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Bumps [github.com/jackc/pgx/v4](https://github.com/jackc/pgx) from 4.17.2 to 4.18.1. - [Release notes](https://github.com/jackc/pgx/releases) - [Changelog](https://github.com/jackc/pgx/blob/v4.18.1/CHANGELOG.md) - [Commits](https://github.com/jackc/pgx/compare/v4.17.2...v4.18.1) --- updated-dependencies: - dependency-name: github.com/jackc/pgx/v4 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
62 lines
2.2 KiB
Markdown
62 lines
2.2 KiB
Markdown
[](https://godoc.org/github.com/jackc/pgconn)
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---
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This version is used with pgx `v4`. In pgx `v5` it is part of the https://github.com/jackc/pgx repository.
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---
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# pgconn
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Package pgconn is a low-level PostgreSQL database driver. It operates at nearly the same level as the C library libpq.
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It is primarily intended to serve as the foundation for higher level libraries such as https://github.com/jackc/pgx.
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Applications should handle normal queries with a higher level library and only use pgconn directly when required for
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low-level access to PostgreSQL functionality.
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## Example Usage
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```go
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pgConn, err := pgconn.Connect(context.Background(), os.Getenv("DATABASE_URL"))
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if err != nil {
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log.Fatalln("pgconn failed to connect:", err)
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}
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defer pgConn.Close(context.Background())
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result := pgConn.ExecParams(context.Background(), "SELECT email FROM users WHERE id=$1", [][]byte{[]byte("123")}, nil, nil, nil)
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for result.NextRow() {
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fmt.Println("User 123 has email:", string(result.Values()[0]))
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}
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_, err = result.Close()
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if err != nil {
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log.Fatalln("failed reading result:", err)
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}
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```
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## Testing
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The pgconn tests require a PostgreSQL database. It will connect to the database specified in the `PGX_TEST_CONN_STRING`
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environment variable. The `PGX_TEST_CONN_STRING` environment variable can be a URL or DSN. In addition, the standard `PG*`
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environment variables will be respected. Consider using [direnv](https://github.com/direnv/direnv) to simplify
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environment variable handling.
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### Example Test Environment
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Connect to your PostgreSQL server and run:
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```
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create database pgx_test;
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```
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Now you can run the tests:
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```bash
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PGX_TEST_CONN_STRING="host=/var/run/postgresql dbname=pgx_test" go test ./...
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```
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### Connection and Authentication Tests
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Pgconn supports multiple connection types and means of authentication. These tests are optional. They
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will only run if the appropriate environment variable is set. Run `go test -v | grep SKIP` to see if any tests are being
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skipped. Most developers will not need to enable these tests. See `ci/setup_test.bash` for an example set up if you need change
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authentication code.
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