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  • Committer: Brian Aker
  • Date: 2009-02-08 03:02:04 UTC
  • Revision ID: brian@tangent.org-20090208030204-3gz6xwcq5niux5nm
Class rewrite of Session (aka get all of the junk out)

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drizzled/table.cc
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#define RATIO_TO_PACK_ROWS             2
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Table *
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create_tmp_table(Session *session,TMP_TABLE_PARAM *param,List<Item> &fields,
 
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create_tmp_table(Session *session,Tmp_Table_Param *param,List<Item> &fields,
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                 order_st *group, bool distinct, bool save_sum_fields,
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                 uint64_t select_options, ha_rows rows_limit,
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                 char *table_alias)
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    When loose index scan is employed as access method, it already
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    computes all groups and the result of all aggregate functions. We
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    make space for the items of the aggregate function in the list of
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    functions TMP_TABLE_PARAM::items_to_copy, so that the values of
 
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    functions Tmp_Table_Param::items_to_copy, so that the values of
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    these items are stored in the temporary table.
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  */
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  if (param->precomputed_group_by)
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      bitmap_lock_clear_bit(&temp_pool, temp_pool_slot);
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    return(NULL);                               /* purecov: inspected */
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  }
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  /* Copy_field belongs to TMP_TABLE_PARAM, allocate it in Session mem_root */
 
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  /* Copy_field belongs to Tmp_Table_Param, allocate it in Session mem_root */
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  if (!(param->copy_field= copy= new (session->mem_root) Copy_field[field_count]))
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  {
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    if (temp_pool_slot != MY_BIT_NONE)