bzr push into mysql-trunk branch (ole.john.aske:3877 to 3878)

[Ole John Aske]

 3878 Ole John Aske	2012-04-18
      Extracted optimizer part of previous fix for:
      
      bug#13901890 SQL NODE CRASHES DURING INSERT SELECT
      
      This has to be added as part of WL#5940 as it extends
      how 'HA_PUSH_BLOCK_CONST_TABLE' prevents JT_EQ_REF
      to be converted into JT_CONST.
      
      Read the commit message for the full fix for
      more comments:
      
      ftp://bugftp.us.oracle.com/upload/bug_13/bug13901890/commit120418%2dI68V%2eeml

    modified:
      sql/abstract_query_plan.cc
      sql/sql_select.cc
 3877 Ole John Aske	2012-03-30
      Patch sets for WL#5940: 'handler extensions for pushed join'
      
      Patches are commited to branch: mysql-trunk-wl5940_2 which are based on
      mysql-trunk, revno 3875
     @ sql/abstract_query_plan.cc
        Add an abstraction layer on top of the Query Execution Plan (QEP)
        in order to make it simpler for non-optimizer modules 
        to extract information from the QEP
     @ sql/abstract_query_plan.h
        Add an abstraction layer on top of the Query Execution Plan (QEP)
        in order to make it simpler for non-optimizer modules 
        to extract information from the QEP
     @ sql/ha_ndbcluster.h
        Remove the temporary declaration of HA_PUSH flags as they are 
        now available from handler.h
     @ sql/handler.cc
        Implements the handlerton extensions required by pushed joins
     @ sql/handler.h
        Defines the handler extensions required by pushed joins
     @ sql/opt_explain.cc
        Add code to produce EXPLAIN text for pushed joins
     @ sql/opt_explain_format.h
        Add ET_PUSHED_JOIN explain.
     @ sql/opt_explain_json.cc
        Add ET_PUSHED_JOIN explain.
     @ sql/opt_explain_traditional.cc
        Add ET_PUSHED_JOIN explain.
     @ sql/sql_executor.cc
        Extends pick_table_access_method() to also set up new access methods 
        used for pushed joins.
        
        Also implements the pushed join access methods join_read_linked_first()
        and join_read_linked_next()
     @ sql/sql_optimizer.cc
        Call handler extensions to build pushed joins if supported.
        Also pick_table_access_method() at end of ::optimize()
     @ sql/sql_select.cc
        pick_table_access_method() is being moved to end of JOIN::optimize().
        Instead of prematurely setting the access methods in make_join_readinfo(),
        and having to maintain/change them during optimize, we defer this
        work until ::optimize() has completed.

    added:
      sql/abstract_query_plan.cc
      sql/abstract_query_plan.h
    modified:
      sql/CMakeLists.txt
      sql/ha_ndbcluster.h
      sql/handler.cc
      sql/handler.h
      sql/opt_explain.cc
      sql/opt_explain_format.h
      sql/opt_explain_json.cc
      sql/opt_explain_traditional.cc
      sql/sql_executor.cc
      sql/sql_optimizer.cc
      sql/sql_select.cc
=== modified file 'sql/abstract_query_plan.cc'
--- a/sql/abstract_query_plan.cc	2012-03-30 06:52:25 +0000
+++ b/sql/abstract_query_plan.cc	2012-04-18 10:46:39 +0000
@@ -322,7 +322,6 @@ namespace AQP
     switch (join_tab->type)
     {
     case JT_EQ_REF:
-    case JT_CONST:
       m_index_no= join_tab->ref.key;
 
       if (m_index_no == static_cast<int>(join_tab->table->s->primary_key))
@@ -446,6 +445,8 @@ namespace AQP
       }
       break;
 
+    case JT_CONST:
+    case JT_SYSTEM:
     default:
       /*
         Other join_types either cannot be pushed or the code analyze them is

=== modified file 'sql/sql_select.cc'
--- a/sql/sql_select.cc	2012-03-30 06:52:25 +0000
+++ b/sql/sql_select.cc	2012-04-18 10:46:39 +0000
@@ -1509,7 +1509,8 @@ bool create_ref_for_key(JOIN *join, JOIN
     j->type= null_ref_key ? JT_REF_OR_NULL : JT_REF;
     j->ref.null_ref_key= null_ref_key;
   }
-  else if (keyuse_uses_no_tables)
+  else if (keyuse_uses_no_tables &&
+           !table->file->test_push_flag(HA_PUSH_BLOCK_CONST_TABLE))
   {
     /*
       This happen if we are using a constant expression in the ON part

No bundle (reason: useless for push emails).