|
public Find ( |
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| txn | ||
| key | byte | |
| return | byte[] | |
private void InsertRecNo()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] r1 = new byte[5];
byte[] r2;
try
{
env.Create("ntest.db");
db = env.CreateDatabase(1, UpsConst.UPS_RECORD_NUMBER);
r1[0] = 1;
var k = db.InsertRecNo(r1);
r2 = db.Find(k);
checkEqual(r1, r2);
r1[0] = 2;
k = db.InsertRecNo(r1);
r2 = db.Find(k);
checkEqual(r1, r2);
r1[0] = 3;
k = db.InsertRecNo(r1);
r2 = db.Find(k);
checkEqual(r1, r2);
}
catch (DatabaseException e)
{
Assert.Fail("unexpected exception " + e);
}
db.Close();
env.Close();
}
private void InsertKey()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] k = new byte[5];
byte[] r1 = new byte[5];
byte[] r2;
try {
env.Create("ntest.db");
db = env.CreateDatabase(1);
k[0] = 1;
r1[0] = 1;
db.Insert(k, r1);
r2 = db.Find(k);
checkEqual(r1, r2);
k[0] = 2;
r1[0] = 2;
db.Insert(k, r1);
r2 = db.Find(k);
checkEqual(r1, r2);
k[0] = 3;
r1[0] = 3;
db.Insert(k, r1);
r2 = db.Find(k);
checkEqual(r1, r2);
db.Close();
env.Close();
}
catch (DatabaseException e) {
Assert.Fail("unexpected exception " + e);
}
}
private void InsertKeyOverwrite()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] k = new byte[5];
byte[] r = new byte[5];
try {
env.Create("ntest.db");
db = env.CreateDatabase(1);
db.Insert(k, r);
r[0] = 1;
db.Insert(k, r, UpsConst.UPS_OVERWRITE);
byte[] r2 = db.Find(k);
checkEqual(r, r2);
db.Close();
env.Close();
}
catch (DatabaseException e) {
Assert.Fail("unexpected exception " + e);
}
}
private void FindUnknownKey()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] k = new byte[5];
try {
env.Create("ntest.db");
db = env.CreateDatabase(1);
byte[] r = db.Find(k);
}
catch (DatabaseException e) {
Assert.AreEqual(UpsConst.UPS_KEY_NOT_FOUND, e.ErrorCode);
}
db.Close();
env.Close();
}
private void FindKeyNull()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
try {
env.Create("ntest.db");
db = env.CreateDatabase(1);
byte[] r = db.Find(null);
}
catch (NullReferenceException) {
}
db.Close();
env.Close();
}
private void EraseKeyTwice()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] k = new byte[5];
byte[] r = new byte[5];
env.Create("ntest.db");
db = env.CreateDatabase(1);
db.Insert(k, r);
byte[] r2 = db.Find(k);
checkEqual(r, r2);
db.Erase(k);
try {
db.Erase(k);
}
catch (DatabaseException e) {
Assert.AreEqual(UpsConst.UPS_KEY_NOT_FOUND, e.ErrorCode);
}
db.Close();
env.Close();
}
private void ApproxMatching()
{
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
byte[] k1 = new byte[5];
byte[] r1 = new byte[5];
k1[0] = 1; r1[0] = 1;
byte[] k2 = new byte[5];
byte[] r2 = new byte[5];
k2[0] = 2; r2[0] = 2;
byte[] k3 = new byte[5];
byte[] r3 = new byte[5];
k3[0] = 3; r3[0] = 3;
try
{
env.Create("ntest.db");
db = env.CreateDatabase(1);
db.Insert(k1, r1);
db.Insert(k2, r2);
db.Insert(k3, r3);
byte[] r = db.Find(null, ref k2, UpsConst.UPS_FIND_GT_MATCH);
checkEqual(r, r3);
checkEqual(k2, k3);
k2[0] = 2;
r = db.Find(null, ref k2, UpsConst.UPS_FIND_LT_MATCH);
checkEqual(r, r1);
checkEqual(k2, k1);
db.Close();
env.Close();
}
catch (DatabaseException e)
{
Assert.Fail("unexpected exception " + e);
}
}
static void Main(string[] args)
{
byte[] key = new byte[5];
byte[] record = new byte[5];
Upscaledb.Environment env = new Upscaledb.Environment();
Database db = new Database();
/*
* first, create a new Database
*/
env.Create("test.db");
db = env.CreateDatabase(1);
/*
* now we can insert, delete or lookup values in the Database
*
* for our test program, we just insert a few values, then look them
* up, then delete them and try to look them up again (which will fail).
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
record[0] = (byte)i;
db.Insert(key, record);
}
/*
* now look up all values
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
byte[] r = db.Find(key);
/*
* check if the value is ok
*/
if (r[0] != (byte)i) {
Console.Out.WriteLine("db.Find() returned bad value");
return;
}
}
/*
* close the Database handle, then re-open it (just to demonstrate how
* to open a Database file)
*/
db.Close();
env.Close();
env.Open("test.db");
db = env.OpenDatabase(1);
/*
* now erase all values
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
db.Erase(key);
}
/*
* once more we try to find all values... every db.Find() call must
* now fail with HAM_KEY_NOT_FOUND
*/
for (int i = 0; i < LOOP; i++) {
key[0] = (byte)i;
try {
byte[] r = db.Find(key);
}
catch (DatabaseException e) {
if (e.ErrorCode != UpsConst.UPS_KEY_NOT_FOUND) {
Console.Out.WriteLine("db.Find() returned error " + e);
return;
}
}
}
/*
* We're done! No need to close the Database handle - it's closed automatically
*/
Console.Out.WriteLine("Success!");
}