satellite/metainfo/metabase: use pgx.Batch to delete expired segments

Change-Id: I51eeaadeeef0ca2faabac4b38158278aea177eb8

private/dbutil/cockroachutil/driver.go

@@ -92,6 +92,9 @@ type cockroachConn struct {
 // Assert that cockroachConn fulfills connAll.
 var _ connAll = (*cockroachConn)(nil)
 
+// StdlibConn returns the underlying pgx std connection.
+func (c *cockroachConn) StdlibConn() *stdlib.Conn { return c.underlying }
+
 // Close closes the cockroachConn.
 func (c *cockroachConn) Close() error {
 	return c.underlying.Close()

satellite/metainfo/metabase/delete_expired.go

@@ -9,11 +9,12 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/jackc/pgx/v4"
+	"github.com/jackc/pgx/v4/stdlib"
+	"github.com/zeebo/errs"
 	"go.uber.org/zap"
 
-	"storj.io/common/uuid"
 	"storj.io/storj/private/dbutil"
-	"storj.io/storj/private/dbutil/pgutil"
 	"storj.io/storj/private/tagsql"
 )
 
@@ -117,47 +118,60 @@ func (db *DB) deleteExpiredObjects(ctx context.Context, expiredObjects []ObjectS
 		return nil
 	}
 
-	projectIds := make([]uuid.UUID, len(expiredObjects))
-	buckets := make([][]byte, len(expiredObjects))
-	objectKeys := make([][]byte, len(expiredObjects))
-	versions := make([]int32, len(expiredObjects))
-	streamIDs := make([]uuid.UUID, len(expiredObjects))
-
-	for i, object := range expiredObjects {
-		projectIds[i] = object.ProjectID
-		buckets[i] = []byte(object.BucketName)
-		objectKeys[i] = []byte(object.ObjectKey)
-		versions[i] = int32(object.Version)
-		streamIDs[i] = object.StreamID
+	conn, err := db.db.Conn(ctx)
+	if err != nil {
+		return Error.New("unable to get the raw conn: %w", err)
 	}
-	query := `
-		WITH deleted_objects AS (
-			DELETE FROM objects
-			WHERE
-				(project_id, bucket_name, object_key, version, stream_id) IN (
-					SELECT
-						unnest($1::BYTEA[]),
-						unnest($2::BYTEA[]),
-						unnest($3::BYTEA[]),
-						unnest($4::INT4[]),
-						unnest($5::BYTEA[])
-				)
-			RETURNING 1
-		)
-		DELETE FROM segments
-		WHERE segments.stream_id = ANY($5::BYTEA[])
-	`
-	_, err = db.db.ExecContext(ctx,
-		query,
-		pgutil.UUIDArray(projectIds),
-		pgutil.ByteaArray(buckets),
-		pgutil.ByteaArray(objectKeys),
-		pgutil.Int4Array(versions),
-		pgutil.UUIDArray(streamIDs),
-	)
+	defer func() { err = errs.Combine(err, conn.Close()) }()
 
+	err = conn.Raw(ctx, func(driverConn interface{}) (err error) {
+		defer func() {
+			if closable, ok := driverConn.(interface{ Close() error }); ok {
+				err = errs.Combine(err, closable.Close())
+			}
+		}()
+
+		var pgxconn *pgx.Conn
+		switch conn := driverConn.(type) {
+		case interface{ StdlibConn() *stdlib.Conn }:
+			pgxconn = conn.StdlibConn().Conn()
+		case *stdlib.Conn:
+			pgxconn = conn.Conn()
+		default:
+			return Error.New("invalid raw conn driver %T", driverConn)
+		}
+
+		var batch pgx.Batch
+		for _, obj := range expiredObjects {
+			obj := obj
+
+			batch.Queue(`START TRANSACTION`)
+			batch.Queue(`
+				DELETE FROM objects
+				WHERE (project_id, bucket_name, object_key, version) = ($1::BYTEA, $2::BYTEA, $3::BYTEA, $4)
+					AND stream_id = $5::BYTEA
+			`, obj.ProjectID, []byte(obj.BucketName), []byte(obj.ObjectKey), obj.Version, obj.StreamID)
+			batch.Queue(`
+				DELETE FROM segments
+				WHERE segments.stream_id = $1::BYTEA
+			`, obj.StreamID)
+			batch.Queue(`COMMIT TRANSACTION`)
+		}
+
+		results := pgxconn.SendBatch(ctx, &batch)
+		defer func() { err = errs.Combine(err, results.Close()) }()
+
+		var errlist errs.Group
+		for i := 0; i < batch.Len(); i++ {
+			_, err := results.Exec()
+			errlist.Add(err)
+		}
+
+		return errlist.Err()
+	})
 	if err != nil {
 		return Error.New("unable to delete expired objects: %w", err)
 	}
+
 	return nil
 }