postgresql - How to create text search configuration if not exists on PostgreSQL?

Question

How to create text search configuration but only when it doesn't exists? For instance, like the other create statements:

CREATE TEXT SEARCH CONFIGURATION IF NOT EXISTS text_without_accent (COPY = simple);

Answer 1

使用DO语句并捕获错误：

DO
$$BEGIN
   CREATE TEXT SEARCH CONFIGURATION ...
EXCEPTION
   WHEN unique_violation THEN
      NULL;  -- ignore error
END;$$;

Answer 2

先删除它，然后再创建它：

DROP TEXT SEARCH CONFIGURATION IF EXISTS text_without_accent cascade;
CREATE TEXT SEARCH CONFIGURATION text_without_accent (COPY = simple);