cleanup: remove Type_collection::handler_by_name()

it's a hard-coded geometry-specific method, move it into
geometry-specific function. Will go away in the future.

plugin/type_mysql_json/type.cc

@@ -176,13 +176,6 @@ public:
   {
     return NULL;
   }
-
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    if (type_handler_mysql_json.name().eq(name))
-      return &type_handler_mysql_json;
-    return NULL;
-  }
 };
 
 const Type_collection *Type_handler_mysql_json::type_collection() const

plugin/type_mysql_timestamp/plugin.cc

@@ -31,11 +31,6 @@ protected:
     return NULL;
   }
 public:
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    return NULL;
-  }
-
   const Type_handler *aggregate_for_result(const Type_handler *h1,
                                            const Type_handler *h2)
                                            const override

plugin/type_test/plugin.cc

@@ -26,10 +26,6 @@ protected:
   const Type_handler *aggregate_common(const Type_handler *h1,
                                        const Type_handler *h2) const;
 public:
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    return NULL;
-  }
   const Type_handler *aggregate_for_result(const Type_handler *h1,
                                            const Type_handler *h2)
                                            const override;

sql/sql_type.cc

@@ -94,10 +94,6 @@ Vers_type_trx             vers_type_trx;
 class Type_collection_std: public Type_collection
 {
 public:
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    return NULL;
-  }
   const Type_handler *aggregate_for_result(const Type_handler *a,
                                            const Type_handler *b)
                                            const override
@@ -137,10 +133,6 @@ public:
   {
     return false;
   }
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    return NULL;
-  }
   const Type_handler *aggregate_for_result(const Type_handler *a,
                                            const Type_handler *b)
                                            const override
@@ -212,7 +204,7 @@ Type_handler::handler_by_name(THD *thd, const LEX_CSTRING &name)
   }
 
 #ifdef HAVE_SPATIAL
-  const Type_handler *ha= type_collection_geometry.handler_by_name(name);
+  const Type_handler *ha= Type_collection_geometry_handler_by_name(name);
   if (ha)
     return ha;
 #endif

sql/sql_type.h

@@ -7415,7 +7415,6 @@ class Type_collection
 public:
   virtual ~Type_collection() = default;
   virtual bool init(Type_handler_data *) { return false; }
-  virtual const Type_handler *handler_by_name(const LEX_CSTRING &name) const= 0;
   virtual const Type_handler *aggregate_for_result(const Type_handler *h1,
                                                    const Type_handler *h2)
                                                    const= 0;

sql/sql_type_fixedbin.h

@@ -1892,13 +1892,6 @@ public:
     {
       return NULL;
     }
-
-    const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-    {
-      if (type_handler_fbt()->name().eq(name))
-        return type_handler_fbt();
-      return NULL;
-    }
   };
   static Type_handler_fbt *type_handler_fbt()
   {

sql/sql_type_geom.cc

@@ -67,7 +67,7 @@ Type_handler_geometry::type_handler_geom_by_type(uint type)
 
 
 const Type_handler *
-Type_collection_geometry::handler_by_name(const LEX_CSTRING &name) const
+Type_collection_geometry_handler_by_name(const LEX_CSTRING &name)
 {
   if (type_handler_point.name().eq(name))
     return &type_handler_point;

sql/sql_type_geom.h

@@ -297,7 +297,6 @@ class Type_collection_geometry: public Type_collection
 #endif
 public:
   bool init(Type_handler_data *data) override;
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override;
   const Type_handler *aggregate_for_result(const Type_handler *a,
                                            const Type_handler *b)
                                            const override;
@@ -316,6 +315,8 @@ public:
 };
 
 extern Type_collection_geometry type_collection_geometry;
+const Type_handler *
+Type_collection_geometry_handler_by_name(const LEX_CSTRING &name);
 
 #include "field.h"
 

sql/sql_type_json.cc

@@ -233,20 +233,6 @@ public:
     */
     return NULL;
   }
-
-  const Type_handler *handler_by_name(const LEX_CSTRING &name) const override
-  {
-    /*
-      Name resolution is not needed yet.
-      JSON is not fully pluggable at the moment:
-      - It is parsed using a hard-coded rule in sql_yacc.yy
-      - It does not store extended data type information into
-        FRM file yet. JSON is detected by CHECK(JSON_VALID(col))
-        and this detection is also hard-coded.
-      This will change in the future.
-    */
-    return NULL;
-  }
 };