Upgraded sphinx to version 2.0.4

Fixed memory leaks and compiler warnings in ha_sphinx.cc
Added HA_MUST_USE_TABLE_CONDITION_PUSHDOWN so that an engine can force index condition to be used

mysql-test/suite/sphinx/sphinx.result:
  Added testing of pushdown conditions and sphinx status variables.
mysql-test/suite/sphinx/sphinx.test:
  Added testing of pushdown conditions and sphinx status variables.
mysql-test/suite/sphinx/suite.pm:
  Print version number if sphinx version is too old.
sql/handler.h:
  Added HA_MUST_USE_TABLE_CONDITION_PUSHDOWN so that an engine can force index condition to be used
sql/sql_base.cc:
  Added 'thd' argument to check_unused() to be able to set 'entry->in_use' if we call handler->extra().
  This was needed as sphinx (and possible other storage engines) assumes that 'in_use' is set if handler functions are called.
sql/sql_select.cc:
  Test if handler is forcing pushdown condition to be used.
storage/sphinx/ha_sphinx.cc:
  Updated to version 2.0.4
  Fixed memory leaks and compiler warnings.
storage/sphinx/ha_sphinx.h:
  Updated to version 2.0.4
storage/sphinx/snippets_udf.cc:
  Updated to version 2.0.4

1 files changed, 13 insertions, 0 deletions

diff --git a/sql/handler.h b/sql/handler.h
index 0ff1a8db01d..d56e3242ddd 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -176,6 +176,19 @@
 #define HA_RECORD_MUST_BE_CLEAN_ON_WRITE (LL(1) << 41)
 
 /*
+  Table condition pushdown must be performed regardless of
+  'engine_condition_pushdown' setting.
+
+  This flag is aimed at storage engines that come with "special" predicates
+  that can only be evaluated inside the storage engine.  
+  For example, when one does 
+    select * from sphinx_table where query='{fulltext_query}'
+  then the "query=..." condition must be always pushed down into storage
+  engine.
+*/
+#define HA_MUST_USE_TABLE_CONDITION_PUSHDOWN (LL(1) << 42)
+
+/*
   Set of all binlog flags. Currently only contain the capabilities
   flags.
  */