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//-----------------------------------------------------------------------------
// Copyright (c) 2016, 2022, Oracle and/or its affiliates.
//
// This software is dual-licensed to you under the Universal Permissive License
// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
// either license.
//
// If you elect to accept the software under the Apache License, Version 2.0,
// the following applies:
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoDistribTrans.c
// Demos simple handling of distributed transactions.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define DELETE_TEXT "delete from DemoTempTable"
#define INSERT_TEXT "insert into DemoTempTable values (:1, :2)"
#define FORMAT_ID 100
#define TRANSACTION_ID "123"
#define BRANCH_ID "456"
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiData intColValue, stringColValue;
uint32_t numQueryColumns;
uint64_t rowCount;
int commitNeeded;
dpiStmt *stmt;
dpiConn *conn;
// connect to database
conn = dpiSamples_getConn(0, NULL);
// start distributed transaction
if (dpiConn_beginDistribTrans(conn, FORMAT_ID, TRANSACTION_ID,
strlen(TRANSACTION_ID), BRANCH_ID, strlen(BRANCH_ID)) < 0)
return dpiSamples_showError();
// perform delete
if (dpiConn_prepareStmt(conn, 0, DELETE_TEXT, strlen(DELETE_TEXT), NULL, 0,
&stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_getRowCount(stmt, &rowCount) < 0)
return dpiSamples_showError();
printf("%" PRIu64 " rows deleted.\n", rowCount);
dpiStmt_release(stmt);
// perform insert
if (dpiConn_prepareStmt(conn, 0, INSERT_TEXT, strlen(INSERT_TEXT), NULL, 0,
&stmt) < 0)
return dpiSamples_showError();
intColValue.isNull = 0;
stringColValue.isNull = 0;
intColValue.value.asInt64 = 1;
if (dpiStmt_bindValueByPos(stmt, 1, DPI_NATIVE_TYPE_INT64,
&intColValue) < 0)
return dpiSamples_showError();
stringColValue.value.asBytes.ptr = "DEMO 1";
stringColValue.value.asBytes.length = strlen("DEMO 1");
if (dpiStmt_bindValueByPos(stmt, 2, DPI_NATIVE_TYPE_BYTES,
&stringColValue) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_getRowCount(stmt, &rowCount) < 0)
return dpiSamples_showError();
printf("%" PRIu64 " rows inserted.\n", rowCount);
// prepare transaction for commit
if (dpiConn_prepareDistribTrans(conn, &commitNeeded) < 0)
return dpiSamples_showError();
// commit changes
if (commitNeeded && dpiConn_commit(conn) < 0)
return dpiSamples_showError();
// clean up
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}
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