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
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877 | ------------------------------------------------------------------------------
-- G N A T C O L L --
-- --
-- Copyright (C) 2005-2021, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Ada.Calendar; use Ada.Calendar;
with Ada.Strings.Fixed; use Ada.Strings.Fixed;
with Ada.Strings.Hash; use Ada.Strings;
with Ada.Strings.Maps; use Ada.Strings.Maps;
with Ada.Unchecked_Deallocation;
with GNAT.Calendar.Time_IO; use GNAT.Calendar.Time_IO;
with GNAT.Strings; use GNAT.Strings;
with GNATCOLL.Utils; use GNATCOLL.Utils;
package body GNATCOLL.SQL_Impl is
use Field_List, Table_Sets, Assignment_Lists, SQL_Criteria_Pointers,
Field_Pointers;
Comparison_Equal : aliased constant String := "=";
Comparison_Different : aliased constant String := "<>";
Comparison_Less : aliased constant String := "<";
Comparison_Less_Equal : aliased constant String := "<=";
Comparison_Greater : aliased constant String := ">";
Comparison_Greater_Equal : aliased constant String := ">=";
--------------------------
-- Named field data --
--------------------------
-- Instantiation of field_data for specific types of fields, created for
-- instance via Expression, From_String, or operators on time. Such fields
-- are still typed
type Field_Kind is (Field_Std, Field_Operator, Field_Parameter);
-- The type of the field:
-- Field_Std: Str_Value is directly the text of the field
-- Field_Operator: Str_Value is the operator, that acts on several
-- fields ("-" for instance")
-- Field_Parameter: the field's exact value is unknown, and will be
-- substituted at runtime (for instance "?1" in sqlite3). Str_Value
-- is then the index of the field.
type Named_Field_Internal (Typ : Field_Kind)
is new SQL_Field_Internal with record
Table : Table_Names := No_Names;
case Typ is
when Field_Std =>
Str_Value : GNAT.Strings.String_Access;
-- The expression representing the field in SQL. See Field_Type
-- for more information
when Field_Operator =>
Op_Value : GNAT.Strings.String_Access;
List : SQL_Field_List;
when Field_Parameter =>
Index : Positive;
Param_Type : SQL_Parameter_Base;
end case;
end record;
overriding procedure Free (Self : in out Named_Field_Internal);
overriding function To_String
(Self : Named_Field_Internal;
Format : Formatter'Class;
Long : Boolean) return String;
overriding procedure Append_Tables
(Self : Named_Field_Internal; To : in out Table_Sets.Set);
overriding procedure Append_If_Not_Aggregate
(Self : access Named_Field_Internal;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean);
procedure Assign
(R : out SQL_Assignment;
Field : SQL_Field'Class;
Value : Named_Field_Internal'Class);
procedure Unassign
(R : out SQL_Assignment;
Field : SQL_Field'Class);
-- Assign Value to Field (or set field to NULL if Value is null).
-- On exit, Value belongs to R and should not be freed by the caller.
---------------------
-- Function fields --
---------------------
type Function_Field is new SQL_Field_Internal with record
Prefix, Suffix : GNAT.Strings.String_Access;
To_Field : SQL_Field_Pointer;
end record;
overriding procedure Free (Self : in out Function_Field);
overriding function To_String
(Self : Function_Field;
Format : Formatter'Class;
Long : Boolean) return String;
overriding procedure Append_Tables
(Self : Function_Field; To : in out Table_Sets.Set);
overriding procedure Append_If_Not_Aggregate
(Self : access Function_Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean);
-- A field that applies a function (via Prefix .. Suffix) to another field
----------------------
-- Function2 fields --
----------------------
type Function2_Field is new SQL_Field_Internal with record
Prefix, Suffix : GNAT.Strings.String_Access;
Field1, Field2 : SQL_Field_Pointer;
end record;
overriding procedure Free (Self : in out Function2_Field);
overriding function To_String
(Self : Function2_Field;
Format : Formatter'Class;
Long : Boolean) return String;
overriding procedure Append_Tables
(Self : Function2_Field; To : in out Table_Sets.Set);
overriding procedure Append_If_Not_Aggregate
(Self : access Function2_Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean);
-- A field that applies a function (via Prefix .. Suffix) to another field
--------------
-- Criteria --
--------------
type Comparison_Criteria is new SQL_Criteria_Data with record
Op, Suffix : Cst_String_Access;
