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d4bfe41281
auto_explain.log_parameter_max_length is a new GUC part of the extension, similar to the corresponding core setting, that controls the inclusion of query parameters in the logged explain output. More tests are added to check the behavior of this new parameter: when parameters logged in full (the default of -1), when disabled (value of 0) and when partially truncated (value different than the two others). Author: Dagfinn Ilmari Mannsåker Discussion: https://postgr.es/m/87ee09mohb.fsf@wibble.ilmari.org
164 lines
4.0 KiB
Perl
164 lines
4.0 KiB
Perl
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# Copyright (c) 2021-2022, PostgreSQL Global Development Group
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use strict;
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use warnings;
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use PostgreSQL::Test::Cluster;
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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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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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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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}
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my $node = PostgreSQL::Test::Cluster->new('main');
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$node->init;
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$node->append_conf('postgresql.conf',
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"shared_preload_libraries = 'auto_explain'");
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$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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# Simple query.
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my $log_contents = query_log($node, "SELECT * FROM pg_class;");
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like(
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$log_contents,
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qr/Query Text: SELECT \* FROM pg_class;/,
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"query text logged, text mode");
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unlike(
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$log_contents,
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qr/Query Parameters:/,
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"no query parameters logged when none, text mode");
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like(
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$log_contents,
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qr/Seq Scan on pg_class/,
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"sequential scan logged, text mode");
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# Prepared query.
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$log_contents = query_log($node,
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q{PREPARE get_proc(name) AS SELECT * FROM pg_proc WHERE proname = $1; EXECUTE get_proc('int4pl');}
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);
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like(
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$log_contents,
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qr/Query Text: PREPARE get_proc\(name\) AS SELECT \* FROM pg_proc WHERE proname = \$1;/,
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"prepared query text logged, text mode");
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like(
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$log_contents,
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qr/Query Parameters: \$1 = 'int4pl'/,
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"query parameters logged, text mode");
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like(
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$log_contents,
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qr/Index Scan using pg_proc_proname_args_nsp_index on pg_proc/,
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"index scan logged, text mode");
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# Prepared query with truncated parameters.
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$log_contents = query_log(
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$node,
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q{PREPARE get_type(name) AS SELECT * FROM pg_type WHERE typname = $1; EXECUTE get_type('float8');},
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{ "auto_explain.log_parameter_max_length" => 3 });
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like(
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$log_contents,
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qr/Query Text: PREPARE get_type\(name\) AS SELECT \* FROM pg_type WHERE typname = \$1;/,
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"prepared query text logged, text mode");
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like(
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$log_contents,
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qr/Query Parameters: \$1 = 'flo\.\.\.'/,
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"query parameters truncated, text mode");
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# Prepared query with parameter logging disabled.
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$log_contents = query_log(
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$node,
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q{PREPARE get_type(name) AS SELECT * FROM pg_type WHERE typname = $1; EXECUTE get_type('float8');},
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{ "auto_explain.log_parameter_max_length" => 0 });
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like(
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$log_contents,
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qr/Query Text: PREPARE get_type\(name\) AS SELECT \* FROM pg_type WHERE typname = \$1;/,
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"prepared query text logged, text mode");
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unlike(
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$log_contents,
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qr/Query Parameters:/,
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"query parameters not logged when disabled, text mode");
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# JSON format.
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$log_contents = query_log(
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$node,
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"SELECT * FROM pg_proc;",
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{ "auto_explain.log_format" => "json" });
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like(
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$log_contents,
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qr/"Query Text": "SELECT \* FROM pg_proc;"/,
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"query text logged, json mode");
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unlike(
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$log_contents,
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qr/"Query Parameters":/,
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"query parameters not logged when none, json mode");
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like(
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$log_contents,
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qr/"Node Type": "Seq Scan"[^}]*"Relation Name": "pg_proc"/s,
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"sequential scan logged, json mode");
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# Prepared query in JSON format.
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$log_contents = query_log(
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$node,
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q{PREPARE get_class(name) AS SELECT * FROM pg_class WHERE relname = $1; EXECUTE get_class('pg_class');},
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{ "auto_explain.log_format" => "json" });
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like(
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$log_contents,
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qr/"Query Text": "PREPARE get_class\(name\) AS SELECT \* FROM pg_class WHERE relname = \$1;"/,
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"prepared query text logged, json mode");
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like(
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$log_contents,
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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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done_testing();
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