table: Add RewriteRows

table/rewrite.go

@@ -0,0 +1,31 @@
+// Copyright (C) 2017 ScyllaDB
+// Use of this source code is governed by a ALv2-style
+// license that can be found in the LICENSE file.
+
+package table
+
+import (
+	"github.com/scylladb/gocqlx/v2"
+)
+
+// RewriteRows performs a sequential rewrite of all rows in a table.
+func RewriteRows(session gocqlx.Session, t *Table, options ...func(q *gocqlx.Queryx)) error {
+	insert := t.InsertQuery(session)
+	defer insert.Release()
+
+	// Apply query options
+	for _, o := range options {
+		o(insert)
+	}
+
+	// Iterate over all rows and reinsert them
+	iter := session.Query(t.SelectAll()).Iter()
+	m := make(map[string]interface{})
+	for iter.MapScan(m) {
+		if err := insert.BindMap(m).Exec(); err != nil {
+			return err
+		}
+		m = make(map[string]interface{})
+	}
+	return iter.Close()
+}