postgresql中，将字符串'1|23|456'按'|'拆分为3行ACDE 1 23 456 以下哪些选项是可行的？ A select split_part('1|23|456','|',i+1) from generate_series(0,length('1|23|456')-length(replace('1|23|456','|',''))) as i; B select unnest(string_to_array('1|23|456','\|')); C select unnest(regexp_split_to_array('1|23|456','\|')); D select unnest(regexp_matches('1|23|456','\d+','g')) ; E select regexp_split_to_table('1|23|456','\|');