MDEV-18204 Fix rocksdb incremental backup

Fix incremental prepare to copy #rocksdb subdirectory from the
incremental dir.

3 files changed, 58 insertions, 0 deletions

diff --git a/mysql-test/suite/mariabackup/incremental_rocksdb.opt b/mysql-test/suite/mariabackup/incremental_rocksdb.opt
new file mode 100644
index 00000000000..e582413e5b5
--- /dev/null
+++ b/mysql-test/suite/mariabackup/incremental_rocksdb.opt
@@ -0,0 +1 @@
+--plugin-load=$HA_ROCKSDB_SO 
\ No newline at end of file
diff --git a/mysql-test/suite/mariabackup/incremental_rocksdb.result b/mysql-test/suite/mariabackup/incremental_rocksdb.result
new file mode 100644
index 00000000000..4e5b9c43389
--- /dev/null
+++ b/mysql-test/suite/mariabackup/incremental_rocksdb.result
@@ -0,0 +1,19 @@
+call mtr.add_suppression("InnoDB: New log files created");
+CREATE TABLE t(i INT PRIMARY KEY) ENGINE ROCKSDB;
+INSERT INTO t VALUES(1);
+# Create full backup , modify table, then create incremental/differential backup
+DROP TABLE t;
+CREATE TABLE t2(i INT PRIMARY KEY) ENGINE ROCKSDB;
+INSERT INTO t2 VALUES(2);
+# Prepare full backup, apply incremental one
+# Restore and check results
+# shutdown server
+# remove datadir
+# xtrabackup move back
+# restart server
+SELECT * FROM t2;
+i
+2
+DROP TABLE t2;
+DROP TABLE t;
+ERROR 42S02: Unknown table 'test.t'
diff --git a/mysql-test/suite/mariabackup/incremental_rocksdb.test b/mysql-test/suite/mariabackup/incremental_rocksdb.test
new file mode 100644
index 00000000000..32bce885c32
--- /dev/null
+++ b/mysql-test/suite/mariabackup/incremental_rocksdb.test
@@ -0,0 +1,38 @@
+--source include/have_rocksdb.inc
+call mtr.add_suppression("InnoDB: New log files created");
+
+let $basedir=$MYSQLTEST_VARDIR/tmp/backup;
+let $incremental_dir=$MYSQLTEST_VARDIR/tmp/backup_inc1;
+
+CREATE TABLE t(i INT PRIMARY KEY) ENGINE ROCKSDB;
+INSERT INTO t VALUES(1);
+
+echo # Create full backup , modify table, then create incremental/differential backup;
+--disable_result_log
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf  --backup --target-dir=$basedir;
+--enable_result_log
+DROP TABLE t;
+CREATE TABLE t2(i INT PRIMARY KEY) ENGINE ROCKSDB;
+INSERT INTO t2 VALUES(2);
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf  --backup --target-dir=$incremental_dir --incremental-basedir=$basedir;
+
+--disable_result_log
+echo # Prepare full backup, apply incremental one;
+exec $XTRABACKUP --prepare --target-dir=$basedir;
+
+exec $XTRABACKUP --prepare --target-dir=$basedir --incremental-dir=$incremental_dir ;
+
+echo # Restore and check results;
+let $targetdir=$basedir;
+-- source include/restart_and_restore.inc
+--enable_result_log
+
+SELECT * FROM t2;
+DROP TABLE t2;
+--error ER_BAD_TABLE_ERROR
+DROP TABLE t;
+
+# Cleanup
+rmdir $basedir;
+rmdir $incremental_dir;
+