Arg1, Arg2 : SQL_Field_Pointer;
end record;
overriding function To_String
(Self : Comparison_Criteria;
Format : Formatter'Class;
Long : Boolean := True) return String;
overriding procedure Append_Tables
(Self : Comparison_Criteria; To : in out Table_Sets.Set);
overriding procedure Append_If_Not_Aggregate
(Self : Comparison_Criteria;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean);
----------------
-- Data_Field --
----------------
package body Data_Fields is
overriding function To_String
(Self : Field;
Format : Formatter'Class;
Long : Boolean := True) return String is
begin
if not Self.Data.Is_Null then
return To_String (Self.Data.Get.Element.all, Format, Long);
else
return "";
end if;
end To_String;
overriding procedure Append_Tables
(Self : Field; To : in out Table_Sets.Set) is
begin
if not Self.Data.Is_Null then
Append_Tables (Self.Data.Get.Element.all, To);
end if;
end Append_Tables;
overriding procedure Append_If_Not_Aggregate
(Self : Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean)
is
begin
if not Self.Data.Is_Null then
Append_If_Not_Aggregate (Self.Data.Get.Element, To, Is_Aggregate);
end if;
end Append_If_Not_Aggregate;
end Data_Fields;
package Any_Fields is new Data_Fields (SQL_Field);
-------------------
-- Instance_Name --
-------------------
function Instance_Name (Names : Table_Names) return String is
begin
if Names.Instance = null then
if Names.Instance_Index = -1 then
if Names.Name = null then
return "";
else
return Names.Name.all;
end if;
else
return Names.Name (Names.Name'First)
& Image (Names.Instance_Index, Min_Width => 1);
end if;
else
return Names.Instance.all;
end if;
end Instance_Name;
----------
-- Hash --
----------
function Hash (Self : Table_Names) return Ada.Containers.Hash_Type is
begin
return Ada.Strings.Hash (Instance_Name (Self));
end Hash;
-------------------
-- Free_Dispatch --
-------------------
procedure Free_Dispatch (Self : in out SQL_Criteria_Data'Class) is
begin
Free (Self);
end Free_Dispatch;
-------------------
-- Free_Dispatch --
-------------------
procedure Free_Dispatch (Self : in out SQL_Field_Internal'Class) is
begin
Free (Self);
end Free_Dispatch;
--------------
-- Is_Empty --
--------------
function Is_Empty (List : SQL_Field_List) return Boolean is
begin
return List.List.Is_Empty;
end Is_Empty;
------------
-- Length --
------------
function Length (List : SQL_Field_List) return Natural is
begin
return Natural (List.List.Length);
end Length;
---------------
-- To_String --
---------------
overriding function To_String
(Self : SQL_Field_List;
Format : Formatter'Class;
Long : Boolean := True) return String
is
C : Field_List.Cursor := First (Self.List);
Result : Unbounded_String;
begin
if Has_Element (C) then
Append (Result, To_String (Element (C), Format, Long));
Next (C);
end if;
while Has_Element (C) loop
Append (Result, ", ");
Append (Result, To_String (Element (C), Format, Long));
Next (C);
end loop;
return To_String (Result);
end To_String;
---------------
-- To_String --
---------------
overriding function To_String
(Self : SQL_Field;
Format : Formatter'Class;
Long : Boolean := True) return String
is
pragma Unreferenced (Format);
begin
if not Long then
return Self.Name.all;
else
declare
N : constant String := Instance_Name
((Name => Self.Table,
Instance => Self.Instance,
Instance_Index => Self.Instance_Index));
begin
if N /= "" then
return N & "." & Self.Name.all;
else
-- Self.Table could be null in the case of the Null_Field_*
-- constants
return Self.Name.all;
end if;
end;
end if;
end To_String;
----------
-- Free --
----------
procedure Free (Self : in out Named_Field_Internal) is
begin
case Self.Typ is
when Field_Std => Free (Self.Str_Value);
when Field_Operator => Free (Self.Op_Value);
when Field_Parameter => null;
end case;
end Free;
---------------
-- To_String --
---------------
function To_String
(Self : Named_Field_Internal;
Format : Formatter'Class;
Long : Boolean) return String
is
Result : Unbounded_String;
C : Field_List.Cursor;
begin
case Self.Typ is
when Field_Std =>
if Self.Table = No_Names then
return Self.Str_Value.all;
elsif Long then
if Self.Table.Instance = null then
return Self.Table.Name.all & '.' & Self.Str_Value.all;
else
return Self.Table.Instance.all & '.' & Self.Str_Value.all;
end if;
else
return Self.Str_Value.all;
end if;
when Field_Operator =>
C := First (Self.List.List);
Result := To_Unbounded_String (To_String (Element (C), Format));
Next (C);
