MySQL NDB Cluster API 开发人员指南 / 第 2 章 NDB API / 2.5 NDB API 示例 /
2.5.8 NDB API 示例比较 RecAttr 和 NdbRecord
此示例说明了旧式
API 与在 NDB API 应用程序中执行一些常见任务时
NdbRecAttr使用的新方法之间的主要区别。NdbRecord
可以
storage/ndb/ndbapi-examples/ndbapi_recattr_vs_record/main.cpp
在 NDB Cluster 源代码树中的文件中找到源代码。
#include <mysql.h>
#include <NdbApi.hpp>
// Used for cout
#include <stdio.h>
#include <iostream>
// Do we use old-style (NdbRecAttr?) or new style (NdbRecord?)
enum ApiType {api_attr, api_record};
static void run_application(MYSQL &, Ndb_cluster_connection &, ApiType);
#define PRINT_ERROR(code,msg) \
std::cout << "Error in " << __FILE__ \
<< ", line: " << __LINE__ \
<< ", code: " << code \
<< ", msg: " << msg << "." << std::endl
#define MYSQLERROR(mysql) { \
PRINT_ERROR(mysql_errno(&mysql),mysql_error(&mysql)); \
exit(-1); }
#define APIERROR(error) { \
PRINT_ERROR(error.code,error.message); \
exit(-1); }
int main(int argc, char** argv)
{
if (argc != 4)
{
std::cout << "Arguments are <socket mysqld> "
<< "<connect_string cluster> <attr|record>.\n";
exit(-1);
}
// ndb_init must be called first
ndb_init();
// connect to mysql server and cluster and run application
{
char * mysqld_sock = argv[1];
const char *connection_string = argv[2];
ApiType accessType=api_attr;
// Object representing the cluster
Ndb_cluster_connection cluster_connection(connection_string);
// Connect to cluster management server (ndb_mgmd)
if (cluster_connection.connect(4 /* retries */,
5 /* delay between retries */,
1 /* verbose */))
{
std::cout << "Management server not ready within 30 sec.\n";
exit(-1);
}
// Optionally connect and wait for the storage nodes (ndbd's)
if (cluster_connection.wait_until_ready(30,0) < 0)
{
std::cout << "Cluster not ready within 30 sec.\n";
exit(-1);
}
// connect to mysql server
MYSQL mysql;
if ( !mysql_init(&mysql) ) {
std::cout << "mysql_init failed\n";
exit(-1);
}
if ( !mysql_real_connect(&mysql, "localhost", "root", "", "",
0, mysqld_sock, 0) )
MYSQLERROR(mysql);
if (0==strncmp("attr", argv[3], 4))
{
accessType=api_attr;
}
else if (0==strncmp("record", argv[3], 6))
{
accessType=api_record;
}
else
{
std::cout << "Bad access type argument : "
<< argv[3] << "\n";
exit(-1);
}
// run the application code
run_application(mysql, cluster_connection, accessType);
}
ndb_end(0);
return 0;
}
static void init_ndbrecord_info(Ndb &);
static void create_table(MYSQL &);
static void do_insert(Ndb &, ApiType);
static void do_update(Ndb &, ApiType);
static void do_delete(Ndb &, ApiType);
static void do_read(Ndb &, ApiType);
static void do_mixed_read(Ndb &);
static void do_mixed_update(Ndb &);
static void do_scan(Ndb &, ApiType);
static void do_mixed_scan(Ndb &);
static void do_indexScan(Ndb &, ApiType);
static void do_mixed_indexScan(Ndb&);
static void do_read_and_delete(Ndb &);
static void do_scan_update(Ndb&, ApiType);
static void do_scan_delete(Ndb&, ApiType);
static void do_scan_lock_reread(Ndb&, ApiType);
static void do_all_extras_read(Ndb &myNdb);
static void do_secondary_indexScan(Ndb &myNdb, ApiType accessType);
static void do_secondary_indexScanEqual(Ndb &myNdb, ApiType accessType);
static void do_interpreted_update(Ndb &myNdb, ApiType accessType);
static void do_interpreted_scan(Ndb &myNdb, ApiType accessType);
static void do_read_using_default(Ndb &myNdb);
/* This structure is used describe how we want data read using
* NDBRecord to be placed into memory. This can make it easier
* to work with data, but is not essential.
*/
struct RowData
{
int attr1;
int attr2;
int attr3;
};
/* Handy struct for representing the data in the
* secondary index
*/
struct IndexRow
{
unsigned int attr3;
unsigned int attr2;
};
static void run_application(MYSQL &mysql,
Ndb_cluster_connection &cluster_connection,
ApiType accessType)
{
/********************************************
* Connect to database via mysql-c *
********************************************/
mysql_query(&mysql, "CREATE DATABASE ndb_examples");
if (mysql_query(&mysql, "USE ndb_examples") != 0) MYSQLERROR(mysql);
create_table(mysql);
/********************************************
* Connect to database via NDB API *
********************************************/
// Object representing the database
Ndb myNdb( &cluster_connection, "ndb_examples" );
if (myNdb.init()) APIERROR(myNdb.getNdbError());
init_ndbrecord_info(myNdb);
/*
* Do different operations on database
*/
do_insert(myNdb, accessType);
do_update(myNdb, accessType);
do_delete(myNdb, accessType);
do_read(myNdb, accessType);
do_mixed_read(myNdb);
do_mixed_update(myNdb);
do_read(myNdb, accessType);
do_scan(myNdb, accessType);
do_mixed_scan(myNdb);
do_indexScan(myNdb, accessType);
do_mixed_indexScan(myNdb);
do_read_and_delete(myNdb);
do_scan_update(myNdb, accessType);
do_scan_delete(myNdb, accessType);
do_scan_lock_reread(myNdb, accessType);
do_all_extras_read(myNdb);
do_secondary_indexScan(myNdb, accessType);
do_secondary_indexScanEqual(myNdb, accessType);
do_scan(myNdb, accessType);
do_interpreted_update(myNdb, accessType);
do_interpreted_scan(myNdb, accessType);
do_read_using_default(myNdb);
do_scan(myNdb, accessType);
}
/*********************************************************
* Create a table named api_recattr_vs_record if it does not exist *
*********************************************************/
static void create_table(MYSQL &mysql)
{
if (mysql_query(&mysql,
"DROP TABLE IF EXISTS"
" api_recattr_vs_record"))
MYSQLERROR(mysql);
if (mysql_query(&mysql,
"CREATE TABLE"
" api_recattr_vs_record"
" (ATTR1 INT UNSIGNED NOT NULL PRIMARY KEY,"
" ATTR2 INT UNSIGNED NOT NULL,"
" ATTR3 INT UNSIGNED NOT NULL)"
" ENGINE=NDB"))
MYSQLERROR(mysql);
/* Add ordered secondary index on 2 attributes, in reverse order */
if (mysql_query(&mysql,
"CREATE INDEX"
" MYINDEXNAME"
" ON api_recattr_vs_record"
" (ATTR3, ATTR2)"))
MYSQLERROR(mysql);
}
/* Clunky statics for shared NdbRecord stuff */
static const NdbDictionary::Column *pattr1Col;
static const NdbDictionary::Column *pattr2Col;
static const NdbDictionary::Column *pattr3Col;
static const NdbRecord *pkeyColumnRecord;
static const NdbRecord *pallColsRecord;
static const NdbRecord *pkeyIndexRecord;
static const NdbRecord *psecondaryIndexRecord;
static int attr1ColNum;
static int attr2ColNum;
static int attr3ColNum;
/**************************************************************
* Initialise NdbRecord structures for table and index access *
**************************************************************/
static void init_ndbrecord_info(Ndb &myNdb)
{
/* Here we create various NdbRecord structures for accessing
* data using the tables and indexes on api_recattr_vs_record
* We could use the default NdbRecord structures, but then
