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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoConvertNumbers.c
// Demos conversion of numbers to strings and strings to numbers.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define SQL_TEXT "select :1 from dual"
static const char *numbersToConvert[] = {
"0",
"1",
"-1",
"10",
"-10",
"100",
"-100",
"0.1",
"-0.1",
"0.01",
"-0.01",
"0.001",
"-0.001",
".100004",
"-.100004",
"1234567890123456789012345678901234567891",
"-1234567890123456789012345678901234567891",
"1.2345E20",
"-1.2345E+20",
"9e125",
"-9e125",
"9e-130",
"-9e-130",
"9.99999999999999999999999999999999999999E-130",
"-9.99999999999999999999999999999999999999E-130",
NULL
};
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
uint32_t numQueryColumns, bufferRowIndex, ix;
dpiData *inputValue, *outputValue;
dpiVar *inputVar, *outputVar;
const char *inputStringValue;
dpiStmt *stmt;
dpiConn *conn;
int found;
// connect to database
conn = dpiSamples_getConn(1, NULL);
// create variables for the input and output values
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_NUMBER, DPI_NATIVE_TYPE_BYTES,
1, 0, 0, 0, NULL, &inputVar, &inputValue) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_NUMBER, DPI_NATIVE_TYPE_BYTES,
1, 0, 0, 0, NULL, &outputVar, &outputValue) < 0)
return dpiSamples_showError();
// prepare and execute statement for each of the numbers to convert
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT, strlen(SQL_TEXT), NULL, 0,
&stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_setFetchArraySize(stmt, 1) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 1, inputVar) < 0)
return dpiSamples_showError();
// perform query for each string in the array
ix = 0;
while (1) {
inputStringValue = numbersToConvert[ix++];
if (!inputStringValue)
break;
printf(" INPUT: |%s|\n", inputStringValue);
if (dpiVar_setFromBytes(inputVar, 0, inputStringValue,
strlen(inputStringValue)) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_define(stmt, 1, outputVar) < 0)
return dpiSamples_showError();
// fetch rows
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
printf("OUTPUT: |%.*s|\n", outputValue->value.asBytes.length,
outputValue->value.asBytes.ptr);
}
}
// clean up
dpiVar_release(inputVar);
dpiVar_release(outputVar);
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}
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