| 1 |
|
%%============================================================================== |
| 2 |
|
%% Copyright 2016 Erlang Solutions Ltd. |
| 3 |
|
%% |
| 4 |
|
%% Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 |
|
%% you may not use this file except in compliance with the License. |
| 6 |
|
%% You may obtain a copy of the License at |
| 7 |
|
%% |
| 8 |
|
%% http://www.apache.org/licenses/LICENSE-2.0 |
| 9 |
|
%% |
| 10 |
|
%% Unless required by applicable law or agreed to in writing, software |
| 11 |
|
%% distributed under the License is distributed on an "AS IS" BASIS, |
| 12 |
|
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 |
|
%% See the License for the specific language governing permissions and |
| 14 |
|
%% limitations under the License. |
| 15 |
|
%%============================================================================== |
| 16 |
|
|
| 17 |
|
-module(mongoose_rdbms_mysql). |
| 18 |
|
-author('konrad.zemek@erlang-solutions.com'). |
| 19 |
|
-behaviour(mongoose_rdbms_backend). |
| 20 |
|
|
| 21 |
|
-type options() :: #{host := string(), |
| 22 |
|
port := inet:port_number(), |
| 23 |
|
database := string(), |
| 24 |
|
username := string(), |
| 25 |
|
password := string(), |
| 26 |
|
atom() => any()}. |
| 27 |
|
|
| 28 |
|
-export([escape_binary/1, unescape_binary/1, connect/2, disconnect/1, |
| 29 |
|
query/3, prepare/5, execute/4]). |
| 30 |
|
|
| 31 |
|
%% API |
| 32 |
|
|
| 33 |
|
-spec escape_binary(binary()) -> iodata(). |
| 34 |
|
escape_binary(Bin) when is_binary(Bin) -> |
| 35 |
:-( |
[<<"X'">>, base16:encode(Bin), <<"'">>]. |
| 36 |
|
|
| 37 |
|
-spec unescape_binary(binary()) -> binary(). |
| 38 |
|
unescape_binary(Bin) when is_binary(Bin) -> |
| 39 |
:-( |
Bin. |
| 40 |
|
|
| 41 |
|
-spec connect(options(), QueryTimeout :: non_neg_integer()) -> |
| 42 |
|
{ok, Connection :: term()} | {error, Reason :: any()}. |
| 43 |
|
connect(Options, QueryTimeout) -> |
| 44 |
:-( |
case mysql:start_link([{query_timeout, QueryTimeout} | db_opts(Options)]) of |
| 45 |
|
{ok, Ref} -> |
| 46 |
:-( |
mysql:query(Ref, <<"set names 'utf8mb4';">>), |
| 47 |
:-( |
mysql:query(Ref, <<"SET SESSION query_cache_type=1;">>), |
| 48 |
:-( |
{ok, Ref}; |
| 49 |
|
Error -> |
| 50 |
:-( |
Error |
| 51 |
|
end. |
| 52 |
|
|
| 53 |
|
-spec disconnect(Connection :: term()) -> any(). |
| 54 |
|
disconnect(Connection) -> |
| 55 |
:-( |
gen_server:stop(Connection). |
| 56 |
|
|
| 57 |
|
-spec query(Connection :: term(), Query :: any(), |
| 58 |
|
Timeout :: infinity | non_neg_integer()) -> mongoose_rdbms:query_result(). |
| 59 |
|
query(Connection, Query, _Timeout) -> |
| 60 |
:-( |
mysql_to_rdbms(mysql:query(Connection, Query), Connection). |
| 61 |
|
|
| 62 |
|
-spec prepare(Connection :: term(), Name :: atom(), Table :: binary(), |
| 63 |
|
Fields :: [binary()], Statement :: iodata()) -> |
| 64 |
|
{ok, term()} | {error, any()}. |
| 65 |
|
prepare(Connection, Name, _Table, _Fields, Statement) -> |
| 66 |
:-( |
mysql:prepare(Connection, Name, Statement). |
| 67 |
|
|
| 68 |
|
-spec execute(Connection :: term(), StatementRef :: term(), Params :: [term()], |
| 69 |
|
Timeout :: infinity | non_neg_integer()) -> mongoose_rdbms:query_result(). |
| 70 |
|
execute(Connection, StatementRef, Params, _Timeout) -> |
| 71 |
:-( |
Params2 = booleans_as_integers(Params), |
| 72 |
:-( |
mysql_to_rdbms(mysql:execute(Connection, StatementRef, Params2), Connection). |
| 73 |
|
|
| 74 |
|
%% Helpers |
| 75 |
|
|
| 76 |
|
-spec db_opts(options()) -> [mysql:option()]. |
| 77 |
|
db_opts(Options) -> |
| 78 |
:-( |
FilteredOpts = maps:with([host, port, database, username, password, tls], Options), |
| 79 |
:-( |
[{found_rows, true} | lists:map(fun process_opt/1, maps:to_list(FilteredOpts))]. |
| 80 |
|
|
| 81 |
:-( |
process_opt({tls, TLSOpts}) -> {ssl, just_tls:make_ssl_opts(TLSOpts)}; |
| 82 |
:-( |
process_opt({username, UserName}) -> {user, UserName}; |
| 83 |
:-( |
process_opt(Opt) -> Opt. |
| 84 |
|
|
| 85 |
|
%% @doc Convert MySQL query result to Erlang RDBMS result formalism |
| 86 |
|
-spec mysql_to_rdbms(mysql:query_result(), Conn :: term()) -> mongoose_rdbms:query_result(). |
| 87 |
|
mysql_to_rdbms(ok, Conn) -> |
| 88 |
:-( |
{updated, mysql:affected_rows(Conn)}; |
| 89 |
|
mysql_to_rdbms({ok, _ColumnNames, Rows}, _Conn) -> |
| 90 |
:-( |
{selected, [list_to_tuple(Row) || Row <- Rows]}; |
| 91 |
|
mysql_to_rdbms({ok, Results}, Conn) -> |
| 92 |
:-( |
[mysql_to_rdbms({ok, Cols, Rows}, Conn) || {Cols, Rows} <- Results]; |
| 93 |
|
mysql_to_rdbms({error, {1062, _SQLState, _Message}}, _Conn) -> |
| 94 |
:-( |
{error, duplicate_key}; |
| 95 |
|
mysql_to_rdbms({error, {_Code, _SQLState, Message}}, _Conn) -> |
| 96 |
:-( |
{error, unicode:characters_to_list(Message)}. |
| 97 |
|
|
| 98 |
|
booleans_as_integers([H|T]) when is_boolean(H) -> |
| 99 |
:-( |
[boolean_to_integer(H)|booleans_as_integers(T)]; |
| 100 |
|
booleans_as_integers([H|T]) -> |
| 101 |
:-( |
[H|booleans_as_integers(T)]; |
| 102 |
|
booleans_as_integers([]) -> |
| 103 |
:-( |
[]. |
| 104 |
|
|
| 105 |
:-( |
boolean_to_integer(true) -> 1; |
| 106 |
:-( |
boolean_to_integer(false) -> 0. |