Henkel database custom operator '~~‘

Henkel database
Catalog
Environmental Science
Document purpose
Details

Environmental Science
system platform ：Microsoft Windows (64-bit) 10
edition ：5.6.5
Document purpose
Solve problems in the application SQL Statements use !~~ When matching operators , Mistakes encountered ：

ERROR: 42883: operator does not exist: integer !~~ integer

  Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.

Details
One , Test preparation

Create tables and insert data ：

create TABLE oper_test(first_num int);
insert into oper_test values(234),(446),(467);

Two , Test the query

select (446 !~~ first_num) newlist from oper_test;

3、 ... and , Solution ： Custom operators

CREATE OR REPLACE FUNCTION hgdb_catalog.intnlike(integer,integer)
  RETURNS boolean AS $$
  select $1::varchar !~~ $2::varchar;
  $$
  LANGUAGE sql strict;
ALTER FUNCTION intnlike(integer, integer)
  OWNER TO highgo;
COMMENT ON FUNCTION intnlike(integer,integer) IS 'implementation of !~~ operator';
create operator hgdb_catalog.!~~(
    procedure = hgdb_catalog.intnlike,
    leftarg = integer,
    rightarg = integer
);

Four , Query again