while Has_Element (C) loop
Result := Result & " " & Self.Op_Value.all & " "
& To_String (Element (C), Format);
Next (C);
end loop;
return To_String (Result);
when Field_Parameter =>
return Self.Param_Type.Get.Type_String (Self.Index, Format);
end case;
end To_String;
-------------------
-- Append_Tables --
-------------------
procedure Append_Tables
(Self : Named_Field_Internal; To : in out Table_Sets.Set) is
begin
if Self.Table /= No_Names then
Include (To, Self.Table);
end if;
end Append_Tables;
-------------------
-- Append_Tables --
-------------------
overriding procedure Append_Tables
(Self : Function_Field; To : in out Table_Sets.Set) is
begin
Append_Tables (Self.To_Field.Get.Element.all, To);
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
overriding procedure Append_If_Not_Aggregate
(Self : access Function_Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean)
is
begin
Append_If_Not_Aggregate
(Self.To_Field.Get.Element.all, To, Is_Aggregate);
end Append_If_Not_Aggregate;
-------------------
-- Append_Tables --
-------------------
overriding procedure Append_Tables
(Self : Function2_Field; To : in out Table_Sets.Set) is
begin
Append_Tables (Self.Field1.Get.Element.all, To);
Append_Tables (Self.Field2.Get.Element.all, To);
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
overriding procedure Append_If_Not_Aggregate
(Self : access Function2_Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean)
is
begin
Append_If_Not_Aggregate
(Self.Field1.Get.Element.all, To, Is_Aggregate);
Append_If_Not_Aggregate
(Self.Field2.Get.Element.all, To, Is_Aggregate);
end Append_If_Not_Aggregate;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
procedure Append_If_Not_Aggregate
(Self : access Named_Field_Internal;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean)
is
C : Field_List.Cursor;
F : Field_Pointers.Ref;
begin
if Self.Typ = Field_Operator then
C := First (Self.List.List);
while Has_Element (C) loop
Append_If_Not_Aggregate (Element (C), To, Is_Aggregate);
Next (C);
end loop;
end if;
-- We create a SQL_Field_Text, but it might be any other type.
-- This isn't really relevant, however, since the exact type is not used
-- later on.
if Self.Table /= No_Names then
F.From_Element (Field_Pointers.Element_Access (Self));
Append
(To.List, Any_Fields.Field'
(Table => Self.Table.Name,
Instance => Self.Table.Instance,
Instance_Index => Self.Table.Instance_Index,
Name => null,
Data => F));
end if;
end Append_If_Not_Aggregate;
------------
-- Append --
------------
procedure Append
(List : in out SQL_Field_List; Field : SQL_Field'Class) is
begin
Append (List.List, Field);
end Append;
---------
-- "&" --
---------
function "&" (Left, Right : SQL_Field'Class) return SQL_Field_List is
Result : SQL_Field_List;
begin
Append (Result.List, Left);
Append (Result.List, Right);
return Result;
end "&";
---------
-- "&" --
---------
function "&"
(Left : SQL_Field_List; Right : SQL_Field'Class) return SQL_Field_List
is
Result : SQL_Field_List;
begin
Result.List := Left.List; -- Does a copy, so we do not modify Left
Append (Result.List, Right);
return Result;
end "&";
---------
-- "&" --
---------
function "&"
(Left : SQL_Field'Class; Right : SQL_Field_List) return SQL_Field_List
is
Result : SQL_Field_List;
begin
Result.List := Right.List; -- Does a copy so that we do not modify Right
Prepend (Result.List, Left);
return Result;
end "&";
---------
-- "&" --
---------
function "&"
(Left, Right : SQL_Field_List) return SQL_Field_List
is
Result : SQL_Field_List;
C : Field_List.Cursor := First (Right.List);
begin
Result.List := Left.List; -- Does a copy, don't modify Left
while Has_Element (C) loop
Append (Result.List, Element (C));
Next (C);
end loop;
return Result;
end "&";
---------
-- "+" --
---------
function "+" (Left : SQL_Field'Class) return SQL_Field_List is
Result : SQL_Field_List;
begin
Append (Result.List, Left);
return Result;
end "+";
-------------------
-- Append_Tables --
-------------------
procedure Append_Tables (Self : SQL_Field; To : in out Table_Sets.Set) is
begin
if Self.Table /= null then
Include (To, (Name => Self.Table, Instance => Self.Instance,
Instance_Index => Self.Instance_Index));
end if;
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
procedure Append_If_Not_Aggregate
(Self : SQL_Field;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean)
is
pragma Unreferenced (Is_Aggregate);
begin
-- Ignore constant fields (NULL,...)