* we wouldn't have the nice ability to read and write rows
* to and from the RowData and IndexRow structs
*/
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
NdbDictionary::RecordSpecification recordSpec[3];
if (myTable == NULL)
APIERROR(myDict->getNdbError());
pattr1Col = myTable->getColumn("ATTR1");
if (pattr1Col == NULL) APIERROR(myDict->getNdbError());
pattr2Col = myTable->getColumn("ATTR2");
if (pattr2Col == NULL) APIERROR(myDict->getNdbError());
pattr3Col = myTable->getColumn("ATTR3");
if (pattr3Col == NULL) APIERROR(myDict->getNdbError());
attr1ColNum = pattr1Col->getColumnNo();
attr2ColNum = pattr2Col->getColumnNo();
attr3ColNum = pattr3Col->getColumnNo();
// ATTR 1
recordSpec[0].column = pattr1Col;
recordSpec[0].offset = offsetof(RowData, attr1);
recordSpec[0].nullbit_byte_offset = 0; // Not nullable
recordSpec[0].nullbit_bit_in_byte = 0;
// ATTR 2
recordSpec[1].column = pattr2Col;
recordSpec[1].offset = offsetof(RowData, attr2);
recordSpec[1].nullbit_byte_offset = 0; // Not nullable
recordSpec[1].nullbit_bit_in_byte = 0;
// ATTR 3
recordSpec[2].column = pattr3Col;
recordSpec[2].offset = offsetof(RowData, attr3);
recordSpec[2].nullbit_byte_offset = 0; // Not nullable
recordSpec[2].nullbit_bit_in_byte = 0;
/* Create table record with just the primary key column */
pkeyColumnRecord =
myDict->createRecord(myTable, recordSpec, 1, sizeof(recordSpec[0]));
if (pkeyColumnRecord == NULL) APIERROR(myDict->getNdbError());
/* Create table record with all the columns */
pallColsRecord =
myDict->createRecord(myTable, recordSpec, 3, sizeof(recordSpec[0]));
if (pallColsRecord == NULL) APIERROR(myDict->getNdbError());
/* Create NdbRecord for primary index access */
const NdbDictionary::Index *myPIndex=
myDict->getIndex("PRIMARY", "api_recattr_vs_record");
if (myPIndex == NULL)
APIERROR(myDict->getNdbError());
pkeyIndexRecord =
myDict->createRecord(myPIndex, recordSpec, 1, sizeof(recordSpec[0]));
if (pkeyIndexRecord == NULL) APIERROR(myDict->getNdbError());
/* Create Index NdbRecord for secondary index access
* Note that we use the columns from the table to define the index
* access record
*/
const NdbDictionary::Index *mySIndex=
myDict->getIndex("MYINDEXNAME", "api_recattr_vs_record");
recordSpec[0].column= pattr3Col;
recordSpec[0].offset= offsetof(IndexRow, attr3);
recordSpec[0].nullbit_byte_offset=0;
recordSpec[0].nullbit_bit_in_byte=0;
recordSpec[1].column= pattr2Col;
recordSpec[1].offset= offsetof(IndexRow, attr2);
recordSpec[1].nullbit_byte_offset=0;
recordSpec[1].nullbit_bit_in_byte=1;
/* Create NdbRecord for accessing via secondary index */
psecondaryIndexRecord =
myDict->createRecord(mySIndex,
recordSpec,
2,
sizeof(recordSpec[0]));
if (psecondaryIndexRecord == NULL)
APIERROR(myDict->getNdbError());
}
/**************************************************************************
* Using 5 transactions, insert 10 tuples in table: (0,0),(1,1),...,(9,9) *
**************************************************************************/
static void do_insert(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_insert\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
for (int i = 0; i < 5; i++) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
switch (accessType)
{
case api_attr :
{
NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
myOperation->insertTuple();
myOperation->equal("ATTR1", i);
myOperation->setValue("ATTR2", i);
myOperation->setValue("ATTR3", i);
myOperation= myTransaction->getNdbOperation(myTable);
if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
myOperation->insertTuple();
myOperation->equal("ATTR1", i+5);
myOperation->setValue("ATTR2", i+5);
myOperation->setValue("ATTR3", i+5);
break;
}
case api_record :
{
RowData row;
row.attr1= row.attr2= row.attr3= i;
const NdbOperation *pop1=
myTransaction->insertTuple(pallColsRecord, (char *) &row);
if (pop1 == NULL) APIERROR(myTransaction->getNdbError());
row.attr1= row.attr2= row.attr3= i+5;
const NdbOperation *pop2=
myTransaction->insertTuple(pallColsRecord, (char *) &row);
if (pop2 == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if (myTransaction->execute( NdbTransaction::Commit ) == -1)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
}
/*****************************************************************
* Update the second attribute in half of the tuples (adding 10) *
*****************************************************************/
static void do_update(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_update\n";
for (int i = 0; i < 10; i+=2) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
switch (accessType)
{
case api_attr :
{
NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
myOperation->updateTuple();
myOperation->equal( "ATTR1", i );
myOperation->setValue( "ATTR2", i+10);
myOperation->setValue( "ATTR3", i+20);
break;
}
case api_record :
{
RowData row;
row.attr1=i;
row.attr2=i+10;
row.attr3=i+20;
/* Since we're using an NdbRecord with all columns in it to
* specify the updated columns, we need to create a mask to
* indicate that we are only updating attr2 and attr3.
*/
unsigned char attrMask=(1<<attr2ColNum) | (1<<attr3ColNum);
const NdbOperation *pop =
myTransaction->updateTuple(pkeyColumnRecord, (char*) &row,
pallColsRecord, (char*) &row,
&attrMask);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if( myTransaction->execute( NdbTransaction::Commit ) == -1 )
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
};
/*************************************************
* Delete one tuple (the one with primary key 3) *
*************************************************/
static void do_delete(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_delete\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
switch (accessType)
{
case api_attr :
{
NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
myOperation->deleteTuple();
myOperation->equal( "ATTR1", 3 );
break;
}
case api_record :
{
RowData keyInfo;
keyInfo.attr1=3;
const NdbOperation *pop=
myTransaction->deleteTuple(pkeyColumnRecord,
(char*) &keyInfo,
pallColsRecord);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if (myTransaction->execute(NdbTransaction::Commit) == -1)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/*****************************************************************
* Update the second attribute in half of the tuples (adding 10) *
*****************************************************************/
static void do_mixed_update(Ndb &myNdb)
{
/* This method performs an update using a mix of NdbRecord
* supplied attributes, and extra setvalues provided by
* the OperationOptions structure.
