MySQL 8.4.3
Source Code Documentation
item_gtid_func.h
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23
24/* This file defines all string functions */
25#ifndef ITEM_GTID_INCLUDED
26#define ITEM_GTID_INCLUDED
27
28#include "item_func.h"
29#include "item_strfunc.h"
30#include "sql/parse_location.h" // POS
31#include "sql_string.h"
32
33class Item;
34class THD;
35struct Parse_context;
36
37/**
38 This class is used for implementing the new wait_for_executed_gtid_set
39 function and the functions related to them. This new function is independent
40 of the slave threads.
41*/
44
46
47 public:
49 : Item_int_func(pos, a) {
50 null_on_null = false;
51 }
53 : Item_int_func(pos, a, b) {
54 null_on_null = false;
55 }
56
57 bool do_itemize(Parse_context *pc, Item **res) override;
58 longlong val_int() override;
59 const char *func_name() const override {
60 return "wait_for_executed_gtid_set";
61 }
62 bool resolve_type(THD *thd) override {
63 if (param_type_is_default(thd, 0, 1)) return true;
64 if (param_type_is_default(thd, 1, 2, MYSQL_TYPE_DOUBLE)) return true;
65 set_nullable(true);
66 return false;
67 }
68};
69
73
74 public:
75 Item_func_gtid_subset(const POS &pos, Item *a, Item *b)
76 : Item_int_func(pos, a, b) {}
77 longlong val_int() override;
78 const char *func_name() const override { return "gtid_subset"; }
79 bool resolve_type(THD *thd) override {
80 if (param_type_is_default(thd, 0, ~0U)) return true;
81 return false;
82 }
83 bool is_bool_func() const override { return true; }
84};
85
88
89 public:
91 : Item_str_ascii_func(pos, a, b) {}
92 bool resolve_type(THD *) override;
93 const char *func_name() const override { return "gtid_subtract"; }
94 String *val_str_ascii(String *) override;
95};
96
97#endif /* ITEM_GTID_INCLUDED */
Definition: item_gtid_func.h:70
bool is_bool_func() const override
Definition: item_gtid_func.h:83
longlong val_int() override
Return 1 if both arguments are Gtid_sets and the first is a subset of the second.
Definition: item_gtid_func.cc:128
String buf1
Definition: item_gtid_func.h:71
bool resolve_type(THD *thd) override
Resolve type-related information for this item, such as result field type, maximum size,...
Definition: item_gtid_func.h:79
Item_func_gtid_subset(const POS &pos, Item *a, Item *b)
Definition: item_gtid_func.h:75
const char * func_name() const override
Definition: item_gtid_func.h:78
String buf2
Definition: item_gtid_func.h:72
Definition: item_gtid_func.h:86
const char * func_name() const override
Definition: item_gtid_func.h:93
Item_func_gtid_subtract(const POS &pos, Item *a, Item *b)
Definition: item_gtid_func.h:90
String buf1
Definition: item_gtid_func.h:87
String * val_str_ascii(String *) override
Definition: item_gtid_func.cc:181
bool resolve_type(THD *) override
Resolve type-related information for this item, such as result field type, maximum size,...
Definition: item_gtid_func.cc:163
String buf2
Definition: item_gtid_func.h:87
bool param_type_is_default(THD *thd, uint start, uint end, uint step, enum_field_types def)
For arguments of this Item_func ("args" array), in range [start, start+step, start+2*step,...
Definition: item_func.cc:527
bool null_on_null
Affects how to determine that NULL argument implies a NULL function return.
Definition: item_func.h:164
Definition: item_func.h:983
Definition: item_strfunc.h:148
This class is used for implementing the new wait_for_executed_gtid_set function and the functions rel...
Definition: item_gtid_func.h:42
Item_int_func super
Definition: item_gtid_func.h:43
const char * func_name() const override
Definition: item_gtid_func.h:59
bool do_itemize(Parse_context *pc, Item **res) override
The core function that does the actual itemization.
Definition: item_gtid_func.cc:36
Item_wait_for_executed_gtid_set(const POS &pos, Item *a, Item *b)
Definition: item_gtid_func.h:52
longlong val_int() override
Wait until the given gtid_set is found in the executed gtid_set independent of the slave threads.
Definition: item_gtid_func.cc:54
bool resolve_type(THD *thd) override
Resolve type-related information for this item, such as result field type, maximum size,...
Definition: item_gtid_func.h:62
String value
Definition: item_gtid_func.h:45
Item_wait_for_executed_gtid_set(const POS &pos, Item *a)
Definition: item_gtid_func.h:48
Base class that is used to represent any kind of expression in a relational query.
Definition: item.h:936
void set_nullable(bool nullable)
Definition: item.h:3642
Using this class is fraught with peril, and you need to be very careful when doing so.
Definition: sql_string.h:167
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
@ MYSQL_TYPE_DOUBLE
Definition: field_types.h:61
long long int longlong
Definition: my_inttypes.h:55
Our own string classes, used pervasively throughout the executor.
Bison "location" class.
Definition: parse_location.h:43
Environment data for the contextualization phase.
Definition: parse_tree_node_base.h:420
Definition: dtoa.cc:588