TG_RELNAME problem

Hello ,

When i use TG_RELNAME with SELECT INTO and from

Create or replace function "fn_i_generate_path_category"() returns trigger as '
declare
n integer;
category RECORD;
tmp RECORD;
begin
raise notice ''%'',TG_RELNAME;
if new."path" = '''' then
SELECT INTO tmp "id_category" from TG_RELNAME where "path" = ''Top'';
if FOUND then
...............

When function is started i get error:

ERROR: syntax error at or near "$1" at character 29

What can I do

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