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#include "pq-bulkselectcommand.h"
#include "pq-column.h"
#include "pq-connection.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(), static_cast<int>(values.size()), &values.front(),
&lengths.front(), &formats.front(), binary),
PGRES_TUPLES_OK);
nTuples = static_cast<decltype(nTuples)>(PQntuples(execRes));
tuple = static_cast<decltype(tuple)>(-1);
createColumns(execRes);
executed = true;
}
}
bool
PQ::BulkSelectCommand::fetch()
{
execute();
if (++tuple < nTuples) {
return true;
}
else {
PQclear(execRes);
execRes = nullptr;
executed = false;
return false;
}
}
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