Documentation.

h2/src/docsrc/help/help.csv

@@ -1177,8 +1177,9 @@ SET MAX_MEMORY_ROWS 1000
 SET MAX_MEMORY_UNDO int
 ","
 The maximum number of undo records per a session that are kept in-memory. If a
-transaction is larger, the records are buffered to disk. The default value is
-50000. Changes to tables without a primary key can not be buffered to disk.
+transaction is larger, the records are buffered to disk. 
+The default value is 50000. 
+Changes to tables without a primary key can not be buffered to disk.
 This setting is not supported when using multi-version concurrency.
 
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h2/src/docsrc/html/roadmap.html

@@ -27,6 +27,9 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
 </li><li>Set h2.analyzeAuto to 2000 (automatic ANALYZE).
 </li><li>Enable h2.functionsInSchema (allow to store functions in a schema).
 </li><li>Enable h2.selectForUpdateMvcc (MVCC and SELECT FOR UPDATE).
+</li><li>Enable h2.largeTransactions (support for very large transactions).
+    Change documentation for MAX_MEMORY_UNDO in help.csv, because
+    now changes to tables without a primary key can be buffered to disk.
 </li></ul>
 
 <h2>Priority 1</h2>
@@ -38,10 +41,10 @@ See also <a href="build.html#providing_patches">Providing Patches</a>.
 </li></ul>
 
 <h2>Priority 2</h2>
-<ul><li>Improve test code coverage.
+<ul><li>Support nested outer joins (see todo.txt, issues 145, 177, 203).
+</li><li>Improve test code coverage.
 </li><li>Test multi-threaded in-memory db access.
 </li><li>Full outer joins.
-</li><li>Support nested outer joins (see todo.txt).
 </li><li>Clustering: support mixed clustering mode (one embedded, others in server mode).
 </li><li>Clustering: reads should be randomly distributed (optional) or to a designated database on RAM (parameter: READ_FROM=3).
 </li><li>PostgreSQL catalog: use BEFORE SELECT triggers instead of views over metadata tables.

h2/src/test/org/h2/test/TestAll.java

@@ -297,6 +297,7 @@ java org.h2.test.TestAll timer
         test.printSystem();
         System.setProperty("h2.maxMemoryRowsDistinct", "128");
         System.setProperty("h2.check2", "true");
+        System.setProperty("h2.largeTransactions", "true");
 
         // System.setProperty("h2.lobInDatabase", "true");
         // System.setProperty("h2.analyzeAuto", "100");

h2/src/test/org/h2/test/todo/todo.txt

@@ -28,6 +28,67 @@ TableFilter,
         }
     }
     
+    
+drop table base; 
+drop table a; 
+drop table b; 
+create table a( pk integer, val varchar(255) );
+create table b( pk integer, val varchar(255) );
+create table base( pk integer, deleted integer );
+insert into base values ( 1,  0 ); 
+insert into base values ( 2,  1 ); 
+insert into base values ( 3,  0 ); 
+insert into a values  ( 1, 'a' ); 
+insert into b values ( 2, 'a' ); 
+insert into b values ( 3, 'a' ); 
+
+select a.pk, a_base.pk, b.pk, b_base.pk from a inner join base a_base 
+on a.pk = a_base.pk left outer join
+( b inner join base b_base on b.pk = b_base.pk and b_base.deleted = 0 ) ;
+-- H2:
+-- 1    1   2   null
+-- 1    1   3   3
+-- PostgreSQL: ERROR: syntax error at end of input 42601/0
+-- MySQL: You have an error in your SQL syntax; 
+--       check the manual that corresponds to your MySQL server version 
+--       for the right syntax to use near '' at line 3
+-- Derby: Syntax error: Encountered "<EOF>" at line 3, column 71. 42X01/30000
+-- HSQLDB: Unexpected token B, requires SELECT in statement
+
+select a.pk, a_base.pk, b.pk, b_base.pk  from a inner join base a_base 
+on a.pk = a_base.pk left outer join
+( b inner join base b_base on b.pk = b_base.pk and b_base.deleted = 0 ) 
+on a.pk = b.pk;
+-- H2, MySQL, PostgreSQL, Derby:
+-- 1    1   null    null
+-- HSQLDB: Unexpected token B, requires SELECT in statement
+
+select a.pk, a_base.pk, b.pk, b_base.pk  from a inner join base a_base 
+on a.pk = a_base.pk left outer join
+( b inner join base b_base on b.pk = b_base.pk and b_base.deleted = 0 ) 
+on 1=1;
+-- H2:
+-- 1    1   2   null
+-- 1    1   3   3
+-- PostgreSQL, MySQL, Derby:
+-- 1    1   3   3
+-- HSQLDB: Unexpected token B, requires SELECT in statement
+
+select a.pk, a_base.pk, bpk, bbasepk  from a inner join base a_base 
+on a.pk = a_base.pk left outer join
+( select b.pk bpk, b_base.pk bbasepk from b inner join base b_base on b.pk = b_base.pk and b_base.deleted = 0 ) x
+on 1=1;
+-- PostgreSQL, MySQL, Derby, H2:
+-- 1    1   3   3
+
+
+drop table test;
+create table test(id int primary key);
+@loop 3 insert into test values(?);
+select * from test a left outer join (test b inner join test c on b.id = c.id - 2) on a.id = b.id + 1;
+select * from test a left outer join (select b.id, c.id from test b inner join test c on b.id = c.id - 2) on a.id = b.id + 1;
+    
+
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