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Added support for window clause and functions.

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go-jet 2019-09-17 13:34:47 +02:00
parent b7363a554b
commit 5ba10d35db
13 changed files with 973 additions and 48 deletions
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107
tests/postgres/select_test.go
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@ -1615,3 +1615,110 @@ SELECT true,
err := query.Query(db, &struct{}{})
assert.NilError(t, err)
}
func TestWindowFunction(t *testing.T) {
var expectedSQL = `
SELECT AVG(payment.amount) OVER (),
AVG(payment.amount) OVER (PARTITION BY payment.customer_id),
MAX(payment.amount) OVER (ORDER BY payment.payment_date DESC),
MIN(payment.amount) OVER (PARTITION BY payment.customer_id ORDER BY payment.payment_date DESC),
SUM(payment.amount) OVER (PARTITION BY payment.customer_id ORDER BY payment.payment_date DESC ROWS BETWEEN 1 PRECEDING AND 6 FOLLOWING),
SUM(payment.amount) OVER (PARTITION BY payment.customer_id ORDER BY payment.payment_date DESC RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING),
MAX(payment.customer_id) OVER (ORDER BY payment.payment_date DESC ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING),
MIN(payment.customer_id) OVER (PARTITION BY payment.customer_id ORDER BY payment.payment_date DESC),
SUM(payment.customer_id) OVER (PARTITION BY payment.customer_id ORDER BY payment.payment_date DESC),
ROW_NUMBER() OVER (ORDER BY payment.payment_date),
RANK() OVER (ORDER BY payment.payment_date),
DENSE_RANK() OVER (ORDER BY payment.payment_date),
CUME_DIST() OVER (ORDER BY payment.payment_date),
NTILE(11) OVER (ORDER BY payment.payment_date),
LAG(payment.amount) OVER (ORDER BY payment.payment_date),
LAG(payment.amount) OVER (ORDER BY payment.payment_date),
LAG(payment.amount, 2, payment.amount) OVER (ORDER BY payment.payment_date),
LAG(payment.amount, 2, $1) OVER (ORDER BY payment.payment_date),
LEAD(payment.amount) OVER (ORDER BY payment.payment_date),
LEAD(payment.amount) OVER (ORDER BY payment.payment_date),
LEAD(payment.amount, 2, payment.amount) OVER (ORDER BY payment.payment_date),
LEAD(payment.amount, 2, $2) OVER (ORDER BY payment.payment_date),
FIRST_VALUE(payment.amount) OVER (ORDER BY payment.payment_date),
LAST_VALUE(payment.amount) OVER (ORDER BY payment.payment_date),
NTH_VALUE(payment.amount, 3) OVER (ORDER BY payment.payment_date)
FROM dvds.payment
WHERE payment.payment_id < $3
GROUP BY payment.amount, payment.customer_id, payment.payment_date;
`
query := Payment.
SELECT(
AVG(Payment.Amount).OVER(),
AVG(Payment.Amount).OVER(PARTITION_BY(Payment.CustomerID)),
MAXf(Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate.DESC())),
MINf(Payment.Amount).OVER(PARTITION_BY(Payment.CustomerID).ORDER_BY(Payment.PaymentDate.DESC())),
SUMf(Payment.Amount).OVER(PARTITION_BY(Payment.CustomerID).
ORDER_BY(Payment.PaymentDate.DESC()).ROWS(PRECEDING(1), FOLLOWING(6))),
SUMf(Payment.Amount).OVER(PARTITION_BY(Payment.CustomerID).
ORDER_BY(Payment.PaymentDate.DESC()).RANGE(PRECEDING(UNBOUNDED), FOLLOWING(UNBOUNDED))),
MAXi(Payment.CustomerID).OVER(ORDER_BY(Payment.PaymentDate.DESC()).ROWS(CURRENT_ROW, FOLLOWING(UNBOUNDED))),
MINi(Payment.CustomerID).OVER(PARTITION_BY(Payment.CustomerID).ORDER_BY(Payment.PaymentDate.DESC())),
SUMi(Payment.CustomerID).OVER(PARTITION_BY(Payment.CustomerID).ORDER_BY(Payment.PaymentDate.DESC())),
ROW_NUMBER().OVER(ORDER_BY(Payment.PaymentDate)),
RANK().OVER(ORDER_BY(Payment.PaymentDate)),
DENSE_RANK().OVER(ORDER_BY(Payment.PaymentDate)),
CUME_DIST().OVER(ORDER_BY(Payment.PaymentDate)),
NTILE(11).OVER(ORDER_BY(Payment.PaymentDate)),
LAG(Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
LAG(Payment.Amount, 2).OVER(ORDER_BY(Payment.PaymentDate)),
LAG(Payment.Amount, 2, Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
LAG(Payment.Amount, 2, 100).OVER(ORDER_BY(Payment.PaymentDate)),
LEAD(Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
LEAD(Payment.Amount, 2).OVER(ORDER_BY(Payment.PaymentDate)),
LEAD(Payment.Amount, 2, Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
LEAD(Payment.Amount, 2, 100).OVER(ORDER_BY(Payment.PaymentDate)),
FIRST_VALUE(Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
LAST_VALUE(Payment.Amount).OVER(ORDER_BY(Payment.PaymentDate)),
NTH_VALUE(Payment.Amount, 3).OVER(ORDER_BY(Payment.PaymentDate)),
).GROUP_BY(Payment.Amount, Payment.CustomerID, Payment.PaymentDate).
WHERE(Payment.PaymentID.LT(Int(10)))
fmt.Println(query.Sql())
testutils.AssertStatementSql(t, query, expectedSQL, 100, 100, int64(10))
err := query.Query(db, &struct{}{})
assert.NilError(t, err)
}
func TestWindowClause(t *testing.T) {
var expectedSQL = `
SELECT AVG(payment.amount) OVER (),
AVG(payment.amount) OVER (w1),
AVG(payment.amount) OVER (w2 ORDER BY payment.customer_id RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING),
AVG(payment.amount) OVER (w3 RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
FROM dvds.payment
WHERE payment.payment_id < $1
WINDOW w1 AS (PARTITION BY payment.payment_date), w2 AS (w1), w3 AS (w2 ORDER BY payment.customer_id)
ORDER BY payment.customer_id;
`
query := Payment.SELECT(
AVG(Payment.Amount).OVER(),
AVG(Payment.Amount).OVER(Window("w1")),
AVG(Payment.Amount).OVER(
Window("w2").
ORDER_BY(Payment.CustomerID).
RANGE(PRECEDING(UNBOUNDED), FOLLOWING(UNBOUNDED)),
),
AVG(Payment.Amount).OVER(Window("w3").RANGE(PRECEDING(UNBOUNDED), FOLLOWING(UNBOUNDED))),
).
WHERE(Payment.PaymentID.LT(Int(10))).
WINDOW("w1").AS(PARTITION_BY(Payment.PaymentDate)).
WINDOW("w2").AS(Window("w1")).
WINDOW("w3").AS(Window("w2").ORDER_BY(Payment.CustomerID)).
ORDER_BY(Payment.CustomerID)
fmt.Println(query.Sql())
testutils.AssertStatementSql(t, query, expectedSQL, int64(10))
err := query.Query(db, &struct{}{})
assert.NilError(t, err)
}