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Henkel database custom operator '! ~~'

2022-06-21 20:35:00 【51CTO】

Henkel database

Catalog

Environmental Science

Document purpose

Details

Environment 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.
      
      
      
      
       
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Details

One , Test preparation

Create tables and insert data ：

      
      
       
       create TABLE oper_test(first_num int);
       
       
insert into oper_test values(234),(446),(467);
      
      
      
      
       
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Two , Test the query

      
      
       
       select (446 !~~ first_num) newlist from oper_test;
      
      
      
      
       
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Henkel database custom operator

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
       
       
);
      
      
      
      
       
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