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Improve display of query results in isolation tests.

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Previously, isolationtester displayed SQL query results using some
ad-hoc code that clearly hadn't had much effort expended on it.
Field values longer than 14 characters weren't separated from
the next field, and usually caused misalignment of the columns
too.  Also there was no visual separation of a query's result
from subsequent isolationtester output.  This made test result
files confusing and hard to read.

To improve matters, let's use libpq's PQprint() function.  Although
that's long since unused by psql, it's still plenty good enough
for the purpose here.

Like 741d7f104, back-patch to all supported branches, so that this
isn't a stumbling block for back-patching isolation test changes.

Discussion: https://postgr.es/m/582362.1623798221@sss.pgh.pa.us
This commit is contained in:
Tom Lane
2021-06-23 11:12:31 -04:00
parent 24043c27b4
commit 4a054069a3
104 changed files with 33226 additions and 13736 deletions
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16
contrib/test_decoding/expected/concurrent_stream.out
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@ -9,12 +9,16 @@ step s1_toast_insert: INSERT INTO stream_test SELECT large_val();
step s2_ddl: CREATE TABLE stream_test2(data text);
step s1_commit: COMMIT;
step s1_get_stream_changes: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL,NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'stream-changes', '1');
data
data
----------------------------------------
opening a streamed block for transaction
streaming change for transaction
streaming change for transaction
closing a streamed block for transaction
committing streamed transaction
?column?
committing streamed transaction
(4 rows)
?column?
--------
stop
(1 row)
stop