db %>% filter(x > 2) %>% explain())
})
test_that("full and right join work", {
df1 <- memdb_frame(x = 1:3, y = c("x", "y", "z"))
df2 <- memdb_frame(x = c(1, 3, 5), y = c("a", "b", "c"), z = 11:13)
expect_equal(
collect(full_join(df1, df2, by = "x")),
tibble(
x = c(1, 2, 3, 5),
y.x = c("x", "y", "z", NA),
y.y = c("a", NA, "b", "c"),
z = c(11, NA, 12, 13)
)
)
expect_equal(
collect(right_join(df2, df1, by = "x")),
tibble(
x = c(1, 2, 3),
y.x = c("a", NA, "b"),
z = c(11, NA, 12),
y.y = c("x", "y", "z")
)
)
})
|
