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Viewing changes to drizzled/sql_select.cc

  • Committer: Brian Aker
  • Date: 2009-07-11 19:23:04 UTC
  • mfrom: (1089.1.14 merge)
  • Revision ID: brian@gaz-20090711192304-ootijyl5yf9jq9kd
Merge Brian

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drizzled/sql_select.cc
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      1. update_ref_and_keys() accumulates info about null-rejecting
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         predicates in in KEY_FIELD::null_rejecting
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      1.1 add_key_part saves these to KeyUse.
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      2. create_ref_for_key copies them to TABLE_REF.
 
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      2. create_ref_for_key copies them to table_reference_st.
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      3. add_not_null_conds adds "x IS NOT NULL" to join_tab->select_cond of
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         appropiate JoinTable members.
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*/
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  @return
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    return one of enum_nested_loop_state, except NESTED_LOOP_NO_MORE_ROWS.
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*/
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enum_nested_loop_state sub_select(JOIN *join,JoinTable *join_tab,bool end_of_records)
 
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enum_nested_loop_state sub_select(JOIN *join, JoinTable *join_tab, bool end_of_records)
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{
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  join_tab->table->null_row=0;
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  if (end_of_records)
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  if (join_tab->flush_weedout_table)
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  {
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    do_sj_reset(join_tab->flush_weedout_table);
 
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    join_tab->flush_weedout_table->reset();
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  }
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  if (join->resume_nested_loop)
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  return rc;
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}
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/*
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  SemiJoinDuplicateElimination: Reset the temporary table
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*/
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int do_sj_reset(SemiJoinTable *sj_tbl)
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{
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  if (sj_tbl->tmp_table)
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    return sj_tbl->tmp_table->file->ha_delete_all_rows();
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  return 0;
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}
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int safe_index_read(JoinTable *tab)
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{
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  int error;
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  return(sort);
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}
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void read_cached_record(JoinTable *tab)
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{
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  unsigned char *pos;
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  uint32_t length;
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  bool last_record;
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  CACHE_FIELD *copy,*end_field;
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  last_record= tab->cache.record_nr++ == tab->cache.ptr_record;
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  pos= tab->cache.pos;
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  for (copy= tab->cache.field, end_field= copy+tab->cache.fields;
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       copy < end_field;
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       copy++)
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  {
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    if (copy->blob_field)
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    {
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      if (last_record)
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      {
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        copy->blob_field->set_image(pos, copy->length+sizeof(char*),
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                  copy->blob_field->charset());
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        pos+=copy->length+sizeof(char*);
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      }
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      else
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      {
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        copy->blob_field->set_ptr(pos, pos+copy->length);
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        pos+=copy->length+copy->blob_field->get_length();
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      }
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    }
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    else
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    {
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      if (copy->strip)
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      {
6757
 
        length= uint2korr(pos);
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        memcpy(copy->str, pos+2, length);
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        memset(copy->str+length, ' ', copy->length-length);
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        pos+= 2 + length;
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      }
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      else
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      {
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        memcpy(copy->str,pos,copy->length);
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        pos+=copy->length;
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      }
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    }
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  }
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  tab->cache.pos=pos;
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  return;
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}
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/*
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  eq_ref: Create the lookup key and check if it is the same as saved key
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    != 0;
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}
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6811
 
bool cp_buffer_from_ref(Session *session, TABLE_REF *ref)
 
6754
bool cp_buffer_from_ref(Session *session, table_reference_st *ref)
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{
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  enum enum_check_fields save_count_cuted_fields= session->count_cuted_fields;
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  session->count_cuted_fields= CHECK_FIELD_IGNORE;