summaryrefslogtreecommitdiff
path: root/libpqpp/pq-bulkselectcommand.cpp
blob: 81f3e48b20f97759798b42736eb8ea0844dd9b11 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
#include "pq-bulkselectcommand.h"
#include "pq-connection.h"
#include "pq-column.h"
#include "pq-error.h"

PQ::BulkSelectCommand::BulkSelectCommand(Connection * conn, const std::string & sql, const PQ::CommandOptionsCPtr & pqco, const DB::CommandOptionsCPtr & opts) :
	DB::Command(sql),
	PQ::SelectBase(sql, pqco),
	PQ::PreparedStatement(conn, sql, opts),
	executed(false)
{
}

void
PQ::BulkSelectCommand::execute()
{
	if (!executed) {
		execRes = c->checkResult(
				PQexecPrepared(c->conn, prepare(), values.size(), &values.front(), &lengths.front(), &formats.front(), binary),
				PGRES_TUPLES_OK);
		nTuples = PQntuples(execRes);
		tuple = -1;
		createColumns(execRes);
		executed = true;
	}
}

bool
PQ::BulkSelectCommand::fetch()
{
	execute();
	if (++tuple < nTuples) {
		return true;
	}
	else {
		PQclear(execRes);
		execRes = NULL;
		executed = false;
		return false;
	}
}