if Self.Table /= null then
-- Check that field already exists in list
for F of To.List loop
if SQL_Field (F) = Self then
-- Do not need the same field twice
return;
end if;
end loop;
Append (To.List, Self);
end if;
end Append_If_Not_Aggregate;
---------------
-- To_String --
---------------
function To_String
(Self : SQL_Criteria;
Format : Formatter'Class;
Long : Boolean := True) return String
is
begin
if not Self.Criteria.Is_Null then
return To_String (Self.Criteria.Get.Element.all, Format, Long);
else
return "";
end if;
end To_String;
-------------------
-- Append_Tables --
-------------------
procedure Append_Tables (Self : SQL_Criteria; To : in out Table_Sets.Set) is
begin
if not Self.Criteria.Is_Null then
Append_Tables (Self.Criteria.Get.Element.all, To);
end if;
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
procedure Append_If_Not_Aggregate
(Self : SQL_Criteria;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean) is
begin
if not Self.Criteria.Is_Null then
Append_If_Not_Aggregate
(Self.Criteria.Get.Element.all, To, Is_Aggregate);
end if;
end Append_If_Not_Aggregate;
--------------
-- Set_Data --
--------------
procedure Set_Data
(Self : in out SQL_Criteria; Data : SQL_Criteria_Data'Class) is
begin
Self.Criteria.Set (Data);
end Set_Data;
--------------
-- Get_Data --
--------------
function Get_Data (Self : SQL_Criteria) return SQL_Criteria_Data_Access is
begin
return Self.Criteria.Unchecked_Get;
end Get_Data;
---------
-- "+" --
---------
function "+" (Field : SQL_Field'Class) return SQL_Field_Pointer is
begin
return R : SQL_Field_Pointer do
R.Set (Field);
end return;
end "+";
---------------
-- To_String --
---------------
overriding function To_String
(Self : Comparison_Criteria;
Format : Formatter'Class;
Long : Boolean := True) return String
is
Arg2 : constant String := To_String (Self.Arg2, Format, Long => Long);
begin
-- ??? Could we do this test when we create the comparison, that would
-- be more efficient.
if Self.Op.all = "="
and then Arg2 = "TRUE"
then
return To_String (Self.Arg1, Format, Long => Long);
elsif Self.Op.all = "="
and then Arg2 = "FALSE"
then
return "not " & To_String (Self.Arg1, Format, Long => Long);
elsif Self.Suffix /= null then
if Self.Arg1 = No_Field_Pointer then
return Self.Op.all & Arg2 & Self.Suffix.all;
else
return To_String (Self.Arg1, Format, Long => Long)
& Self.Op.all & Arg2 & Self.Suffix.all;
end if;
else
if Self.Arg1 = No_Field_Pointer then
return Self.Op.all & Arg2;
else
return To_String (Self.Arg1, Format, Long => Long)
& Self.Op.all & Arg2;
end if;
end if;
end To_String;
-------------------
-- Append_Tables --
-------------------
overriding procedure Append_Tables
(Self : Comparison_Criteria; To : in out Table_Sets.Set) is
begin
Append_Tables (Self.Arg1, To);
Append_Tables (Self.Arg2, To);
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
overriding procedure Append_If_Not_Aggregate
(Self : Comparison_Criteria;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean) is
begin
Append_If_Not_Aggregate (Self.Arg1, To, Is_Aggregate);
Append_If_Not_Aggregate (Self.Arg2, To, Is_Aggregate);
end Append_If_Not_Aggregate;
-------------
-- Compare --
-------------
function Compare
(Left, Right : SQL_Field'Class;
Op : Cst_String_Access;
Suffix : Cst_String_Access := null) return SQL_Criteria
is
Data : constant Comparison_Criteria :=
(SQL_Criteria_Data with
Op => Op, Suffix => Suffix, Arg1 => +Left, Arg2 => +Right);
Result : SQL_Criteria;
begin
Set_Data (Result, Data);
return Result;
end Compare;
--------------
-- Compare1 --
--------------
function Compare1
(Field : SQL_Field'Class;
Op : Cst_String_Access;
Suffix : Cst_String_Access := null) return SQL_Criteria
is
Data : constant Comparison_Criteria :=
(SQL_Criteria_Data with
Op => Op, Suffix => Suffix,
Arg1 => No_Field_Pointer,
Arg2 => +Field);
Result : SQL_Criteria;
begin
Set_Data (Result, Data);
return Result;
end Compare1;
---------------
-- To_String --
---------------
function To_String
(Self : SQL_Field_Pointer;
Format : Formatter'Class;
Long : Boolean) return String is
begin
return To_String (Self.Get.Element.all, Format, Long);
end To_String;
-------------------
-- Append_Tables --
-------------------
procedure Append_Tables
(Self : SQL_Field_Pointer; To : in out Table_Sets.Set) is
begin
if not Self.Is_Null then
Append_Tables (Self.Get.Element.all, To);
end if;
