Failed Indexes

pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 7295; 1259 540987 INDEX by_heading superuser
pg_restore: [archiver (db)] could not execute query: ERROR:  function oils_xpath_string(unknown, text) does not exist
LINE 1: SELECT oils_xpath_string('//*[@tag="901"]/*[local-name()="su...
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
QUERY:  SELECT oils_xpath_string('//*[@tag="901"]/*[local-name()="subfield" and @code="c"]', marcxml)::INT
CONTEXT:  PL/pgSQL function normalize_heading(text,boolean) line 13 during statement block local variable initialization
    Command was: CREATE INDEX by_heading ON record_entry USING btree (simple_normalize_heading(marc)) WHERE ((deleted IS FALSE) OR (deleted =...
pg_restore: [archiver (db)] Error while PROCESSING TOC:
pg_restore: [archiver (db)] Error from TOC entry 7296; 1259 540981 INDEX by_heading_and_thesaurus superuser
pg_restore: [archiver (db)] could not execute query: ERROR:  function oils_xpath_string(unknown, text) does not exist
LINE 1: SELECT oils_xpath_string('//*[@tag="901"]/*[local-name()="su...
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
QUERY:  SELECT oils_xpath_string('//*[@tag="901"]/*[local-name()="subfield" and @code="c"]', marcxml)::INT
CONTEXT:  PL/pgSQL function normalize_heading(text,boolean) line 13 during statement block local variable initialization
    Command was: CREATE INDEX by_heading_and_thesaurus ON record_entry USING btree (normalize_heading(marc)) WHERE ((deleted IS FALSE) OR (de...