Windows : fix compile warnings C4267, on 32bit first

cmake/os/Windows.cmake

@@ -140,8 +140,11 @@ IF(MSVC)
   
   #TODO: update the code and remove the disabled warnings
   SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4805 /wd4996 /we4700 /we4311 /we4477 /we4302 /we4090")
-  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4805 /wd4996 /wd4291 /wd4577 /we4099 /we4700 /we4311 /we4477 /we4302 /we4090 /wd4267")
-
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4805 /wd4291 /wd4996 /we4099 /we4700 /we4311 /we4477 /we4302 /we4090")
+  IF(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # Temporarily disable size_t warnings, due to their amount
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4267")
+  ENDIF()
   IF(MYSQL_MAINTAINER_MODE MATCHES "ERR")
     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /WX")
     SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /WX")

sql/create_options.cc

@@ -613,7 +613,8 @@ uchar *engine_option_value::frm_image(uchar *buff)
 {
   if (value.str)
   {
-    *buff++= name.length;
+    DBUG_ASSERT(name.length <= 0xff);
+    *buff++= (uchar)name.length;
     memcpy(buff, name.str, name.length);
     buff+= name.length;
     int2store(buff, value.length | (quoted_value ? FRM_QUOTED_VALUE : 0));

sql/log_event.cc

@@ -11791,7 +11791,8 @@ int Table_map_log_event::rewrite_db(const char* new_db, size_t new_len,
   cnt += header_len;
 
   // Write new db name length and new name
-  *ptr++ = new_len;
+  DBUG_ASSERT(new_len < 0xff);
+  *ptr++ = (char)new_len;
   memcpy(ptr, new_db, new_len + 1);
   ptr += new_len + 1;
   cnt += m_dblen + 2;

sql/sql_acl.cc

@@ -3007,7 +3007,8 @@ exit:
       (entry= (acl_entry*) malloc(sizeof(acl_entry)+key_length)))
   {
     entry->access=(db_access & host_access);
-    entry->length=key_length;
+    DBUG_ASSERT(key_length < 0xffff);
+    entry->length=(uint16)key_length;
     memcpy((uchar*) entry->key,key,key_length);
     acl_cache->add(entry);
   }

storage/connect/odbconn.cpp

@@ -2250,10 +2250,10 @@ public:
     return (SQLCHAR *) (m_part[i].length ? m_part[i].str : NULL);
   } // end of ptr
 
-  size_t length(uint i)
+  SQLSMALLINT length(uint i)
   {
     DBUG_ASSERT(i < max_parts);
-    return m_part[i].length;
+    return (SQLSMALLINT)m_part[i].length;
   } // end of length
 
 }; // end of class SQLQualifiedName