From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Ron Johnson <ronljohnsonjr(at)gmail(dot)com> |
Cc: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: |
Date: | 2024-01-25 17:29:43 |
Message-ID: | 413806.1706203783@sss.pgh.pa.us |
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Lists: | pgsql-general |
Ron Johnson <ronljohnsonjr(at)gmail(dot)com> writes:
> EXPLAIN SELECT works inside a FOR loop, but only the first line of the
> EXPLAIN output is stored. What's the magic sauce for seeing the whole
> EXPLAIN output?
The usual way is to run a FOR loop over the lines of output.
Quick & dirty example:
regression=# do $$
declare ln text;
begin
for ln in explain select * from int8_tbl join int4_tbl on q1=f1 loop
raise notice '%', ln;
end loop;
end $$;
NOTICE: Hash Join (cost=1.11..2.23 rows=5 width=20)
NOTICE: Hash Cond: (int8_tbl.q1 = int4_tbl.f1)
NOTICE: -> Seq Scan on int8_tbl (cost=0.00..1.05 rows=5 width=16)
NOTICE: -> Hash (cost=1.05..1.05 rows=5 width=4)
NOTICE: -> Seq Scan on int4_tbl (cost=0.00..1.05 rows=5 width=4)
DO
regards, tom lane
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