Add test for session_preload_libraries and parameter permissions checks.
We weren't exercising the session_preload_libraries option in any meaningful way. auto_explain is a good testbed for doing so, since it's one of the primary use-cases for session_preload_libraries. Hence, adjust its TAP test to load the library via session_preload_libraries not shared_preload_libraries. While at it, feed test-specific settings to the backend via PGOPTIONS rather than tediously rewriting postgresql.conf. Also, since auto_explain has some PGC_SUSET parameters, we can use it to provide a test case for the permissions-checking bug just fixed by commitb35617de3
. Back-patch to v15 so that we have coverage for the permissions issue in that branch too. To do that, I back-patched the refactoring recently done by commit550bc0a6c
. Dagfinn Ilmari Mannsåker and Tom Lane Discussion: https://postgr.es/m/CABwTF4VEpwTHhRQ+q5MiC5ucngN-whN-PdcKeufX7eLSoAfbZA@mail.gmail.com
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@ -9,45 +9,28 @@ use PostgreSQL::Test::Utils;
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use Test::More;
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# Runs the specified query and returns the emitted server log.
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# If any parameters are specified, these are set in postgresql.conf,
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# and reset after the query is run.
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# params is an optional hash mapping GUC names to values;
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# any such settings are transmitted to the backend via PGOPTIONS.
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sub query_log
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{
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my ($node, $sql, $params) = @_;
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$params ||= {};
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if (keys %$params)
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{
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for my $key (keys %$params)
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{
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$node->append_conf('postgresql.conf', "$key = $params->{$key}\n");
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}
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$node->reload;
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}
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local $ENV{PGOPTIONS} = join " ",
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map { "-c $_=$params->{$_}" } keys %$params;
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my $log = $node->logfile();
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my $offset = -s $log;
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$node->safe_psql("postgres", $sql);
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my $log_contents = slurp_file($log, $offset);
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if (keys %$params)
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{
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for my $key (keys %$params)
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{
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$node->adjust_conf('postgresql.conf', $key, undef);
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}
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$node->reload;
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}
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return $log_contents;
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return slurp_file($log, $offset);
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}
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my $node = PostgreSQL::Test::Cluster->new('main');
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$node->init;
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$node->append_conf('postgresql.conf',
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"shared_preload_libraries = 'auto_explain'");
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"session_preload_libraries = 'auto_explain'");
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$node->append_conf('postgresql.conf', "auto_explain.log_min_duration = 0");
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$node->append_conf('postgresql.conf', "auto_explain.log_analyze = on");
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$node->start;
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@ -126,12 +109,12 @@ unlike(
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# JSON format.
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$log_contents = query_log(
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$node,
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"SELECT * FROM pg_proc;",
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"SELECT * FROM pg_class;",
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{ "auto_explain.log_format" => "json" });
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like(
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$log_contents,
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qr/"Query Text": "SELECT \* FROM pg_proc;"/,
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qr/"Query Text": "SELECT \* FROM pg_class;"/,
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"query text logged, json mode");
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unlike(
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@ -141,7 +124,7 @@ unlike(
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like(
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$log_contents,
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qr/"Node Type": "Seq Scan"[^}]*"Relation Name": "pg_proc"/s,
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qr/"Node Type": "Seq Scan"[^}]*"Relation Name": "pg_class"/s,
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"sequential scan logged, json mode");
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# Prepared query in JSON format.
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@ -160,4 +143,43 @@ like(
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qr/"Node Type": "Index Scan"[^}]*"Index Name": "pg_class_relname_nsp_index"/s,
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"index scan logged, json mode");
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# Check that PGC_SUSET parameters can be set by non-superuser if granted,
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# otherwise not
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$node->safe_psql(
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"postgres", q{
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CREATE USER regress_user1;
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GRANT SET ON PARAMETER auto_explain.log_format TO regress_user1;
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});
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$ENV{PGUSER} = "regress_user1";
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$log_contents = query_log(
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$node,
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"SELECT * FROM pg_database;",
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{ "auto_explain.log_format" => "json" });
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like(
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$log_contents,
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qr/"Query Text": "SELECT \* FROM pg_database;"/,
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"query text logged, json mode selected by non-superuser");
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$log_contents = query_log(
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$node,
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"SELECT * FROM pg_database;",
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{ "auto_explain.log_level" => "log" });
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like(
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$log_contents,
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qr/WARNING: permission denied to set parameter "auto_explain\.log_level"/,
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"permission failure logged");
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$ENV{PGUSER} = undef;
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$node->safe_psql(
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"postgres", q{
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REVOKE SET ON PARAMETER auto_explain.log_format FROM regress_user1;
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DROP USER regress_user1;
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});
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done_testing();
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