[HACKERS] pg_restore & search_path, COPY failed for table "mytable": ERROR: function myinnerfunction(integer) does not exist

[Jean-Pierre Pelletier]

Hi,

The following steps reproduce an error with pg_restore:

DROP TABLE IF EXISTS myTable;
DROP FUNCTION IF EXISTS myInnerFunction(INTEGER);
DROP FUNCTION IF EXISTS myOuterFunction(INTEGER);
DROP SCHEMA IF EXISTS myOtherSchema;

CREATE SCHEMA myOtherSchema;

SET search_path = myPrimarySchema, myOtherSchema, public;

CREATE OR REPLACE FUNCTION myOtherSchema.myInnerFunction(INTEGER) RETURNS
boolean
    LANGUAGE sql IMMUTABLE STRICT
    AS $$
        SELECT TRUE;
$$;

CREATE OR REPLACE FUNCTION myOuterFunction(INTEGER) RETURNS boolean
    LANGUAGE sql IMMUTABLE STRICT
    AS $$
        SELECT myInnerFunction($1);
$$;

CREATE TABLE myTable(
  mycol INTEGER,
  CONSTRAINT MyConstraint CHECK (myOuterFunction(mycol))
);

INSERT INTO myTable VALUES (1);


Do a pg_dump of myTable.

Doing a pg_restore, throws:
COPY failed for table "mytable": ERROR:  function myinnerfunction(integer)
does not exist
LINE 2:  SELECT myInnerFunction($1);
                ^
HINT:  No function matches the given name and argument types. You might
need to add explicit type casts.
QUERY:
        SELECT myInnerFunction($1);
CONTEXT:  SQL function "myouterfunction" during inlining


Using pg_dump plain on myTable shows that search_path is set to
myPrimarySchema, pg_catalog, so is missing myOtherSchema.

I'm puzzled as to how search_path should be used,.
Should all references be schema qualified inside functions body ?
Or is search_path safe except in the body of functions used in index or
constraints ?

That's with version 9.5.3 & 9.6 beta 3.

Thanks,
Jean-Pierre Pelletier


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