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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#include "selectcommand.h"
#include "error.h"
#include "column.h"
#include <sqlext.h>
ODBC::SelectCommand::SelectCommand(const Connection& c, String s) :
Command(c, s)
{
}
ODBC::SelectCommand::~SelectCommand()
{
for (Columns::iterator i = columns.begin(); i != columns.end(); i++) {
if (*i) {
delete *i;
}
}
RETCODE rc;
if ((rc = SQLCloseCursor(hStmt)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLCloseCursor",
__FUNCTION__);
}
}
bool
ODBC::SelectCommand::fetch()
{
if (columns.size() == 0) {
execute();
}
RETCODE rc = SQLFetch(hStmt);
switch (rc) {
case SQL_SUCCESS:
for (Columns::iterator col = columns.begin(); col != columns.end(); col++) {
(*col)->fresh = true;
}
return true;
case SQL_NO_DATA:
return false;
default:
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLFetch",
__FUNCTION__);
}
}
// This is here cos it needs to be referenced by (and only by) execute
template <class t>
ODBC::_Column<t>::_Column(String n, unsigned int i) : Column(n, i)
{
}
void
ODBC::SelectCommand::execute()
{
RETCODE rc = SQLExecute(hStmt);
if (rc != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLExecute",
__FUNCTION__);
}
SQLSMALLINT colCount;
if ((rc = SQLNumResultCols(hStmt, &colCount)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLNumResultCols",
__FUNCTION__);
}
if (colCount < 1) {
throw Error("%s: No result columns", __FUNCTION__);
}
columns.resize(colCount);
for (int col = 0; col < colCount; col++) {
SQLCHAR colName[300];
SQLSMALLINT nameLen, dp, nullable, bindType;
SQLUINTEGER bindSize;
int sqlcol = col + 1;
if ((rc = SQLDescribeCol(hStmt, sqlcol, colName, sizeof(colName), &nameLen, &bindType,
&bindSize, &dp, &nullable)) != SQL_SUCCESS) {
throw Error(rc, SQL_HANDLE_STMT, hStmt, "%s: SQLDescribeCol for %d",
__FUNCTION__, col);
}
colName[nameLen] = '\0';
switch (bindType) {
case -9:
case SQL_CHAR:
case SQL_VARCHAR:
case SQL_LONGVARCHAR:
{
_Column<SQLCHAR*>* s = new _Column<SQLCHAR*>(colName, col);
s->value = new SQLCHAR[bindSize + 1];
s->bind(hStmt, sqlcol, SQL_C_CHAR, s->value, bindSize + 1);
columns[col] = s;
break;
}
case SQL_DECIMAL:
case SQL_NUMERIC:
case SQL_REAL:
case SQL_FLOAT:
case SQL_DOUBLE:
{
_Column<SQLDOUBLE>* d = new _Column<SQLDOUBLE>(colName, col);
d->bind(hStmt, sqlcol, SQL_C_DOUBLE, &d->value, sizeof(double));
columns[col] = d;
break;
}
case SQL_SMALLINT:
case SQL_INTEGER:
case SQL_TINYINT:
case SQL_BIGINT:
{
_Column<SQLINTEGER>* i = new _Column<SQLINTEGER>(colName, col);
i->bind(hStmt, sqlcol, SQL_C_LONG, &i->value, sizeof(int));
columns[col] = i;
break;
}
case 11:
case SQL_DATETIME:
case SQL_TYPE_TIME:
case SQL_TYPE_DATE:
case SQL_TYPE_TIMESTAMP:
{
_Column<TimeTypePair>* t = new _Column<TimeTypePair>(colName, col);
t->bind(hStmt, sqlcol, SQL_C_TYPE_TIMESTAMP, &t->value.sql(),
sizeof(SQL_TIMESTAMP_STRUCT));
columns[col] = t;
break;
}
default:
throw Error(
"%s: Bad column type: idx=%d, name=%s, type=%d, size=%ld, dp=%d, null=%d",
__FUNCTION__, col, colName, bindType, bindSize, dp, nullable);
break;
};
}
}
const ODBC::Column&
ODBC::SelectCommand::operator[](unsigned int col) const
{
if (col > columns.size()) {
throw ODBC::Error("Column index (%u) out of range", col);
}
return *columns[col];
}
const ODBC::Column&
ODBC::SelectCommand::operator[](const String & colName) const
{
for (Columns::const_iterator col = columns.begin(); col != columns.end(); col++) {
if ((*col)->name == colName) {
return **col;
}
}
throw ODBC::Error("Column (%s) does not exist", colName.c_str());
}
unsigned int
ODBC::SelectCommand::columnCount() const
{
return columns.size();
}
|
