搜索公共函数

库片段

搜索用户创建的函数

适用于 PostgreSQL

8.4

用

PL/pgSQL

依赖于

无

在您的 PostgreSQL 数据库中搜索所有与任何匹配项匹配的函数。

输入将用作 regexp_matches() 函数中的正则表达式。

例如： 要查找任何函数中的 7-10 个连续数字：

select function_name,matching_terms from search_public_functions('[0-9]{7,10}',true);

页面底部示例字符串

-- load into db as superuser
create or replace function search_public_functions(p_search_strings TEXT, p_case_insensitive BOOLEAN, OUT function_name TEXT, OUT matching_terms TEXT) RETURNS SETOF RECORD AS
$body$
declare
        x                       RECORD;
        qry                     TEXT;
        v_match                 BOOLEAN := 'false';
        v_matches               TEXT;
        v_search_strings        TEXT := p_search_strings;
        v_case_insensitive      BOOLEAN := p_case_insensitive;
        v_funcdef               TEXT;
begin
        /* v_search_strings is a list, pipe-separated, exactly what we want to search against.
           NOTE: works on postgresql v8.4
           example:
           select function_name,matching_terms from search_public_functions('crosstab|intersect|except|ctid',true);
        */

        if (v_case_insensitive IS NOT FALSE) then
                v_case_insensitive := TRUE;
        end if;

        qry :=  'SELECT n.nspname||''.''||p.proname||'' (''||pg_catalog.pg_get_function_arguments(p.oid)||'')''::TEXT as funcname,
                        (select pg_catalog.pg_get_functiondef(p.oid)) as funcdef,
                        p.oid as funcoid
                FROM pg_catalog.pg_proc p
                     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
                WHERE pg_catalog.pg_function_is_visible(p.oid)
                AND n.nspname <> ''pg_catalog''
                AND n.nspname <> ''information_schema''
                AND NOT p.proisagg
                ORDER BY 1';

        if (p_case_insensitive IS TRUE) then
                v_search_strings := LOWER(v_search_strings);
        end if;

        for x in execute qry loop
                v_match := 'false';
                function_name := null;
                v_funcdef := null;

                select into v_match x.funcdef ~* v_search_strings;

                if ( v_match IS TRUE ) then
                        v_matches := null;
                        v_funcdef := x.funcdef;
                        if (p_case_insensitive IS TRUE) then
                                v_funcdef := LOWER(v_funcdef);
                        end if;
                        select array_to_string(array_agg(val),',') into v_matches from (select distinct array_to_string(regexp_matches(v_funcdef, v_search_strings ,'g'),',') as val) as y2;

                        function_name := x.funcname;
                        matching_terms := v_matches;
                        RETURN NEXT;
                end if;
        end loop;
end;
$body$ language plpgsql SECURITY DEFINER;

它可以像这样调用

select function_name,matching_terms from search_public_functions('crosstab|intersect|except|ctid',true);


               function_name                           | matching_terms 
-------------------------------------------------------+----------------
 public.array_intersect (anyarray, anyarray)           | intersect
 public.cant_delete_error ()                           | except
 public.crosstab2 (text)                               | crosstab
 public.crosstab3 (text)                               | crosstab
 public.crosstab4 (text)                               | crosstab
 public.crosstab (text)                                | crosstab
 public.crosstab (text, integer)                       | crosstab
 public.crosstab (text, text)                          | crosstab
 public.find_bad_block (p_tablename text)              | ctid,except

原始代码（以及任何错误）由 bricklen 提供