after review fixup (bug #8129: help.test fails using --ps-protocol)

662823c2 · unknown · 54a1e372 · 662823c2
Commit 662823c2 authored Jan 26, 2005 by unknown
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sql/sql_help.cc sql/sql_help.cc +4 -0

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--- a/sql/sql_help.cc
+++ b/sql/sql_help.cc
@@ -558,6 +558,10 @@ SQL_SELECT *prepare_simple_select(THD *thd, Item *cond, TABLE_LIST *tables,
 {
  if (!cond->fixed)
    cond->fix_fields(thd, tables, &cond);	// can never fail
+
+  /* Assume that no indexes cover all required fields */
+  table->used_keys.clear_all();
+
  SQL_SELECT *res= make_select(table,0,0,cond,error);
  if (*error || (res && res->check_quick(thd, 0, HA_POS_ERROR)) ||
      (res->quick && res->quick->reset()))