On Sun, Feb 26, 2023 at 9:16 AM jack...@gmail.com <jack...@gmail.com> wrote:
> use these sqls: > create table t(a text); > insert into t values('a'); > select lp,lp_len,t_data from heap_page_items(get_raw_page('t',0)); > lp | lp_len | t_data > ----+--------+-------- > 1 | 26 | \x0561 > as you can see, the 61 is 'a', so what's the 05??? strange. > text is variable length so there is header information built into the datatype representation that indicates how long the content is. David J.