Jackc/pgx: Difference between revisions
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go get github.com/jackc/pgx/v5 | go get github.com/jackc/pgx/v5 | ||
</syntaxhighlight> | </syntaxhighlight> | ||
=Programming Model= | |||
See: {{Internal|PostgreSQL_Support_in_Go#With_jackc/pgx|PostgreSQL Support in Go}} | |||
=Database Operations= | =Database Operations= |
Revision as of 22:27, 30 May 2024
External
- https://github.com/jackc/pgx
- https://github.com/jackc/pgx/wiki/Getting-started-with-pgx
- https://www.youtube.com/watch?v=sXMSWhcHCf8
Internal
Overview
jackc/pgx
is a PostgreSQL low-level, high performance driver and toolkit that exposes PostgreSQL-specific features such as LISTEN/NOTIFY and COPY. It also includes an adapter for the standard database/sql
package, but using database/sql
is optional. It understands PostgreSQL data types. jackc/pgx
is recommended when the application only targets PostgreSQL.
Installation
go get github.com/jackc/pgx/v5
Programming Model
See:
Database Operations
Open a Connection
import (
"context"
"fmt"
"os"
"github.com/jackc/pgx/v5"
)
...
ctx := context.Background()
connectionString := "postgres://postgres:@localhost:5432"
conn, err := pgx.Connect(ctx, connectionString)
if err != nil {
...
}
defer func() {
if err = conn.Close(ctx); err != nil {
...
}
}()
if err = conn.Ping(ctx); err != nil {
...
}
fmt.Printf("success\n")
Create a Schema
sql := `CREATE SCHEMA IF NOT EXISTS blue`
commandTag, err := conn.Exec(ctx, sql)
if err != nil {
...
} else {
fmt.Printf("%s\n", commandTag)
}
Create a Table
sql := `CREATE TABLE IF NOT EXISTS BLUE.TEST ("ID" int, "NAME" varchar(10))`
commandTag, err = db.Exec(sql)
if err != nil {
...
} else {
fmt.Printf("%s\n", commandTag)
}
Delete a Table
Insert a Row
commandTag, err := conn.Exec(context.B, `INSERT INTO someschema.sometable ("id", "color", "size") VALUES ($1, $2, $3)`, 1, "red", 15)
if err != nil {
...
} else {
fmt.Printf("%s\n", commandTag)
}
Query
rows, err := conn.Query(ctx, `SELECT "id", "color", "lab_id", "size" FROM someschema.sometable`)
if err != nil {
...
}
for rows.Next() {
var (
id string
color string
size string
)
err = rows.Scan(&id, &color, &size)
if err != nil {
...
} else {
fmt.Printf("%s, %s, %s, %s, %v\n", id, fleetID, labID, category, keys)
}
}