delete_all.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:5k
- /* 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 <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, int parallelism=240);
- NDB_STD_OPTS_VARS;
- static const char* _dbname = "TEST_DB";
- 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 },
- { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
- };
- static void usage()
- {
- char desc[] =
- "tabnamen"
- "This program will delete all records in the specified table using scan delete.n";
- ndb_std_print_version();
- my_print_help(my_long_options);
- my_print_variables(my_long_options);
- }
- static my_bool
- get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
- char *argument)
- {
- return ndb_std_get_one_option(optid, opt, argument ? argument :
- "d:t:O,/tmp/ndb_delete_all.trace");
- }
- int main(int argc, char** argv){
- NDB_INIT(argv[0]);
- const char *load_default_groups[]= { "mysql_cluster",0 };
- load_defaults("my",load_default_groups,&argc,&argv);
- int ho_error;
- if ((ho_error=handle_options(&argc, &argv, my_long_options, get_one_option)))
- return NDBT_ProgramExit(NDBT_WRONGARGS);
- Ndb::setConnectString(opt_connect_str);
- // 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 = 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(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->restart();
- }
-
- 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);
- }