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1.6

/src/mod_admin_update_sql.erl

%%%-------------------------------------------------------------------
%%% File    : mod_admin_update_sql.erl
%%% Author  : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Convert SQL DB to the new format
%%% Created :  9 Aug 2017 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2025   ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%-------------------------------------------------------------------

-module(mod_admin_update_sql).
-author('alexey@process-one.net').

-behaviour(gen_mod).

-export([start/2, stop/1, reload/3, mod_options/1,
         get_commands_spec/0, depends/2, mod_doc/0]).

% Commands API
-export([update_sql/0]).

% For testing
-export([update_sql/1]).

-include("logger.hrl").
-include("ejabberd_commands.hrl").
-include_lib("xmpp/include/xmpp.hrl").
-include("ejabberd_sql_pt.hrl").
-include("translate.hrl").

%%%
%%% gen_mod
%%%

start(_Host, _Opts) ->
    {ok, [{commands, get_commands_spec()}]}.

stop(_Host) ->
    ok.

reload(_Host, _NewOpts, _OldOpts) ->
    ok.

depends(_Host, _Opts) ->
    [].

%%%
%%% Register commands
%%%

get_commands_spec() ->
    [#ejabberd_commands{name = update_sql, tags = [sql],
                        desc = "Convert MS SQL, MySQL or PostgreSQL DB to the new format",
                        note = "improved in 23.04",
                        module = ?MODULE, function = update_sql,
                        args = [],
                        args_example = [],
                        args_desc = [],
                        result = {res, rescode},
                        result_example = ok}
    ].

update_sql() ->
    lists:foreach(
      fun(Host) ->
              case ejabberd_sql_sup:is_started(Host) of
                  false ->
                      ok;
                  true ->
                      update_sql(Host)
              end
      end, ejabberd_option:hosts()).

-record(state, {host :: binary(),
                dbtype :: mysql | pgsql | sqlite | mssql | odbc,
                escape}).

update_sql(Host) ->
    LHost = jid:nameprep(Host),
    DBType = ejabberd_option:sql_type(LHost),
    IsSupported =
        case DBType of
            mssql -> true;
            mysql -> true;
            pgsql -> true;
            _ -> false
        end,
    if
        not IsSupported ->
            io:format("Converting ~p DB is not supported~n", [DBType]),
            error;
        true ->
            Escape =
                case DBType of
                    mssql -> fun ejabberd_sql:standard_escape/1;
                    sqlite -> fun ejabberd_sql:standard_escape/1;
                    _ -> fun ejabberd_sql:escape/1
                end,
            State = #state{host = LHost,
                           dbtype = DBType,
                           escape = Escape},
            update_tables(State),
            check_config()
    end.

check_config() ->
    case ejabberd_sql:use_new_schema() of
        true -> ok;
        false ->
            ejabberd_config:set_option(new_sql_schema, true),
            io:format('~nNOTE: you must add "new_sql_schema: true" to ejabberd.yml before next restart~n~n', [])
    end.

update_tables(State) ->
    case add_sh_column(State, "users") of
        true ->
            drop_pkey(State, "users"),
            add_pkey(State, "users", ["server_host", "username", "type"]),
            drop_sh_default(State, "users");
        false ->
            ok
    end,

    case add_sh_column(State, "last") of
        true ->
            drop_pkey(State, "last"),
            add_pkey(State, "last", ["server_host", "username"]),
            drop_sh_default(State, "last");
        false ->
            ok
    end,

    case add_sh_column(State, "rosterusers") of
        true ->
            drop_index(State, "rosterusers", "i_rosteru_user_jid"),
            drop_index(State, "rosterusers", "i_rosteru_username"),
            drop_index(State, "rosterusers", "i_rosteru_jid"),
            create_unique_index(State, "rosterusers", "i_rosteru_sh_user_jid", ["server_host", "username", "jid"]),
            create_index(State, "rosterusers", "i_rosteru_sh_jid", ["server_host", "jid"]),
            drop_sh_default(State, "rosterusers");
        false ->
            ok
    end,