*/
std::cout << "Running do_mixed_update (NdbRecord only)\n";
for (int i = 0; i < 10; i+=2) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
RowData row;
row.attr1=i;
row.attr2=i+30;
/* Only attr2 is updated vian NDBRecord */
unsigned char attrMask= (1<<attr2ColNum);
NdbOperation::SetValueSpec setvalspecs[1];
/* Value to set attr3 to */
Uint32 dataSource= i + 40;
setvalspecs[0].column = pattr3Col;
setvalspecs[0].value = &dataSource;
NdbOperation::OperationOptions opts;
opts.optionsPresent= NdbOperation::OperationOptions::OO_SETVALUE;
opts.extraSetValues= &setvalspecs[0];
opts.numExtraSetValues= 1;
// Define mixed operation in one call to NDBAPI
const NdbOperation *pop =
myTransaction->updateTuple(pkeyColumnRecord, (char*) &row,
pallColsRecord, (char*) &row,
&attrMask,
&opts);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
if( myTransaction->execute( NdbTransaction::Commit ) == -1 )
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
}
/*********************************************
* Read and print all tuples using PK access *
*********************************************/
static void do_read(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_read\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
for (int i = 0; i < 10; i++) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
RowData rowData;
NdbRecAttr *myRecAttr;
NdbRecAttr *myRecAttr2;
switch (accessType)
{
case api_attr :
{
NdbOperation *myOperation= myTransaction->getNdbOperation(myTable);
if (myOperation == NULL) APIERROR(myTransaction->getNdbError());
myOperation->readTuple(NdbOperation::LM_Read);
myOperation->equal("ATTR1", i);
myRecAttr= myOperation->getValue("ATTR2", NULL);
if (myRecAttr == NULL) APIERROR(myTransaction->getNdbError());
myRecAttr2=myOperation->getValue("ATTR3", NULL);
if (myRecAttr2 == NULL) APIERROR(myTransaction->getNdbError());
break;
}
case api_record :
{
rowData.attr1=i;
const NdbOperation *pop=
myTransaction->readTuple(pkeyColumnRecord,
(char*) &rowData,
pallColsRecord, // Read PK+ATTR2+ATTR3
(char*) &rowData);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) == -1)
APIERROR(myTransaction->getNdbError());
if (myTransaction->getNdbError().classification == NdbError::NoDataFound)
if (i == 3)
std::cout << "Deleted tuple does not exist." << std::endl;
else
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
if (i != 3) {
printf(" %2d %2d %2d\n",
i,
myRecAttr->u_32_value(),
myRecAttr2->u_32_value());
}
break;
}
case api_record :
{
if (i !=3) {
printf(" %2d %2d %2d\n",
i,
rowData.attr2,
rowData.attr3);
}
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
}
/*****************************
* Read and print all tuples *
*****************************/
static void do_mixed_read(Ndb &myNdb)
{
std::cout << "Running do_mixed_read (NdbRecord only)\n";
std::cout << "ATTR1 ATTR2 ATTR3 COMMIT_COUNT" << std::endl;
for (int i = 0; i < 10; i++) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
RowData rowData;
NdbRecAttr *myRecAttr3, *myRecAttrCC;
/* Start with NdbRecord read of ATTR2, and then add
* getValue NdbRecAttr read of ATTR3 and Commit count
*/
NdbOperation::GetValueSpec extraCols[2];
extraCols[0].column=pattr3Col;
extraCols[0].appStorage=NULL;
extraCols[0].recAttr=NULL;
extraCols[1].column=NdbDictionary::Column::COMMIT_COUNT;
extraCols[1].appStorage=NULL;
extraCols[1].recAttr=NULL;
NdbOperation::OperationOptions opts;
opts.optionsPresent = NdbOperation::OperationOptions::OO_GETVALUE;
opts.extraGetValues= &extraCols[0];
opts.numExtraGetValues= 2;
/* We only read attr2 using the normal NdbRecord access */
unsigned char attrMask= (1<<attr2ColNum);
// Set PK search criteria
rowData.attr1= i;
const NdbOperation *pop=
myTransaction->readTuple(pkeyColumnRecord,
(char*) &rowData,
pallColsRecord, // Read all with mask
(char*) &rowData,
NdbOperation::LM_Read,
&attrMask, // result_mask
&opts);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
myRecAttr3= extraCols[0].recAttr;
myRecAttrCC= extraCols[1].recAttr;
if (myRecAttr3 == NULL) APIERROR(myTransaction->getNdbError());
if (myRecAttrCC == NULL) APIERROR(myTransaction->getNdbError());
if(myTransaction->execute( NdbTransaction::Commit ) == -1)
APIERROR(myTransaction->getNdbError());
if (myTransaction->getNdbError().classification == NdbError::NoDataFound)
if (i == 3)
std::cout << "Deleted tuple does not exist." << std::endl;
else
APIERROR(myTransaction->getNdbError());
if (i !=3) {
printf(" %2d %2d %2d %d\n",
rowData.attr1,
rowData.attr2,
myRecAttr3->u_32_value(),
myRecAttrCC->u_32_value()
);
}
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
}
/********************************************
* Read and print all tuples via table scan *
********************************************/
static void do_scan(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_scan\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbScanOperation(myTable);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
if (psop->readTuples(NdbOperation::LM_Read) != 0)
APIERROR (myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
/* Note that no row ptr is passed to the NdbRecord scan operation
* The scan will fetch a batch and give the user a series of pointers
* to rows in the batch in nextResult() below
*/
psop=myTransaction->scanTable(pallColsRecord,
NdbOperation::LM_Read);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
while (psop->nextResult(true) == 0)
{
printf(" %2d %2d %2d\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value());
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int rc=0;
/* Ask nextResult to update out ptr to point to the next
* row from the scan
*/
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == 0)
{
printf(" %2d %2d %2d\n",
prowData->attr1,
prowData->attr2,
prowData->attr3);
}
if (rc != 1) APIERROR(myTransaction->getNdbError());
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/***********************************************************
* Read and print all tuples via table scan and mixed read *
***********************************************************/
static void do_mixed_scan(Ndb &myNdb)
{
std::cout << "Running do_mixed_scan(NdbRecord only)\n";
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr3;
/* Set mask so that NdbRecord scan reads attr1 and attr2 only */
unsigned char attrMask=((1<<attr1ColNum) | (1<<attr2ColNum));
/* Define extra get value to get attr3 */
NdbOperation::GetValueSpec extraGets[1];
extraGets[0].column = pattr3Col;
extraGets[0].appStorage= 0;
extraGets[0].recAttr= 0;
NdbScanOperation::ScanOptions options;
options.optionsPresent= NdbScanOperation::ScanOptions::SO_GETVALUE;
options.extraGetValues= &extraGets[0];
options.numExtraGetValues= 1;
psop=myTransaction->scanTable(pallColsRecord,
NdbOperation::LM_Read,
&attrMask,
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* RecAttr for the extra get has been set by the operation definition */
recAttrAttr3 = extraGets[0].recAttr;
if (recAttrAttr3 == NULL) APIERROR(myTransaction->getNdbError());
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == 0)
{
printf(" %2d %2d %2d\n",
prowData->attr1,
prowData->attr2,
recAttrAttr3->u_32_value());
}
if (rc != 1) APIERROR(myTransaction->getNdbError());
psop->close(true);
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/************************************************************
* Read and print all tuples via primary ordered index scan *
************************************************************/
static void do_indexScan(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Index *myPIndex=
myDict->getIndex("PRIMARY", "api_recattr_vs_record");
std::cout << "Running do_indexScan\n";
if (myPIndex == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbIndexScanOperation *psop;
/* RecAttrs for NdbRecAttr Api */
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbIndexScanOperation(myPIndex);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Multi read range is not supported for the NdbRecAttr scan
* API, so we just read one range.
*/
Uint32 scanFlags=
NdbScanOperation::SF_OrderBy |
NdbScanOperation::SF_MultiRange |
NdbScanOperation::SF_ReadRangeNo;
if (psop->readTuples(NdbOperation::LM_Read,
scanFlags,
(Uint32) 0, // batch
(Uint32) 0) != 0) // parallel
APIERROR (myTransaction->getNdbError());
/* Add a bound
* Tuples where ATTR1 >=2 and < 4
* 2,[3 deleted]
*/
Uint32 low=2;
Uint32 high=4;
if (psop->setBound("ATTR1",
NdbIndexScanOperation::BoundLE, (char*)&low))
APIERROR(myTransaction->getNdbError());
if (psop->setBound("ATTR1",
NdbIndexScanOperation::BoundGT, (char*)&high))
APIERROR(myTransaction->getNdbError());
if (psop->end_of_bound(0))
APIERROR(psop->getNdbError());
/* Second bound
* Tuples where ATTR1 > 5 and <=9
* 6,7,8,9
*/
low=5;
high=9;
if (psop->setBound("ATTR1",
NdbIndexScanOperation::BoundLT, (char*)&low))
APIERROR(myTransaction->getNdbError());
if (psop->setBound("ATTR1",
NdbIndexScanOperation::BoundGE, (char*)&high))
APIERROR(myTransaction->getNdbError());
if (psop->end_of_bound(1))
APIERROR(psop->getNdbError());
/* Read all columns */
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
/* NdbRecord supports scanning multiple ranges using a
* single index scan operation
*/
Uint32 scanFlags =
NdbScanOperation::SF_OrderBy |
NdbScanOperation::SF_MultiRange |
NdbScanOperation::SF_ReadRangeNo;
NdbScanOperation::ScanOptions options;
options.optionsPresent=NdbScanOperation::ScanOptions::SO_SCANFLAGS;
options.scan_flags=scanFlags;
psop=myTransaction->scanIndex(pkeyIndexRecord,
pallColsRecord,
NdbOperation::LM_Read,
NULL, // no mask; read all columns
// in result record
NULL, // bound defined later
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Add a bound
