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/* Copyright (C) 2000-2003 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "mysql_priv.h"
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#ifdef HAVE_QUERY_CACHE
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#include "emb_qcache.h"
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#include "embedded_priv.h"
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void Querycache_stream::store_uchar(uchar c)
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if (data_end == cur_data)
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void Querycache_stream::store_short(ushort s)
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if (data_end - cur_data > 1)
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int2store(cur_data, s);
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if (data_end == cur_data)
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int2store(cur_data, s);
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*cur_data= ((uchar *)(&s))[0];
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*(cur_data++)= ((uchar *)(&s))[1];
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void Querycache_stream::store_int(uint i)
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size_t rest_len= data_end - cur_data;
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int4store(cur_data, i);
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int4store(cur_data, i);
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memcpy(cur_data, buf, rest_len);
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memcpy(cur_data, buf+rest_len, 4-rest_len);
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cur_data+= 4-rest_len;
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void Querycache_stream::store_ll(ulonglong ll)
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size_t rest_len= data_end - cur_data;
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int8store(cur_data, ll);
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int8store(cur_data, ll);
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memcpy(cur_data, &ll, rest_len);
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use_next_block(TRUE);
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memcpy(cur_data, ((uchar*)&ll)+rest_len, 8-rest_len);
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cur_data+= 8-rest_len;
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void Querycache_stream::store_str_only(const char *str, uint str_len)
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stored_size+= str_len;
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size_t rest_len= data_end - cur_data;
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if (rest_len >= str_len)
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memcpy(cur_data, str, str_len);
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memcpy(cur_data, str, rest_len);
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use_next_block(TRUE);
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void Querycache_stream::store_str(const char *str, uint str_len)
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store_str_only(str, str_len);
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void Querycache_stream::store_safe_str(const char *str, uint str_len)
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store_int(str_len+1);
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store_str_only(str, str_len);
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uchar Querycache_stream::load_uchar()
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if (cur_data == data_end)
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use_next_block(FALSE);
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return *(cur_data++);
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ushort Querycache_stream::load_short()
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if (data_end-cur_data > 1)
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result= uint2korr(cur_data);
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if (data_end == cur_data)
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use_next_block(FALSE);
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result= uint2korr(cur_data);
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((uchar*)&result)[0]= *cur_data;
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use_next_block(FALSE);
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((uchar*)&result)[1]= *(cur_data++);
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uint Querycache_stream::load_int()
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size_t rest_len= data_end - cur_data;
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result= uint4korr(cur_data);
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use_next_block(FALSE);
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result= uint4korr(cur_data);
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memcpy(buf, cur_data, rest_len);
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use_next_block(FALSE);
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memcpy(buf+rest_len, cur_data, 4-rest_len);
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cur_data+= 4-rest_len;
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result= uint4korr(buf);
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ulonglong Querycache_stream::load_ll()
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size_t rest_len= data_end - cur_data;
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result= uint8korr(cur_data);
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use_next_block(FALSE);
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result= uint8korr(cur_data);
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memcpy(&result, cur_data, rest_len);
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use_next_block(FALSE);
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memcpy(((uchar*)&result)+rest_len, cur_data, 8-rest_len);
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cur_data+= 8-rest_len;
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void Querycache_stream::load_str_only(char *buffer, uint str_len)
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size_t rest_len= data_end - cur_data;
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if (rest_len >= str_len)
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memcpy(buffer, cur_data, str_len);
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memcpy(buffer, cur_data, rest_len);
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use_next_block(FALSE);
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char *Querycache_stream::load_str(MEM_ROOT *alloc, uint *str_len)
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*str_len= load_int();
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if (!(result= (char*) alloc_root(alloc, *str_len + 1)))
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load_str_only(result, *str_len);
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int Querycache_stream::load_safe_str(MEM_ROOT *alloc, char **str, uint *str_len)
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if (!(*str_len= load_int()))
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if (!(*str= (char*) alloc_root(alloc, *str_len + 1)))
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load_str_only(*str, *str_len);
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int Querycache_stream::load_column(MEM_ROOT *alloc, char** column)
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if (!(len = load_int()))
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if (!(*column= (char *)alloc_root(alloc, len + sizeof(uint) + 1)))
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*((uint*)*column)= len;
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(*column)+= sizeof(uint);
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load_str_only(*column, len);
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uint emb_count_querycache_size(THD *thd)
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MYSQL_FIELD *field_end;
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MYSQL_DATA *data= thd->first_data;
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while (data->embedded_info->next)
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data= data->embedded_info->next;
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field= data->embedded_info->fields_list;
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field_end= field + data->fields;
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*data->embedded_info->prev_ptr= NULL; // this marks the last record
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/* n_fields + n_rows + field_info * n_fields */
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result+= (uint) (4+8 + 42*data->fields);
