Chapril/xmpp.chapril.org-ejabberd
25
1
Fork 0
mirror of https://github.com/processone/ejabberd.git synced 2024-11-22 16:20:52 +01:00
Code Releases Activity
a63d3bf0d6
xmpp.chapril.org-ejabberd/src/mod_admin_update_sql.erl

639 lines
24 KiB
Erlang
Raw Blame History

%%%-------------------------------------------------------------------
%%% 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) 2002-2023 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) ->
ejabberd_commands:register_commands(?MODULE, get_commands_spec()).
stop(_Host) ->
ejabberd_commands:unregister_commands(get_commands_spec()).
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,
result_desc = "Status code: 0 on success, 1 otherwise"}
].
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"]),
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"),
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"),
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) ->
SCols = string:join(Cols, ", "),
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(_, "jid") -> "(75)";
mysql_keylen(_, "name") -> "(75)";
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 "
"http://../database/#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.")}.
View Git Blame Copy Permalink