end Append_Tables;
-----------------------------
-- Append_If_Not_Aggregate --
-----------------------------
procedure Append_If_Not_Aggregate
(Self : SQL_Field_Pointer;
To : in out SQL_Field_List'Class;
Is_Aggregate : in out Boolean) is
begin
if not Self.Is_Null then
Append_If_Not_Aggregate (Self.Get.Element.all, To, Is_Aggregate);
end if;
end Append_If_Not_Aggregate;
-----------
-- First --
-----------
function First (List : SQL_Field_List) return Field_List.Cursor is
begin
return First (List.List);
end First;
------------
-- Append --
------------
procedure Append
(List : in out SQL_Field_List'Class; Field : SQL_Field_Pointer) is
begin
if not Field.Is_Null then
Append (List.List, Field.Get.Element.all);
end if;
end Append;
-------------------
-- Append_Tables --
-------------------
procedure Append_Tables
(Self : SQL_Assignment; To : in out Table_Sets.Set)
is
C : Assignment_Lists.Cursor := First (Self.List);
begin
while Has_Element (C) loop
Append_Tables (Element (C).Field, To);
Append_Tables (Element (C).To_Field, To);
Next (C);
end loop;
end Append_Tables;
---------------
-- To_String --
---------------
function To_String
(Self : SQL_Assignment;
Format : Formatter'Class;
With_Field : Boolean) return String
is
Result : Unbounded_String;
C : Assignment_Lists.Cursor := First (Self.List);
Data : Assignment_Item;
begin
while Has_Element (C) loop
Data := Element (C);
if Result /= Null_Unbounded_String then
Append (Result, ", ");
end if;
if Data.To_Field /= No_Field_Pointer then
if With_Field then
Append
(Result, To_String (Data.Field, Format, Long => False)
& "=" & To_String (Data.To_Field, Format, Long => True));
else
Append
(Result, To_String (Data.To_Field, Format, Long => True));
end if;
elsif With_Field then
Append
(Result, To_String (Data.Field, Format, Long => False)
& "=" & Null_String);
else
Append (Result, Null_String);
end if;
Next (C);
end loop;
return To_String (Result);
end To_String;
-------------
-- To_List --
-------------
procedure To_List (Self : SQL_Assignment; List : out SQL_Field_List) is
N : Field_Pointers.Ref;
C : Assignment_Lists.Cursor := First (Self.List);
Data : Assignment_Item;
begin
while Has_Element (C) loop
Data := Element (C);
if Data.To_Field /= No_Field_Pointer then
Append (List, Data.To_Field);
else
-- Setting a field to null
N.Set
(Named_Field_Internal'
(SQL_Field_Internal with Typ => Field_Std, others => <>));
Named_Field_Internal (N.Get.Element.all).Str_Value :=
new String'(Null_String);
List := List
& Any_Fields.Field'
(Table => null,
Instance => null,
Instance_Index => -1,
Name => null,
Data => N);
end if;
Next (C);
end loop;
end To_List;
----------------
-- Get_Fields --
----------------
procedure Get_Fields (Self : SQL_Assignment; List : out SQL_Field_List) is
C : Assignment_Lists.Cursor := First (Self.List);
begin
while Has_Element (C) loop
Append (List, Element (C).Field);
Next (C);
end loop;
end Get_Fields;
---------
-- "&" --
---------
function "&" (Left, Right : SQL_Assignment) return SQL_Assignment is
Result : SQL_Assignment;
C : Assignment_Lists.Cursor := First (Right.List);
begin
Result.List := Left.List;
while Has_Element (C) loop
Append (Result.List, Element (C));
Next (C);
end loop;
return Result;
end "&";
--------------
-- Unassign --
--------------
procedure Unassign
(R : out SQL_Assignment;
Field : SQL_Field'Class)
is
begin
Append (R.List, Assignment_Item'(+Field, No_Field_Pointer));
end Unassign;
------------
-- Assign --
------------
procedure Assign
(R : out SQL_Assignment;
Field : SQL_Field'Class;
Value : Named_Field_Internal'Class)
is
function To_Ref return Field_Pointers.Ref;
------------
-- To_Ref --
------------
function To_Ref return Field_Pointers.Ref is
Result : Field_Pointers.Ref;
begin
Result.Set (Value);
return Result;
end To_Ref;
begin
declare
A : constant Assignment_Item :=
(Field => +Field,
To_Field => +Any_Fields.Field'
(Table => null,
Instance => null,
Instance_Index => -1,
Name => null,
Data => To_Ref));
begin
Append (R.List, A);
end;
end Assign;
----------
-- Free --
----------
overriding procedure Free (Self : in out Function_Field) is
begin
Free (Self.Prefix);
Free (Self.Suffix);
Free (SQL_Field_Internal (Self));
end Free;
----------
-- Free --
----------
overriding procedure Free (Self : in out Function2_Field) is
begin
Free (Self.Prefix);
Free (Self.Suffix);
Free (SQL_Field_Internal (Self));
end Free;
