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s3 select: fix date_diff behavior (#11786)

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Fixes #11785 and adds tests for samples given.
This commit is contained in:
Klaus Post 2021-03-15 22:15:52 +01:00 committed by GitHub
parent 642ba3f2d6
commit e5a1a2a974
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2 changed files with 50 additions and 25 deletions
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41
pkg/s3select/select_test.go
View File

@ -337,6 +337,47 @@ func TestJSONQueries(t *testing.T) {
}`,
wantResult: `{"element_type":"__elem__merfu","element_id":"d868aefe-ef9a-4be2-b9b2-c9fd89cc43eb","attributes":{"__attr__image_dpi":300,"__attr__image_size":[2550,3299],"__attr__image_index":2,"__attr__image_format":"JPEG","__attr__file_extension":"jpg","__attr__data":null}}`,
},
{
name: "date_diff_month",
query: `SELECT date_diff(MONTH, '2019-10-20T', '2020-01-20T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":3}`,
},
{
name: "date_diff_month_neg",
query: `SELECT date_diff(MONTH, '2020-01-20T', '2019-10-20T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":-3}`,
},
// Examples from https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-glacier-select-sql-reference-date.html#s3-glacier-select-sql-reference-date-diff
{
name: "date_diff_year",
query: `SELECT date_diff(year, '2010-01-01T', '2011-01-01T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":1}`,
},
{
name: "date_diff_year",
query: `SELECT date_diff(month, '2010-01-01T', '2010-05T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":4}`,
},
{
name: "date_diff_month_oney",
query: `SELECT date_diff(month, '2010T', '2011T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":12}`,
},
{
name: "date_diff_month_neg",
query: `SELECT date_diff(month, '2011T', '2010T') FROM S3Object LIMIT 1`,
wantResult: `{"_1":-12}`,
},
{
name: "date_diff_days",
query: `SELECT date_diff(day, '2010-01-01T23:00:00Z', '2010-01-02T01:00:00Z') FROM S3Object LIMIT 1`,
wantResult: `{"_1":0}`,
},
{
name: "date_diff_days_one",
query: `SELECT date_diff(day, '2010-01-01T23:00:00Z', '2010-01-02T23:00:00Z') FROM S3Object LIMIT 1`,
wantResult: `{"_1":1}`,
},
}
defRequest := `<?xml version="1.0" encoding="UTF-8"?>

34
pkg/s3select/sql/timestampfuncs.go
View File

@ -135,10 +135,6 @@ func dateAdd(timePart string, qty float64, t time.Time) (*Value, error) {
return FromTimestamp(t.Add(duration)), nil
}
const (
dayInNanoseconds = time.Hour * 24
)
// dateDiff computes the difference between two times in terms of the
// `timePart` which can be years, months, days, hours, minutes or
// seconds. For difference in years, months or days, the time part,
@ -146,42 +142,30 @@ const (
func dateDiff(timePart string, ts1, ts2 time.Time) (*Value, error) {
if ts2.Before(ts1) {
v, err := dateDiff(timePart, ts2, ts1)
v.negate()
if err == nil {
v.negate()
}
return v, err
}
duration := ts2.Sub(ts1)
y1, m1, d1 := ts1.Date()
y2, m2, d2 := ts2.Date()
dy, dm := int64(y2-y1), int64(m2-m1)
switch timePart {
case timePartYear:
dy := int64(y2 - y1)
if m2 > m1 || (m2 == m1 && d2 >= d1) {
return FromInt(dy), nil
}
return FromInt(dy - 1), nil
case timePartMonth:
months := 12 * dy
if m2 >= m1 {
months += dm
} else {
months += 12 + dm
}
if d2 < d1 {
months--
}
return FromInt(months), nil
m1 += time.Month(12 * y1)
m2 += time.Month(12 * y2)
return FromInt(int64(m2 - m1)), nil
case timePartDay:
// To compute the number of days between two times
// using the time package, zero out the time portions
// of the timestamps, compute the difference duration
// and then divide by the length of a day.
d1 := time.Date(y1, m1, d1, 0, 0, 0, 0, time.UTC)
d2 := time.Date(y2, m2, d2, 0, 0, 0, 0, time.UTC)
diff := d2.Sub(d1)
days := diff / dayInNanoseconds
return FromInt(int64(days)), nil
return FromInt(int64(duration / (24 * time.Hour))), nil
case timePartHour:
hours := duration / time.Hour
return FromInt(int64(hours)), nil