* Tuples where ATTR1 >=2 and < 4
* 2,[3 deleted]
*/
Uint32 low=2;
Uint32 high=4;
NdbIndexScanOperation::IndexBound bound;
bound.low_key=(char*)&low;
bound.low_key_count=1;
bound.low_inclusive=true;
bound.high_key=(char*)&high;
bound.high_key_count=1;
bound.high_inclusive=false;
bound.range_no=0;
if (psop->setBound(pkeyIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
/* Second bound
* Tuples where ATTR1 > 5 and <=9
* 6,7,8,9
*/
low=5;
high=9;
bound.low_key=(char*)&low;
bound.low_key_count=1;
bound.low_inclusive=false;
bound.high_key=(char*)&high;
bound.high_key_count=1;
bound.high_inclusive=true;
bound.range_no=1;
if (psop->setBound(pkeyIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
if (myTransaction->getNdbError().code != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
while (psop->nextResult(true) == 0)
{
printf(" %2d %2d %2d Range no : %2d\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value(),
psop->get_range_no());
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == 0)
{
// printf(" PTR : %d\n", (int) prowData);
printf(" %2d %2d %2d Range no : %2d\n",
prowData->attr1,
prowData->attr2,
prowData->attr3,
psop->get_range_no());
}
if (rc != 1) APIERROR(myTransaction->getNdbError());
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/*************************************************************************
* Read and print all tuples via index scan using mixed NdbRecord access *
*************************************************************************/
static void do_mixed_indexScan(Ndb &myNdb)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Index *myPIndex=
myDict->getIndex("PRIMARY", "api_recattr_vs_record");
std::cout << "Running do_mixed_indexScan\n";
if (myPIndex == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbIndexScanOperation *psop;
NdbRecAttr *recAttrAttr3;
Uint32 scanFlags =
NdbScanOperation::SF_OrderBy |
NdbScanOperation::SF_MultiRange |
NdbScanOperation::SF_ReadRangeNo;
/* We'll get Attr3 via ScanOptions */
unsigned char attrMask=((1<<attr1ColNum) | (1<<attr2ColNum));
NdbOperation::GetValueSpec extraGets[1];
extraGets[0].column= pattr3Col;
extraGets[0].appStorage= NULL;
extraGets[0].recAttr= NULL;
NdbScanOperation::ScanOptions options;
options.optionsPresent=
NdbScanOperation::ScanOptions::SO_SCANFLAGS |
NdbScanOperation::ScanOptions::SO_GETVALUE;
options.scan_flags= scanFlags;
options.extraGetValues= &extraGets[0];
options.numExtraGetValues= 1;
psop=myTransaction->scanIndex(pkeyIndexRecord,
pallColsRecord,
NdbOperation::LM_Read,
&attrMask, // mask
NULL, // bound defined below
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Grab RecAttr now */
recAttrAttr3= extraGets[0].recAttr;
/* Add a bound
* ATTR1 >= 2, < 4
* 2,[3 deleted]
*/
Uint32 low=2;
Uint32 high=4;
NdbIndexScanOperation::IndexBound bound;
bound.low_key=(char*)&low;
bound.low_key_count=1;
bound.low_inclusive=true;
bound.high_key=(char*)&high;
bound.high_key_count=1;
bound.high_inclusive=false;
bound.range_no=0;
if (psop->setBound(pkeyIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
/* Second bound
* ATTR1 > 5, <= 9
* 6,7,8,9
*/
low=5;
high=9;
bound.low_key=(char*)&low;
bound.low_key_count=1;
bound.low_inclusive=false;
bound.high_key=(char*)&high;
bound.high_key_count=1;
bound.high_inclusive=true;
bound.range_no=1;
if (psop->setBound(pkeyIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == 0)
{
printf(" %2d %2d %2d Range no : %2d\n",
prowData->attr1,
prowData->attr2,
recAttrAttr3->u_32_value(),
psop->get_range_no());
}
if (rc != 1) APIERROR(myTransaction->getNdbError());
psop->close(true);
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/********************************************************
* Read + Delete one tuple (the one with primary key 8) *
********************************************************/
static void do_read_and_delete(Ndb &myNdb)
{
/* This procedure performs a single operation, single round
* trip read and then delete of a tuple, specified by
* primary key
*/
std::cout << "Running do_read_and_delete (NdbRecord only)\n";
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
RowData row;
row.attr1=8;
row.attr2=0; // Don't care
row.attr3=0; // Don't care
/* We'll also read some extra columns while we're
* reading + deleting
*/
NdbOperation::OperationOptions options;
NdbOperation::GetValueSpec extraGets[2];
extraGets[0].column = pattr3Col;
extraGets[0].appStorage = NULL;
extraGets[0].recAttr = NULL;
extraGets[1].column = NdbDictionary::Column::COMMIT_COUNT;
extraGets[1].appStorage = NULL;
extraGets[1].recAttr = NULL;
options.optionsPresent= NdbOperation::OperationOptions::OO_GETVALUE;
options.extraGetValues= &extraGets[0];
options.numExtraGetValues= 2;
unsigned char attrMask = (1<<attr2ColNum); // Only read Col2 into row
const NdbOperation *pop=
myTransaction->deleteTuple(pkeyColumnRecord, // Spec of key used
(char*) &row, // Key information
pallColsRecord, // Spec of columns to read
(char*) &row, // Row to read values into
&attrMask, // Cols to read as part of delete
&options,
sizeof(NdbOperation::OperationOptions));
if (pop==NULL) APIERROR(myTransaction->getNdbError());
if (myTransaction->execute(NdbTransaction::Commit) == -1)
APIERROR(myTransaction->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3 COMMITS" << std::endl;
printf(" %2d %2d %2d %2d\n",
row.attr1,
row.attr2,
extraGets[0].recAttr->u_32_value(),
extraGets[1].recAttr->u_32_value());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/* Some handy consts for scan control */
static const int GOT_ROW= 0;
static const int NO_MORE_ROWS= 1;
static const int NEED_TO_FETCH_ROWS= 2;
/*********************************************
* Read and update all tuples via table scan *
*********************************************/
static void do_scan_update(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "Running do_scan_update\n";
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbScanOperation(myTable);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* When we want to operate on the tuples returned from a
* scan, we need to request the tuple's keyinfo is
* returned, with SF_KeyInfo
*/
if (psop->readTuples(NdbOperation::LM_Read,
NdbScanOperation::SF_KeyInfo) != 0)
APIERROR (myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions options;
options.optionsPresent= NdbScanOperation::ScanOptions::SO_SCANFLAGS;
options.scan_flags= NdbScanOperation::SF_KeyInfo;
psop=myTransaction->scanTable(pallColsRecord,
NdbOperation::LM_Read,
NULL, // mask - read all columns
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
int result= NEED_TO_FETCH_ROWS;
Uint32 processed= 0;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch=true;
while ((result = psop->nextResult(fetch)) == GOT_ROW)
{
fetch= false;
Uint32 col2Value=recAttrAttr2->u_32_value();
NdbOperation *op=psop->updateCurrentTuple();
if (op==NULL)
APIERROR(myTransaction->getNdbError());
op->setValue("ATTR2", (10*col2Value));
processed++;
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
// Need to execute
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
}
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int result= NEED_TO_FETCH_ROWS;
Uint32 processed=0;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch= true;
while ((result = psop->nextResult((const char**) &prowData,
fetch, false)) == GOT_ROW)
{
fetch= false;
/* Copy row into a stack variable */
RowData r= *prowData;
/* Modify attr2 */
r.attr2*= 10;
/* Update it */
const NdbOperation *op = psop->updateCurrentTuple(myTransaction,
pallColsRecord,
(char*) &r);
if (op==NULL)
APIERROR(myTransaction->getNdbError());
processed ++;
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
/* To get here, there are no more cached scan results,
* and some row updates that we've not sent yet.
* Send them before we try to get another batch, or
* finish.
*/
if (myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
}
}
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/**************************************************
* Read all and delete some tuples via table scan *
**************************************************/
static void do_scan_delete(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "Running do_scan_delete\n";
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr1;
/* Scan, retrieving first column.
* Delete particular records, based on first column
* Read third column as part of delete
*/
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbScanOperation(myTable);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Need KeyInfo when performing scanning delete */
if (psop->readTuples(NdbOperation::LM_Read,
NdbScanOperation::SF_KeyInfo) != 0)
APIERROR (myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions options;
options.optionsPresent=NdbScanOperation::ScanOptions::SO_SCANFLAGS;
/* Need KeyInfo when performing scanning delete */
options.scan_flags=NdbScanOperation::SF_KeyInfo;
psop=myTransaction->scanTable(pkeyColumnRecord,
NdbOperation::LM_Read,
NULL, // mask
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
int result= NEED_TO_FETCH_ROWS;
Uint32 processed=0;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch=true;
while ((result = psop->nextResult(fetch)) == GOT_ROW)
{
fetch= false;
Uint32 col1Value=recAttrAttr1->u_32_value();
if (col1Value == 2)
{
/* Note : We cannot do a delete pre-read via
* the NdbRecAttr interface. We can only
* delete here.
*/
if (psop->deleteCurrentTuple())
APIERROR(myTransaction->getNdbError());
processed++;
}
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
/* To get here, there are no more cached scan results,
* and some row deletes that we've not sent yet.
