[英]How to insert multiple rows into postgres SQL in a go
Is it possible to insert multiple rows into Postgres database at once? 是否可以一次在Postgres数据库中插入多行? Could someone please suggest if there is a way to insert a slice of slices into database.
有人可以建议是否有一种方法可以将切片插入数据库。 I have created a slice for each row and created a another slice(multiple rows) by appending all the row slices to it.
我为每一行创建了一个切片,并通过将所有行切片附加到该切片来创建了另一个切片(多行)。 how do I insert the slice(multiple rows) into db?
如何将切片(多行)插入数据库?
When I create a row slice, I'm using row := []interface{}{}
. 创建行切片时,我使用的是
row := []interface{}{}
。 Because I have fields which are strings and int in each row. 因为我在每一行中都有字符串和整数字段。 Looks like I get an error when I'm inserting data and the error is
unsupported type []interface {}, a slice of interface
插入数据时出现错误,并且错误
unsupported type []interface {}, a slice of interface
Implementation: 实现方式:
rowdata := []interface{}{}
row := []interface{}{data.ScenarioUUID, data.Puid, data.Description, data.Status, data.CreatedBy, data.CreatedAt, data.UpdatedBy, data.UpdatedAt, data.ScopeStartsAt, data.ScopeEndsAt, Metric, MetricName, Channel, date, timeRangeValue}
rowdata = append(rowdata, row)
qry2 := `INSERT INTO sample (scenarioUuid,
puId,
description,
status,
createdBy,
createdAt,
updatedBy,
updatedAt,
scopeStartsAt,
scopeEndsAt,
metric,
metric_name,
channel,
time,
value) VALUES ($1, $2, $3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15)`
if _, err := db.Exec(qry2, rowdata); err != nil {
panic(err)
You could do something like this: 您可以执行以下操作:
samples := // the slice of samples you want to insert
query := `insert into samples (<the list of columns>) values `
values := []interface{}{}
for i, s := range samples {
values = append(values, s.<field1>, s.<field2>, < ... >)
numFields := 15 // the number of fields you are inserting
n := i * numFields
query += `(`
for j := 0; j < numFields; j++ {
query += `$`+strconv.Itoa(n+j+1) + `,`
}
query = query[:len(query)-1] + `),`
}
query = query[:len(query)-1] // remove the trailing comma
db.Exec(query, values...)
https://play.golang.org/p/YqNJKybpwWB https://play.golang.org/p/YqNJKybpwWB
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