Merge branch '10.0-galera' into 10.1

1 files changed, 8 insertions, 1 deletions

diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index 1a0d12a8dee..bed57f3273f 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -2757,9 +2757,16 @@ bool create_key_parts_for_pseudo_indexes(RANGE_OPT_PARAM *param,
     {
       Field *field= *field_ptr;
       uint16 store_length;
+      uint16 max_key_part_length= (uint16) table->file->max_key_part_length();
       key_part->key= keys;
       key_part->part= 0;
-      key_part->length= (uint16) field->key_length();
+      if (field->flags & BLOB_FLAG)
+        key_part->length= max_key_part_length;
+      else
+      {
+        key_part->length= (uint16) field->key_length();
+        set_if_smaller(key_part->length, max_key_part_length);
+      }
       store_length= key_part->length;
       if (field->real_maybe_null())
         store_length+= HA_KEY_NULL_LENGTH;