查询返回函数名称,行号和包含’thetable’的行：

select *
from (
    select proname,row_number() over (partition by proname) as line,textline
    from (
        select proname,unnest(string_to_array(prosrc,chr(10))) textline
        from pg_proc p
        join pg_namespace n on n.oid = p.pronamespace
        where nspname = 'public'
        and prosrc ilike '%thetable%'
        ) lines
    ) x
    where textline ilike '%thetable%';

具有与表相关联的任何参数或返回值的函数.

例如：

create function f2(rec thetable)...
create function f1() returns setof thetable...

此查询提供函数的名称,返回类型和参数类型：

with rtype as (
    select reltype 
    from pg_class
    where relname = 'thetable')
select distinct on (proname) proname,prorettype,proargtypes
from pg_proc p
join pg_namespace n on n.oid = p.pronamespace
cross join rtype
where nspname = 'public'
and (
    prorettype = reltype 
    or reltype::text = any(string_to_array(proargtypes::text,' ')))

当然,您可以将查询合并为一个.我将它们用于不同的目的.