    case add_sh_column(State, "rostergroups") of
        true ->
            drop_index(State, "rostergroups", "pk_rosterg_user_jid"),
            create_index(State, "rostergroups", "i_rosterg_sh_user_jid", ["server_host", "username", "jid"]),
            drop_sh_default(State, "rostergroups");
        false ->
            ok
    end,

    case add_sh_column(State, "sr_group") of
        true ->
            drop_index(State, "sr_group", "i_sr_group_name"),
            create_unique_index(State, "sr_group", "i_sr_group_sh_name", ["server_host", "name"]),
            drop_sh_default(State, "sr_group");
        false ->
            ok
    end,

    case add_sh_column(State, "sr_user") of
        true ->
            drop_index(State, "sr_user", "i_sr_user_jid_grp"),
            drop_index(State, "sr_user", "i_sr_user_jid"),
            drop_index(State, "sr_user", "i_sr_user_grp"),
            create_unique_index(State, "sr_user", "i_sr_user_sh_jid_grp", ["server_host", "jid", "grp"]),
            create_index(State, "sr_user", "i_sr_user_sh_grp", ["server_host", "grp"]),
            drop_sh_default(State, "sr_user");
        false ->
            ok
    end,

    case add_sh_column(State, "spool") of
        true ->
            drop_index(State, "spool", "i_despool"),
            create_index(State, "spool", "i_spool_sh_username", ["server_host", "username"]),
            drop_sh_default(State, "spool");
        false ->
            ok
    end,

    case add_sh_column(State, "archive") of
        true ->
            drop_index(State, "archive", "i_username"),
            drop_index(State, "archive", "i_username_timestamp"),
            drop_index(State, "archive", "i_timestamp"),
            drop_index(State, "archive", "i_peer"),
            drop_index(State, "archive", "i_bare_peer"),
            drop_index(State, "archive", "i_username_peer"),
            drop_index(State, "archive", "i_username_bare_peer"),
            create_index(State, "archive", "i_archive_sh_username_timestamp", ["server_host", "username", "timestamp"]),
            create_index(State, "archive", "i_archive_sh_timestamp", ["server_host", "timestamp"]),
            create_index(State, "archive", "i_archive_sh_username_peer", ["server_host", "username", "peer"]),
            create_index(State, "archive", "i_archive_sh_username_bare_peer", ["server_host", "username", "bare_peer"]),
            drop_sh_default(State, "archive");
        false ->
            ok
    end,

    case add_sh_column(State, "archive_prefs") of
        true ->
            drop_pkey(State, "archive_prefs"),
            add_pkey(State, "archive_prefs", ["server_host", "username"]),
            drop_sh_default(State, "archive_prefs");
        false ->
            ok
    end,

    case add_sh_column(State, "vcard") of
        true ->
            drop_pkey(State, "vcard"),
            add_pkey(State, "vcard", ["server_host", "username"]),
            drop_sh_default(State, "vcard");
        false ->
            ok
    end,

    case add_sh_column(State, "vcard_search") of
        true ->
            drop_pkey(State, "vcard_search"),
            drop_index(State, "vcard_search", "i_vcard_search_lfn"),
            drop_index(State, "vcard_search", "i_vcard_search_lfamily"),
            drop_index(State, "vcard_search", "i_vcard_search_lgiven"),
            drop_index(State, "vcard_search", "i_vcard_search_lmiddle"),
            drop_index(State, "vcard_search", "i_vcard_search_lnickname"),
            drop_index(State, "vcard_search", "i_vcard_search_lbday"),
            drop_index(State, "vcard_search", "i_vcard_search_lctry"),
            drop_index(State, "vcard_search", "i_vcard_search_llocality"),
            drop_index(State, "vcard_search", "i_vcard_search_lemail"),
            drop_index(State, "vcard_search", "i_vcard_search_lorgname"),
            drop_index(State, "vcard_search", "i_vcard_search_lorgunit"),
            add_pkey(State, "vcard_search", ["server_host", "lusername"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lfn",       ["server_host", "lfn"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lfamily",   ["server_host", "lfamily"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lgiven",    ["server_host", "lgiven"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lmiddle",   ["server_host", "lmiddle"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lnickname", ["server_host", "lnickname"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lbday",     ["server_host", "lbday"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lctry",     ["server_host", "lctry"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_llocality", ["server_host", "llocality"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lemail",    ["server_host", "lemail"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lorgname",  ["server_host", "lorgname"]),
            create_index(State, "vcard_search", "i_vcard_search_sh_lorgunit",  ["server_host", "lorgunit"]),
            drop_sh_default(State, "vcard_search");
        false ->
            ok
    end,

