本文整理汇总了C++中ndbdictionary::Dictionary::alterTable方法的典型用法代码示例。如果您正苦于以下问题：C++ Dictionary::alterTable方法的具体用法？C++ Dictionary::alterTable怎么用？C++ Dictionary::alterTable使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ndbdictionary::Dictionary的用法示例。
在下文中一共展示了Dictionary::alterTable方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: main
int main(int argc, const char** argv){
ndb_init();
int _help = 0;
int _p = 0;
const char * db = "TEST_DB";
const char* _connectstr = NULL;
struct getargs args[] = {
{ "database", 'd', arg_string, &db, "database", 0 },
{ "connstr", 'c', arg_string, &_connectstr, "Connect string", "cs" },
{ "partitions", 'p', arg_integer, &_p, "New no of partitions", 0},
{ "usage", '?', arg_flag, &_help, "Print help", "" }
};
int num_args = sizeof(args) / sizeof(args[0]);
int optind = 0;
char desc[] =
"tabname\n" \
"This program will alter no of partitions of table in Ndb.\n";
if(getarg(args, num_args, argc, argv, &optind) || _help){
arg_printusage(args, num_args, argv[0], desc);
return NDBT_ProgramExit(NDBT_WRONGARGS);
}
if(argv[optind] == NULL)
{
arg_printusage(args, num_args, argv[0], desc);
return NDBT_ProgramExit(NDBT_WRONGARGS);
}
// Connect to Ndb
Ndb_cluster_connection con(_connectstr);
if(con.connect(12, 5, 1) != 0)
{
return NDBT_ProgramExit(NDBT_FAILED);
}
Ndb MyNdb(&con, db );
if(MyNdb.init() != 0){
ERR(MyNdb.getNdbError());
return NDBT_ProgramExit(NDBT_FAILED);
}
while(MyNdb.waitUntilReady() != 0)
ndbout << "Waiting for ndb to become ready..." << endl;
NdbDictionary::Dictionary* MyDic = MyNdb.getDictionary();
for (int i = optind; i<argc; i++)
{
printf("altering %s/%s...", db, argv[i]);
const NdbDictionary::Table* oldTable = MyDic->getTable(argv[i]);
if (oldTable == 0)
{
ndbout << "Failed to retrieve table " << argv[i]
<< ": " << MyDic->getNdbError() << endl;
return NDBT_ProgramExit(NDBT_FAILED);
}
NdbDictionary::Table newTable = *oldTable;
newTable.setFragmentCount(_p);
if (MyDic->beginSchemaTrans() != 0)
goto err;
if (MyDic->prepareHashMap(*oldTable, newTable) != 0)
goto err;
if (MyDic->alterTable(*oldTable, newTable) != 0)
goto err;
if (MyDic->endSchemaTrans())
goto err;
ndbout_c("done");
}
return NDBT_ProgramExit(NDBT_OK);
err:
NdbError err = MyDic->getNdbError();
if (MyDic->hasSchemaTrans())
MyDic->endSchemaTrans(NdbDictionary::Dictionary::SchemaTransAbort);
ndbout << "Failed! "
<< err << endl;
return NDBT_ProgramExit(NDBT_FAILED);
}