throw a better error message for row size errors. addresses #1766

git-svn-id: file:///svn/toku/tokudb@12659 c7de825b-a66e-492c-adef-691d508d4ae1

src/ydb.c

@@ -3115,11 +3115,13 @@ db_put_check_size_constraints(DB *db, DBT *key, DBT *val) {
     if (dupsort) {
         limit = nodesize / BRT_FANOUT;
         if (key->size + val->size > limit)
-            r = toku_ydb_do_error(db->dbenv, EINVAL, "The largest (key + val) item allowed is %u bytes", limit-1);
+            r = toku_ydb_do_error(db->dbenv, EINVAL, "The largest row (key + val) allowed is %u bytes", limit);
     } else {
         limit = nodesize / BRT_FANOUT;
-        if (key->size > limit || val->size > nodesize)
-            r = toku_ydb_do_error(db->dbenv, EINVAL, "The largest key or val item allowed is %u bytes", limit-1);
+        if (key->size > limit)
+            r = toku_ydb_do_error(db->dbenv, EINVAL, "The largest key allowed is %u bytes", limit);
+        else if (val->size > nodesize)
+            r = toku_ydb_do_error(db->dbenv, EINVAL, "The largest value allowed is %u bytes", nodesize);
     }
     return r;
 }