    case add_sh_column(State, "privacy_default_list") of
        true ->
            drop_pkey(State, "privacy_default_list"),
            add_pkey(State, "privacy_default_list", ["server_host", "username"]),
            drop_sh_default(State, "privacy_default_list");
        false ->
            ok
    end,

    case add_sh_column(State, "privacy_list") of
        true ->
            drop_index(State, "privacy_list", "i_privacy_list_username"),
            drop_index(State, "privacy_list", "i_privacy_list_username_name"),
            create_unique_index(State, "privacy_list", "i_privacy_list_sh_username_name", ["server_host", "username", "name"]),
            drop_sh_default(State, "privacy_list");
        false ->
            ok
    end,

    case add_sh_column(State, "private_storage") of
        true ->
            drop_index(State, "private_storage", "i_private_storage_username"),
            drop_index(State, "private_storage", "i_private_storage_username_namespace"),
            drop_pkey(State, "private_storage"),
            add_pkey(State, "private_storage", ["server_host", "username", "namespace"]),
            drop_sh_default(State, "private_storage");
        false ->
            ok
    end,

    case add_sh_column(State, "roster_version") of
        true ->
            drop_pkey(State, "roster_version"),
            add_pkey(State, "roster_version", ["server_host", "username"]),
            drop_sh_default(State, "roster_version");
        false ->
            ok
    end,

    case add_sh_column(State, "muc_room") of
        true ->
            drop_sh_default(State, "muc_room");
        false ->
            ok
    end,

    case add_sh_column(State, "muc_registered") of
        true ->
            drop_sh_default(State, "muc_registered");
        false ->
            ok
    end,

    case add_sh_column(State, "muc_online_room") of
        true ->
            drop_sh_default(State, "muc_online_room");
        false ->
            ok
    end,

    case add_sh_column(State, "muc_online_users") of
        true ->
            drop_sh_default(State, "muc_online_users");
        false ->
            ok
    end,

    case add_sh_column(State, "motd") of
        true ->
            drop_pkey(State, "motd"),
            add_pkey(State, "motd", ["server_host", "username"]),
            drop_sh_default(State, "motd");
        false ->
            ok
    end,

    case add_sh_column(State, "sm") of
        true ->
            drop_index(State, "sm", "i_sm_sid"),
            drop_index(State, "sm", "i_sm_username"),
            drop_pkey(State, "sm"),
            add_pkey(State, "sm", ["usec", "pid"]),
            create_index(State, "sm", "i_sm_sh_username", ["server_host", "username"]),
            drop_sh_default(State, "sm");
        false ->
            ok
    end,

    case add_sh_column(State, "push_session") of
        true ->
            drop_index(State, "push_session", "i_push_usn"),
            drop_index(State, "push_session", "i_push_ut"),
            create_unique_index(State, "push_session", "i_push_session_susn", ["server_host", "username", "service", "node"]),
            create_index(State, "push_session", "i_push_session_sh_username_timestamp", ["server_host", "username", "timestamp"]),
            drop_sh_default(State, "push_session");
        false ->
            ok
    end,

    case add_sh_column(State, "mix_pam") of
        true ->
            drop_index(State, "mix_pam", "i_mix_pam"),
            drop_index(State, "mix_pam", "i_mix_pam_u"),
            drop_index(State, "mix_pam", "i_mix_pam_us"),
            create_unique_index(State, "mix_pam", "i_mix_pam", ["username", "server_host", "channel", "service"]),
            drop_sh_default(State, "mix_pam");
        false ->
            ok
    end,

    case add_sh_column(State, "mqtt_pub") of
        true ->
            drop_index(State, "mqtt_pub", "i_mqtt_topic"),
            create_unique_index(State, "mqtt_pub", "i_mqtt_topic_server", ["topic", "server_host"]),
            drop_sh_default(State, "mqtt_pub");
        false ->
            ok
    end,

    ok.

