SQLCOM_PREPARE of EXPLAIN & ANALYZE statement do not return correct metadata info

static void test_explain_meta()

{

  MYSQL_STMT *stmt;

  int num_fields;

  char query[MAX_TEST_QUERY_LENGTH];

  MYSQL_FIELD *fields;

  MYSQL_RES *rs_metadata;

  myheader("test_explain_meta");

  mct_start_logging("test_explain_meta");

  strmov(query, "SELECT 1");

  stmt= mysql_simple_prepare(mysql, query);

  check_stmt(stmt);

  rs_metadata= mysql_stmt_result_metadata(stmt);

  num_fields= mysql_stmt_field_count(stmt);

  mct_log("SELECT num_fields: %d\n", (int) num_fields);

  if (num_fields != 1)

  {

    mct_close_log();

    DIE("num_fields != 1");

  }

  mysql_stmt_close(stmt);

  strmov(query, "EXPLAIN SELECT 1");

  stmt= mysql_simple_prepare(mysql, query);

  check_stmt(stmt);

  rs_metadata= mysql_stmt_result_metadata(stmt);

  num_fields= mysql_stmt_field_count(stmt);

  mct_log("EXPALIN num_fields: %d\n", (int) num_fields);

  if (num_fields != 10)

  {

    mct_close_log();

    DIE("num_fields != 10");

  }

  fields= mysql_fetch_fields(rs_metadata);

  for (int i = 0; i < num_fields; ++i)

  {

    mct_log("  - %d: name: '%s'/'%s'; table: '%s'/'%s'; "

        "db: '%s'; catalog: '%s'; length: %d; max_length: %d; "

        "type: %d; decimals: %d\n",

        (int) i,

        (const char *) fields[i].name,

        (const char *) fields[i].org_name,

        (const char *) fields[i].table,

        (const char *) fields[i].org_table,

        (const char *) fields[i].db,

        (const char *) fields[i].catalog,

        (int) fields[i].length,

        (int) fields[i].max_length,

        (int) fields[i].type,

        (int) fields[i].decimals);

  }

  mysql_stmt_close(stmt);

  mct_close_log();

}