Jackc/pgx: Difference between revisions
Jump to navigation
Jump to search
(7 intermediate revisions by the same user not shown) | |||
Line 12: | Line 12: | ||
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}} | |||
= | ==Create a Schema== | ||
== | <syntaxhighlight lang='go'> | ||
sql := `CREATE SCHEMA IF NOT EXISTS blue` | |||
commandTag, err := conn.Exec(ctx, sql) | |||
if err != nil { | |||
... | |||
} else { | |||
fmt.Printf("%s\n", commandTag) | |||
} | |||
</syntaxhighlight> | |||
==Create a Table== | |||
<syntaxhighlight lang='go'> | |||
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) | |||
} | |||
</syntaxhighlight> | |||
==Delete a Table== | |||
==Insert a Row== | |||
<syntaxhighlight lang='go'> | |||
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) | |||
} | |||
</syntaxhighlight> | |||
==Query== | |||
<syntaxhighlight lang='go'> | |||
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) | |||
} | |||
} | |||
</syntaxhighlight> |
Latest 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:
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)
}
}