gotosocial/vendor/github.com/jackc/pgconn/README.md

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[![](https://godoc.org/github.com/jackc/pgconn?status.svg)](https://godoc.org/github.com/jackc/pgconn)
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# pgconn
Package pgconn is a low-level PostgreSQL database driver. It operates at nearly the same level as the C library libpq.
It is primarily intended to serve as the foundation for higher level libraries such as https://github.com/jackc/pgx.
Applications should handle normal queries with a higher level library and only use pgconn directly when required for
low-level access to PostgreSQL functionality.
## Example Usage
```go
pgConn, err := pgconn.Connect(context.Background(), os.Getenv("DATABASE_URL"))
if err != nil {
log.Fatalln("pgconn failed to connect:", err)
}
defer pgConn.Close(context.Background())
result := pgConn.ExecParams(context.Background(), "SELECT email FROM users WHERE id=$1", [][]byte{[]byte("123")}, nil, nil, nil)
for result.NextRow() {
fmt.Println("User 123 has email:", string(result.Values()[0]))
}
_, err = result.Close()
if err != nil {
log.Fatalln("failed reading result:", err)
}
```
## Testing
The pgconn tests require a PostgreSQL database. It will connect to the database specified in the `PGX_TEST_CONN_STRING`
environment variable. The `PGX_TEST_CONN_STRING` environment variable can be a URL or DSN. In addition, the standard `PG*`
environment variables will be respected. Consider using [direnv](https://github.com/direnv/direnv) to simplify
environment variable handling.
### Example Test Environment
Connect to your PostgreSQL server and run:
```
create database pgx_test;
```
Now you can run the tests:
```bash
PGX_TEST_CONN_STRING="host=/var/run/postgresql dbname=pgx_test" go test ./...
```
### Connection and Authentication Tests
Pgconn supports multiple connection types and means of authentication. These tests are optional. They
will only run if the appropriate environment variable is set. Run `go test -v | grep SKIP` to see if any tests are being
skipped. Most developers will not need to enable these tests. See `ci/setup_test.bash` for an example set up if you need change
authentication code.