after review fixup (bug #8129: help.test fails using --ps-protocol)
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@ -558,6 +558,10 @@ SQL_SELECT *prepare_simple_select(THD *thd, Item *cond, TABLE_LIST *tables,
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{
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if (!cond->fixed)
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cond->fix_fields(thd, tables, &cond); // can never fail
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/* Assume that no indexes cover all required fields */
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table->used_keys.clear_all();
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SQL_SELECT *res= make_select(table,0,0,cond,error);
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if (*error || (res && res->check_quick(thd, 0, HA_POS_ERROR)) ||
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(res->quick && res->quick->reset()))
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