390.1.2
by Monty Taylor
Fixed copyright headers in drizzled/ |
1 |
/* -*- 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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1999.6.1
by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file |
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* Copyright (C) 2008-2009 Sun Microsystems, Inc.
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390.1.2
by Monty Taylor
Fixed copyright headers in drizzled/ |
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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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1
by brian
clean slate |
19 |
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20 |
/* classes to use when handling where clause */
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21 |
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1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
22 |
#ifndef DRIZZLED_OPTIMIZER_RANGE_H
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#define DRIZZLED_OPTIMIZER_RANGE_H
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#include "drizzled/field.h" |
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#include "drizzled/item/sum.h" |
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27 |
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957.1.2
by Padraig O'Sullivan
Whoops, for to have the proper include directive for std::priority_queue |
28 |
#include <queue> |
584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
29 |
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1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
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namespace drizzled |
31 |
{
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32 |
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1541.1.1
by Brian Aker
JOIN -> Join rename |
33 |
class Join; |
1237.13.27
by Padraig O'Sullivan
Correcting the case of a number of classes in the optimizer to adhere to the coding standards. Also |
34 |
class RorIntersectReadPlan; |
584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
35 |
typedef class Item COND; |
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
36 |
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namespace internal |
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{
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1241.9.48
by Monty Taylor
Made one of the drizzled instances of IO_CACHE a pointer. |
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typedef struct st_io_cache IO_CACHE; |
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
40 |
}
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584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
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typedef struct st_key_part |
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{
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uint16_t key; |
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uint16_t part; |
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1534
by Brian Aker
Remove of KeyPartInfo |
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/* See KeyPartInfo for meaning of the next two: */
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
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uint16_t store_length; |
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uint16_t length; |
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uint8_t null_bit; |
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/**
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1
by brian
clean slate |
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Keypart flags (0 when this structure is used by partition pruning code
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for fake partitioning index description)
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*/
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206
by Brian Aker
Removed final uint dead types. |
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uint8_t flag; |
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
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Field *field; |
1
by brian
clean slate |
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} KEY_PART; |
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1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
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namespace optimizer |
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{
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1237.13.7
by Padraig O'Sullivan
Renamed PARAM to Parameter and RANGE_OPT_PARAM to RangeParameter. |
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class Parameter; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
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class SEL_ARG; |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
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/**
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1
by brian
clean slate |
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Quick select interface.
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160.1.2
by mark
remove FTPARSER and last remains of full text search |
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This class is a parent for all QUICK_*_SELECT classes.
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1
by brian
clean slate |
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The usage scenario is as follows:
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1. Create quick select
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quick= new QUICK_XXX_SELECT(...);
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2. Perform lightweight initialization. This can be done in 2 ways:
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2.a: Regular initialization
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if (quick->init())
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{
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//the only valid action after failed init() call is delete
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delete quick;
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}
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2.b: Special initialization for quick selects merged by QUICK_ROR_*_SELECT
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if (quick->init_ror_merged_scan())
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delete quick;
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3. Perform zero, one, or more scans.
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while (...)
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{
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// initialize quick select for scan. This may allocate
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// buffers and/or prefetch rows.
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if (quick->reset())
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{
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//the only valid action after failed reset() call is delete
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delete quick;
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//abort query
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}
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// perform the scan
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do
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{
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res= quick->get_next();
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} while (res && ...)
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}
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4. Delete the select:
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delete quick;
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*/
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1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
107 |
class QuickSelectInterface |
1
by brian
clean slate |
108 |
{
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public: |
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bool sorted; |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
111 |
ha_rows records; /**< estimate of # of records to be retrieved */ |
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double read_time; /**< time to perform this retrieval */ |
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Table *head; |
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/**
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1
by brian
clean slate |
115 |
Index this quick select uses, or MAX_KEY for quick selects
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that use several indexes
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*/
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482
by Brian Aker
Remove uint. |
118 |
uint32_t index; |
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
119 |
/**
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1
by brian
clean slate |
120 |
Total length of first used_key_parts parts of the key.
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Applicable if index!= MAX_KEY.
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*/
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482
by Brian Aker
Remove uint. |
123 |
uint32_t max_used_key_length; |
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
124 |
/**
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Maximum number of (first) key parts this quick select uses for retrieval.
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1
by brian
clean slate |
126 |
eg. for "(key1p1=c1 AND key1p2=c2) OR key1p1=c2" used_key_parts == 2.
