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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; version 2 of the License.
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 <ndb_opts.h>
#include <NdbOut.hpp>
#include <NdbApi.hpp>
#include <NdbSleep.h>
#include <NDBT.hpp>
static int clear_table(Ndb* pNdb, const NdbDictionary::Table* pTab,
bool fetch_across_commit, int parallelism=240);
NDB_STD_OPTS_VARS;
const char *load_default_groups[]= { "mysql_cluster",0 };
static const char* _dbname = "TEST_DB";
static my_bool _transactional = false;
static struct my_option my_long_options[] =
{
NDB_STD_OPTS("ndb_desc"),
{ "database", 'd', "Name of database table is in",
(gptr*) &_dbname, (gptr*) &_dbname, 0,
GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
{ "transactional", 't', "Single transaction (may run out of operations)",
(gptr*) &_transactional, (gptr*) &_transactional, 0,
GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};
static void usage()
{
char desc[] =
"tabname\n"\
"This program will delete all records in the specified table using scan delete.\n";
ndb_std_print_version();
print_defaults(MYSQL_CONFIG_NAME,load_default_groups);
puts("");
my_print_help(my_long_options);
my_print_variables(my_long_options);
}
int main(int argc, char** argv){
NDB_INIT(argv[0]);
load_defaults("my",load_default_groups,&argc,&argv);
int ho_error;
#ifndef DBUG_OFF
opt_debug= "d:t:O,/tmp/ndb_delete_all.trace";
#endif
if ((ho_error=handle_options(&argc, &argv, my_long_options,
ndb_std_get_one_option)))
return NDBT_ProgramExit(NDBT_WRONGARGS);
Ndb_cluster_connection con(opt_connect_str);
if(con.connect(12, 5, 1) != 0)
{
ndbout << "Unable to connect to management server." << endl;
return NDBT_ProgramExit(NDBT_FAILED);
}
if (con.wait_until_ready(30,0) < 0)
{
ndbout << "Cluster nodes not ready in 30 seconds." << endl;
return NDBT_ProgramExit(NDBT_FAILED);
}
Ndb MyNdb(&con, _dbname );
if(MyNdb.init() != 0){
ERR(MyNdb.getNdbError());
return NDBT_ProgramExit(NDBT_FAILED);
}
// Check if table exists in db
int res = NDBT_OK;
for(int i = 0; i<argc; i++){
const NdbDictionary::Table * pTab = NDBT_Table::discoverTableFromDb(&MyNdb, argv[i]);
if(pTab == NULL){
ndbout << " Table " << argv[i] << " does not exist!" << endl;
return NDBT_ProgramExit(NDBT_WRONGARGS);
}
ndbout << "Deleting all from " << argv[i];
if (! _transactional)
ndbout << " (non-transactional)";
ndbout << " ...";
if(clear_table(&MyNdb, pTab, ! _transactional) == NDBT_FAILED){
res = NDBT_FAILED;
ndbout << "FAILED" << endl;
}
}
return NDBT_ProgramExit(res);
}
int clear_table(Ndb* pNdb, const NdbDictionary::Table* pTab,
bool fetch_across_commit, int parallelism)
{
// Scan all records exclusive and delete
// them one by one
int retryAttempt = 0;
const int retryMax = 10;
int deletedRows = 0;
int check;
NdbTransaction *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;
}
if( pOp->readTuples(NdbOperation::LM_Exclusive,par) ) {
goto failed;
}
if(pTrans->execute(NdbTransaction::NoCommit) != 0){
err = pTrans->getNdbError();
if(err.status == NdbError::TemporaryError){
ERR(err);
pNdb->closeTransaction(pTrans);
NdbSleep_MilliSleep(50);
continue;
}
goto failed;
}
while((check = pOp->nextResult(true)) == 0){
do {
if (pOp->deleteCurrentTuple() != 0){
goto failed;
}
deletedRows++;
} while((check = pOp->nextResult(false)) == 0);
if(check != -1){
if (fetch_across_commit) {
check = pTrans->execute(NdbTransaction::Commit);
pTrans->restart(); // new tx id
} else {
check = pTrans->execute(NdbTransaction::NoCommit);
}
}
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;
}
if (! fetch_across_commit &&
pTrans->execute(NdbTransaction::Commit) != 0) {
err = pTrans->getNdbError();
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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