Laurenz Albe
2020-11-30 14:56:23
在该列的精简版本上创建一个三字母索引：
创建必要的扩展并创建一个不可变的
unaccent被称为f_unaccent（有关更多信息，请参见此处）：CREATE EXTENSION pg_trgm; CREATE EXTENSION unaccent; CREATE OR REPLACE FUNCTION public.immutable_unaccent(regdictionary, text) RETURNS text LANGUAGE c IMMUTABLE PARALLEL SAFE STRICT AS '$libdir/unaccent', 'unaccent_dict'; CREATE OR REPLACE FUNCTION public.f_unaccent(text) RETURNS text LANGUAGE sql IMMUTABLE PARALLEL SAFE STRICT AS $func$ SELECT public.immutable_unaccent(regdictionary 'public.unaccent', $1) $func$;在列上创建三元组索引：
CREATE INDEX ON movie USING gin (translate(f_unaccent(name), '''', '') gin_trgm_ops);现在执行以下查询：
SELECT * FROM movie WHERE translate(f_unaccent(name), '''', '') ILIKE translate(f_unaccent('user_string'), '''');
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