check_sh_column(#state{dbtype = mysql} = State, Table) ->
    DB = ejabberd_option:sql_database(State#state.host),
    sql_query(
      State#state.host,
      ["SELECT 1 FROM information_schema.columns ",
       "WHERE table_name = '", Table, "' AND column_name = 'server_host' ",
       "AND table_schema = '", (State#state.escape)(DB), "' ",
       "GROUP BY table_name, column_name;"], false);
check_sh_column(State, Table) ->
    DB = ejabberd_option:sql_database(State#state.host),
    sql_query(
      State#state.host,
      ["SELECT 1 FROM information_schema.columns ",
       "WHERE table_name = '", Table, "' AND column_name = 'server_host' ",
       "AND table_catalog = '", (State#state.escape)(DB), "' ",
       "GROUP BY table_name, column_name;"], false).

add_sh_column(State, Table) ->
    case check_sh_column(State, Table) of
        true -> false;
        false ->
            do_add_sh_column(State, Table),
            true
    end.

do_add_sh_column(#state{dbtype = pgsql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ADD COLUMN server_host text NOT NULL DEFAULT '",
       (State#state.escape)(State#state.host),
       "';"]);
do_add_sh_column(#state{dbtype = mssql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE [", Table, "] ADD [server_host] varchar (250) NOT NULL ",
       "CONSTRAINT [server_host_default] DEFAULT '",
       (State#state.escape)(State#state.host),
       "';"]);
do_add_sh_column(#state{dbtype = mysql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ADD COLUMN server_host varchar(191) NOT NULL DEFAULT '",
       (State#state.escape)(State#state.host),
       "';"]).

drop_pkey(#state{dbtype = pgsql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " DROP CONSTRAINT ", Table, "_pkey;"]);
drop_pkey(#state{dbtype = mssql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE [", Table, "] DROP CONSTRAINT [", Table, "_PRIMARY];"]);
drop_pkey(#state{dbtype = mysql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " DROP PRIMARY KEY;"]).

add_pkey(#state{dbtype = pgsql} = State, Table, Cols) ->
    Cols2 = lists:map(fun("type") -> "\"type\""; (V) -> V end, Cols),
    SCols = string:join(Cols2, ", "),
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ADD PRIMARY KEY (", SCols, ");"]);
add_pkey(#state{dbtype = mssql} = State, Table, Cols) ->
    SCols = string:join(Cols, "], ["),
    sql_query(
      State#state.host,
      ["ALTER TABLE [", Table, "] ADD CONSTRAINT [", Table, "_PRIMARY] PRIMARY KEY CLUSTERED ([", SCols, "]) ",
       "WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ",
       "ALLOW_PAGE_LOCKS = ON, OPTIMIZE_FOR_SEQUENTIAL_KEY = OFF) ON [PRIMARY];"]);
add_pkey(#state{dbtype = mysql} = State, Table, Cols) ->
    Cols2 = [C ++ mysql_keylen(Table, C) || C <- Cols],
    SCols = string:join(Cols2, ", "),
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ADD PRIMARY KEY (", SCols, ");"]).

drop_sh_default(#state{dbtype = pgsql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ALTER COLUMN server_host DROP DEFAULT;"]);
drop_sh_default(#state{dbtype = mssql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE [", Table, "] DROP CONSTRAINT [server_host_default];"]);
drop_sh_default(#state{dbtype = mysql} = State, Table) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " ALTER COLUMN server_host DROP DEFAULT;"]).

check_index(#state{dbtype = pgsql} = State, Table, Index) ->
    sql_query(
      State#state.host,
      ["SELECT 1 FROM pg_indexes WHERE tablename = '", Table,
       "' AND indexname = '", Index, "';"], false);
check_index(#state{dbtype = mssql} = State, Table, Index) ->
    sql_query(
      State#state.host,
      ["SELECT 1 FROM sys.tables t ",
       "INNER JOIN sys.indexes i ON i.object_id = t.object_id ",
       "WHERE i.index_id > 0 ",
       "AND i.name = '", Index, "' ",
       "AND t.name = '", Table, "';"], false);
check_index(#state{dbtype = mysql} = State, Table, Index) ->
    DB = ejabberd_option:sql_database(State#state.host),
    sql_query(
      State#state.host,
      ["SELECT 1 FROM information_schema.statistics ",
       "WHERE table_name = '", Table, "' AND index_name = '", Index, "' ",
       "AND table_schema = '", (State#state.escape)(DB), "' ",
       "GROUP BY table_name, index_name;"], false).

