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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoFetchObjects.c
// Demos simple fetch of objects.
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define SQL_TEXT "select ObjectCol " \
"from DemoObjects " \
"order by IntCol"
#define NUM_ATTRS 7
#define NUM_DISPLAY_ATTRS 5
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
uint32_t numQueryColumns, bufferRowIndex, i;
dpiObjectAttr *attrs[NUM_ATTRS];
dpiData *objColValue, attrValue;
dpiNativeTypeNum nativeTypeNum;
dpiObjectTypeInfo typeInfo;
dpiObjectAttrInfo attrInfo;
dpiTimestamp *timestamp;
dpiQueryInfo queryInfo;
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 (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
// get object type and attributes
if (dpiStmt_getQueryInfo(stmt, 1, &queryInfo) < 0)
return dpiSamples_showError();
if (dpiObjectType_getAttributes(queryInfo.typeInfo.objectType, NUM_ATTRS,
attrs) < 0)
return dpiSamples_showError();
if (dpiObjectType_getInfo(queryInfo.typeInfo.objectType, &typeInfo) < 0)
return dpiSamples_showError();
printf("Fetching objects of type %.*s.%.*s\n", typeInfo.schemaLength,
typeInfo.schema, typeInfo.nameLength, typeInfo.name);
// fetch rows
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
if (dpiStmt_getQueryValue(stmt, 1, &nativeTypeNum, &objColValue) < 0)
return dpiSamples_showError();
if (objColValue->isNull)
printf("Row: ObjCol = null\n");
else {
printf("Row: objCol =\n");
for (i = 0; i < NUM_DISPLAY_ATTRS; i++) {
if (dpiObjectAttr_getInfo(attrs[i], &attrInfo) < 0)
return dpiSamples_showError();
printf(" %.*s => ", attrInfo.nameLength, attrInfo.name);
if (dpiObject_getAttributeValue(objColValue->value.asObject,
attrs[i], attrInfo.typeInfo.defaultNativeTypeNum,
&attrValue) < 0)
return dpiSamples_showError();
if (attrValue.isNull)
printf("null\n");
else {
switch (attrInfo.typeInfo.defaultNativeTypeNum) {
case DPI_NATIVE_TYPE_BYTES:
printf("'%.*s'\n", attrValue.value.asBytes.length,
attrValue.value.asBytes.ptr);
break;
case DPI_NATIVE_TYPE_DOUBLE:
printf("%.g\n", attrValue.value.asDouble);
break;
case DPI_NATIVE_TYPE_TIMESTAMP:
timestamp = &attrValue.value.asTimestamp;
printf("%.2d/%.2d/%.2d %.2d:%.2d:%.2d\n",
timestamp->year, timestamp->month,
timestamp->day, timestamp->hour,
timestamp->minute, timestamp->second);
break;
default:
printf("???\n");
break;
}
}
}
}
}
// clean up
for (i = 0; i < NUM_ATTRS; i++)
dpiObjectAttr_release(attrs[i]);
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}