oracle 0.6.3

Oracle binding
Documentation 
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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.
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// DemoCallProc.c
//   Demos simple call of stored procedure with in, in/out and out variables.
//-----------------------------------------------------------------------------

#include "SampleLib.h"
#define SQL_TEXT        "begin proc_Demo(:1, :2, :3); end;"

//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
    dpiData *inOutValue, *outValue, inValue;
    dpiVar *inOutVar, *outVar;
    uint32_t numQueryColumns;
    dpiStmt *stmt;
    dpiConn *conn;

    // connect to database and create statement
    conn = dpiSamples_getConn(0, NULL);
    if (dpiConn_prepareStmt(conn, 0, SQL_TEXT, strlen(SQL_TEXT), NULL, 0,
            &stmt) < 0)
        return dpiSamples_showError();

    // bind IN value
    inValue.isNull = 0;
    inValue.value.asBytes.ptr = "In value for demoing";
    inValue.value.asBytes.length = strlen("In value for demoing");
    if (dpiStmt_bindValueByPos(stmt, 1, DPI_NATIVE_TYPE_BYTES, &inValue) < 0)
        return dpiSamples_showError();

    // bind IN/OUT variable
    if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_NUMBER, DPI_NATIVE_TYPE_INT64, 1,
            0, 0, 0, NULL, &inOutVar, &inOutValue) < 0)
        return dpiSamples_showError();
    inOutValue->isNull = 0;
    inOutValue->value.asInt64 = 347;
    if (dpiStmt_bindByPos(stmt, 2, inOutVar) < 0)
        return dpiSamples_showError();

    // bind OUT variable
    if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_NUMBER, DPI_NATIVE_TYPE_INT64, 1,
            0, 0, 0, NULL, &outVar, &outValue) < 0)
        return dpiSamples_showError();
    if (dpiStmt_bindByPos(stmt, 3, outVar) < 0)
        return dpiSamples_showError();

    // perform execution
    if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
        return dpiSamples_showError();

    // display value of IN/OUT variable
    printf("IN/OUT value (after call) is %" PRId64 "\n",
            inOutValue->value.asInt64);
    dpiVar_release(inOutVar);

    // display value of OUT variable
    printf("OUT value (after call) is %" PRId64 "\n", outValue->value.asInt64);
    dpiVar_release(outVar);

    // clean up
    dpiStmt_release(stmt);
    dpiConn_release(conn);

    printf("Done.\n");
    return 0;
}