Add ConnStr getter to Pool and Conn structs.

pgxpool/pool.go

@@ -69,6 +69,7 @@ func (cr *connResource) getPoolRows(c *Conn, r pgx.Rows) *poolRows {
 
 type Pool struct {
 	p                 *puddle.Pool
+	connStr           string
 	afterConnect      func(context.Context, *pgx.Conn) error
 	beforeAcquire     func(context.Context, *pgx.Conn) bool
 	afterRelease      func(*pgx.Conn) bool
@@ -141,6 +142,7 @@ func ConnectConfig(ctx context.Context, config *Config) (*Pool, error) {
 	}
 
 	p := &Pool{
+		connStr:           config.ConnConfig.ConnStr,
 		afterConnect:      config.AfterConnect,
 		beforeAcquire:     config.BeforeAcquire,
 		afterRelease:      config.AfterRelease,
@@ -369,6 +371,9 @@ func (p *Pool) AcquireAllIdle(ctx context.Context) []*Conn {
 	return conns
 }
 
+// ConnStr returns the connection string that was used to initialize this pool.
+func (p *Pool) ConnStr() string { return p.connStr }
+
 func (p *Pool) Stat() *Stat {
 	return &Stat{s: p.p.Stat()}
 }

pgxpool/pool_test.go

@@ -14,9 +14,10 @@ import (
 
 func TestConnect(t *testing.T) {
 	t.Parallel()
-
-	pool, err := pgxpool.Connect(context.Background(), os.Getenv("PGX_TEST_DATABASE"))
+	connStr := os.Getenv("PGX_TEST_DATABASE")
+	pool, err := pgxpool.Connect(context.Background(), connStr)
 	require.NoError(t, err)
+	assert.Equal(t, connStr, pool.ConnStr())
 	pool.Close()
 }