add a new mgmapi ndb_mgm_get_db_parameter_info, which retrieve parameter's name

storage/ndb/include/mgmapi/mgmapi.h

@@ -1133,6 +1133,14 @@ extern "C" {
   int ndb_mgm_check_connection(NdbMgmHandle handle);
 
   int ndb_mgm_report_event(NdbMgmHandle handle, Uint32 *data, Uint32 length);
+
+  struct ndb_mgm_param_info
+  {
+    Uint32 m_id;
+    const char * m_name;
+  };
+  int ndb_mgm_get_db_parameter_info(Uint32 paramId, struct ndb_mgm_param_info * info, 
+             size_t * size);
 #endif
 
 #ifndef DOXYGEN_SHOULD_SKIP_DEPRECATED

storage/ndb/src/mgmapi/Makefile.am

@@ -1,7 +1,7 @@
 
 noinst_LTLIBRARIES = libmgmapi.la
 
-libmgmapi_la_SOURCES = mgmapi.cpp ndb_logevent.cpp mgmapi_configuration.cpp LocalConfig.cpp ../kernel/error/ndbd_exit_codes.c
+libmgmapi_la_SOURCES = mgmapi.cpp ndb_logevent.cpp mgmapi_configuration.cpp LocalConfig.cpp ../kernel/error/ndbd_exit_codes.c ../mgmsrv/ParamInfo.cpp
 
 INCLUDES_LOC = -I$(top_srcdir)/storage/ndb/include/mgmapi
 

storage/ndb/src/mgmapi/mgmapi_configuration.cpp

@@ -1,6 +1,10 @@
 #include <ndb_types.h>
 #include <mgmapi.h>
 #include "mgmapi_configuration.hpp"
+#include "../mgmsrv/ParamInfo.hpp"
+
+extern const ParamInfo ParamInfoArray[];
+extern const int ParamInfoNum;
 
 ndb_mgm_configuration_iterator::ndb_mgm_configuration_iterator
 (const ndb_mgm_configuration & conf, unsigned type_of_section)
@@ -155,3 +159,37 @@ ndb_mgm_find(ndb_mgm_configuration_iterator* iter,
 	     int param, unsigned search){
   return iter->find(param, search);
 }
+
+/**
+ * Retrieve information about parameter
+ * @param info : in - pointer to structure allocated by caller
+ * @param size : in/out : pointer to int initialized to sizeof(ndb_mgm_param_info)...will be set to bytes set by function on return
+*/
+extern "C"
+int 
+ndb_mgm_get_db_parameter_info(Uint32 paramId, struct ndb_mgm_param_info * info, size_t * size) {
+  if ( paramId == 0 ) {
+      return -1;
+  }
+
+  for (int i = 0; i < ParamInfoNum; i++) {
+    if (paramId == ParamInfoArray[i]._paramId && strcmp(DB_TOKEN, ParamInfoArray[i]._section) == 0) {
+        size_t tmp = 0;
+        if (tmp + sizeof(info->m_id) <= *size)
+        {
+          info->m_id = ParamInfoArray[i]._paramId;
+          tmp += sizeof(info->m_id);
+        }
+
+        if (tmp + sizeof(info->m_name) <= *size)
+        {
+          info->m_name = ParamInfoArray[i]._fname;
+          tmp += sizeof(info->m_name);
+        }
+
+        *size = tmp;
+        return 0;
+    }
+  }
+  return -1;
+}

storage/ndb/src/mgmsrv/ParamInfo.hpp

@@ -0,0 +1,44 @@
+#ifndef PARAMINFO_H
+#define PARAMINFO_H
+
+#define DB_TOKEN "DB"
+#define MGM_TOKEN "MGM"
+#define API_TOKEN "API"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * The Configuration parameter type and status
+ */
+
+enum ParameterType        { CI_BOOL, CI_INT, CI_INT64, CI_STRING, CI_SECTION };
+enum ParameterStatus      { CI_USED,            ///< Active
+		     CI_DEPRICATED,      ///< Can be, but shouldn't
+		     CI_NOTIMPLEMENTED,  ///< Is ignored.
+		     CI_INTERNAL         ///< Not configurable by the user
+};
+
+/**
+ *   Entry for one configuration parameter
+ */
+typedef struct m_ParamInfo {
+  Uint32         _paramId;
+  const char*    _fname;   
+  const char*    _section;
+  const char*    _description;
+  ParameterStatus         _status;
+  bool           _updateable;    
+  ParameterType           _type;          
+  const char*    _default;
+  const char*    _min;
+  const char*    _max;
+}ParamInfo;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif