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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoRefCursors.c
// Demos simple fetch of REF cursors.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define SQL_TEXT "begin " \
" open :1 for select 'X' StrVal from dual; " \
"end;"
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
uint32_t numQueryColumns, bufferRowIndex, i;
dpiData *refCursorValue, *strValue;
dpiNativeTypeNum nativeTypeNum;
dpiQueryInfo queryInfo;
dpiVar *refCursorVar;
dpiStmt *stmt;
dpiConn *conn;
int found;
// connect to database
conn = dpiSamples_getConn(1, NULL);
// prepare and execute statement
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT, strlen(SQL_TEXT), NULL, 0,
&stmt) < 0)
return dpiSamples_showError();
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_STMT, DPI_NATIVE_TYPE_STMT, 1, 0,
0, 0, NULL, &refCursorVar, &refCursorValue) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 1, refCursorVar) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
// get ref cursor
dpiStmt_release(stmt);
stmt = refCursorValue->value.asStmt;
// fetch data from ref cursor
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
if (dpiStmt_getQueryValue(stmt, 1, &nativeTypeNum, &strValue) < 0)
return dpiSamples_showError();
printf("Row: StrVal = '%.*s'\n", strValue->value.asBytes.length,
strValue->value.asBytes.ptr);
}
// display description of each fetched column
if (dpiStmt_getNumQueryColumns(stmt, &numQueryColumns) < 0)
return dpiSamples_showError();
for (i = 0; i < numQueryColumns; i++) {
if (dpiStmt_getQueryInfo(stmt, i + 1, &queryInfo) < 0)
return dpiSamples_showError();
printf("('%*s', %d, %d, %d, %d, %d, %d)\n", queryInfo.nameLength,
queryInfo.name, queryInfo.typeInfo.oracleTypeNum,
queryInfo.typeInfo.sizeInChars,
queryInfo.typeInfo.clientSizeInBytes,
queryInfo.typeInfo.precision, queryInfo.typeInfo.scale,
queryInfo.nullOk);
}
// clean up
dpiVar_release(refCursorVar);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}
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