add KEYDB_METADATA_ID to metadata tables when created

Former-commit-id: 7fe8a184db62eab171935c20498bdb4f30ee6b1d

src/IStorage.h

@@ -2,6 +2,8 @@
 #include <functional>
 #include "sds.h"
 
+#define METADATA_DB_IDENTIFIER "c299fde0-6d42-4ec4-b939-34f680ffe39f"
+
 class IStorageFactory
 {
 public:

src/storage/rocksdbfactory.cpp

@@ -137,7 +137,9 @@ std::string RocksDBStorageFactory::getTempFolder()
 
 IStorage *RocksDBStorageFactory::createMetadataDb()
 {
-    return this->create(-1, nullptr, nullptr);
+    IStorage *metadataDb = this->create(-1, nullptr, nullptr);
+    metadataDb->insert("KEYDB_METADATA_ID", strlen("KEYDB_METADATA_ID"), (void*)METADATA_DB_IDENTIFIER, strlen(METADATA_DB_IDENTIFIER), false);
+    return metadataDb;
 }
 
 IStorage *RocksDBStorageFactory::create(int db, key_load_iterator iter, void *privdata)

src/storage/teststorageprovider.cpp

@@ -8,7 +8,9 @@ IStorage *TestStorageFactory::create(int, key_load_iterator, void *)
 
 IStorage *TestStorageFactory::createMetadataDb()
 {
-    return new (MALLOC_LOCAL) TestStorageProvider();
+    IStorage *metadataDb = new (MALLOC_LOCAL) TestStorageProvider();
+    metadataDb->insert("KEYDB_METADATA_ID", strlen("KEYDB_METADATA_ID"), (void*)METADATA_DB_IDENTIFIER, strlen(METADATA_DB_IDENTIFIER), false);
+    return metadataDb;
 }
 
 const char *TestStorageFactory::name() const