sysio::chain::index_utils< Index > Class Template Reference

#include <database_utils.hpp>

Public Types
using	index_t = Index

Static Public Member Functions
template<typename F >
static void	walk (const chainbase::database &db, F function)
template<typename Secondary , typename Key , typename F >
static void	walk_range (const chainbase::database &db, const Key &begin_key, const Key &end_key, F function)
template<typename Secondary , typename Key >
static size_t	size_range (const chainbase::database &db, const Key &begin_key, const Key &end_key)
template<typename F >
static void	create (chainbase::database &db, F cons)

Detailed Description

template<typename Index>
class sysio::chain::index_utils< Index >

Definition at line 13 of file database_utils.hpp.

Member Typedef Documentation

index_t

template<typename Index >

using sysio::chain::index_utils< Index >::index_t = Index

Definition at line 15 of file database_utils.hpp.

Member Function Documentation

create()

template<typename Index >

template<typename F >

static void sysio::chain::index_utils< Index >::create ( chainbase::database & db, F cons )

inlinestatic

Definition at line 50 of file database_utils.hpp.

                                                             {
            db.create<typename index_t::value_type>(cons);
         }

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size_range()

template<typename Index >

template<typename Secondary , typename Key >

static size_t sysio::chain::index_utils< Index >::size_range ( const chainbase::database & db, const Key & begin_key, const Key & end_key )

inlinestatic

Definition at line 38 of file database_utils.hpp.

                                                                                                           {
            const auto& idx = db.get_index<Index, Secondary>();
            auto begin_itr = idx.lower_bound(begin_key);
            auto end_itr = idx.lower_bound(end_key);
            size_t res = 0;
            while (begin_itr != end_itr) {
               res++; ++begin_itr;
            }
            return res;
         }

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walk()

template<typename Index >

template<typename F >

static void sysio::chain::index_utils< Index >::walk ( const chainbase::database & db, F function )

inlinestatic

Definition at line 18 of file database_utils.hpp.

                                                                     {
            auto const& index = db.get_index<Index>().indices();
            const auto& first = index.begin();
            const auto& last = index.end();
            for (auto itr = first; itr != last; ++itr) {
               function(*itr);
            }
         }

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walk_range()

template<typename Index >

template<typename Secondary , typename Key , typename F >

static void sysio::chain::index_utils< Index >::walk_range ( const chainbase::database & db, const Key & begin_key, const Key & end_key, F function )

inlinestatic

Definition at line 28 of file database_utils.hpp.

                                                                                                                     {
            const auto& idx = db.get_index<Index, Secondary>();
            auto begin_itr = idx.lower_bound(begin_key);
            auto end_itr = idx.lower_bound(end_key);
            for (auto itr = begin_itr; itr != end_itr; ++itr) {
               function(*itr);
            }
         }

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The documentation for this class was generated from the following file:

• libraries/chain/include/sysio/chain/database_utils.hpp