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+#ifndef SQL_ANALYSE_INCLUDED
+#define SQL_ANALYSE_INCLUDED
+
+/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+
+ 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 02110-1335 USA */
+
+
+/* Analyse database */
+
+#ifdef USE_PRAGMA_INTERFACE
+#pragma interface /* gcc class implementation */
+#endif
+
+#include "procedure.h" /* Procedure */
+
+#define my_thd_charset default_charset_info
+
+#define DEC_IN_AVG 4
+
+typedef struct st_number_info
+{
+ // if zerofill is true, the number must be zerofill, or string
+ bool negative, is_float, zerofill, maybe_zerofill;
+ int8 integers;
+ int8 decimals;
+ double dval;
+ ulonglong ullval;
+} NUM_INFO;
+
+typedef struct st_extreme_value_number_info
+{
+ ulonglong ullval;
+ longlong llval;
+ double max_dval, min_dval;
+} EV_NUM_INFO;
+
+typedef struct st_tree_info
+{
+ bool found;
+ String *str;
+ Item *item;
+} TREE_INFO;
+
+uint check_ulonglong(const char *str, uint length);
+bool get_ev_num_info(EV_NUM_INFO *ev_info, NUM_INFO *info, const char *num);
+bool test_if_number(NUM_INFO *info, const char *str, uint str_len);
+int compare_double(const double *s, const double *t);
+int compare_double2(void* cmp_arg __attribute__((unused)),
+ const double *s, const double *t);
+int compare_longlong(const longlong *s, const longlong *t);
+int compare_longlong2(void* cmp_arg __attribute__((unused)),
+ const longlong *s, const longlong *t);
+int compare_ulonglong(const ulonglong *s, const ulonglong *t);
+int compare_ulonglong2(void* cmp_arg __attribute__((unused)),
+ const ulonglong *s, const ulonglong *t);
+int compare_decimal2(int* len, const char *s, const char *t);
+Procedure *proc_analyse_init(THD *thd, ORDER *param, select_result *result,
+ List<Item> &field_list);
+int free_string(void* str, TREE_FREE, void*);
+class analyse;
+
+class field_info :public Sql_alloc
+{
+protected:
+ ulong treemem, tree_elements, empty, nulls, min_length, max_length;
+ uint room_in_tree;
+ bool found;
+ TREE tree;
+ Item *item;
+ analyse *pc;
+
+public:
+ field_info(Item* a, analyse* b) : treemem(0), tree_elements(0), empty(0),
+ nulls(0), min_length(0), max_length(0), room_in_tree(1),
+ found(0),item(a), pc(b) {};
+
+ virtual ~field_info() { delete_tree(&tree, 0); }
+ virtual void add() = 0;
+ virtual void get_opt_type(String*, ha_rows) = 0;
+ virtual String *get_min_arg(String *) = 0;
+ virtual String *get_max_arg(String *) = 0;
+ virtual String *avg(String*, ha_rows) = 0;
+ virtual String *std(String*, ha_rows) = 0;
+ virtual tree_walk_action collect_enum() = 0;
+ virtual uint decimals() { return 0; }
+ friend class analyse;
+};
+
+
+int collect_string(String *element, element_count count,
+ TREE_INFO *info);
+
+int sortcmp2(void* cmp_arg __attribute__((unused)),
+ const String *a,const String *b);
+
+class field_str :public field_info
+{
+ String min_arg, max_arg;
+ ulonglong sum;
+ bool must_be_blob, was_zero_fill, was_maybe_zerofill,
+ can_be_still_num;
+ NUM_INFO num_info;
+ EV_NUM_INFO ev_num_info;
+
+public:
+ field_str(Item* a, analyse* b) :field_info(a,b),
+ min_arg("",0,default_charset_info),
+ max_arg("",0,default_charset_info), sum(0),
+ must_be_blob(0), was_zero_fill(0),
+ was_maybe_zerofill(0), can_be_still_num(1)
+ { init_tree(&tree, 0, 0, sizeof(String), (qsort_cmp2) sortcmp2,
+ free_string, NULL, MYF(MY_THREAD_SPECIFIC)); };
+
+ void add();