* Send them before we try to get another batch, or
* finish.
*/
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
}
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int result= NEED_TO_FETCH_ROWS;
Uint32 processed=0;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch=true;
const NdbOperation* theDeleteOp;
RowData readRow;
NdbRecAttr* attr3;
NdbRecAttr* commitCount;
while ((result = psop->nextResult((const char**) &prowData,
fetch,
false)) == GOT_ROW)
{
fetch = false;
/* Copy latest row to a stack local */
RowData r;
r= *prowData;
if (r.attr1 == 2)
{
/* We're going to perform a read+delete on this
* row. We'll read attr1 and attr2 vian NDBRecord
* and Attr3 and the commit count via extra
* get values.
*/
NdbOperation::OperationOptions options;
NdbOperation::GetValueSpec extraGets[2];
extraGets[0].column = pattr3Col;
extraGets[0].appStorage = NULL;
extraGets[0].recAttr = NULL;
extraGets[1].column = NdbDictionary::Column::COMMIT_COUNT;
extraGets[1].appStorage = NULL;
extraGets[1].recAttr = NULL;
options.optionsPresent= NdbOperation::OperationOptions::OO_GETVALUE;
options.extraGetValues= &extraGets[0];
options.numExtraGetValues= 2;
// Read cols 1 + 2 vian NDBRecord
unsigned char attrMask =
(1<<attr1ColNum) | (1<<attr2ColNum);
theDeleteOp =
psop->deleteCurrentTuple(myTransaction,
pallColsRecord,
(char*) &readRow,
&attrMask,
&options,
sizeof(NdbOperation::OperationOptions)
);
if (theDeleteOp==NULL)
APIERROR(myTransaction->getNdbError());
/* Store extra Get RecAttrs */
attr3= extraGets[0].recAttr;
commitCount= extraGets[1].recAttr;
processed ++;
}
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
/* To get here, there are no more cached scan results,
* and some row deletes that we've not sent yet.
* Send them before we try to get another batch, or
* finish.
*/
if (myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
// Let's look at the data just read
printf("Deleted data\n");
printf("ATTR1 ATTR2 ATTR3 COMMITS\n");
printf(" %2d %2d %2d %2d\n",
readRow.attr1,
readRow.attr2,
attr3->u_32_value(),
commitCount->u_32_value());
}
}
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/***********************************************************
* Read all tuples via scan, reread one with lock takeover *
***********************************************************/
static void do_scan_lock_reread(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "Running do_scan_lock_reread\n";
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr1;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbScanOperation(myTable);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Need KeyInfo for lock takeover */
if (psop->readTuples(NdbOperation::LM_Read,
NdbScanOperation::SF_KeyInfo) != 0)
APIERROR (myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions options;
options.optionsPresent= NdbScanOperation::ScanOptions::SO_SCANFLAGS;
/* Need KeyInfo for lock takeover */
options.scan_flags= NdbScanOperation::SF_KeyInfo;
psop=myTransaction->scanTable(pkeyColumnRecord,
NdbOperation::LM_Read,
NULL, // mask
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
int result= NEED_TO_FETCH_ROWS;
Uint32 processed=0;
NdbRecAttr *attr1, *attr2, *attr3, *commitCount;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch=true;
while ((result = psop->nextResult(fetch)) == GOT_ROW)
{
fetch= false;
Uint32 col1Value=recAttrAttr1->u_32_value();
if (col1Value == 9)
{
/* Let's read the rest of the info for it with
* a separate operation
*/
NdbOperation *op= psop->lockCurrentTuple();
if (op==NULL)
APIERROR(myTransaction->getNdbError());
attr1=op->getValue("ATTR1");
attr2=op->getValue("ATTR2");
attr3=op->getValue("ATTR3");
commitCount=op->getValue(NdbDictionary::Column::COMMIT_COUNT);
processed++;
}
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
// Need to execute
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
// Let's look at the whole row...
printf("Locked and re-read data:\n");
printf("ATTR1 ATTR2 ATTR3 COMMITS\n");
printf(" %2d %2d %2d %2d\n",
attr1->u_32_value(),
attr2->u_32_value(),
attr3->u_32_value(),
commitCount->u_32_value());
}
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int result= NEED_TO_FETCH_ROWS;
Uint32 processed=0;
RowData rereadData;
NdbRecAttr *attr3, *commitCount;
while (result == NEED_TO_FETCH_ROWS)
{
bool fetch=true;
while ((result = psop->nextResult((const char**) &prowData,
fetch,
false)) == GOT_ROW)
{
fetch = false;
/* Copy row to stack local */
RowData r;
r=*prowData;
if (r.attr1 == 9)
{
/* Perform extra read of this row via lockCurrentTuple
* Read all columns using NdbRecord for attr1 + attr2,
* and extra get values for attr3 and the commit count
*/
NdbOperation::OperationOptions options;
NdbOperation::GetValueSpec extraGets[2];
extraGets[0].column = pattr3Col;
extraGets[0].appStorage = NULL;
extraGets[0].recAttr = NULL;
extraGets[1].column = NdbDictionary::Column::COMMIT_COUNT;
extraGets[1].appStorage = NULL;
extraGets[1].recAttr = NULL;
options.optionsPresent=NdbOperation::OperationOptions::OO_GETVALUE;
options.extraGetValues=&extraGets[0];
options.numExtraGetValues=2;
// Read cols 1 + 2 vian NDBRecord
unsigned char attrMask =
(1<<attr1ColNum) | (1<<attr2ColNum);
const NdbOperation *lockOp =
psop->lockCurrentTuple(myTransaction,
pallColsRecord,
(char *) &rereadData,
&attrMask,
&options,
sizeof(NdbOperation::OperationOptions)
);
if (lockOp == NULL)
APIERROR(myTransaction->getNdbError());
attr3= extraGets[0].recAttr;
commitCount= extraGets[1].recAttr;
processed++;
}
}
if (result < 0)
APIERROR(myTransaction->getNdbError());
if (processed !=0)
{
// Need to execute
if (myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
processed=0;
// Let's look at the whole row...
printf("Locked and re-read data:\n");
printf("ATTR1 ATTR2 ATTR3 COMMITS\n");
printf(" %2d %2d %2d %2d\n",
rereadData.attr1,
rereadData.attr2,
attr3->u_32_value(),
commitCount->u_32_value());
}
}
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/***************************************************************
* Read all tuples via primary key, using only extra getValues *
***************************************************************/
static void do_all_extras_read(Ndb &myNdb)
{
std::cout << "Running do_all_extras_read(NdbRecord only)\n";
std::cout << "ATTR1 ATTR2 ATTR3 COMMIT_COUNT" << std::endl;
for (int i = 0; i < 10; i++) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
RowData rowData;
NdbRecAttr *myRecAttr1, *myRecAttr2, *myRecAttr3, *myRecAttrCC;
/* We read nothing vian NDBRecord, and everything via
* 'extra' reads
*/
NdbOperation::GetValueSpec extraCols[4];
extraCols[0].column=pattr1Col;
extraCols[0].appStorage=NULL;
extraCols[0].recAttr=NULL;
extraCols[1].column=pattr2Col;
extraCols[1].appStorage=NULL;
extraCols[1].recAttr=NULL;
extraCols[2].column=pattr3Col;
extraCols[2].appStorage=NULL;
extraCols[2].recAttr=NULL;
extraCols[3].column=NdbDictionary::Column::COMMIT_COUNT;
extraCols[3].appStorage=NULL;
extraCols[3].recAttr=NULL;
NdbOperation::OperationOptions opts;
opts.optionsPresent = NdbOperation::OperationOptions::OO_GETVALUE;
opts.extraGetValues=&extraCols[0];
opts.numExtraGetValues=4;
unsigned char attrMask= 0; // No row results required.