---------------
-- To_String --
---------------
overriding function To_String
(Self : Function_Field;
Format : Formatter'Class;
Long : Boolean) return String
is
pragma Unreferenced (Long);
begin
return Self.Prefix.all
& To_String (Self.To_Field.Get.Element.all, Format, Long => True)
& Self.Suffix.all;
end To_String;
---------------
-- To_String --
---------------
overriding function To_String
(Self : Function2_Field;
Format : Formatter'Class;
Long : Boolean) return String
is
pragma Unreferenced (Long);
begin
return Self.Prefix.all
& To_String (Self.Field1.Get.Element.all, Format, Long => True)
& ", "
& To_String (Self.Field2.Get.Element.all, Format, Long => True)
& Self.Suffix.all;
end To_String;
-----------------
-- Field_Types --
-----------------
package body Field_Types is
type Ada_Type_Access is access Ada_Type;
package Typed_Data_Fields is new Data_Fields (Field);
type Typed_Named_Field_Internal is new Named_Field_Internal with record
Data_Value : Ada_Type_Access;
end record;
overriding procedure Free (Self : in out Typed_Named_Field_Internal);
overriding function To_String
(Self : Typed_Named_Field_Internal;
Format : Formatter'Class;
Long : Boolean) return String;
procedure Unchecked_Free is new Ada.Unchecked_Deallocation
(Ada_Type, Ada_Type_Access);
function Internal_From_Data
(Data : SQL_Field_Internal'Class) return Field'Class;
pragma Inline (Internal_From_Data);
----------
-- Free --
----------
overriding procedure Free (Self : in out Typed_Named_Field_Internal) is
begin
Unchecked_Free (Self.Data_Value);
Free (Named_Field_Internal (Self));
end Free;
---------------
-- To_String --
---------------
overriding function To_String
(Self : Typed_Named_Field_Internal;
Format : Formatter'Class;
Long : Boolean) return String is
begin
if Self.Data_Value /= null then
declare
-- Do not check that Data_Value is valid, it could also
-- be Nan or Inf when using float
pragma Validity_Checks (Off);
begin
return To_SQL (Format, Self.Data_Value.all, Quote => True);
end;
end if;
return To_String (Named_Field_Internal (Self), Format, Long);
end To_String;
----------------
-- From_Table --
----------------
function From_Table
(Self : Field;
Table : SQL_Single_Table'Class) return Field'Class
is
F : Typed_Data_Fields.Field
(Table => null, Instance => Table.Instance,
Instance_Index => Table.Instance_Index, Name => Self.Name);
D : Named_Field_Internal (Typ => Field_Std);
begin
D.Table := (Name => null, Instance => Table.Instance,
Instance_Index => Table.Instance_Index);
D.Str_Value := new String'(Self.Name.all);
F.Data.Set (D);
return Field (F);
end From_Table;
------------------------
-- Internal_From_Data --
------------------------
function Internal_From_Data
(Data : SQL_Field_Internal'Class) return Field'Class
is
F : Field_Pointers.Ref;
begin
F.Set (Data);
return Typed_Data_Fields.Field'
(Table => null, Instance => null, Name => null,
Instance_Index => -1,
Data => F);
end Internal_From_Data;
----------------
-- Expression --
----------------
function Expression (Value : Ada_Type) return Field'Class is
Data : Typed_Named_Field_Internal (Field_Std);
begin
Data.Data_Value := new Ada_Type'(Value);
return Internal_From_Data (Data);
end Expression;
-----------------
-- From_String --
-----------------
function From_String (SQL : String) return Field'Class is
Data : Named_Field_Internal (Field_Std);
begin
Data.Str_Value := new String'(SQL);
return Internal_From_Data (Data);
end From_String;
-----------
-- Param --
-----------
function Param (Index : Positive) return Field'Class is
Data : Named_Field_Internal (Field_Parameter);
P : Param_Type;
begin
Data.Index := Index;
Data.Param_Type.Set (P);
return Internal_From_Data (Data);
end Param;
---------
-- "&" --
---------
function "&"
(Field : SQL_Field'Class; Value : Ada_Type) return SQL_Field_List is
begin
return Field & Expression (Value);
end "&";
function "&"
(Value : Ada_Type; Field : SQL_Field'Class) return SQL_Field_List is
begin
return Expression (Value) & Field;
end "&";
function "&"
(List : SQL_Field_List; Value : Ada_Type) return SQL_Field_List is
begin
return List & Expression (Value);
end "&";
function "&"
(Value : Ada_Type; List : SQL_Field_List) return SQL_Field_List is
begin
return Expression (Value) & List;
end "&";
--------------
-- Operator --
--------------
function Operator
(Field1, Field2 : SQL_Field'Class) return Field'Class
is
F : Typed_Data_Fields.Field
(Table => null, Instance => null,
Instance_Index => -1, Name => null);
D : Named_Field_Internal (Typ => Field_Operator);
begin
D.Op_Value := new String'(Name);
D.List := Field1 & Field2;
F.Data.Set (D);
return F;
end Operator;
---------------------
-- String_Operator --
---------------------
function String_Operator
(Self : SQL_Field'Class; Operand : String) return Field'Class
is
F : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D : Named_Field_Internal (Typ => Field_Operator);
F2 : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D2 : Named_Field_Internal (Typ => Field_Std);
begin
D2.Str_Value := new String'(Prefix & Operand & Suffix);
F2.Data.Set (D2);
D.Op_Value := new String'(Name);
D.List := Self & F2;
F.Data.Set (D);
return F;
end String_Operator;
---------------------
-- Scalar_Operator --
---------------------
function Scalar_Operator
(Self : SQL_Field'Class; Operand : Scalar) return Field'Class
is
function Operator is new String_Operator (Name, Prefix, Suffix);
begin
return Operator (Self, Scalar'Image (Operand));
end Scalar_Operator;
------------------
-- SQL_Function --
------------------
function SQL_Function return Field'Class is
F : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D : Named_Field_Internal (Typ => Field_Std);
begin
D.Str_Value := new String'(Name);
F.Data.Set (D);
return F;
end SQL_Function;
--------------------
-- Apply_Function --
--------------------
function Apply_Function
(Self : Argument_Type'Class) return Field'Class
is
F : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D : Function_Field;
begin
if Suffix /= ")" and then Suffix /= "" then
D.Suffix := new String'(" " & Suffix);
else
D.Suffix := new String'(Suffix);
end if;
D.Prefix := new String'(Name);
D.To_Field := +Self;
F.Data.Set (D);
return F;
end Apply_Function;
-------------------
-- Cast_Implicit --
-------------------
function Cast_Implicit (Self : SQL_Field'Class) return Field'Class is
F : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D : Function_Field;
begin
D.Suffix := new String'("");
D.Prefix := new String'("");
D.To_Field := +Self;
F.Data.Set (D);
return F;
end Cast_Implicit;
---------------------
-- Apply_Function2 --
---------------------
function Apply_Function2
(Arg1 : Argument1_Type'Class;
Arg2 : Argument2_Type'Class) return Field'Class
is
F : Typed_Data_Fields.Field
(Table => null, Instance => null, Name => null,
Instance_Index => -1);
D : Function2_Field;
begin
if Suffix /= ")" and then Suffix /= "" then
D.Suffix := new String'(" " & Suffix);
else
D.Suffix := new String'(Suffix);
end if;
D.Prefix := new String'(Name);
D.Field1 := +Arg1;
D.Field2 := +Arg2;
F.Data.Set (D);
return F;
end Apply_Function2;
------------
-- Nullif --
------------
function Nullif (Left, Right : SQL_Field'Class) return Field'Class is
function Internal is new Apply_Function2
(SQL_Field, SQL_Field, "NULLIF (");
begin
return Internal (Left, Right);
end Nullif;
---------------
-- Operators --
---------------
function "=" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Equal'Access);
end "=";
function "/=" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Different'Access);
end "/=";
function "<" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Less'Access);
end "<";
function "<=" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Less_Equal'Access);
end "<=";
function ">" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Greater'Access);
end ">";
function ">=" (Left : Field; Right : Field'Class) return SQL_Criteria is
begin
return Compare (Left, Right, Comparison_Greater_Equal'Access);
end ">=";
function "=" (Left : Field; Right : Ada_Type) return SQL_Criteria
is
begin
return Compare (Left, Expression (Right), Comparison_Equal'Access);
end "=";
function "/=" (Left : Field; Right : Ada_Type) return SQL_Criteria
is
begin
return Compare
(Left, Expression (Right), Comparison_Different'Access);
end "/=";
function "<" (Left : Field; Right : Ada_Type) return SQL_Criteria is
begin
return Compare (Left, Expression (Right), Comparison_Less'Access);
end "<";
function "<=" (Left : Field; Right : Ada_Type) return SQL_Criteria
is
begin
return Compare
(Left, Expression (Right), Comparison_Less_Equal'Access);
end "<=";
function ">" (Left : Field; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Greater'Access);
end ">";
