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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoLongs.c
// Demos inserting and fetching long columns.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define SQL_TEXT_TRUNC "truncate table DemoLongs"
#define SQL_TEXT_INSERT "insert into DemoLongs values (:1, :2)"
#define SQL_TEXT_QUERY "select * from DemoLongs order by IntCol"
#define ARRAY_SIZE 3
#define NUM_ROWS 10
#define SIZE_INCREMENT 50000
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
uint32_t i, longValueLength, numQueryColumns, bufferRowIndex;
dpiData *intColValue, *longColValue;
dpiVar *intColVar, *longColVar;
char *longValue;
dpiConn *conn;
dpiStmt *stmt;
int found;
// connect to database
conn = dpiSamples_getConn(0, NULL);
// truncate the table so that the demo can be repeated
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_TRUNC, strlen(SQL_TEXT_TRUNC),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, DPI_MODE_EXEC_DEFAULT, &numQueryColumns) < 0)
return dpiSamples_showError();
dpiStmt_release(stmt);
// create variables for insertion
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_NUMBER, DPI_NATIVE_TYPE_INT64,
ARRAY_SIZE, 0, 0, 0, NULL, &intColVar, &intColValue) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_LONG_VARCHAR,
DPI_NATIVE_TYPE_BYTES, ARRAY_SIZE, 0, 0, 0, NULL, &longColVar,
&longColValue) < 0)
return dpiSamples_showError();
// prepare insert statement
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_INSERT, strlen(SQL_TEXT_INSERT),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
// insert the requested number of rows
for (i = 1; i <= NUM_ROWS; i++) {
// perform binds
if (dpiStmt_bindByPos(stmt, 1, intColVar) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 2, longColVar) < 0)
return dpiSamples_showError();
// create long string of specified size
longValueLength = i * SIZE_INCREMENT;
printf("Inserting row %d with long column of length %d\n", i,
longValueLength);
longValue = malloc(longValueLength);
if (!longValue) {
fprintf(stderr, "Out of memory!\n");
return -1;
}
memset(longValue, 'A', longValueLength);
// insert value
intColValue->isNull = 0;
intColValue->value.asInt64 = i;
if (dpiVar_setFromBytes(longColVar, 0, longValue, longValueLength) < 0)
return dpiSamples_showError();
free(longValue);
if (dpiStmt_execute(stmt, DPI_MODE_EXEC_DEFAULT, &numQueryColumns) < 0)
return dpiSamples_showError();
}
dpiStmt_release(stmt);
printf("\n");
// perform commit
if (dpiConn_commit(conn) < 0)
return dpiSamples_showError();
// prepare statement for query
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_QUERY, strlen(SQL_TEXT_QUERY),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_setFetchArraySize(stmt, ARRAY_SIZE) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, DPI_MODE_EXEC_DEFAULT, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_define(stmt, 1, intColVar) < 0)
return dpiSamples_showError();
if (dpiStmt_define(stmt, 2, longColVar) < 0)
return dpiSamples_showError();
// fetch rows
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
printf("Fetched row %" PRId64 " with long column of length %d\n",
intColValue[bufferRowIndex].value.asInt64,
longColValue[bufferRowIndex].value.asBytes.length);
}
// clean up
dpiVar_release(intColVar);
dpiVar_release(longColVar);
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}