Commit 2c717d34 authored by louiz’'s avatar louiz’

Add an index for the muc_log_line table

This immensely speeds up the archive select queries.

fix #3292
parent 655151d8
......@@ -6,6 +6,8 @@
#include <utils/get_first_non_empty.hpp>
#include <utils/time.hpp>
#include <database/index.hpp>
#include <sqlite3.h>
sqlite3* Database::db;
......@@ -42,6 +44,7 @@ void Database::open(const std::string& filename)
Database::irc_channel_options.upgrade(Database::db);
Database::roster.create(Database::db);
Database::roster.upgrade(Database::db);
create_index<Database::Owner, Database::IrcChanName, Database::IrcServerName>(Database::db, "archive_index", Database::muc_log_lines.get_name());
}
......
#pragma once
#include <sqlite3.h>
#include <string>
#include <tuple>
namespace
{
template <std::size_t N=0, typename... T>
typename std::enable_if<N == sizeof...(T), void>::type
add_column_name(std::string&)
{ }
template <std::size_t N=0, typename... T>
typename std::enable_if<N < sizeof...(T), void>::type
add_column_name(std::string& out)
{
using ColumnType = typename std::remove_reference<decltype(std::get<N>(std::declval<std::tuple<T...>>()))>::type;
out += ColumnType::name;
if (N != sizeof...(T) - 1)
out += ",";
add_column_name<N+1, T...>(out);
}
}
template <typename... Columns>
void create_index(sqlite3* db, const std::string& name, const std::string& table)
{
std::string res{"CREATE INDEX IF NOT EXISTS "};
res += name + " ON " + table + "(";
add_column_name<0, Columns...>(res);
res += ")";
char* error;
const auto result = sqlite3_exec(db, res.data(), nullptr, nullptr, &error);
if (result != SQLITE_OK)
{
log_error("Error executing query: ", error);
sqlite3_free(error);
}
}
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