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#include "pqStmt.h"
#include "libpq-fe.h"
#include "pqBindings.h"
#include "pqConn.h"
#include "pqRecordSet.h"
#include <compileTimeFormatter.h>
#include <cstdlib>
#include <functional>
#include <helpers.h>
#include <map>
#include <stdexcept>
#include <utility>
#include <vector>
namespace MyGrate::Output::Pq {
PqPrepStmt::PqPrepStmt(const char * const q, std::size_t n, PqConn * c) :
conn {c->conn.get()}, name {prepareAsNeeded(q, n, c)}, res {nullptr, nullptr}
{
}
void
PqPrepStmt::execute(const std::span<const DbValue> vs)
{
Bindings b {vs};
res = {PQexecPrepared(conn, name.c_str(), static_cast<int>(vs.size()), b.values.data(), b.lengths.data(),
b.formats.data(), 0),
&PQclear};
verify<PqErr>(PQresultStatus(res.get()) == PGRES_COMMAND_OK || PQresultStatus(res.get()) == PGRES_TUPLES_OK,
name, conn);
}
std::size_t
PqPrepStmt::rows() const
{
return std::strtoul(PQcmdTuples(res.get()), nullptr, 10);
}
RecordSetPtr
PqPrepStmt::recordSet()
{
return std::make_unique<PqRecordSet>(std::move(res));
}
CursorPtr
PqPrepStmt::cursor()
{
throw std::logic_error("Not implemented");
}
std::string
PqPrepStmt::prepareAsNeeded(const char * const q, std::size_t n, PqConn * c)
{
if (const auto i = c->stmts.find(q); i != c->stmts.end()) {
return i->second;
}
auto nam {scprintf<"pst%0lx">(c->stmts.size())};
ResPtr res {PQprepare(c->conn.get(), nam.c_str(), q, static_cast<int>(n), nullptr), PQclear};
verify<PqErr>(PQresultStatus(res.get()) == PGRES_COMMAND_OK, q, c->conn.get());
return c->stmts.emplace(q, std::move(nam)).first->second;
}
}
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