// Set PK search criteria
rowData.attr1= i;
const NdbOperation *pop=
myTransaction->readTuple(pkeyColumnRecord,
(char*) &rowData,
pkeyColumnRecord,
NULL, // null result row
NdbOperation::LM_Read,
&attrMask,
&opts);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
myRecAttr1=extraCols[0].recAttr;
myRecAttr2=extraCols[1].recAttr;
myRecAttr3=extraCols[2].recAttr;
myRecAttrCC=extraCols[3].recAttr;
if (myRecAttr1 == NULL) APIERROR(myTransaction->getNdbError());
if (myRecAttr2 == NULL) APIERROR(myTransaction->getNdbError());
if (myRecAttr3 == NULL) APIERROR(myTransaction->getNdbError());
if (myRecAttrCC == NULL) APIERROR(myTransaction->getNdbError());
if(myTransaction->execute( NdbTransaction::Commit ) == -1)
APIERROR(myTransaction->getNdbError());
bool deleted= (myTransaction->getNdbError().classification ==
NdbError::NoDataFound);
if (deleted)
printf("Detected that deleted tuple %d doesn't exist!\n", i);
else
{
printf(" %2d %2d %2d %d\n",
myRecAttr1->u_32_value(),
myRecAttr2->u_32_value(),
myRecAttr3->u_32_value(),
myRecAttrCC->u_32_value()
);
}
myNdb.closeTransaction(myTransaction);
}
std::cout << "-------\n";
}
/******************************************************************
* Read and print some tuples via bounded scan of secondary index *
******************************************************************/
static void do_secondary_indexScan(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Index *mySIndex=
myDict->getIndex("MYINDEXNAME", "api_recattr_vs_record");
std::cout << "Running do_secondary_indexScan\n";
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbIndexScanOperation *psop;
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
Uint32 scanFlags =
NdbScanOperation::SF_OrderBy |
NdbScanOperation::SF_Descending |
NdbScanOperation::SF_MultiRange |
NdbScanOperation::SF_ReadRangeNo;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbIndexScanOperation(mySIndex);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
if (psop->readTuples(NdbOperation::LM_Read,
scanFlags,
(Uint32) 0, // batch
(Uint32) 0) != 0) // parallel
APIERROR (myTransaction->getNdbError());
/* Bounds :
* > ATTR3=6
* < ATTR3=42
*/
Uint32 low=6;
Uint32 high=42;
if (psop->setBound("ATTR3",
NdbIndexScanOperation::BoundLT, (char*)&low))
APIERROR(psop->getNdbError());
if (psop->setBound("ATTR3",
NdbIndexScanOperation::BoundGT, (char*)&high))
APIERROR(psop->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions options;
options.optionsPresent=NdbScanOperation::ScanOptions::SO_SCANFLAGS;
options.scan_flags=scanFlags;
psop=myTransaction->scanIndex(psecondaryIndexRecord,
pallColsRecord,
NdbOperation::LM_Read,
NULL, // mask
NULL, // bound
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Bounds :
* > ATTR3=6
* < ATTR3=42
*/
Uint32 low=6;
Uint32 high=42;
NdbIndexScanOperation::IndexBound bound;
bound.low_key=(char*)&low;
bound.low_key_count=1;
bound.low_inclusive=false;
bound.high_key=(char*)&high;
bound.high_key_count=1;
bound.high_inclusive=false;
bound.range_no=0;
if (psop->setBound(psecondaryIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
// Check rc anyway
if (myTransaction->getNdbError().status != NdbError::Success)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
while (psop->nextResult(true) == 0)
{
printf(" %2d %2d %2d Range no : %2d\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value(),
psop->get_range_no());
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == 0)
{
// printf(" PTR : %d\n", (int) prowData);
printf(" %2d %2d %2d Range no : %2d\n",
prowData->attr1,
prowData->attr2,
prowData->attr3,
psop->get_range_no());
}
if (rc != 1) APIERROR(myTransaction->getNdbError());
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/***********************************************************************
* Index scan to read tuples from secondary index using equality bound *
***********************************************************************/
static void do_secondary_indexScanEqual(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Index *mySIndex=
myDict->getIndex("MYINDEXNAME", "api_recattr_vs_record");
std::cout << "Running do_secondary_indexScanEqual\n";
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbIndexScanOperation *psop;
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
Uint32 scanFlags = NdbScanOperation::SF_OrderBy;
Uint32 attr3Eq= 44;
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbIndexScanOperation(mySIndex);
if (psop == NULL) APIERROR(myTransaction->getNdbError());
if (psop->readTuples(NdbOperation::LM_Read,
scanFlags,
(Uint32) 0, // batch
(Uint32) 0) != 0) // parallel
APIERROR (myTransaction->getNdbError());
if (psop->setBound("ATTR3",
NdbIndexScanOperation::BoundEQ, (char*)&attr3Eq))
APIERROR(myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions options;
options.optionsPresent= NdbScanOperation::ScanOptions::SO_SCANFLAGS;
options.scan_flags=scanFlags;
psop=myTransaction->scanIndex(psecondaryIndexRecord,
pallColsRecord, // Read all table rows back
NdbOperation::LM_Read,
NULL, // mask
NULL, // bound specified below
&options,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
/* Set equality bound via two inclusive bounds */
NdbIndexScanOperation::IndexBound bound;
bound.low_key= (char*)&attr3Eq;
bound.low_key_count= 1;
bound.low_inclusive= true;
bound.high_key= (char*)&attr3Eq;
bound.high_key_count= 1;
bound.high_inclusive= true;
bound.range_no= 0;
if (psop->setBound(psecondaryIndexRecord, bound))
APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
// Check rc anyway
if (myTransaction->getNdbError().status != NdbError::Success)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
int res;
while ((res= psop->nextResult(true)) == GOT_ROW)
{
printf(" %2d %2d %2d\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value());
}
if (res != NO_MORE_ROWS)
APIERROR(psop->getNdbError());
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true, // fetch
false)) // forceSend
== GOT_ROW)
{
printf(" %2d %2d %2d\n",
prowData->attr1,
prowData->attr2,
prowData->attr3);
}
if (rc != NO_MORE_ROWS)
APIERROR(myTransaction->getNdbError());
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/**********************
* Interpreted update *
**********************/
static void do_interpreted_update(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
const NdbDictionary::Index *myPIndex=
myDict->getIndex("PRIMARY", "api_recattr_vs_record");
std::cout << "Running do_interpreted_update\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
if (myPIndex == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
NdbRecAttr *recAttrAttr11;
NdbRecAttr *recAttrAttr12;
NdbRecAttr *recAttrAttr13;
RowData rowData;
RowData rowData2;
/* Register aliases */
const Uint32 R1=1, R2=2, R3=3, R4=4, R5=5, R6=6;
switch (accessType)
{
case api_attr :
{
NdbOperation *pop;
pop=myTransaction->getNdbOperation(myTable);
if (pop == NULL) APIERROR(myTransaction->getNdbError());
if (pop->interpretedUpdateTuple())
APIERROR (pop->getNdbError());
/* Interpreted update on row where ATTR1 == 4 */
if (pop->equal("ATTR1", 4) != 0)
APIERROR (pop->getNdbError());
/* First, read the values of all attributes in the normal way */
recAttrAttr1=pop->getValue("ATTR1");
recAttrAttr2=pop->getValue("ATTR2");
recAttrAttr3=pop->getValue("ATTR3");
/* Now define interpreted program which will run after the
* values have been read
* This program is rather tortuous and doesn't achieve much other
* than demonstrating control flow, register and some column
* operations
*/
// R5= 3
if (pop->load_const_u32(R5, 3) != 0)
APIERROR (pop->getNdbError());
// R1= *ATTR1; R2= *ATTR2; R3= *ATTR3
if (pop->read_attr("ATTR1", R1) != 0)
APIERROR (pop->getNdbError());
if (pop->read_attr("ATTR2", R2) != 0)
APIERROR (pop->getNdbError());
if (pop->read_attr("ATTR3", R3) != 0)
APIERROR (pop->getNdbError());
// R3= R3-R5
if (pop->sub_reg(R3, R5, R3) != 0)
APIERROR (pop->getNdbError());
// R2= R1+R2
if (pop->add_reg(R1, R2, R2) != 0)
APIERROR (pop->getNdbError());
// *ATTR2= R2
if (pop->write_attr("ATTR2", R2) != 0)
APIERROR (pop->getNdbError());
// *ATTR3= R3
if (pop->write_attr("ATTR3", R3) != 0)
APIERROR (pop->getNdbError());
// *ATTR3 = *ATTR3 - 30
if (pop->subValue("ATTR3", (Uint32)30) != 0)
APIERROR (pop->getNdbError());
Uint32 comparisonValue= 10;
// if *ATTR3 > comparisonValue, goto Label 0
if (pop->branch_col_lt(pattr3Col->getColumnNo(),
&comparisonValue,
sizeof(Uint32),
false,
0) != 0)
APIERROR (pop->getNdbError());
// assert(false)
// Fail the operation with error 627 if we get here.
