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diff --git a/sql/wsrep_schema.h b/sql/wsrep_schema.h
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+/* Copyright (C) 2015-2019 Codership Oy <info@codership.com>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation, Inc.,
+   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
+
+
+#ifndef WSREP_SCHEMA_H
+#define WSREP_SCHEMA_H
+
+/* wsrep-lib */
+#include "wsrep_types.h"
+
+#include "mysqld.h"
+#include "wsrep_mysqld.h"
+
+/*
+  Forward decls
+*/
+class THD;
+class Relay_log_info;
+struct TABLE;
+struct TABLE_LIST;
+struct st_mysql_lex_string;
+typedef struct st_mysql_lex_string LEX_STRING;
+
+/** Name of the table in `wsrep_schema_str` used for storing streaming
+replication data. In an InnoDB full format, e.g. "database/tablename". */
+extern const char* wsrep_sr_table_name_full;
+
+class Wsrep_schema
+{
+ public:
+
+  Wsrep_schema();
+  ~Wsrep_schema();
+
+  /*
+    Initialize wsrep schema. Storage engines must be running before
+    calling this function.
+  */
+  int init();
+
+  /*
+    Store wsrep view info into wsrep schema.
+  */
+  int store_view(THD*, const Wsrep_view& view);
+
+  /*
+    Restore view info from stable storage.
+  */
+  Wsrep_view restore_view(THD* thd, const Wsrep_id& own_id) const;
+
+  /**
+    Append transaction fragment to fragment storage.
+    Transaction must have been started for THD before this call.
+    In order to make changes durable, transaction must be committed
+    separately after this call.
+
+    @param thd THD object
+    @param server_id Wsrep server identifier
+    @param transaction_id Transaction identifier
+    @param flags Flags for the fragment
+    @param data Fragment data buffer
+
+    @return Zero in case of success, non-zero on failure.
+  */
+  int append_fragment(THD* thd,
+                      const wsrep::id& server_id,
+                      wsrep::transaction_id transaction_id,
+                      wsrep::seqno seqno,
+                      int flags,
+                      const wsrep::const_buffer& data);
+  /**
+     Update existing fragment meta data. The fragment must have been
+     inserted before using append_fragment().
+
+     @param thd THD object
+     @param ws_meta Wsrep meta data
+
+     @return Zero in case of success, non-zero on failure.
+   */
+  int update_fragment_meta(THD* thd,
+                           const wsrep::ws_meta& ws_meta);
+
+  /**
+     Remove fragments from storage. This method must be called
+     inside active transaction. Fragment removal will be committed
+     once the transaction commits.
+
+     @param thd Pointer to THD object
+     @param server_id Identifier of the running server
+     @param transaction_id Identifier of the current transaction
+     @param fragments Vector of fragment seqnos to be removed
+  */
+  int remove_fragments(THD*                             thd,
+                       const wsrep::id&                 server_id,
+                       wsrep::transaction_id            transaction_id,
+                       const std::vector<wsrep::seqno>& fragments);
+
+  /**
+     Replay a transaction from stored fragments. The caller must have
+     started a transaction for a thd.
+
+     @param thd Pointer to THD object
+     @param ws_meta Write set meta data for commit fragment.
+     @param fragments Vector of fragments to be replayed
+
+     @return Zero on success, non-zero on failure.
+  */
+  int replay_transaction(THD* thd,
+                         Relay_log_info* rli,
+                         const wsrep::ws_meta& ws_meta,
+                         const std::vector<wsrep::seqno>& fragments);
+
+  /**
+     Recover streaming transactions from SR table.
+     This method should be called after storage enignes are initialized.
+     It will scan SR table and replay found streaming transactions.
+
+     @param orig_thd The THD object of the calling thread.
+
+     @return Zero on success, non-zero on failure.
+  */
+  int recover_sr_transactions(THD* orig_thd);
+
+ private:
+  /* Non-copyable */
+  Wsrep_schema(const Wsrep_schema&);
+  Wsrep_schema& operator=(const Wsrep_schema&);
+};
+
+extern Wsrep_schema* wsrep_schema;
+
+#endif /* !WSREP_SCHEMA_H */