GIF89a=( �' 7IAXKgNgYvYx\%wh&h}t�h%�s%x�}9�R��&�0%� (�.��5�SD��&�a)�x5��;ͣ*ȡ&ղ)ׯ7׵<ѻ4�3�H֧KͯT��Y�aq��q��F� !� ' !� NETSCAPE2.0 , =( ��pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g���E�������R���E����B�� ��ȸ��D���"�Ů� �H��L��D٫D�B�����D���T���H �G��A R�ڐ |�� ٭&��E8�S�kG�A�px�a��� R2XB��E8I���6X�:vT)�~��q�賥��"F~%x� � 4#Z�0O|-4Bs�X:= Q� Sal��yXJ`GȦ|s h��K3l7�B|�$'7Jީܪ0!��D�n=�P� ����0`�R�lj����v>���5 �.69�ϸd�����nlv�9��f{���Pbx �l5}�p� ��� �3a���I�O����!ܾ���i��9��#��)p�a ޽ �{�)vm��%D~ 6f��s}Œ�D�W E�`!� �&L8x� �ܝ{)x`X/>�}m��R�*|`D�=�_ ^�5 !_&'a�O�7�c��`DCx`�¥�9�Y�F���`?��"� �n@`�} lď��@4>�d S �v�xN��"@~d��=�g�s~G��� ���ud &p8Q�)ƫlXD����A~H�ySun�j���k*D�LH�] ��C"J��Xb~ʪwSt}6K,��q�S:9ت:���l�@�`�� �.۬�t9�S�[:��=`9N����{¿�A !R�:���6��x�0�_ �;������^���#����!����U���;0L1�����p% A��U̬ݵ��%�S��!���~`�G���� ���=4�np�3���������u�u�ٮ|%2�I��r�#0��J``8�@S@5� ���^`8E�]�.�S���7 � �0�j S�D� z���i�S�����!���l��w9*�D�I�nEX��� &A�Go�Qf��F��;���}�J����F5��Q|���X��T��y���]� o ��C=��:���PB@ D׽S�(>�C�x}`��xJЬ�۠��p+eE0`�}`A �/NE�� �9@��� H�7�!%B0`�l*��!8 2�%� �:�1�0E��ux%nP1�!�C)�P81l�ɸF#Ƭ{����B0>�� �b�`��O3��()yRpb��E.ZD8�H@% �Rx+%���c� ���f��b�d�`F�"8�XH"��-�|1�6iI, 2�$+](A*j� QT�o0.�U�`�R�}`�SN����yae�����b��o~ S)�y�@��3 �tT�0�&�+~L�f"�-|�~��>!�v��~�\Q1)}@�}h#aP72�"�$ !� " , =( &7IAXG]KgNgYvYxR"k\%w]'}h}t�h%�g+�s%r.m3ax3�x�}9��&��+�!7�0%� (�.�SD��&��;�"&ײ)׻4��6�K� �@pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g �� E �� �������E �´��C���ǶR��D��"Ʒ�ʱH��M��GڬD�B����D��T����G���C�C� l&�~:'�tU�6ɹ#��)�'�.6�&��Ȼ K(8p0N�?!�2"��NIJX>R��OM '��2�*x�>#n� �@<[:�I�f ��T���Cdb��[�}E�5MBo��@�`@��tW-3 �x�B���jI�&E�9[T&$��ﯧ&"s��ȳ����dc�UUρ#���ldj?����`\}���u|3'�R]�6 �S#�!�FKL�*N E���`$�:e�YD�q�.�촁�s \-�jA 9�����-��M[�x(�s��x�|���p��}k�T�DpE@W� ��]k`1� ���Yb ��0l��*n0��"~zBd�~u�7�0Bl��0-�x~|U�U0 �h�*HS�|��e"#"?vp�i`e6^�+q��`m8 #V�� ��VS|`��"m"сSn|@:U���~`pb�G�ED����2F�I�? >�x� R� ��%~jx��<�a�9ij�2�D��&: Z`�]w���:�6��B�7eFJ|�ҧ�,���FǮcS�ʶ+B�,�ܺN���>PAD�HD��~���n��}�#�� Q��S���2�X�{�k�lQ�2�����w�|2� h9��G�,m���3��6-��E�L��I�³*K���q�`DwV�QXS��peS��� qܧTS����R�u �<�a�*At�lmE� � ��N[P1�ۦ��$��@`��Dpy�yXvCAy�B`}D� 0QwG#� �a[^�� $���Ǧ{L�"[��K�g�;�S~��GX.�goT.��ư��x���?1z��x~:�g�|�L� ��S`��0S]P�^p F<""�?!,�!N4&P� ����:T�@h�9%t��:�-~�I<`�9p I&.)^ 40D#p@�j4�ج:�01��rܼF2oW�#Z ;$Q q  �K��Nl#29 !F@�Bh�ᏬL!XF�LHKh�.�hE&J�G��<"WN!�����Y@� >R~19J"�2,/ &.GXB%�R�9B6�W]���W�I�$��9�RE8Y� ��"�A5�Q.axB�&ة�J�! �t)K%tS-�JF b�NMxL��)�R��"���6O!TH�H� 0 !� ) , =( &AXKgNgYvYxR"k\%wh&h}h%�g+�s%r.x3�x�}9��&��+�R,�!7�0%� (�.��5��&�a)��;�"&ף*Ȳ)ׯ7׻4�3��6�H֧KͻH�T��Y��q��h� ��pH,�Ȥr�l:xШtJ�Z�جv��z��xL.:��z�n���|N�����~�������& !�0`9R�}��"�"a:S�~x��������g �� E$����� � ����$E$��"��D� � ������R��C��� E ��H�M��G�D� �B��ϾD��a��`1r��Ӑ�� �o~�zU!L�C'�yW�UGt����ll�0���uG�)A�s[��x� �xO%��X2�  P�n:R/��aHae+�Dm?# ǣ6�8�J�x�Di�M���j���5oQ7�- <! *�l��R2r/a!l)d� A"�E���� &� ;��c �%����b��pe~C"B���H�eF2��`8qb�t_`ur`e� w�u3��Pv�h""�`�Íx�LĹ��3� �~ֺ�:���MDfJ� �۵�W�%�S�X �؁)�@��:E��w�u�Sxb8y\m�zS��Zb�E�L��w!y(>�"w�=�|��s�d �C�W)H�cC$�L �7r.�\{)@�`@ �X�$PD `aaG:���O�72E�amn]�"Rc�x�R� &dR8`g��i�xLR!�P &d����T���i�|�_ � Qi�#�`g:��:noM� :V �)p����W&a=�e�k� j���1߲s�x�W�jal|0��B0�, \j۴:6���C ��W��|��9���zĸV {�;��n��V�m�I��.��PN� ����C��+��By�ѾHŸ:��� 7�Y�FTk�SaoaY$D�S���29R�kt� ��f� ��:��Sp�3�I��DZ� �9���g��u�*3)O��[_hv ,���Et x�BH� �[��64M@�S�M7d�l�ܶ5-��U܍��z�R3Ԭ3~ ��P��5�g: ���kN�&0�j4���#{��3S�2�K�'ợl���2K{� {۶?~m𸧠�I�nE�='����^���_�=��~�#O���'���o..�Y�n��CSO��a��K��o,���b�����{�C�� "�{�K ��w��Ozdը�:$ ���v�] A#� ���a�z)Rx׿ƥ�d``�w-�y�f�K!����|��P��=�`�(f��'Pa ��BJa%��f�%`�}F����6>��`G"�}�=�!o`�^FP�ةQ�C���`(�}\�ݮ ��$<��n@dĠE#��U�I�!� #l��9`k���'Rr��Z�NB�MF �[�+9���-�wj���8�r� ,V�h"�|�S=�G_��"E� 0i*%̲��da0mVk�):;&6p>�jK ��# �D�:�c?:R Ӭf��I-�"�<�="��7�3S��c2RW ,�8(T"P0F¡Jh�" ; 403WebShell
403Webshell
Server IP : 173.249.157.85  /  Your IP : 3.142.200.134
Web Server : Apache
System : Linux server.frogzhost.com 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64
User : econtech ( 1005)
PHP Version : 7.3.33
Disable Function : NONE
MySQL : OFF  |  cURL : OFF  |  WGET : ON  |  Perl : ON  |  Python : ON  |  Sudo : ON  |  Pkexec : ON
Directory :  /usr/include/mysql/server/private/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :


[ Back ]     

Current File : /usr/include/mysql/server/private/sql_window.h
/*
   Copyright (c) 2016, 2022 MariaDB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef SQL_WINDOW_INCLUDED
#define SQL_WINDOW_INCLUDED

#include "filesort.h"

class Item_window_func;

/*
  Window functions module. 
  
  Each instance of window function has its own element in SELECT_LEX::window_specs.
*/


class Window_frame_bound : public Sql_alloc
{

public:
 
  enum Bound_precedence_type
  {
    PRECEDING,
    CURRENT,           // Used for CURRENT ROW window frame bounds
    FOLLOWING
  };

  Bound_precedence_type precedence_type;
 

  /* 
    For UNBOUNDED PRECEDING / UNBOUNDED FOLLOWING window frame bounds
    precedence type is seto to PRECEDING / FOLLOWING and
    offset is set to NULL. 
    The offset is not meaningful with precedence type CURRENT 
  */
  Item *offset;

  Window_frame_bound(Bound_precedence_type prec_type,
                     Item *offset_val)
    : precedence_type(prec_type), offset(offset_val) {}

  bool is_unbounded() { return offset == NULL; }

  void print(String *str, enum_query_type query_type);

};


class Window_frame : public Sql_alloc
{
  
public:

  enum Frame_units
  {
    UNITS_ROWS,
    UNITS_RANGE
  };

  enum Frame_exclusion
  {
    EXCL_NONE,
    EXCL_CURRENT_ROW,
    EXCL_GROUP,
    EXCL_TIES
  };

  Frame_units units;

  Window_frame_bound *top_bound;

