int main()
{
int rc = 0;
// set default password if none specified in environment
setenv("ISC_USER", "sysdba", 0);
setenv("ISC_PASSWORD", "masterkey", 0);
// With ThrowStatusWrapper passed as status interface FbException will be thrown on error
ThrowStatusWrapper status(master->getStatus());
// Declare pointers to required interfaces
IProvider* prov = master->getDispatcher();
IAttachment* att = NULL;
ITransaction* tra = NULL;
IBlob* blob = NULL;
try
{
// create database
att = prov->createDatabase(&status, "blob_07.fdb", 0, NULL);
tra = att->startTransaction(&status, 0, NULL);
// create table
att->execute(&status, tra, 0, "create table blobs_table (b blob sub_type text)", SAMPLES_DIALECT,
NULL, NULL, NULL, NULL);
tra->commitRetaining(&status);
// Message for data exchange
FB_MESSAGE(Msg, ThrowStatusWrapper,
(FB_BLOB, b)
) message(&status, master);
message.clear();
// create blob
blob = att->createBlob(&status, tra, &message->b, 0, NULL);
// populate blob with data
for (const char** seg = testData; *seg; ++seg)
blob->putSegment(&status, strlen(*seg), *seg);
blob->close(&status);
blob = NULL;
// insert blob into the table
att->execute(&status, tra, 0, "insert into blobs_table(b) values(?)", SAMPLES_DIALECT,
message.getMetadata(), message.getData(), NULL, NULL);
tra->commitRetaining(&status);
printf("Test blob inserted into blobs_table\n...\n");
// Read blob from table
message.clear();
att->execute(&status, tra, 0, "select first(1) b from blobs_table", SAMPLES_DIALECT,
NULL, NULL, message.getMetadata(), message.getData());
blob = att->openBlob(&status, tra, &message->b, 0, NULL);
// Read segments from blob
// Use very small segment buffer to show read of incomplete segment
printf("Read inserted blob from blobs_table\n...\n");
int bufOver = 0;
for(bool eof = false; !eof; )
{
const char* lineFeed = "\n";
char buf[32];
unsigned l = 0;
switch (blob->getSegment(&status, sizeof(buf) - 1, buf, &l))
{
case IStatus::RESULT_OK:
break;
case IStatus::RESULT_SEGMENT:
lineFeed = "";
bufOver++;
break;
default:
eof = true;
continue;
}
buf[l] = 0;
printf("%s%s", buf, lineFeed);
}
printf("\nSegment not fit in buffer counter = %d\n\n", bufOver);
// cleanup
blob->close(&status);
blob = NULL;
tra->commit(&status);
tra = NULL;
// uncomment next line to play with errors during drop database
// printf("Attach with any client to blob_07.fdb to prevent it being dropped and press enter"); getchar();
// drop database
drop(&att);
}
catch (const FbException& error)
{
// handle error
rc = 1;
errPrint(error.getStatus());
if (att)
drop(&att);
}
// release interfaces after error caught
if (blob)
blob->release();
if (tra)
tra->release();
if (att)
att->release();
status.dispose();
prov->release();
return rc;
}
int main()
{
int rc = 0;
// set default password if none specified in environment
setenv("ISC_USER", "sysdba", 0);
setenv("ISC_PASSWORD", "masterkey", 0);
// Declare pointers to required interfaces
// IStatus is used to return wide error description to user
IStatus* st = NULL;
// IProvider is needed to start to work with database (or service)
IProvider* prov = NULL;
// IAttachment and ITransaction contain methods to work with database attachment
// and transactions
IAttachment* att = NULL;
ITransaction* tra = NULL;
try
{
// status vector and main dispatcher are returned by calls to IMaster functions
// no error return may happen - these functions always succeed
st = master->getStatus();
prov = master->getDispatcher();
// status wrapper - will be used later in all calls where status interface is needed
// With ThrowStatusWrapper passed as status interface FbException will be thrown on error
ThrowStatusWrapper status(st);
// create DPB (to be replaced with IPBWriter)
unsigned char dpbBuf[32];
unsigned char *dpb = dpbBuf;
*dpb++ = isc_dpb_version1;
*dpb++ = isc_dpb_page_size;
*dpb++ = 2;
*dpb++ = (8 * 1024) & 0xFF;
*dpb++ = (8 * 1024) >> 8;
// create empty database
att = prov->createDatabase(&status, "fbtests.fdb", dpb - dpbBuf, dpbBuf);
printf("Database fbtests.fdb created\n");
// detach from database
att->detach(&status);
att = NULL;
// attach it once again
att = prov->attachDatabase(&status, "fbtests.fdb", 0, NULL);
printf("Re-attached database fbtests.fdb\n");
// start transaction
tra = att->startTransaction(&status, 0, NULL);
// create table
att->execute(&status, tra, 0, "create table dates_table (d1 date)", 3,
NULL, NULL, NULL, NULL); // Input parameters and output data not used
// commit transaction retaining
tra->commitRetaining(&status);
printf("Table dates_table created\n");
// insert a record into dates_table
att->execute(&status, tra, 0, "insert into dates_table values (CURRENT_DATE)", 3,
NULL, NULL, NULL, NULL); // Input parameters and output data not used
// commit transaction (will close interface)
tra->commit(&status);
tra = NULL;
printf("Record inserted into dates_table\n");
// detach from database (will close interface)
att->detach(&status);
att = NULL;
}
catch (const FbException& error)
{
// handle error
rc = 1;
isc_print_status(error.getStatus()->getErrors());
}
// release interfaces after error caught
if (tra)
tra->release();
if (att)
att->release();
if (prov)
prov->release();
if (st)
st->dispose();
return rc;
}