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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2010 Oracle. All rights reserved.
*
*/
/*
* This file show a exmple of using bfile interface for OSL.
*/
#include <stdio.h>
#include <sqlite3.h>
#include <bfile.h>
typedef sqlite3_int64 bfile_handle;
int exec(sqlite3 *db, char *sql)
{
int rc;
printf("\nRuning:\t%s\n",(sql));
rc = sqlite3_exec(db, (sql), NULL, 0, NULL);
if (rc != SQLITE_OK) {
printf("sqlite3_exec error\n");
return -1;
}
return 0;
}
int query(sqlite3 *db, char *sql)
{
int rc;
sqlite3_stmt *pStmt;
printf("\nRuning:\t%s\n",(sql));
rc = sqlite3_prepare(db, (sql), -1, &pStmt, 0);
if (rc != SQLITE_OK) {
printf("sqlite3_prepare error: \n");
return -1;
}
printf("\tid\tphoto_path\n");
while (SQLITE_ROW == sqlite3_step(pStmt)) {
int res_id = sqlite3_column_int(pStmt, 0);
const char *res_photo =
(const char *)sqlite3_column_text(pStmt, 1);
printf("\t%d\t%s\n", res_id,
res_photo != NULL ? res_photo : "NULL");
}
sqlite3_finalize(pStmt);
return 0;
}
#define cleandb(db) \
sqlite3_exec(db, "DELETE FROM BFILE_DIRECTORY WHERE alias='IMG';", \
NULL, 0, NULL); \
sqlite3_exec(db, "DROP TABLE test_bfile;", NULL, 0, NULL);
#define is_error(rc) (rc != SQLITE_OK && rc != SQLITE_DONE && rc != SQLITE_ROW)
#define cleanup_if_error(rc, pt) if (is_error(rc)) goto pt
static int query_bfile(sqlite3* db) {
int rc, rc2;
sqlite3_stmt *pStmt, *pBfileStmt;
char *photo;
off_t offset;
int row, id, len, i;
bfile_handle bHdl;
const char *sql_bfile_open =
"SELECT id, BFILE_OPEN(photo) FROM test_bfile;";
const char *sql_bfile_read = "SELECT BFILE_READ(?, ?, ?);";
const char *sql_bfile_close = "SELECT BFILE_CLOSE(?);";
const int amount = 80;
pStmt = NULL;
printf("\nRUNNING: query id, photo\n");
/* BFILE_OPEN */
rc = sqlite3_prepare(db, sql_bfile_open, -1, &pStmt, 0);
if (rc != SQLITE_OK) {
printf("BFILE_OPEN: prepare error\n");
return -1;
}
row = 0;
while (SQLITE_ROW == (rc = sqlite3_step(pStmt))) {
printf("-------------row%d------------\n", ++row);
id = sqlite3_column_int(pStmt, 0);
bHdl = sqlite3_column_int64(pStmt, 1);
printf("id:\n%d\nphoto:\n", id);
if ((void*)bHdl == NULL) {
printf("NULL\n");
continue;
}
offset = 0;
/* BFILE_READ */
rc2 = sqlite3_prepare(db, sql_bfile_read, -1, &pBfileStmt, 0);
cleanup_if_error(rc2, cleanup_read);
while (1) {
rc2 = sqlite3_bind_int64(pBfileStmt, 1, bHdl);
cleanup_if_error(rc2, cleanup_read);
rc2 = sqlite3_bind_int(pBfileStmt, 2, amount);
cleanup_if_error(rc2, cleanup_read);
rc2 = sqlite3_bind_int(pBfileStmt, 3, offset);
cleanup_if_error(rc2, cleanup_read);
rc2 = sqlite3_step(pBfileStmt);
cleanup_if_error(rc2, cleanup_read);
if (rc2 == SQLITE_ROW) {
photo =
(char*)sqlite3_column_blob(pBfileStmt, 0);
len = sqlite3_column_bytes(pBfileStmt, 0);
/* EOF */
if (len == 0)
break;
for(i=0; i<len; i++)
putchar(photo[i]);
}
rc2 = sqlite3_reset(pBfileStmt);
cleanup_if_error(rc2, cleanup_read);
rc2 = sqlite3_clear_bindings(pBfileStmt);
cleanup_if_error(rc2, cleanup_read);
offset += amount;
}
cleanup_read:
if (pBfileStmt != NULL) {
sqlite3_finalize(pBfileStmt);
pBfileStmt = NULL;
}
/* BFILE_CLOSE */
rc2 = sqlite3_prepare(db, sql_bfile_close, -1, &pBfileStmt, 0);
cleanup_if_error(rc2, cleanup_close);
rc2 = sqlite3_bind_int64(pBfileStmt, 1, bHdl);
cleanup_if_error(rc2, cleanup_close);
rc2 = sqlite3_step(pBfileStmt);
cleanup_close:
if (pBfileStmt != NULL) {
sqlite3_finalize(pBfileStmt);
pBfileStmt = NULL;
}
}
if (pStmt != NULL) {
sqlite3_finalize(pStmt);
pStmt = NULL;
}
if (!is_error(rc) && is_error(rc2))
rc = rc2;
rc = !is_error(rc) ? 0 : -1;
return rc;
}
int prepare_db(sqlite3 *db)
{
/* create directory alias */
exec(db, "SELECT BFILE_CREATE_DIRECTORY('IMG', './temp');");
/* create table */
exec(db, "CREATE TABLE test_bfile(id INT, photo BFILE);");
/* insert */
exec(db, "INSERT INTO test_bfile VALUES(1, BFILE_NAME('IMG','Tony.jpg'));");
/* insert */
exec(db, "INSERT INTO test_bfile VALUES(2, BFILE_NAME('IMG','Rachel.jpg'));");
/* insert */
exec(db, "INSERT INTO test_bfile VALUES(3, BFILE_NAME('IMG','Tracy.jpg'));");
/* insert */
exec(db, "INSERT INTO test_bfile VALUES(4, NULL);");
return 0;
}
int change_dir(sqlite3 *db)
{
/* query */
query(db, "SELECT id, BFILE_FULLPATH(photo) FROM test_bfile;");
/* update alias */
exec(db, "SELECT BFILE_REPLACE_DIRECTORY('IMG', './photo');");
/* query */
query(db, "SELECT id, BFILE_FULLPATH(photo) FROM test_bfile;");
return 0;
}
int main(int argc, char **argv) {
sqlite3 *db;
sqlite3_stmt *pStmt;
int rc;
rc = sqlite3_open("example.db", &db);
if (rc != SQLITE_OK) {
printf("db open error\n");
return -1;
}
sqlite3_enable_load_extension(db, 1);
rc = sqlite3_load_extension(db, "libbfile_ext.so", NULL, NULL);
if (rc != SQLITE_OK) {
printf("load bfile extension error\n");
return -1;
}
/* clean the database */
cleandb(db);
/* create table & directory, and insert data */
rc = prepare_db(db);
if (rc) return -1;
/* query bfile data */
rc = query_bfile(db);
if (rc) return -1;
/* replace directory alias */
rc = change_dir(db);
if (rc) return -1;
sqlite3_close(db);
return 0;
}
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