if (pop->interpret_exit_nok(627) != 0)
APIERROR (pop->getNdbError());
// Label 0
if (pop->def_label(0) != 0)
APIERROR (pop->getNdbError());
Uint32 comparisonValue2= 344;
// if *ATTR2 == comparisonValue, goto Label 1
if (pop->branch_col_eq(pattr2Col->getColumnNo(),
&comparisonValue2,
sizeof(Uint32),
false,
1) != 0)
APIERROR (pop->getNdbError());
// assert(false)
// Fail the operation with error 628 if we get here
if (pop->interpret_exit_nok(628) != 0)
APIERROR (pop->getNdbError());
// Label 1
if (pop->def_label(1) != 1)
APIERROR (pop->getNdbError());
// Optional infinite loop
//if (pop->branch_label(0) != 0)
// APIERROR (pop->getNdbError());
// R1 = 10
if (pop->load_const_u32(R1, 10) != 0)
APIERROR (pop->getNdbError());
// R3 = 2
if (pop->load_const_u32(R3, 2) != 0)
APIERROR (pop->getNdbError());
// Now call subroutine 0
if (pop->call_sub(0) != 0)
APIERROR (pop->getNdbError());
// *ATTR2= R2
if (pop->write_attr("ATTR2", R2) != 0)
APIERROR (pop->getNdbError());
// Return ok, we'll move onto an update.
if (pop->interpret_exit_ok() != 0)
APIERROR (pop->getNdbError());
/* Define a final read of the columns after the update */
recAttrAttr11= pop->getValue("ATTR1");
recAttrAttr12= pop->getValue("ATTR2");
recAttrAttr13= pop->getValue("ATTR3");
// Define any subroutines called by the 'main' program
// Subroutine 0
if (pop->def_subroutine(0) != 0)
APIERROR (pop->getNdbError());
// R4= 1
if (pop->load_const_u32(R4, 1) != 0)
APIERROR (pop->getNdbError());
// Label 2
if (pop->def_label(2) != 2)
APIERROR (pop->getNdbError());
// R3= R3-R4
if (pop->sub_reg(R3, R4, R3) != 0)
APIERROR (pop->getNdbError());
// R2= R2 + R1
if (pop->add_reg(R2, R1, R2) != 0)
APIERROR (pop->getNdbError());
// Optional infinite loop
// if (pop->branch_label(2) != 0)
// APIERROR (pop->getNdbError());
// Loop, subtracting 1 from R4 until R4 < 1
if (pop->branch_ge(R4, R3, 2) != 0)
APIERROR (pop->getNdbError());
// Jump to label 3
if (pop->branch_label(3) != 0)
APIERROR (pop->getNdbError());
// assert(false)
// Fail operation with error 629
if (pop->interpret_exit_nok(629) != 0)
APIERROR (pop->getNdbError());
// Label 3
if (pop->def_label(3) != 3)
APIERROR (pop->getNdbError());
// Nested subroutine call to sub 2
if (pop->call_sub(2) != 0)
APIERROR (pop->getNdbError());
// Return from subroutine 0
if (pop->ret_sub() !=0)
APIERROR (pop->getNdbError());
// Subroutine 1
if (pop->def_subroutine(1) != 1)
APIERROR (pop->getNdbError());
// R6= R1+R2
if (pop->add_reg(R1, R2, R6) != 0)
APIERROR (pop->getNdbError());
// Return from subrouine 1
if (pop->ret_sub() !=0)
APIERROR (pop->getNdbError());
// Subroutine 2
if (pop->def_subroutine(2) != 2)
APIERROR (pop->getNdbError());
// Call backward to subroutine 1
if (pop->call_sub(1) != 0)
APIERROR (pop->getNdbError());
// Return from subroutine 2
if (pop->ret_sub() !=0)
APIERROR (pop->getNdbError());
break;
}
case api_record :
{
const NdbOperation *pop;
rowData.attr1= 4;
/* NdbRecord does not support an updateTuple pre-read or post-read, so
* we use separate operations for these.
* Note that this assumes that a operations are executed in
* the order they are defined by NDBAPI, which is not guaranteed. To
* ensure execution order, the application should perform a NoCommit
* execute between operations.
*/
const NdbOperation *op0= myTransaction->readTuple(pkeyColumnRecord,
(char*) &rowData,
pallColsRecord,
(char*) &rowData);
if (op0 == NULL)
APIERROR (myTransaction->getNdbError());
/* Allocate some space to define an Interpreted program */
const Uint32 numWords= 64;
Uint32 space[numWords];
NdbInterpretedCode stackCode(myTable,
&space[0],
numWords);
NdbInterpretedCode *code= &stackCode;
/* Similar program as above, with tortuous control flow and little
* purpose. Note that for NdbInterpretedCode, some instruction
* arguments are in different orders
*/
// R5= 3
if (code->load_const_u32(R5, 3) != 0)
APIERROR(code->getNdbError());
// R1= *ATTR1; R2= *ATTR2; R3= *ATTR3
if (code->read_attr(R1, pattr1Col) != 0)
APIERROR (code->getNdbError());
if (code->read_attr(R2, pattr2Col) != 0)
APIERROR (code->getNdbError());
if (code->read_attr(R3, pattr3Col) != 0)
APIERROR (code->getNdbError());
// R3= R3-R5
if (code->sub_reg(R3, R3, R5) != 0)
APIERROR (code->getNdbError());
// R2= R1+R2
if (code->add_reg(R2, R1, R2) != 0)
APIERROR (code->getNdbError());
// *ATTR2= R2
if (code->write_attr(pattr2Col, R2) != 0)
APIERROR (code->getNdbError());
// *ATTR3= R3
if (code->write_attr(pattr3Col, R3) != 0)
APIERROR (code->getNdbError());
// *ATTR3 = *ATTR3 - 30
if (code->sub_val(pattr3Col->getColumnNo(), (Uint32)30) != 0)
APIERROR (code->getNdbError());
Uint32 comparisonValue= 10;
// if comparisonValue < *ATTR3, goto Label 0
if (code->branch_col_lt(&comparisonValue,
sizeof(Uint32),
pattr3Col->getColumnNo(),
0) != 0)
APIERROR (code->getNdbError());
// assert(false)
// Fail operation with error 627
if (code->interpret_exit_nok(627) != 0)
APIERROR (code->getNdbError());
// Label 0
if (code->def_label(0) != 0)
APIERROR (code->getNdbError());
Uint32 comparisonValue2= 344;
// if *ATTR2 == comparisonValue, goto Label 1
if (code->branch_col_eq(&comparisonValue2,
sizeof(Uint32),
pattr2Col->getColumnNo(),
1) != 0)
APIERROR (code->getNdbError());
// assert(false)
// Fail operation with error 628
if (code->interpret_exit_nok(628) != 0)
APIERROR (code->getNdbError());
// Label 1
if (code->def_label(1) != 0)
APIERROR (code->getNdbError());
// R1= 10
if (code->load_const_u32(R1, 10) != 0)
APIERROR (code->getNdbError());
// R3= 2
if (code->load_const_u32(R3, 2) != 0)
APIERROR (code->getNdbError());
// Call subroutine 0 to effect
// R2 = R2 + (R1*R3)
if (code->call_sub(0) != 0)
APIERROR (code->getNdbError());
// *ATTR2= R2
if (code->write_attr(pattr2Col, R2) != 0)
APIERROR (code->getNdbError());
// Return ok
if (code->interpret_exit_ok() != 0)
APIERROR (code->getNdbError());
// Subroutine 0
if (code->def_sub(0) != 0)
APIERROR (code->getNdbError());
// R4= 1
if (code->load_const_u32(R4, 1) != 0)
APIERROR (code->getNdbError());
// Label 2
if (code->def_label(2) != 0)
APIERROR (code->getNdbError());
// R3= R3-R4
if (code->sub_reg(R3, R3, R4) != 0)
APIERROR (code->getNdbError());
// R2= R2+R1
if (code->add_reg(R2, R2, R1) != 0)
APIERROR (code->getNdbError());
// Loop, subtracting 1 from R4 until R4>1
if (code->branch_ge(R3, R4, 2) != 0)
APIERROR (code->getNdbError());
// Jump to label 3
if (code->branch_label(3) != 0)
APIERROR (code->getNdbError());
// Fail operation with error 629
if (code->interpret_exit_nok(629) != 0)
APIERROR (code->getNdbError());
// Label 3
if (code->def_label(3) != 0)
APIERROR (code->getNdbError());
// Call sub 2
if (code->call_sub(2) != 0)
APIERROR (code->getNdbError());
// Return from sub 0
if (code->ret_sub() != 0)
APIERROR (code->getNdbError());
// Subroutine 1
if (code->def_sub(1) != 0)
APIERROR (code->getNdbError());
// R6= R1+R2
if (code->add_reg(R6, R1, R2) != 0)
APIERROR (code->getNdbError());
// Return from subroutine 1
if (code->ret_sub() !=0)
APIERROR (code->getNdbError());
// Subroutine 2
if (code->def_sub(2) != 0)
APIERROR (code->getNdbError());
// Call backward to subroutine 1
if (code->call_sub(1) != 0)
APIERROR (code->getNdbError());
// Return from subroutine 2
if (code->ret_sub() !=0)
APIERROR (code->getNdbError());
/* Finalise code object
* This step is essential for NdbInterpretedCode objects
* and must be done before they can be used.
