Chapril/xmpp.chapril.org-ejabberd
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Raise an error when there are no fields to set in ?SQL_UPSERT

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This commit is contained in:
Alexey Shchepin 2016-02-29 16:56:25 +03:00
parent e21f25f5b9
commit 9a049442ff
1 changed files with 35 additions and 6 deletions
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41
src/ejabberd_sql_pt.erl
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@ -60,9 +60,9 @@ transform(Form) ->
case erl_syntax:type(Arg) of
string ->
S = erl_syntax:string_value(Arg),
ParseRes =
parse(S, erl_syntax:get_pos(Arg)),
make_sql_query(ParseRes);
Pos = erl_syntax:get_pos(Arg),
ParseRes = parse(S, Pos),
set_pos(make_sql_query(ParseRes), Pos);
_ ->
throw({error, erl_syntax:get_pos(Form),
"?SQL argument must be "
@ -82,7 +82,10 @@ transform(Form) ->
ParseRes =
parse_upsert(
erl_syntax:list_elements(FieldsArg)),
make_sql_upsert(Table, ParseRes);
Pos = erl_syntax:get_pos(Form),
set_pos(
make_sql_upsert(Table, ParseRes, Pos),
Pos);
_ ->
throw({error, erl_syntax:get_pos(Form),
"?SQL_UPSERT arguments must be "
@ -322,7 +325,8 @@ parse_upsert_field1([C | S], Acc, ParamPos, Loc) ->
parse_upsert_field1(S, [C | Acc], ParamPos, Loc).
make_sql_upsert(Table, ParseRes) ->
make_sql_upsert(Table, ParseRes, Pos) ->
check_upsert(ParseRes, Pos),
erl_syntax:fun_expr(
[erl_syntax:clause(
[erl_syntax:atom(pgsql), erl_syntax:variable("__Version")],
@ -454,6 +458,22 @@ make_sql_upsert_pgsql901(Table, ParseRes) ->
[Upsert]).
check_upsert(ParseRes, Pos) ->
Set =
lists:filter(
fun({_Field, Match, _ST}) ->
not Match
end, ParseRes),
case Set of
[] ->
throw({error, Pos,
"No ?SQL_UPSERT fields to set, use INSERT instead"});
_ ->
ok
end,
ok.
concat_states(States) ->
lists:foldr(
fun(ST11, ST2) ->
@ -507,9 +527,18 @@ resolve_vars(ST1, ST2) ->
ST1#state{params = NewParams, 'query' = NewQuery}.
join_states([], _Sep) ->
#state{};
join_states([H | T], Sep) ->
J = [[H] | [[#state{'query' = [{str, Sep}]}, X] || X <- T]],
concat_states(lists:append(J)).
set_pos(Tree, Pos) ->
erl_syntax_lib:map(
fun(Node) ->
case erl_syntax:get_pos(Node) of
0 -> erl_syntax:set_pos(Node, Pos);
_ -> Node
end
end, Tree).