|
| 1 | +############################################################################### |
| 2 | +# Test of proper transaction isolation. |
| 3 | +# Based on Martin Kleppmann's set of tests (https://github.com/ept/hermitage) |
| 4 | +############################################################################### |
| 5 | + |
| 6 | +use strict; |
| 7 | +use warnings; |
| 8 | +use PostgresNode; |
| 9 | +use TestLib; |
| 10 | +use Test::Moretests=> 2; |
| 11 | +use DBI(); |
| 12 | +use DBD::Pg(); |
| 13 | + |
| 14 | +subquery_row |
| 15 | +{ |
| 16 | +my ($dbi,$sql,@keys) =@_; |
| 17 | +my$sth =$dbi->prepare($sql) ||die; |
| 18 | +$sth->execute(@keys) ||die; |
| 19 | +my$ret =$sth->fetchrow_array; |
| 20 | +print"query_row('$sql') ->$ret\n"; |
| 21 | +return$ret; |
| 22 | +} |
| 23 | + |
| 24 | +subquery_exec |
| 25 | +{ |
| 26 | +my ($dbi,$sql) =@_; |
| 27 | +print"query_exec('$sql')\n"; |
| 28 | +my$rv =$dbi->do($sql) ||die; |
| 29 | +return$rv; |
| 30 | +} |
| 31 | + |
| 32 | +subPostgresNode::psql_ok { |
| 33 | +my ($self,$sql,$comment) =@_; |
| 34 | + |
| 35 | +$self->command_ok(['psql','-A','-t','--no-psqlrc', |
| 36 | +'-d',$self->connstr,'-c',$sql],$comment); |
| 37 | +} |
| 38 | + |
| 39 | +subPostgresNode::psql_fails { |
| 40 | +my ($self,$sql,$comment) =@_; |
| 41 | + |
| 42 | +$self->command_ok(['psql','-A','-t','--no-psqlrc', |
| 43 | +'-d',$self->connstr,'-c',$sql],$comment); |
| 44 | +} |
| 45 | + |
| 46 | +############################################################################### |
| 47 | +# Setup nodes |
| 48 | +############################################################################### |
| 49 | + |
| 50 | +# Setup first node |
| 51 | +my$node1 = get_new_node("node1"); |
| 52 | +$node1->init; |
| 53 | +$node1->append_conf('postgresql.conf',qq( |
| 54 | +max_prepared_transactions = 10 |
| 55 | +shared_preload_libraries = 'pg_tsdtm' |
| 56 | +)); |
| 57 | +$node1->start; |
| 58 | + |
| 59 | +# Setup second node |
| 60 | +my$node2 = get_new_node("node2"); |
| 61 | +$node2->init; |
| 62 | +$node2->append_conf('postgresql.conf',qq( |
| 63 | +max_prepared_transactions = 10 |
| 64 | +shared_preload_libraries = 'pg_tsdtm' |
| 65 | +)); |
| 66 | +$node2->start; |
| 67 | + |
| 68 | +$node1->psql('postgres',"create extension pg_tsdtm;"); |
| 69 | +$node1->psql('postgres',"create table t(u int primary key, v int)"); |
| 70 | +$node1->psql('postgres',"insert into t (select generate_series(0, 9), 0)"); |
| 71 | + |
| 72 | +$node2->psql('postgres',"create extension pg_tsdtm;"); |
| 73 | +$node2->psql('postgres',"create table t(u int primary key, v int)"); |
| 74 | +$node2->psql('postgres',"insert into t (select generate_series(0, 9), 0)"); |
| 75 | + |
| 76 | +my$conn1 = DBI->connect('DBI:Pg:' .$node1->connstr('postgres')); |
| 77 | +my$conn2 = DBI->connect('DBI:Pg:' .$node2->connstr('postgres')); |
| 78 | + |
| 79 | +subcount_total |
| 80 | +{ |
| 81 | +# my ($c1, $c2) = @_; |
| 82 | +my$c1 = DBI->connect('DBI:Pg:' .$node1->connstr('postgres')); |
| 83 | +my$c2 = DBI->connect('DBI:Pg:' .$node2->connstr('postgres')); |
| 84 | + |
| 85 | +query_exec($c1,"begin"); |
| 86 | +query_exec($c2,"begin"); |
| 87 | + |
| 88 | +my$snapshot = query_row($c1,"select dtm_extend()"); |
| 89 | +query_row($c2,"select dtm_access($snapshot)"); |
| 90 | + |
| 91 | +my$sum1 = query_row($c1,"select sum(v) from t"); |
| 92 | +my$sum2 = query_row($c2,"select sum(v) from t"); |
| 93 | + |
| 94 | +query_exec($c1,"commit"); |
| 95 | +query_exec($c2,"commit"); |
| 96 | + |
| 97 | +my$tot =$sum1 +$sum2; |
| 98 | + |
| 99 | +print"total =$tot\n"; |
| 100 | +return$tot; |
| 101 | +} |
| 102 | + |
| 103 | +############################################################################### |
| 104 | +# Check for dirty reads |
| 105 | +############################################################################### |
| 106 | + |
| 107 | +my$gtid ="tx1"; |
| 108 | + |
| 109 | +query_exec($conn1,"begin transaction"); |
| 110 | +query_exec($conn2,"begin transaction"); |
| 111 | +my$snapshot = query_row($conn1,"select dtm_extend('$gtid')"); |
| 112 | +query_exec($conn2,"select dtm_access($snapshot, '$gtid')"); |
| 113 | +query_exec($conn1,"update t set v = v - 10 where u=1"); |
| 114 | + |
| 115 | +my$intermediate_total = count_total(); |
| 116 | + |
| 117 | +query_exec($conn2,"update t set v = v + 10 where u=2"); |
| 118 | +query_exec($conn1,"prepare transaction '$gtid'"); |
| 119 | +query_exec($conn2,"prepare transaction '$gtid'"); |
| 120 | +query_exec($conn1,"select dtm_begin_prepare('$gtid')"); |
| 121 | +query_exec($conn2,"select dtm_begin_prepare('$gtid')"); |
| 122 | +my$csn = query_row($conn1,"select dtm_prepare('$gtid', 0)"); |
| 123 | +query_exec($conn2,"select dtm_prepare('$gtid',$csn)"); |
| 124 | +query_exec($conn1,"select dtm_end_prepare('$gtid',$csn)"); |
| 125 | +query_exec($conn2,"select dtm_end_prepare('$gtid',$csn)"); |
| 126 | +query_exec($conn1,"commit prepared '$gtid'"); |
| 127 | +query_exec($conn2,"commit prepared '$gtid'"); |
| 128 | + |
| 129 | +is($intermediate_total, 0,"Check for absence of dirty reads"); |
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