1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
#pragma once
#include <database/statement.hpp>
#include <logger/logger.hpp>
#include <libpq-fe.h>
class PostgresqlStatement: public Statement
{
public:
PostgresqlStatement(std::string body, PGconn*const conn):
body(std::move(body)),
conn(conn)
{}
~PostgresqlStatement()
{
PQclear(this->result);
this->result = nullptr;
}
PostgresqlStatement(const PostgresqlStatement&) = delete;
PostgresqlStatement& operator=(const PostgresqlStatement&) = delete;
PostgresqlStatement(PostgresqlStatement&& other) = delete;
PostgresqlStatement& operator=(PostgresqlStatement&& other) = delete;
StepResult step() override final
{
if (!this->executed)
{
this->current_tuple = 0;
this->executed = true;
if (!this->execute())
return StepResult::Error;
}
else
{
this->current_tuple++;
}
if (this->current_tuple < PQntuples(this->result))
return StepResult::Row;
return StepResult::Done;
}
int64_t get_column_int64(const int col) override
{
const char* result = PQgetvalue(this->result, this->current_tuple, col);
std::istringstream iss;
iss.str(result);
int64_t res;
iss >> res;
return res;
}
std::string get_column_text(const int col) override
{
const char* result = PQgetvalue(this->result, this->current_tuple, col);
return result;
}
int get_column_int(const int col) override
{
const char* result = PQgetvalue(this->result, this->current_tuple, col);
std::istringstream iss;
iss.str(result);
int res;
iss >> res;
return res;
}
void bind(std::vector<std::string> params) override
{
this->params = std::move(params);
}
bool bind_text(const int, const std::string& data) override
{
this->params.push_back(data);
return true;
}
bool bind_int64(const int, const std::int64_t value) override
{
this->params.push_back(std::to_string(value));
return true;
}
bool bind_null(const int) override
{
this->params.push_back("NULL");
return true;
}
private:
private:
bool execute()
{
std::vector<const char*> params;
params.reserve(this->params.size());
for (const auto& param: this->params)
{
log_debug("param:", param);
params.push_back(param.data());
}
log_debug("body: ", body);
const int param_size = static_cast<int>(this->params.size());
this->result = PQexecParams(this->conn, this->body.data(),
param_size,
nullptr,
params.data(),
nullptr,
nullptr,
0);
const auto status = PQresultStatus(this->result);
if (status == PGRES_TUPLES_OK)
{
log_debug("PGRES_TUPLES_OK");
}
else if (status != PGRES_COMMAND_OK)
{
log_error("Failed to execute command: ", PQresultErrorMessage(this->result));
return false;
}
return true;
}
bool executed{false};
std::string body;
PGconn*const conn;
std::vector<std::string> params;
PGresult* result{nullptr};
int current_tuple{0};
};
|