drop_index(State, Table, Index) ->
    OldIndex = old_index_name(State#state.dbtype, Index),
    case check_index(State, Table, OldIndex) of
        true -> do_drop_index(State, Table, OldIndex);
        false -> ok
    end.

do_drop_index(#state{dbtype = pgsql} = State, _Table, Index) ->
    sql_query(
      State#state.host,
      ["DROP INDEX ", Index, ";"]);
do_drop_index(#state{dbtype = mssql} = State, Table, Index) ->
    sql_query(
      State#state.host,
      ["DROP INDEX [", Index, "] ON [", Table, "];"]);
do_drop_index(#state{dbtype = mysql} = State, Table, Index) ->
    sql_query(
      State#state.host,
      ["ALTER TABLE ", Table, " DROP INDEX ", Index, ";"]).

create_unique_index(#state{dbtype = pgsql} = State, Table, Index, Cols) ->
    SCols = string:join(Cols, ", "),
    sql_query(
      State#state.host,
      ["CREATE UNIQUE INDEX ", Index, " ON ", Table, " USING btree (",
       SCols, ");"]);
create_unique_index(#state{dbtype = mssql} = State, Table, "i_privacy_list_sh_username_name" = Index, Cols) ->
    create_index(State, Table, Index, Cols);
create_unique_index(#state{dbtype = mssql} = State, Table, Index, Cols) ->
    SCols = string:join(Cols, ", "),
    sql_query(
      State#state.host,
      ["CREATE UNIQUE ", mssql_clustered(Index), "INDEX [", new_index_name(State#state.dbtype, Index), "] ",
       "ON [", Table, "] (", SCols, ") ",
       "WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON);"]);
create_unique_index(#state{dbtype = mysql} = State, Table, Index, Cols) ->
    Cols2 = [C ++ mysql_keylen(Index, C) || C <- Cols],
    SCols = string:join(Cols2, ", "),
    sql_query(
      State#state.host,
      ["CREATE UNIQUE INDEX ", Index, " ON ", Table, "(",
       SCols, ");"]).

create_index(#state{dbtype = pgsql} = State, Table, Index, Cols) ->
    NewIndex = new_index_name(State#state.dbtype, Index),
    SCols = string:join(Cols, ", "),
    sql_query(
      State#state.host,
      ["CREATE INDEX ", NewIndex, " ON ", Table, " USING btree (",
       SCols, ");"]);
create_index(#state{dbtype = mssql} = State, Table, Index, Cols) ->
    NewIndex = new_index_name(State#state.dbtype, Index),
    SCols = string:join(Cols, ", "),
    sql_query(
      State#state.host,
      ["CREATE INDEX [", NewIndex, "] ON [", Table, "] (", SCols, ") ",
       "WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON);"]);
create_index(#state{dbtype = mysql} = State, Table, Index, Cols) ->
    NewIndex = new_index_name(State#state.dbtype, Index),
    Cols2 = [C ++ mysql_keylen(NewIndex, C) || C <- Cols],
    SCols = string:join(Cols2, ", "),
    sql_query(
      State#state.host,
      ["CREATE INDEX ", NewIndex, " ON ", Table, "(",
       SCols, ");"]).