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for(; field < field_end; field++)
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result+= field->name_length + field->table_length +
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field->org_name_length + field->org_table_length + field->db_length +
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field->catalog_length;
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result+= field->def_length;
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if (thd->protocol == &thd->protocol_binary)
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result+= (uint) (4*n_rows);
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for (; cur_row; cur_row=cur_row->next)
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result+= cur_row->length;
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result+= (uint) (4*n_rows*data->fields);
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for (; cur_row; cur_row=cur_row->next)
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MYSQL_ROW col= cur_row->data;
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MYSQL_ROW col_end= col + data->fields;
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for (; col < col_end; col++)
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result+= *(uint *)((*col) - sizeof(uint));
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void emb_store_querycache_result(Querycache_stream *dst, THD *thd)
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MYSQL_FIELD *field_end;
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MYSQL_DATA *data= thd->first_data;
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DBUG_ENTER("emb_store_querycache_result");
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while (data->embedded_info->next)
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data= data->embedded_info->next;
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field= data->embedded_info->fields_list;
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field_end= field + data->fields;
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*data->embedded_info->prev_ptr= NULL; // this marks the last record
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dst->store_int((uint)data->fields);
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dst->store_ll((ulonglong)n_rows);
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for(; field < field_end; field++)
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dst->store_int((uint)field->length);
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dst->store_int((uint)field->max_length);
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dst->store_uchar((uchar)field->type);
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dst->store_short((ushort)field->flags);
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dst->store_short((ushort)field->charsetnr);
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dst->store_uchar((uchar)field->decimals);
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dst->store_str(field->name, field->name_length);
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dst->store_str(field->table, field->table_length);
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dst->store_str(field->org_name, field->org_name_length);
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dst->store_str(field->org_table, field->org_table_length);
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dst->store_str(field->db, field->db_length);
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dst->store_str(field->catalog, field->catalog_length);
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dst->store_safe_str(field->def, field->def_length);
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if (thd->protocol == &thd->protocol_binary)
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for (; cur_row; cur_row=cur_row->next)
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dst->store_str((char *) cur_row->data, cur_row->length);
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for (; cur_row; cur_row=cur_row->next)
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MYSQL_ROW col= cur_row->data;
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MYSQL_ROW col_end= col + data->fields;
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for (; col < col_end; col++)
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uint len= *col ? *(uint *)((*col) - sizeof(uint)) : 0;
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dst->store_safe_str(*col, len);
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DBUG_ASSERT(emb_count_querycache_size(thd) == dst->stored_size);
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int emb_load_querycache_result(THD *thd, Querycache_stream *src)
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MYSQL_DATA *data= thd->alloc_new_dataset();
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MYSQL_FIELD *field_end;
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MYSQL_ROWS *row, *end_row;
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MYSQL_ROWS **prev_row;
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DBUG_ENTER("emb_load_querycache_result");
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init_alloc_root(&data->alloc, 8192,0);
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f_alloc= &data->alloc;
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data->fields= src->load_int();
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rows= src->load_ll();
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if (!(field= (MYSQL_FIELD *)
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alloc_root(f_alloc,data->fields*sizeof(MYSQL_FIELD))))
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data->embedded_info->fields_list= field;
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for(field_end= field+data->fields; field < field_end; field++)
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field->length= src->load_int();
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field->max_length= (unsigned int)src->load_int();
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field->type= (enum enum_field_types)src->load_uchar();
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field->flags= (unsigned int)src->load_short();
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field->charsetnr= (unsigned int)src->load_short();
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field->decimals= src->load_uchar();
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if (!(field->name= src->load_str(f_alloc, &field->name_length)) ||
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!(field->table= src->load_str(f_alloc,&field->table_length)) ||
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!(field->org_name= src->load_str(f_alloc, &field->org_name_length)) ||
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!(field->org_table= src->load_str(f_alloc, &field->org_table_length))||
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!(field->db= src->load_str(f_alloc, &field->db_length)) ||
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!(field->catalog= src->load_str(f_alloc, &field->catalog_length)) ||
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src->load_safe_str(f_alloc, &field->def, &field->def_length))
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if (thd->protocol == &thd->protocol_binary)
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row= (MYSQL_ROWS *)alloc_root(&data->alloc,
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(size_t) (rows * sizeof(MYSQL_ROWS)));
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for (prev_row= &row->next; row < end_row; prev_row= &row->next, row++)
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row->data= (MYSQL_ROW) src->load_str(&data->alloc, &length);
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row= (MYSQL_ROWS *)alloc_root(&data->alloc,
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(uint) (rows * sizeof(MYSQL_ROWS) +
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rows*(data->fields+1)*sizeof(char*)));
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columns= (MYSQL_ROW)end_row;
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for (prev_row= &row->next; row < end_row; prev_row= &row->next, row++)
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MYSQL_ROW col_end= columns + data->fields;
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for (; columns < col_end; columns++)
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src->load_column(&data->alloc, columns);
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data->embedded_info->prev_ptr= prev_row;
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net_send_eof(thd, thd->server_status, thd->total_warn_count);
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#endif /*HAVE_QUERY_CACHE*/