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Applicable if index!= MAX_KEY.
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128 |
||
129 |
For QUICK_GROUP_MIN_MAX_SELECT it includes MIN/MAX argument keyparts.
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*/
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482
by Brian Aker
Remove uint. |
131 |
uint32_t used_key_parts; |
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
132 |
/**
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* The rowid of last row retrieved by this quick select. This is used only when
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* doing ROR-index_merge selects
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*/
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unsigned char *last_rowid; |
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138 |
/**
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* Table record buffer used by this quick select.
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*/
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unsigned char *record; |
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1
by brian
clean slate |
142 |
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1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
143 |
QuickSelectInterface(); |
144 |
virtual ~QuickSelectInterface(){}; |
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1
by brian
clean slate |
145 |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
146 |
/**
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* Do post-constructor initialization.
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*
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* @details
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*
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* Performs initializations that should have been in constructor if
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* it was possible to return errors from constructors. The join optimizer may
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* create and then delete quick selects without retrieving any rows so init()
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* must not contain any IO or CPU intensive code.
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*
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* If init() call fails the only valid action is to delete this quick select,
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* reset() and get_next() must not be called.
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*
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* @retval
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* 0 OK
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* @retval
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* other Error code
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*/
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virtual int init() = 0; |
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/**
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* Initializes quick select for row retrieval.
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*
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* @details
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*
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* Should be called when it is certain that row retrieval will be
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* necessary. This call may do heavyweight initialization like buffering first
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* N records etc. If reset() call fails get_next() must not be called.
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* Note that reset() may be called several times if
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* - the quick select is executed in a subselect
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* - a JOIN buffer is used
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*
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* @retval
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* 0 OK
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* @retval
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* other Error code
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*/
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virtual int reset(void) = 0; |
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/** Gets next record to retrieve */
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virtual int get_next() = 0; |
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186 |
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187 |
/** Range end should be called when we have looped over the whole index */
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1
by brian
clean slate |
188 |
virtual void range_end() {} |
189 |
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1237.13.11
by Padraig O'Sullivan
Split the QUICK_ROR_INTERSECT_SELECT class out into its own header and implementation files. |
190 |
virtual bool reverse_sorted() const = 0; |
191 |
||
192 |
virtual bool unique_key_range() const |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
193 |
{
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194 |
return false; |
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195 |
}
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1
by brian
clean slate |
196 |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
197 |
enum
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198 |
{
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199 |
QS_TYPE_RANGE= 0, |
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200 |
QS_TYPE_INDEX_MERGE= 1, |
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201 |
QS_TYPE_RANGE_DESC= 2, |
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202 |
QS_TYPE_ROR_INTERSECT= 4, |
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203 |
QS_TYPE_ROR_UNION= 5, |
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204 |
QS_TYPE_GROUP_MIN_MAX= 6 |
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1
by brian
clean slate |
205 |
};
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206 |
||
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
207 |
/** Returns the type of this quick select - one of the QS_TYPE_* values */
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1237.13.11
by Padraig O'Sullivan
Split the QUICK_ROR_INTERSECT_SELECT class out into its own header and implementation files. |
208 |
virtual int get_type() const = 0; |
1
by brian
clean slate |
209 |
|
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
210 |
/**
|
211 |
* Initialize this quick select as a merged scan inside a ROR-union or a ROR-
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212 |
* intersection scan. The caller must not additionally call init() if this
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213 |
* function is called.
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214 |
*
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1183.1.2
by Brian Aker
Rename of handler to Cursor. You would not believe how long I have wanted |
215 |
* @param If true, the quick select may use table->Cursor,
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216 |
* otherwise it must create and use a separate Cursor
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
217 |
* object.
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218 |
*
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219 |
* @retval
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220 |
* 0 Ok
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221 |
* @retval
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222 |
* other Error
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223 |
*/
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520.9.3
by mordred
zomg. Solaris actually builds all the way!!! |
224 |
virtual int init_ror_merged_scan(bool) |
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
225 |
{
|
226 |
assert(0); |
|
227 |
return 1; |
|
228 |
}
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1
by brian
clean slate |
229 |
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1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
230 |
/**
|
231 |
* Save ROWID of last retrieved row in file->ref. This used in ROR-merging.
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|
232 |
*/
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1
by brian
clean slate |
233 |
virtual void save_last_pos(){}; |
234 |
||
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
235 |
/**
|
236 |
* Append comma-separated list of keys this quick select uses to key_names;
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237 |
* append comma-separated list of corresponding used lengths to used_lengths.
