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1039.2.3
by Jay Pipes
Phase 3 of refactoring JOIN |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2008 Sun Microsystems
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*
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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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*
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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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*
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DRIZZLED_JOIN_CACHE_H
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#define DRIZZLED_JOIN_CACHE_H
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#include "drizzled/server_includes.h" |
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class Field_blob; |
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1089.1.1
by Brian Aker
Remove of JOIN_TAB to JoinTable |
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typedef JoinTable JoinTable; |
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1039.2.3
by Jay Pipes
Phase 3 of refactoring JOIN |
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/**
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CACHE_FIELD and JOIN_CACHE is used on full join to cache records in outer
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table
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*/
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typedef struct st_cache_field { |
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/*
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Where source data is located (i.e. this points to somewhere in
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tableX->record[0])
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*/
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unsigned char *str; |
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uint32_t length; /* Length of data at *str, in bytes */ |
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uint32_t blob_length; /* Valid IFF blob_field != 0 */ |
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Field_blob *blob_field; |
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bool strip; /* true <=> Strip endspaces ?? */ |
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Table *get_rowid; /* _ != NULL <=> */ |
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} CACHE_FIELD; |
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typedef struct st_join_cache |
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{
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unsigned char *buff; |
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unsigned char *pos; /* Start of free space in the buffer */ |
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unsigned char *end; |
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uint32_t records; /* # of row cominations currently stored in the cache */ |
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uint32_t record_nr; |
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uint32_t ptr_record; |
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/*
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Number of fields (i.e. cache_field objects). Those correspond to table
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columns, and there are also special fields for
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- table's column null bits
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- table's null-complementation byte
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- [new] table's rowid.
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*/
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uint32_t fields; |
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uint32_t length; |
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uint32_t blobs; |
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CACHE_FIELD *field; |
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CACHE_FIELD **blob_ptr; |
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SQL_SELECT *select; |
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} JOIN_CACHE; |
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1089.1.1
by Brian Aker
Remove of JOIN_TAB to JoinTable |
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int join_init_cache(Session *session, JoinTable *tables, uint32_t table_count); |
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1039.2.3
by Jay Pipes
Phase 3 of refactoring JOIN |
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void reset_cache_read(JOIN_CACHE *cache); |
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void reset_cache_write(JOIN_CACHE *cache); |
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1039.2.7
by Jay Pipes
Yet more style and indentation cleanups. |
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bool store_record_in_cache(JOIN_CACHE *cache); |
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1039.2.3
by Jay Pipes
Phase 3 of refactoring JOIN |
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#endif /* DRIZZLED_JOIN_CACHE_H */ |