MySQL 8.0.29
Source Code Documentation
print_utils.h
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22
23#ifndef SQL_JOIN_OPTIMIZER_PRINT_UTILS
24#define SQL_JOIN_OPTIMIZER_PRINT_UTILS 1
25
26#include "my_compiler.h"
27#include "sql/item.h"
28
29#include <string>
30
32
33/**
34 Like sprintf, but returns an std::string.
35 This is not the most efficient of formatting functions,
36 but it is only intended for debugging/tracing use.
37 */
38std::string StringPrintf(const char *fmt, ...)
39 MY_ATTRIBUTE((format(printf, 1, 2)));
40
41template <class T>
42std::string ItemsToString(const T &items) {
43 std::string result = "(none)";
44 bool first = true;
45 for (Item *item : items) {
46 if (first) {
47 result = ItemToString(item);
48 first = false;
49 } else {
50 result += " AND ";
51 result += ItemToString(item);
52 }
53 }
54 return result;
55}
56
57std::string GenerateExpressionLabel(const RelationalExpression *expr);
58
59#endif // SQL_JOIN_OPTIMIZER_PRINT_UTILS
Base class that is used to represent any kind of expression in a relational query.
Definition: item.h:802
string ItemToString(const Item *item)
Definition: item.cc:10680
Header for compiler-dependent features.
Definition: varlen_sort.h:183
struct result result
Definition: result.h:33
std::string ItemsToString(const T &items)
Definition: print_utils.h:42
std::string StringPrintf(const char *fmt,...)
Like sprintf, but returns an std::string.
Definition: print_utils.cc:39
std::string GenerateExpressionLabel(const RelationalExpression *expr)
Definition: print_utils.cc:61
Represents an expression tree in the relational algebra of joins.
Definition: relational_expression.h:85
Definition: result.h:29