SERVER-19510 Move text query parsing to TextMatchExpression::init()

- Introduces FTSQuery, which is now the base class for FTSQueryImpl.
- Introduces a derived class FTSQueryNoop (which
  TextNoOpMatchExpression now wraps).  libfts_query_noop is now linked
  into db/matcher/expressions.
- TextMatchExpression now parses the text query (which acquires a
  collection lock as part of the parsing process), and TextNode now
  stores a parsed version of the query.  The FTSQuery::parse() call in
  buildStages() is removed.

Behavior change: $text against a non-existent collection now returns
an error, instead of an empty result set.

1 files changed, 2 insertions, 7 deletions

diff --git a/src/mongo/db/query/query_solution.h b/src/mongo/db/query/query_solution.h
index e3fd9d9dd3c..4df3e3e8665 100644
--- a/src/mongo/db/query/query_solution.h
+++ b/src/mongo/db/query/query_solution.h
@@ -32,15 +32,13 @@
 
 #include "mongo/db/jsobj.h"
 #include "mongo/db/matcher/expression.h"
-#include "mongo/db/fts/fts_query_impl.h"
+#include "mongo/db/fts/fts_query.h"
 #include "mongo/db/query/index_bounds.h"
 #include "mongo/db/query/plan_cache.h"
 #include "mongo/db/query/stage_types.h"
 
 namespace mongo {
 
-using mongo::fts::FTSQueryImpl;
-
 class GeoNearExpression;
 
 /**
@@ -247,10 +245,7 @@ struct TextNode : public QuerySolutionNode {
     BSONObjSet _sort;
 
     BSONObj indexKeyPattern;
-    std::string query;
-    std::string language;
-    bool caseSensitive;
-    bool diacriticSensitive;
+    std::unique_ptr<fts::FTSQuery> ftsQuery;
 
     // "Prefix" fields of a text index can handle equality predicates.  We group them with the
     // text node while creating the text leaf node and convert them into a BSONObj index prefix