old_index_name(mssql, "i_bare_peer") -> "archive_bare_peer";
old_index_name(mssql, "i_peer") -> "archive_peer";
old_index_name(mssql, "i_timestamp") -> "archive_timestamp";
old_index_name(mssql, "i_username") -> "archive_username";
old_index_name(mssql, "i_username_bare_peer") -> "archive_username_bare_peer";
old_index_name(mssql, "i_username_peer") -> "archive_username_peer";
old_index_name(mssql, "i_username_timestamp") -> "archive_username_timestamp";
old_index_name(mssql, "i_push_usn") -> "i_push_usn";
old_index_name(mssql, "i_push_ut") -> "i_push_ut";
old_index_name(mssql, "pk_rosterg_user_jid") -> "rostergroups_username_jid";
old_index_name(mssql, "i_rosteru_jid") -> "rosterusers_jid";
old_index_name(mssql, "i_rosteru_username") -> "rosterusers_username";
old_index_name(mssql, "i_rosteru_user_jid") -> "rosterusers_username_jid";
old_index_name(mssql, "i_despool") -> "spool_username";
old_index_name(mssql, "i_sr_user_jid_grp") -> "sr_user_jid_group";
old_index_name(mssql, Index) -> string:substr(Index, 3);
old_index_name(_Type, Index) -> Index.

new_index_name(mssql, "i_rosterg_sh_user_jid") -> "rostergroups_sh_username_jid";
new_index_name(mssql, "i_rosteru_sh_jid") -> "rosterusers_sh_jid";
new_index_name(mssql, "i_rosteru_sh_user_jid") -> "rosterusers_sh_username_jid";
new_index_name(mssql, "i_sr_user_sh_jid_grp") -> "sr_user_sh_jid_group";
new_index_name(mssql, Index) -> string:substr(Index, 3);
new_index_name(_Type, Index) -> Index.

mssql_clustered("i_mix_pam") -> "";
mssql_clustered("i_push_session_susn") -> "";
mssql_clustered(_) -> "CLUSTERED ".

mysql_keylen(_, "bare_peer") -> "(191)";
mysql_keylen(_, "channel") -> "(191)";
mysql_keylen(_, "domain") -> "(75)";
mysql_keylen(_, "grp") -> "(191)"; %% in mysql*.sql this is text, not varchar(191)
mysql_keylen(_, "jid") -> "(75)";
mysql_keylen(_, "lbday") -> "(191)";
mysql_keylen(_, "lctry") -> "(191)";
mysql_keylen(_, "lemail") -> "(191)";
mysql_keylen(_, "lfamily") -> "(191)";
mysql_keylen(_, "lfn") -> "(191)";
mysql_keylen(_, "lgiven") -> "(191)";
mysql_keylen(_, "llocality") -> "(191)";
mysql_keylen(_, "lmiddle") -> "(191)";
mysql_keylen(_, "lnickname") -> "(191)";
mysql_keylen(_, "lorgname") -> "(191)";
mysql_keylen(_, "lorgunit") -> "(191)";
mysql_keylen(_, "lusername") -> "(191)";
mysql_keylen(_, "name") -> "(75)";
mysql_keylen(_, "namespace") -> "(191)";
mysql_keylen(_, "node") -> "(75)";
mysql_keylen(_, "peer") -> "(191)";
mysql_keylen(_, "pid") -> "(75)";
mysql_keylen(_, "server_host") -> "(191)";
mysql_keylen(_, "service") -> "(191)";
mysql_keylen(_, "topic") -> "(191)";
mysql_keylen("i_privacy_list_sh_username_name", "username") -> "(75)";
mysql_keylen("i_rosterg_sh_user_jid", "username") -> "(75)";
mysql_keylen("i_rosteru_sh_user_jid", "username") -> "(75)";
mysql_keylen(_, "username") -> "(191)";
mysql_keylen(_, _) -> "".

sql_query(Host, Query) ->
    sql_query(Host, Query, true).

sql_query(Host, Query, Log) ->
    case Log of
        true -> io:format("executing \"~ts\" on ~ts~n", [Query, Host]);
        false -> ok
    end,
    case ejabberd_sql:sql_query(Host, Query) of
        {selected, _Cols, []} ->
            false;
        {selected, _Cols, [_Rows]} ->
            true;
        {error, Error} ->
            io:format("error: ~p~n", [Error]),
            false;
        _ ->
            ok
    end.

mod_options(_) -> [].

mod_doc() ->
    #{desc =>
          ?T("This module can be used to update existing SQL database "
             "from the default to the new schema. Check the section "
             "_`database.md#default-and-new-schemas|Default and New Schemas`_ for details. "
             "Please note that only MS SQL, MySQL, and PostgreSQL are supported. "
             "When the module is loaded use _`update_sql`_ API.")}.

processone / ejabberd / 1077

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