Question

我正在使用执行格式执行SQL查询，这需要将多个变量作为参数传递。在这里，我的查询需要很多符号，例如：'%' and ','

因此我的查询非常大，超过了100个参数的限制。那么有没有办法在查询本身中包含'%' and ','，而不是将其作为参数传递。

查询：

 execute format('CREATE MATERIALIZED VIEW %I AS 
        SELECT id,
               (select count(*) from friends bob where (i.name ilike any (string_to_array(replace( concat(%L,bob.keywords,%L),%L,%L),%L)) or 
i.description ilike any (string_to_array(replace( concat(%L,bob.keywords,%L),%L,%L),%L)) or
 i.additional_info ilike any (string_to_array(replace( concat(%L,bob.keywords,%L),%L,%L),%L)) or 
i.eventful_category ilike any (string_to_array(replace( concat(%L,bob.keywords,%L),%L,%L),%L)) or
 i.other_category ilike any (string_to_array(replace( concat(%L,bob.keywords,%L),%L,%L),%L)) )) as friend_bob
from events i ','FrienView','%','%',',','%,%',',','%','%',',','%,%',',','%','%',',','%,%',',','%','%',',','%,%',',','%','%',',','%,%',',')

Answer 1

根据docs

concat，concat_ws和format函数是可变参数，因此它是可以传递要连接或格式化为的值标有VARIADIC关键字
的数组

您可以使用ARRAY来克服限制，例如：制备：

with n as (select generate_series(1,101,1) g) 
  select $$SELECT format('$$||string_agg('%s',',')||$$',$$||string_agg(g::text,',')||')' 
  from n;

运行：

SELECT format('%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s',1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101);

错误：不能将超过100个参数传递给函数

as array：

SELECT format('%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s'
,VARIADIC ARRAY[1, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101]);

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24 ，25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49 ，50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74 ，75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101 （1排）

但我会停下来思考 - 你真的想传递100个参数吗？

Postgresql：执行格式查询的参数超过100个

1 个答案: