forked from nakagami/firebirdsql
-
Notifications
You must be signed in to change notification settings - Fork 0
/
xsqlvar.go
371 lines (340 loc) · 9.89 KB
/
xsqlvar.go
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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
/*******************************************************************************
The MIT License (MIT)
Copyright (c) 2013-2019 Hajime Nakagami
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*******************************************************************************/
package firebirdsql
import (
"bytes"
"encoding/binary"
"github.com/shopspring/decimal"
"math"
"reflect"
"time"
)
const (
SQL_TYPE_TEXT = 452
SQL_TYPE_VARYING = 448
SQL_TYPE_SHORT = 500
SQL_TYPE_LONG = 496
SQL_TYPE_FLOAT = 482
SQL_TYPE_DOUBLE = 480
SQL_TYPE_D_FLOAT = 530
SQL_TYPE_TIMESTAMP = 510
SQL_TYPE_BLOB = 520
SQL_TYPE_ARRAY = 540
SQL_TYPE_QUAD = 550
SQL_TYPE_TIME = 560
SQL_TYPE_DATE = 570
SQL_TYPE_INT64 = 580
SQL_TYPE_TIMESTAMP_TZ = 32754
SQL_TYPE_TIME_TZ = 32756
SQL_TYPE_DEC_FIXED = 32758
SQL_TYPE_DEC64 = 32760
SQL_TYPE_DEC128 = 32762
SQL_TYPE_BOOLEAN = 32764
SQL_TYPE_NULL = 32766
)
var xsqlvarTypeLength = map[int]int{
SQL_TYPE_VARYING: -1,
SQL_TYPE_SHORT: 4,
SQL_TYPE_LONG: 4,
SQL_TYPE_FLOAT: 4,
SQL_TYPE_TIME: 4,
SQL_TYPE_DATE: 4,
SQL_TYPE_DOUBLE: 8,
SQL_TYPE_TIMESTAMP: 8,
SQL_TYPE_BLOB: 8,
SQL_TYPE_ARRAY: 8,
SQL_TYPE_QUAD: 8,
SQL_TYPE_INT64: 8,
SQL_TYPE_TIMESTAMP_TZ: 10,
SQL_TYPE_TIME_TZ: 6,
SQL_TYPE_DEC64: 8,
SQL_TYPE_DEC128: 16,
SQL_TYPE_DEC_FIXED: 16,
SQL_TYPE_BOOLEAN: 1,
}
var xsqlvarTypeDisplayLength = map[int]int{
SQL_TYPE_VARYING: -1,
SQL_TYPE_SHORT: 6,
SQL_TYPE_LONG: 11,
SQL_TYPE_FLOAT: 17,
SQL_TYPE_TIME: 11,
SQL_TYPE_DATE: 10,
SQL_TYPE_DOUBLE: 17,
SQL_TYPE_TIMESTAMP: 22,
SQL_TYPE_BLOB: 0,
SQL_TYPE_ARRAY: -1,
SQL_TYPE_QUAD: 20,
SQL_TYPE_INT64: 20,
SQL_TYPE_TIMESTAMP_TZ: 28,
SQL_TYPE_TIME_TZ: 17,
SQL_TYPE_DEC64: 16,
SQL_TYPE_DEC128: 34,
SQL_TYPE_DEC_FIXED: 34,
SQL_TYPE_BOOLEAN: 5,
}
var xsqlvarTypeName = map[int]string{
SQL_TYPE_VARYING: "VARYING",
SQL_TYPE_SHORT: "SHORT",
SQL_TYPE_LONG: "LONG",
SQL_TYPE_FLOAT: "FLOAT",
SQL_TYPE_TIME: "TIME",
SQL_TYPE_DATE: "DATE",
SQL_TYPE_DOUBLE: "DOUBLE",
SQL_TYPE_TIMESTAMP: "TIMESTAMP",
SQL_TYPE_BLOB: "BLOB",
SQL_TYPE_ARRAY: "ARRAY",
SQL_TYPE_QUAD: "QUAD",
SQL_TYPE_INT64: "INT64",
SQL_TYPE_TIMESTAMP_TZ: "TIMESTAMP WITH TIMEZONE",
SQL_TYPE_TIME_TZ: "TIME WITH TIMEZONE",
SQL_TYPE_DEC64: "DECFLOAT(16)",
SQL_TYPE_DEC128: "DECFLOAT(34)",
SQL_TYPE_DEC_FIXED: "DECFIXED",
SQL_TYPE_BOOLEAN: "BOOLEAN",
}
type xSQLVAR struct {
wp *wireProtocol
sqltype int
sqlscale int
sqlsubtype int
sqllen int
null_ok bool
fieldname string
relname string
ownname string
aliasname string
}
func (x *xSQLVAR) ioLength() int {
if x.sqltype == SQL_TYPE_TEXT {
return x.sqllen
} else {
return xsqlvarTypeLength[x.sqltype]
}
}
func (x *xSQLVAR) displayLength() int {
if x.sqltype == SQL_TYPE_TEXT {
return x.sqllen
} else {
return xsqlvarTypeDisplayLength[x.sqltype]
}
}
func (x *xSQLVAR) nullable() bool {
return x.null_ok
}
func (x *xSQLVAR) scale() int {
return x.sqlscale
}
func (x *xSQLVAR) hasPrecisionScale() bool {
return (x.sqltype == SQL_TYPE_SHORT || x.sqltype == SQL_TYPE_LONG || x.sqltype == SQL_TYPE_QUAD || x.sqltype == SQL_TYPE_INT64 || x.sqltype == SQL_TYPE_DEC64 || x.sqltype == SQL_TYPE_DEC128 || x.sqltype == SQL_TYPE_DEC_FIXED) && x.sqlscale != 0
}
func (x *xSQLVAR) typename() string {
return xsqlvarTypeName[x.sqltype]
}
func (x *xSQLVAR) scantype() reflect.Type {
switch x.sqltype {
case SQL_TYPE_TEXT:
return reflect.TypeOf("")
case SQL_TYPE_VARYING:
return reflect.TypeOf("")
case SQL_TYPE_SHORT:
if x.sqlscale != 0 {
return reflect.TypeOf(decimal.Decimal{})
}
return reflect.TypeOf(int16(0))
case SQL_TYPE_LONG:
if x.sqlscale != 0 {
return reflect.TypeOf(decimal.Decimal{})
}
return reflect.TypeOf(int32(0))
case SQL_TYPE_INT64:
if x.sqlscale != 0 {
return reflect.TypeOf(decimal.Decimal{})
}
return reflect.TypeOf(int64(0))
case SQL_TYPE_DATE:
return reflect.TypeOf(time.Time{})
case SQL_TYPE_TIME:
return reflect.TypeOf(time.Time{})
case SQL_TYPE_TIMESTAMP:
return reflect.TypeOf(time.Time{})
case SQL_TYPE_FLOAT:
return reflect.TypeOf(float32(0))
case SQL_TYPE_DOUBLE:
return reflect.TypeOf(float64(0))
case SQL_TYPE_BOOLEAN:
return reflect.TypeOf(false)
case SQL_TYPE_BLOB:
return reflect.TypeOf([]byte{})
case SQL_TYPE_TIMESTAMP_TZ:
return reflect.TypeOf(time.Time{})
case SQL_TYPE_TIME_TZ:
return reflect.TypeOf(time.Time{})
case SQL_TYPE_DEC64:
return reflect.TypeOf(decimal.Decimal{})
case SQL_TYPE_DEC128:
return reflect.TypeOf(decimal.Decimal{})
case SQL_TYPE_DEC_FIXED:
return reflect.TypeOf(decimal.Decimal{})
}
return reflect.TypeOf(nil)
}
func (x *xSQLVAR) _parseTimezone(raw_value []byte) *time.Location {
timezone := x.wp.tzNameById[int(bytes_to_bint32(raw_value))]
tz, _ := time.LoadLocation(timezone)
return tz
}
func (x *xSQLVAR) _parseDate(raw_value []byte) (int, int, int) {
nday := int(bytes_to_bint32(raw_value)) + 678882
century := (4*nday - 1) / 146097
nday = 4*nday - 1 - 146097*century
day := nday / 4
nday = (4*day + 3) / 1461
day = 4*day + 3 - 1461*nday
day = (day + 4) / 4
month := (5*day - 3) / 153
day = 5*day - 3 - 153*month
day = (day + 5) / 5
year := 100*century + nday
if month < 10 {
month += 3
} else {
month -= 9
year += 1
}
return year, month, day
}
func (x *xSQLVAR) _parseTime(raw_value []byte) (int, int, int, int) {
n := int(bytes_to_bint32(raw_value))
s := n / 10000
m := s / 60
h := m / 60
m = m % 60
s = s % 60
return h, m, s, (n % 10000) * 100000
}
func (x *xSQLVAR) parseDate(raw_value []byte) time.Time {
tz := time.Local
if x.wp.timezone != "" {
tz, _ = time.LoadLocation(x.wp.timezone)
}
year, month, day := x._parseDate(raw_value)
return time.Date(year, time.Month(month), day, 0, 0, 0, 0, tz)
}
func (x *xSQLVAR) parseTime(raw_value []byte) time.Time {
tz := time.Local
if x.wp.timezone != "" {
tz, _ = time.LoadLocation(x.wp.timezone)
}
h, m, s, n := x._parseTime(raw_value)
return time.Date(0, time.Month(1), 1, h, m, s, n, tz)
}
func (x *xSQLVAR) parseTimestamp(raw_value []byte) time.Time {
tz := time.Local
if x.wp.timezone != "" {
tz, _ = time.LoadLocation(x.wp.timezone)
}
year, month, day := x._parseDate(raw_value[:4])
h, m, s, n := x._parseTime(raw_value[4:])
return time.Date(year, time.Month(month), day, h, m, s, n, tz)
}
func (x *xSQLVAR) parseTimeTz(raw_value []byte) time.Time {
h, m, s, n := x._parseTime(raw_value[:4])
tz := x._parseTimezone(raw_value[4:])
return time.Date(0, time.Month(1), 1, h, m, s, n, tz)
}
func (x *xSQLVAR) parseTimestampTz(raw_value []byte) time.Time {
year, month, day := x._parseDate(raw_value[:4])
h, m, s, n := x._parseTime(raw_value[4:8])
tz := x._parseTimezone(raw_value[8:])
return time.Date(year, time.Month(month), day, h, m, s, n, tz)
}
func (x *xSQLVAR) value(raw_value []byte) (v interface{}, err error) {
switch x.sqltype {
case SQL_TYPE_TEXT:
if x.sqlsubtype == 1 { // OCTETS
v = raw_value
} else {
v = bytes.NewBuffer(raw_value).String()
}
case SQL_TYPE_VARYING:
if x.sqlsubtype == 1 { // OCTETS
v = raw_value
} else {
v = bytes.NewBuffer(raw_value).String()
}
case SQL_TYPE_SHORT:
i16 := int16(bytes_to_bint32(raw_value))
if x.sqlscale > 0 {
v = int64(i16) * int64(math.Pow10(x.sqlscale))
} else if x.sqlscale < 0 {
v = decimal.New(int64(i16), int32(x.sqlscale))
} else {
v = i16
}
case SQL_TYPE_LONG:
i32 := bytes_to_bint32(raw_value)
if x.sqlscale > 0 {
v = int64(i32) * int64(math.Pow10(x.sqlscale))
} else if x.sqlscale < 0 {
v = decimal.New(int64(i32), int32(x.sqlscale))
} else {
v = i32
}
case SQL_TYPE_INT64:
i64 := bytes_to_bint64(raw_value)
if x.sqlscale > 0 {
v = i64 * int64(math.Pow10(x.sqlscale))
} else if x.sqlscale < 0 {
v = decimal.New(int64(i64), int32(x.sqlscale))
} else {
v = i64
}
case SQL_TYPE_DATE:
v = x.parseDate(raw_value)
case SQL_TYPE_TIME:
v = x.parseTime(raw_value)
case SQL_TYPE_TIMESTAMP:
v = x.parseTimestamp(raw_value)
case SQL_TYPE_TIME_TZ:
v = x.parseTimeTz(raw_value)
case SQL_TYPE_TIMESTAMP_TZ:
v = x.parseTimestampTz(raw_value)
case SQL_TYPE_FLOAT:
var f32 float32
b := bytes.NewReader(raw_value)
err = binary.Read(b, binary.BigEndian, &f32)
v = f32
case SQL_TYPE_DOUBLE:
b := bytes.NewReader(raw_value)
var f64 float64
err = binary.Read(b, binary.BigEndian, &f64)
v = f64
case SQL_TYPE_BOOLEAN:
v = raw_value[0] != 0
case SQL_TYPE_BLOB:
v = raw_value
case SQL_TYPE_DEC_FIXED:
v = decimalFixedToDecimal(raw_value, int32(x.sqlscale))
case SQL_TYPE_DEC64:
v = decimal64ToDecimal(raw_value)
case SQL_TYPE_DEC128:
v = decimal128ToDecimal(raw_value)
}
return
}