*/
if (code->finalise() !=0)
APIERROR (code->getNdbError());
/* Time to define the update operation to use the
* InterpretedCode object. The same finalised object
* could be used with multiple operations or even
* multiple threads
*/
NdbOperation::OperationOptions oo;
oo.optionsPresent=
NdbOperation::OperationOptions::OO_INTERPRETED;
oo.interpretedCode= code;
unsigned char mask= 0;
pop= myTransaction->updateTuple(pkeyColumnRecord,
(char*) &rowData,
pallColsRecord,
(char*) &rowData,
(const unsigned char *) &mask,
// mask - update nothing
&oo,
sizeof(NdbOperation::OperationOptions));
if (pop == NULL)
APIERROR (myTransaction->getNdbError());
// NoCommit execute so we can read the 'after' data.
if (myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
/* Second read op as we can't currently do a 'read after
* 'interpreted code' read as part of NdbRecord.
* We are assuming that the order of op definition == order
* of execution on a single row, which is not guaranteed.
*/
const NdbOperation *pop2=
myTransaction->readTuple(pkeyColumnRecord,
(char*) &rowData,
pallColsRecord,
(char*) &rowData2);
if (pop2 == NULL)
APIERROR (myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
// Check return code
if (myTransaction->getNdbError().status != NdbError::Success)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
printf(" %2d %2d %2d Before\n"
" %2d %2d %2d After\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value(),
recAttrAttr11->u_32_value(),
recAttrAttr12->u_32_value(),
recAttrAttr13->u_32_value());
break;
}
case api_record :
{
printf(" %2d %2d %2d Before\n"
" %2d %2d %2d After\n",
rowData.attr1,
rowData.attr2,
rowData.attr3,
rowData2.attr1,
rowData2.attr2,
rowData2.attr3);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/******************************************************
* Read and print selected rows with interpreted code *
******************************************************/
static void do_interpreted_scan(Ndb &myNdb, ApiType accessType)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
std::cout << "Running do_interpreted_scan\n";
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
NdbTransaction *myTransaction=myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
NdbScanOperation *psop;
NdbRecAttr *recAttrAttr1;
NdbRecAttr *recAttrAttr2;
NdbRecAttr *recAttrAttr3;
/* Create some space on the stack for the program */
const Uint32 numWords= 64;
Uint32 space[numWords];
NdbInterpretedCode stackCode(myTable,
&space[0],
numWords);
NdbInterpretedCode *code= &stackCode;
/* RecAttr and NdbRecord scans both use NdbInterpretedCode
* Let's define a small scan filter of sorts
*/
Uint32 comparisonValue= 10;
// Return rows where 10 > ATTR3 (ATTR3 <10)
if (code->branch_col_gt(&comparisonValue,
sizeof(Uint32),
pattr3Col->getColumnNo(),
0) != 0)
APIERROR (myTransaction->getNdbError());
/* If we get here then we don't return this row */
if (code->interpret_exit_nok() != 0)
APIERROR (myTransaction->getNdbError());
/* Label 0 */
if (code->def_label(0) != 0)
APIERROR (myTransaction->getNdbError());
/* Return this row */
if (code->interpret_exit_ok() != 0)
APIERROR (myTransaction->getNdbError());
/* Finalise the Interpreted Program */
if (code->finalise() != 0)
APIERROR (myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
psop=myTransaction->getNdbScanOperation(myTable);
if (psop == NULL)
APIERROR(myTransaction->getNdbError());
if (psop->readTuples(NdbOperation::LM_Read) != 0)
APIERROR (myTransaction->getNdbError());
if (psop->setInterpretedCode(code) != 0)
APIERROR (myTransaction->getNdbError());
recAttrAttr1=psop->getValue("ATTR1");
recAttrAttr2=psop->getValue("ATTR2");
recAttrAttr3=psop->getValue("ATTR3");
break;
}
case api_record :
{
NdbScanOperation::ScanOptions so;
so.optionsPresent = NdbScanOperation::ScanOptions::SO_INTERPRETED;
so.interpretedCode= code;
psop=myTransaction->scanTable(pallColsRecord,
NdbOperation::LM_Read,
NULL, // mask
&so,
sizeof(NdbScanOperation::ScanOptions));
if (psop == NULL) APIERROR(myTransaction->getNdbError());
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::NoCommit ) != 0)
APIERROR(myTransaction->getNdbError());
switch (accessType)
{
case api_attr :
{
while (psop->nextResult(true) == 0)
{
printf(" %2d %2d %2d\n",
recAttrAttr1->u_32_value(),
recAttrAttr2->u_32_value(),
recAttrAttr3->u_32_value());
}
psop->close();
break;
}
case api_record :
{
RowData *prowData; // Ptr to point to our data
int rc=0;
while ((rc = psop->nextResult((const char**) &prowData,
true,
false)) == GOT_ROW)
{
printf(" %2d %2d %2d\n",
prowData->attr1,
prowData->attr2,
prowData->attr3);
}
if (rc != NO_MORE_ROWS) APIERROR(myTransaction->getNdbError());
psop->close(true);
break;
}
default :
{
std::cout << "Bad branch : " << accessType << "\n";
exit(-1);
}
}
if(myTransaction->execute( NdbTransaction::Commit ) !=0)
APIERROR(myTransaction->getNdbError());
myNdb.closeTransaction(myTransaction);
std::cout << "-------\n";
}
/******************************************************
* Read some data using the default NdbRecord objects *
******************************************************/
static void do_read_using_default(Ndb &myNdb)
{
NdbDictionary::Dictionary* myDict= myNdb.getDictionary();
const NdbDictionary::Table *myTable=
myDict->getTable("api_recattr_vs_record");
const NdbRecord* tableRec= myTable->getDefaultRecord();
if (myTable == NULL)
APIERROR(myDict->getNdbError());
std::cout << "Running do_read_using_default_record (NdbRecord only)\n";
std::cout << "ATTR1 ATTR2 ATTR3" << std::endl;
/* Allocate some space for the rows to be read into */
char* buffer= (char*)malloc(NdbDictionary::getRecordRowLength(tableRec));
if (buffer== NULL)
{
printf("Allocation failed\n");
exit(-1);
}
for (int i = 0; i < 10; i++) {
NdbTransaction *myTransaction= myNdb.startTransaction();
if (myTransaction == NULL) APIERROR(myNdb.getNdbError());
char* attr1= NdbDictionary::getValuePtr(tableRec,
buffer,
attr1ColNum);
*((unsigned int*)attr1)= i;
const NdbOperation *pop=
myTransaction->readTuple(tableRec,
buffer,
tableRec, // Read everything
buffer);
if (pop==NULL) APIERROR(myTransaction->getNdbError());
if(myTransaction->execute( NdbTransaction::Commit ) == -1)
APIERROR(myTransaction->getNdbError());
NdbError err= myTransaction->getNdbError();
if (err.code != 0)
{
if (err.classification == NdbError::NoDataFound)
std::cout << "Tuple " << i
<< " does not exist." << std::endl;
else
APIERROR(myTransaction->getNdbError());
}
else
{
printf(" %2d %2d %2d\n",
i,
*((unsigned int*) NdbDictionary::getValuePtr(tableRec,
buffer,
attr2ColNum)),
*((unsigned int*) NdbDictionary::getValuePtr(tableRec,
buffer,
attr3ColNum)));
}
myNdb.closeTransaction(myTransaction);
}
free(buffer);
std::cout << "-------\n";
}