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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <ndb_global.h>
#include <NdbOut.hpp>
#include <NdbApi.hpp>
#include <NdbSleep.h>
#include <NDBT.hpp>
#include <getarg.h>
static int clear_table(Ndb* pNdb, const NdbDictionary::Table* pTab, int parallelism=240);
int main(int argc, const char** argv){
const char* _tabname = NULL;
const char* _dbname = "TEST_DB";
int _help = 0;
struct getargs args[] = {
{ "usage", '?', arg_flag, &_help, "Print help", "" },
{ "database", 'd', arg_string, &_dbname, "dbname",
"Name of database table is in"}
};
int num_args = sizeof(args) / sizeof(args[0]);
int optind = 0;
char desc[] =
"tabname\n"\
"This program will delete all records in the specified table using scan delete.\n";
if(getarg(args, num_args, argc, argv, &optind) ||
argv[optind] == NULL || _help) {
arg_printusage(args, num_args, argv[0], desc);
return NDBT_ProgramExit(NDBT_WRONGARGS);
}
_tabname = argv[optind];
// Connect to Ndb
Ndb MyNdb(_dbname);
if(MyNdb.init() != 0){
ERR(MyNdb.getNdbError());
return NDBT_ProgramExit(NDBT_FAILED);
}
// Connect to Ndb and wait for it to become ready
while(MyNdb.waitUntilReady() != 0)
ndbout << "Waiting for ndb to become ready..." << endl;
// Check if table exists in db
int res = NDBT_OK;
for(int i = optind; i<argc; i++){
const NdbDictionary::Table * pTab = NDBT_Table::discoverTableFromDb(&MyNdb, argv[i]);
if(pTab == NULL){
ndbout << " Table " << _tabname << " does not exist!" << endl;
return NDBT_ProgramExit(NDBT_WRONGARGS);
}
ndbout << "Deleting all from " << argv[i] << "...";
if(clear_table(&MyNdb, pTab) == NDBT_FAILED){
res = NDBT_FAILED;
ndbout << "FAILED" << endl;
}
}
return NDBT_ProgramExit(res);
}
int clear_table(Ndb* pNdb, const NdbDictionary::Table* pTab, int parallelism)
{
// Scan all records exclusive and delete
// them one by one
int retryAttempt = 0;
const int retryMax = 10;
int deletedRows = 0;
int check;
NdbConnection *pTrans;
NdbScanOperation *pOp;
NdbError err;
int par = parallelism;
while (true){
restart:
if (retryAttempt++ >= retryMax){
g_info << "ERROR: has retried this operation " << retryAttempt
<< " times, failing!" << endl;
return NDBT_FAILED;
}
pTrans = pNdb->startTransaction();
if (pTrans == NULL) {
err = pNdb->getNdbError();
if (err.status == NdbError::TemporaryError){
ERR(err);
NdbSleep_MilliSleep(50);
continue;
}
goto failed;
}
pOp = pTrans->getNdbScanOperation(pTab->getName());
if (pOp == NULL) {
goto failed;
}
NdbResultSet * rs = pOp->readTuplesExclusive(par);
if( rs == 0 ) {
goto failed;
}
if(pTrans->execute(NoCommit) != 0){
err = pTrans->getNdbError();
if(err.status == NdbError::TemporaryError){
ERR(err);
pNdb->closeTransaction(pTrans);
NdbSleep_MilliSleep(50);
continue;
}
goto failed;
}
while((check = rs->nextResult(true)) == 0){
do {
if (rs->deleteTuple() != 0){
goto failed;
}
deletedRows++;
} while((check = rs->nextResult(false)) == 0);
if(check != -1){
check = pTrans->execute(Commit);
pTrans->releaseCompletedOperations();
}
err = pTrans->getNdbError();
if(check == -1){
if(err.status == NdbError::TemporaryError){
ERR(err);
pNdb->closeTransaction(pTrans);
NdbSleep_MilliSleep(50);
par = 1;
goto restart;
}
goto failed;
}
}
if(check == -1){
err = pTrans->getNdbError();
if(err.status == NdbError::TemporaryError){
ERR(err);
pNdb->closeTransaction(pTrans);
NdbSleep_MilliSleep(50);
par = 1;
goto restart;
}
goto failed;
}
pNdb->closeTransaction(pTrans);
return NDBT_OK;
}
return NDBT_FAILED;
failed:
if(pTrans != 0) pNdb->closeTransaction(pTrans);
ERR(err);
return (err.code != 0 ? err.code : NDBT_FAILED);
}
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