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238 |
*
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1240.7.1
by Padraig O'Sullivan
Created an ExplainPlan class in the optimizer namespace. All printing of an explain in drizzle goes |
239 |
* @note This is used by during explain plan.
|
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
240 |
*/
|
241 |
virtual void add_keys_and_lengths(String *key_names, String *used_lengths)=0; |
|
1
by brian
clean slate |
242 |
|
1055.2.21
by Jay Pipes
Documentation and indentation/style cleanups in sql_select, opt_range.h and join_tab.h. This patch doxygenates classes/structs and their member variables. |
243 |
/**
|
244 |
* Append text representation of quick select structure (what and how is
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|
245 |
* merged) to str. The result is added to "Extra" field in EXPLAIN output.
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246 |
*
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|
247 |
* @note
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248 |
*
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|
249 |
* This function is implemented only by quick selects that merge other quick
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|
250 |
* selects output and/or can produce output suitable for merging.
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|
251 |
*/
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252 |
virtual void add_info_string(String *) |
|
253 |
{}
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254 |
||
255 |
/**
|
|
256 |
* Returns true if any index used by this quick select
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257 |
* uses field which is marked in passed bitmap.
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|
258 |
*/
|
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1802.16.6
by Padraig O'Sullivan
Added temporary conversion of a bitmap to dynamic_bitset in order to remove references to MyBitmap within optimizer code. |
259 |
virtual bool is_keys_used(const boost::dynamic_bitset<>& fields); |
1
by brian
clean slate |
260 |
};
|
261 |
||
262 |
struct st_qsel_param; |
|
1237.13.5
by Padraig O'Sullivan
Split some classes from the range optimizer out in to their own header and implementation files. |
263 |
class QuickRange; |
264 |
class QuickRangeSelect; |
|
1
by brian
clean slate |
265 |
|
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
266 |
/**
|
1237.13.2
by Padraig O'Sullivan
Modified the names of 2 classes in the optimizer to adhere to the coding standards. |
267 |
* MRR range sequence, array<QuickRange> implementation: sequence traversal
|
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
268 |
* context.
|
269 |
*/
|
|
1
by brian
clean slate |
270 |
typedef struct st_quick_range_seq_ctx |
271 |
{
|
|
1237.13.2
by Padraig O'Sullivan
Modified the names of 2 classes in the optimizer to adhere to the coding standards. |
272 |
QuickRange **first; |
273 |
QuickRange **cur; |
|
274 |
QuickRange **last; |
|
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
275 |
} QuickRangeSequenceContext; |
1
by brian
clean slate |
276 |
|
482
by Brian Aker
Remove uint. |
277 |
range_seq_t quick_range_seq_init(void *init_param, uint32_t n_ranges, uint32_t flags); |
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
278 |
|
482
by Brian Aker
Remove uint. |
279 |
uint32_t quick_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range); |
1
by brian
clean slate |
280 |
|
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
281 |
/**
|
282 |
* Executor class for SELECT statements.
|
|
283 |
*
|
|
284 |
* @details
|
|
285 |
*
|
|
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
286 |
* The QuickSelectInterface member variable is the implementor
|
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
287 |
* of the SELECT execution.