  Window_frame_bound *bottom_bound;

  Frame_exclusion exclusion;

  Window_frame(Frame_units win_frame_units,
               Window_frame_bound *win_frame_top_bound,
               Window_frame_bound *win_frame_bottom_bound,
               Frame_exclusion win_frame_exclusion)
    : units(win_frame_units), top_bound(win_frame_top_bound),
      bottom_bound(win_frame_bottom_bound), exclusion(win_frame_exclusion) {}

  bool check_frame_bounds();

  void print(String *str, enum_query_type query_type);

};

class Window_spec : public Sql_alloc
{
  bool window_names_are_checked;
 public:
  virtual ~Window_spec() {}

  LEX_CSTRING *window_ref;

  SQL_I_List<ORDER> *partition_list;
  SQL_I_List<ORDER> *save_partition_list;

  SQL_I_List<ORDER> *order_list;
  SQL_I_List<ORDER> *save_order_list;

  Window_frame *window_frame;

  Window_spec *referenced_win_spec;

  /*
    Window_spec objects are numbered by the number of their appearance in the
    query. This is used by compare_order_elements() to provide a predictable
    ordering of PARTITION/ORDER BY clauses.
  */
  int win_spec_number;

  Window_spec(LEX_CSTRING *win_ref, SQL_I_List<ORDER> *part_list,
              SQL_I_List<ORDER> *ord_list, Window_frame *win_frame)
    : window_names_are_checked(false), window_ref(win_ref),
      partition_list(part_list), save_partition_list(NULL),
      order_list(ord_list), save_order_list(NULL),
      window_frame(win_frame), referenced_win_spec(NULL) {}

  virtual const char *name() { return NULL; }

  bool check_window_names(List_iterator_fast<Window_spec> &it);

  const char *window_reference()
  {
    return window_ref ? window_ref->str : NULL;
  }

  void join_partition_and_order_lists()
  {
    *(partition_list->next)= order_list->first;
  }

  void disjoin_partition_and_order_lists()
  {
    *(partition_list->next)= NULL;
  }

  void print(String *str, enum_query_type query_type);
  void print_order(String *str, enum_query_type query_type);
  void print_partition(String *str, enum_query_type query_type);

};

class Window_def : public Window_spec
{
 public:

  LEX_CSTRING *window_name;

  Window_def(LEX_CSTRING *win_name,
             LEX_CSTRING *win_ref, 
             SQL_I_List<ORDER> *part_list,
             SQL_I_List<ORDER> *ord_list,
             Window_frame *win_frame) 
    : Window_spec(win_ref, part_list, ord_list, win_frame),
      window_name(win_name) {}
 
  const char *name() { return window_name->str; }

};

int setup_windows(THD *thd, Ref_ptr_array ref_pointer_array, TABLE_LIST *tables,
	          List<Item> &fields, List<Item> &all_fields, 
                  List<Window_spec> &win_specs, List<Item_window_func> &win_funcs);


//////////////////////////////////////////////////////////////////////////////
// Classes that make window functions computation a part of SELECT's query plan
//////////////////////////////////////////////////////////////////////////////

class Frame_cursor;
/*
  This handles computation of one window function.

  Currently, we make a spearate filesort() call for each window function.
*/

class Window_func_runner : public Sql_alloc
{
public:
  /* Add the function to be computed during the execution pass  */
  bool add_function_to_run(Item_window_func *win_func);

  /* Compute and fill the fields in the table. */
  bool exec(THD *thd, TABLE *tbl, SORT_INFO *filesort_result);

private:
  /* A list of window functions for which this Window_func_runner will compute
     values during the execution phase. */
  List<Item_window_func> window_functions;
};


/*
  Represents a group of window functions that require the same sorting of 
  rows and so share the filesort() call.

*/

class Window_funcs_sort : public Sql_alloc
{
public:
  bool setup(THD *thd, SQL_SELECT *sel, List_iterator<Item_window_func> &it,
             st_join_table *join_tab);
  bool exec(JOIN *join, bool keep_filesort_result);
  void cleanup() { delete filesort; }

  friend class Window_funcs_computation;

private:
  Window_func_runner runner;

  /* Window functions can be computed over this sorting */
  Filesort *filesort;
};


struct st_join_table;
class Explain_aggr_window_funcs;

/*
  This is a "window function computation phase": a single object of this class
  takes care of computing all window functions in a SELECT.

  - JOIN optimizer is exected to call setup() during query optimization.
  - JOIN::exec() should call exec() once it has collected join output in a
    temporary table.
*/

class Window_funcs_computation : public Sql_alloc
{
  List<Window_funcs_sort> win_func_sorts;
public:
  bool setup(THD *thd, List<Item_window_func> *window_funcs, st_join_table *tab);
  bool exec(JOIN *join, bool keep_last_filesort_result);

  Explain_aggr_window_funcs *save_explain_plan(MEM_ROOT *mem_root, bool is_analyze);
  void cleanup();
};


#endif /* SQL_WINDOW_INCLUDED */

Youez - 2016 - github.com/yon3zu
LinuXploit