+ void get_opt_type(String*, ha_rows);
+ String *get_min_arg(String *not_used __attribute__((unused)))
+ { return &min_arg; }
+ String *get_max_arg(String *not_used __attribute__((unused)))
+ { return &max_arg; }
+ String *avg(String *s, ha_rows rows)
+ {
+ if (!(rows - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ s->set_real((ulonglong2double(sum) / ulonglong2double(rows - nulls)),
+ DEC_IN_AVG,my_thd_charset);
+ return s;
+ }
+ friend int collect_string(String *element, element_count count,
+ TREE_INFO *info);
+ tree_walk_action collect_enum()
+ { return (tree_walk_action) collect_string; }
+ String *std(String *s __attribute__((unused)),
+ ha_rows rows __attribute__((unused)))
+ { return (String*) 0; }
+};
+
+
+int collect_decimal(uchar *element, element_count count,
+ TREE_INFO *info);
+
+class field_decimal :public field_info
+{
+ my_decimal min_arg, max_arg;
+ my_decimal sum[2], sum_sqr[2];
+ int cur_sum;
+ int bin_size;
+public:
+ field_decimal(Item* a, analyse* b) :field_info(a,b)
+ {
+ bin_size= my_decimal_get_binary_size(a->max_length, a->decimals);
+ init_tree(&tree, 0, 0, bin_size, (qsort_cmp2)compare_decimal2,
+ 0, (void *)&bin_size, MYF(MY_THREAD_SPECIFIC));
+ };
+
+ void add();
+ void get_opt_type(String*, ha_rows);
+ String *get_min_arg(String *);
+ String *get_max_arg(String *);
+ String *avg(String *s, ha_rows rows);
+ friend int collect_decimal(uchar *element, element_count count,
+ TREE_INFO *info);
+ tree_walk_action collect_enum()
+ { return (tree_walk_action) collect_decimal; }
+ String *std(String *s, ha_rows rows);
+};
+
+
+int collect_real(double *element, element_count count, TREE_INFO *info);
+
+class field_real: public field_info
+{
+ double min_arg, max_arg;
+ double sum, sum_sqr;
+ uint max_notzero_dec_len;
+
+public:
+ field_real(Item* a, analyse* b) :field_info(a,b),
+ min_arg(0), max_arg(0), sum(0), sum_sqr(0), max_notzero_dec_len(0)
+ { init_tree(&tree, 0, 0, sizeof(double),
+ (qsort_cmp2) compare_double2, NULL, NULL,
+ MYF(MY_THREAD_SPECIFIC)); }
+
+ void add();
+ void get_opt_type(String*, ha_rows);
+ String *get_min_arg(String *s)
+ {
+ s->set_real(min_arg, item->decimals, my_thd_charset);
+ return s;
+ }
+ String *get_max_arg(String *s)
+ {
+ s->set_real(max_arg, item->decimals, my_thd_charset);
+ return s;
+ }
+ String *avg(String *s, ha_rows rows)
+ {
+ if (!(rows - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ s->set_real(((double)sum / (double) (rows - nulls)), item->decimals,my_thd_charset);
+ return s;
+ }
+ String *std(String *s, ha_rows rows)
+ {
+ double tmp = ulonglong2double(rows);
+ if (!(tmp - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ {
+ double tmp2 = ((sum_sqr - sum * sum / (tmp - nulls)) /
+ (tmp - nulls));
+ s->set_real(((double) tmp2 <= 0.0 ? 0.0 : sqrt(tmp2)), item->decimals,my_thd_charset);
+ }
+ return s;
+ }
+ uint decimals() { return item->decimals; }
+ friend int collect_real(double *element, element_count count,
+ TREE_INFO *info);
+ tree_walk_action collect_enum()
+ { return (tree_walk_action) collect_real;}
+};
+
+int collect_longlong(longlong *element, element_count count,
+ TREE_INFO *info);
+
+class field_longlong: public field_info
+{
+ longlong min_arg, max_arg;
+ longlong sum, sum_sqr;
+
+public:
+ field_longlong(Item* a, analyse* b) :field_info(a,b),
+ min_arg(0), max_arg(0), sum(0), sum_sqr(0)
+ { init_tree(&tree, 0, 0, sizeof(longlong),