|
288 |
*/
|
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
289 |
class SqlSelect : public memory::SqlAlloc |
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
290 |
{
|
1
by brian
clean slate |
291 |
public: |
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
292 |
QuickSelectInterface *quick; /**< If quick-select used */ |
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
293 |
COND *cond; /**< where condition */ |
327.1.5
by Brian Aker
Refactor around classes. TABLE_LIST has been factored out of table.h |
294 |
Table *head; |
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
295 |
internal::IO_CACHE *file; /**< Positions to used records */ |
1055.2.22
by Jay Pipes
Documents and doxygenates all the myriad classes in opt_range.h (all the QUIK_SELECT class interfaces |
296 |
ha_rows records; /**< Records in use if read from file */ |
297 |
double read_time; /**< Time to read rows */ |
|
298 |
key_map quick_keys; /**< Possible quick keys */ |
|
299 |
key_map needed_reg; /**< Possible quick keys after prev tables. */ |
|
300 |
table_map const_tables; |
|
301 |
table_map read_tables; |
|
302 |
bool free_cond; |
|
1
by brian
clean slate |
303 |
|
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
304 |
SqlSelect(); |
305 |
~SqlSelect(); |
|
1
by brian
clean slate |
306 |
void cleanup(); |
584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
307 |
bool check_quick(Session *session, bool force_quick_range, ha_rows limit); |
308 |
bool skip_record(); |
|
520.1.22
by Brian Aker
Second pass of thd cleanup |
309 |
int test_quick_select(Session *session, key_map keys, table_map prev_tables, |
584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
310 |
ha_rows limit, bool force_quick_range, |
1
by brian
clean slate |
311 |
bool ordered_output); |
312 |
};
|
|
313 |
||
1237.13.2
by Padraig O'Sullivan
Modified the names of 2 classes in the optimizer to adhere to the coding standards. |
314 |
QuickRangeSelect *get_quick_select_for_ref(Session *session, |
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
315 |
Table *table, |
1089.1.14
by Brian Aker
Fix TABLE_REF structure |
316 |
struct table_reference_st *ref, |
1
by brian
clean slate |
317 |
ha_rows records); |
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
318 |
|
319 |
/*
|
|
1237.13.2
by Padraig O'Sullivan
Modified the names of 2 classes in the optimizer to adhere to the coding standards. |
320 |
Create a QuickRangeSelect from given key and SEL_ARG tree for that key.
|
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
321 |
|
322 |
SYNOPSIS
|
|
323 |
get_quick_select()
|
|
324 |
param
|
|
325 |
idx Index of used key in param->key.
|
|
326 |
key_tree SEL_ARG tree for the used key
|
|
327 |
mrr_flags MRR parameter for quick select
|
|
328 |
mrr_buf_size MRR parameter for quick select
|
|
329 |
parent_alloc If not NULL, use it to allocate memory for
|
|
330 |
quick select data. Otherwise use quick->alloc.
|
|
331 |
NOTES
|
|
332 |
The caller must call QUICK_SELECT::init for returned quick select.
|
|
333 |
||
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
334 |
CAUTION! This function may change session->mem_root to a memory::Root which will be
|
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
335 |
deallocated when the returned quick select is deleted.
|
336 |
||
337 |
RETURN
|
|
338 |
NULL on error
|
|
339 |
otherwise created quick select
|
|
340 |
*/
|
|
1237.13.7
by Padraig O'Sullivan
Renamed PARAM to Parameter and RANGE_OPT_PARAM to RangeParameter. |
341 |
QuickRangeSelect *get_quick_select(Parameter *param, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
342 |
uint32_t index, |
343 |
SEL_ARG *key_tree, |
|
344 |
uint32_t mrr_flags, |
|
345 |
uint32_t mrr_buf_size, |
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
346 |
memory::Root *alloc); |
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
347 |
|
1892.3.3
by tdavies
struct order_st changed and renamed to c++ class named:Order |
348 |
uint32_t get_index_for_order(Table *table, Order *order, ha_rows limit); |
1
by brian
clean slate |
349 |
|
1237.13.3
by Padraig O'Sullivan
Performed numerous style cleanups in range.[cc,h]. |
350 |
SqlSelect *make_select(Table *head, |
1237.13.12
by Padraig O'Sullivan
Corrected the name of the QUICK_ROR_INTERSECT_CLASS class to adhere to the drizzle coding standards. |
351 |
table_map const_tables, |
352 |
table_map read_tables, |
|
353 |
COND *conds, |
|
354 |
bool allow_null_cond, |
|
355 |
int *error); |
|
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
356 |
|
1237.13.7
by Padraig O'Sullivan
Renamed PARAM to Parameter and RANGE_OPT_PARAM to RangeParameter. |
357 |
bool get_quick_keys(Parameter *param, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
358 |
QuickRangeSelect *quick, |
359 |
KEY_PART *key, |
|
1237.9.2
by Padraig O'Sullivan
Moved opt_range.[cc,h] into the optimizer directory and namespace and renamed the files to |
360 |
SEL_ARG *key_tree, |
361 |
unsigned char *min_key, |
|
362 |
uint32_t min_key_flag, |
|
363 |
unsigned char *max_key, |
|
364 |
uint32_t max_key_flag); |
|
365 |
||
366 |
} /* namespace optimizer */ |
|
367 |
||
368 |
} /* namespace drizzled */ |
|
369 |
||
370 |
#endif /* DRIZZLED_OPTIMIZER_RANGE_H */ |