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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoBFILE.c
// Demos whether BFILEs are handled properly using ODPI-C.
//
// NOTE: the program assumes that you have write access to the
// directory path pointed to by the directory object, i.e. that the
// program is being run on the same machine as the database.
//
// DIR_NAME is specified in the Makefile
//
//-----------------------------------------------------------------------------
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "SampleLib.h"
#define SQL_TEXT_QUERY_DIR "select directory_path " \
"from all_directories " \
"where directory_name = :1"
#define SQL_TEXT_DELETE "delete from DemoBFILEs"
#define SQL_TEXT_INSERT "insert into DemoBFILEs " \
"values (:IntValue, :BFILEValue)"
#define SQL_TEXT_QUERY "select IntCol, BFILECol " \
"from DemoBFILEs"
#define FILE_NAME "demo_contents.txt"
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiData *intColValue, *bfileColValue, *pathValue, *bfileValue, intValue;
uint32_t numQueryColumns, bufferRowIndex, i;
dpiNativeTypeNum nativeTypeNum;
dpiSampleParams *params;
dpiQueryInfo queryInfo;
uint64_t blobSize;
dpiData bindValue;
dpiVar *bfileVar;
dpiStmt *stmt;
dpiConn *conn;
char *path;
int found;
FILE *fp;
// connect to database
params = dpiSamples_getParams();
conn = dpiSamples_getConn(0, NULL);
printf("Note: this demo must be run on the same machine as the database\n");
// find the directory path location by querying from the database
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_QUERY_DIR,
strlen(SQL_TEXT_QUERY_DIR), NULL, 0, &stmt) < 0)
return dpiSamples_showError();
dpiData_setBytes(&bindValue, (char*) params->dirName,
params->dirNameLength);
if (dpiStmt_bindValueByPos(stmt, 1, DPI_NATIVE_TYPE_BYTES, &bindValue) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (dpiStmt_getQueryValue(stmt, 1, &nativeTypeNum, &pathValue) < 0)
return dpiSamples_showError();
path = malloc(pathValue->value.asBytes.length + 1);
if (!path) {
printf("ERROR: unable to duplicate path string!?\n");
return -1;
}
memcpy(path, pathValue->value.asBytes.ptr,
pathValue->value.asBytes.length);
path[pathValue->value.asBytes.length] = '\0';
dpiStmt_release(stmt);
printf("%.*s path is '%s'\n", params->dirNameLength, params->dirName,
path);
// write a temporary file at that location
if (chdir(path) < 0) {
printf("ERROR: unable to change directory to %.*s location\n",
params->dirNameLength, params->dirName);
return -1;
}
free(path);
printf("Writing file named '%s'\n", FILE_NAME);
fp = fopen(FILE_NAME, "w");
if (!fp) {
printf("ERROR: unable to open demo file for writing\n");
return -1;
}
fprintf(fp, "These are some demo comments.\nFile can be deleted.\n");
fclose(fp);
// delete existing rows in table
printf("Delete existing rows in table...\n");
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_DELETE, strlen(SQL_TEXT_DELETE),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
dpiStmt_release(stmt);
// inserting row into table
printf("Inserting row into table...\n");
if (dpiConn_newVar(conn, DPI_ORACLE_TYPE_BFILE, DPI_NATIVE_TYPE_LOB, 1, 0,
0, 0, NULL, &bfileVar, &bfileValue) < 0)
return dpiSamples_showError();
bfileValue->isNull = 0;
if (dpiLob_setDirectoryAndFileName(bfileValue->value.asLOB,
params->dirName, params->dirNameLength, FILE_NAME,
strlen(FILE_NAME)) < 0)
return dpiSamples_showError();
intValue.isNull = 0;
intValue.value.asInt64 = 1;
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_INSERT, strlen(SQL_TEXT_INSERT),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_bindValueByPos(stmt, 1, DPI_NATIVE_TYPE_INT64, &intValue) < 0)
return dpiSamples_showError();
if (dpiStmt_bindByPos(stmt, 2, bfileVar) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
if (dpiConn_commit(conn) < 0)
return dpiSamples_showError();
dpiStmt_release(stmt);
dpiVar_release(bfileVar);
// querying row from table
printf("Querying row from table...\n");
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT_QUERY, strlen(SQL_TEXT_QUERY),
NULL, 0, &stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, &numQueryColumns) < 0)
return dpiSamples_showError();
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
if (dpiStmt_getQueryValue(stmt, 1, &nativeTypeNum, &intColValue) < 0 ||
dpiStmt_getQueryValue(stmt, 2, &nativeTypeNum,
&bfileColValue) < 0)
return dpiSamples_showError();
if (dpiLob_getSize(bfileColValue->value.asLOB, &blobSize) < 0)
return dpiSamples_showError();
printf("Row: IntCol = %g, BfileCol = BFILE(%" PRIu64 ")\n",
intColValue->value.asDouble, blobSize);
}
// display description of each variable
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
dpiStmt_release(stmt);
dpiConn_release(conn);
printf("Done.\n");
return 0;
}
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