+ (qsort_cmp2) compare_longlong2, NULL, NULL,
+ MYF(MY_THREAD_SPECIFIC)); }
+
+ void add();
+ void get_opt_type(String*, ha_rows);
+ String *get_min_arg(String *s) { s->set(min_arg,my_thd_charset); return s; }
+ String *get_max_arg(String *s) { s->set(max_arg,my_thd_charset); return s; }
+ String *avg(String *s, ha_rows rows)
+ {
+ if (!(rows - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ s->set_real(((double) sum / (double) (rows - nulls)), DEC_IN_AVG,my_thd_charset);
+ return s;
+ }
+ String *std(String *s, ha_rows rows)
+ {
+ double tmp = ulonglong2double(rows);
+ if (!(tmp - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ {
+ double tmp2 = ((sum_sqr - sum * sum / (tmp - nulls)) /
+ (tmp - nulls));
+ s->set_real(((double) tmp2 <= 0.0 ? 0.0 : sqrt(tmp2)), DEC_IN_AVG,my_thd_charset);
+ }
+ return s;
+ }
+ friend int collect_longlong(longlong *element, element_count count,
+ TREE_INFO *info);
+ tree_walk_action collect_enum()
+ { return (tree_walk_action) collect_longlong;}
+};
+
+int collect_ulonglong(ulonglong *element, element_count count,
+ TREE_INFO *info);
+
+class field_ulonglong: public field_info
+{
+ ulonglong min_arg, max_arg;
+ ulonglong sum, sum_sqr;
+
+public:
+ field_ulonglong(Item* a, analyse * b) :field_info(a,b),
+ min_arg(0), max_arg(0), sum(0),sum_sqr(0)
+ { init_tree(&tree, 0, 0, sizeof(ulonglong),
+ (qsort_cmp2) compare_ulonglong2, NULL, NULL,
+ MYF(MY_THREAD_SPECIFIC)); }
+ void add();
+ void get_opt_type(String*, ha_rows);
+ String *get_min_arg(String *s) { s->set(min_arg,my_thd_charset); return s; }
+ String *get_max_arg(String *s) { s->set(max_arg,my_thd_charset); return s; }
+ String *avg(String *s, ha_rows rows)
+ {
+ if (!(rows - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ s->set_real((ulonglong2double(sum) / ulonglong2double(rows - nulls)),
+ DEC_IN_AVG,my_thd_charset);
+ return s;
+ }
+ String *std(String *s, ha_rows rows)
+ {
+ double tmp = ulonglong2double(rows);
+ if (!(tmp - nulls))
+ s->set_real((double) 0.0, 1,my_thd_charset);
+ else
+ {
+ double tmp2 = ((ulonglong2double(sum_sqr) -
+ ulonglong2double(sum * sum) / (tmp - nulls)) /
+ (tmp - nulls));
+ s->set_real(((double) tmp2 <= 0.0 ? 0.0 : sqrt(tmp2)), DEC_IN_AVG,my_thd_charset);
+ }
+ return s;
+ }
+ friend int collect_ulonglong(ulonglong *element, element_count count,
+ TREE_INFO *info);
+ tree_walk_action collect_enum()
+ { return (tree_walk_action) collect_ulonglong; }
+};
+
+
+Procedure *proc_analyse_init(THD *thd, ORDER *param,
+ select_result *result,
+ List<Item> &field_list);
+
+class analyse: public Procedure
+{
+protected:
+ Item_proc *func_items[10];
+ List<Item> fields, result_fields;
+ field_info **f_info, **f_end;
+ ha_rows rows;
+ uint output_str_length;
+
+public:
+ uint max_tree_elements, max_treemem;
+
+ analyse(select_result *res) :Procedure(res, PROC_NO_SORT), f_info(0),
+ rows(0), output_str_length(0) {}
+
+ ~analyse()
+ {
+ if (f_info)
+ {
+ for (field_info **f=f_info; f != f_end; f++)
+ delete (*f);
+ }
+ }
+ virtual void add() {}
+ virtual bool change_columns(THD *thd, List<Item> &fields);
+ virtual int send_row(List<Item> &field_list);
+ virtual void end_group(void) {}
+ virtual int end_of_records(void);
+ friend Procedure *proc_analyse_init(THD *thd, ORDER *param,
+ select_result *result,
+ List<Item> &field_list);
+};
+
+#endif /* SQL_ANALYSE_INCLUDED */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 07:45:11 +0000