function ">=" (Left : Field; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Greater_Equal'Access);
end ">=";
function Greater_Than
(Left : SQL_Field'Class; Right : Field) return SQL_Criteria
is
begin
return Compare (Left, Right, Comparison_Greater'Access);
end Greater_Than;
function Greater_Or_Equal
(Left : SQL_Field'Class; Right : Field) return SQL_Criteria
is
begin
return Compare (Left, Right, Comparison_Greater_Equal'Access);
end Greater_Or_Equal;
function Equal
(Left : SQL_Field'Class; Right : Field) return SQL_Criteria
is
begin
return Compare (Left, Right, Comparison_Equal'Access);
end Equal;
function Less_Than
(Left : SQL_Field'Class; Right : Field) return SQL_Criteria
is
begin
return Compare (Left, Right, Comparison_Less'Access);
end Less_Than;
function Less_Or_Equal
(Left : SQL_Field'Class; Right : Field) return SQL_Criteria
is
begin
return Compare (Left, Right, Comparison_Less_Equal'Access);
end Less_Or_Equal;
function Greater_Than
(Left : SQL_Field'Class; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Greater'Access);
end Greater_Than;
function Greater_Or_Equal
(Left : SQL_Field'Class; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Greater_Equal'Access);
end Greater_Or_Equal;
function Equal
(Left : SQL_Field'Class; Right : Ada_Type) return SQL_Criteria is
begin
return Compare (Left, Expression (Right), Comparison_Equal'Access);
end Equal;
function Less_Than
(Left : SQL_Field'Class; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Less'Access);
end Less_Than;
function Less_Or_Equal
(Left : SQL_Field'Class; Right : Ada_Type) return SQL_Criteria is
begin
return Compare
(Left, Expression (Right), Comparison_Less_Equal'Access);
end Less_Or_Equal;
function "=" (Self : Field; Value : Ada_Type) return SQL_Assignment is
-- Do not check that Value is valid. It could also be Nan or Inf
-- when using float
pragma Validity_Checks (Off);
Result : SQL_Assignment;
F : Typed_Named_Field_Internal (Field_Std);
begin
F.Data_Value := new Ada_Type'(Value);
Assign (Result, Self, F);
return Result;
end "=";
---------
-- "=" --
---------
function "=" (Self : Field; To : Field'Class) return SQL_Assignment is
Result : SQL_Assignment;
begin
-- Special case when assigning to one of the Null_Field constants
if To.Table = null
and then To.Instance = null
and then To.Name = Null_String'Access
then
Unassign (Result, Self);
else
Append (Result.List, Assignment_Item'(+Self, +To));
end if;
return Result;
end "=";
end Field_Types;
-------------------
-- Boolean_Image --
-------------------
function Boolean_Image (Self : Formatter; Value : Boolean) return String is
pragma Unreferenced (Self);
begin
return Boolean'Image (Value);
end Boolean_Image;
--------------------
-- Boolean_To_SQL --
--------------------
function Boolean_To_SQL
(Self : Formatter'Class;
Value : Boolean;
Quote : Boolean) return String
is
pragma Unreferenced (Quote);
begin
return Boolean_Image (Self, Value);
end Boolean_To_SQL;
----------------------
-- Any_Float_To_SQL --
----------------------
function Any_Float_To_SQL
(Self : Formatter'Class;
Value : Base_Type;
Quote : Boolean) return String
is
pragma Unreferenced (Self, Quote);
begin
-- Nan ?
if Value /= Value then
return "'Nan'";
-- -Inf ?
elsif Value < Base_Type'First then
return "'-Infinity'";
elsif Value > Base_Type'Last then
return "'Infinity'";
end if;
declare
Img : constant String := Base_Type'Image (Value);
begin
if Img (Img'First) = ' ' then
return Img (Img'First + 1 .. Img'Last);
else
return Img;
end if;
end;
end Any_Float_To_SQL;
--------------------
-- Integer_To_SQL --
--------------------
function Integer_To_SQL
(Self : Formatter'Class;
Value : Integer;
Quote : Boolean) return String
is
pragma Unreferenced (Self, Quote);
Img : constant String := Integer'Image (Value);
begin
if Img (Img'First) = ' ' then
return Img (Img'First + 1 .. Img'Last);
else
return Img;
end if;
end Integer_To_SQL;
-------------------
-- Bigint_To_SQL --
-------------------
function Bigint_To_SQL
(Self : Formatter'Class;
Value : Long_Long_Integer;
Quote : Boolean) return String
is
pragma Unreferenced (Self, Quote);
Img : constant String := Long_Long_Integer'Image (Value);
begin
if Img (Img'First) = ' ' then
return Img (Img'First + 1 .. Img'Last);
else
return Img;
end if;
end Bigint_To_SQL;
-----------------------
-- Supports_Timezone --
-----------------------
function Supports_Timezone (Self : Formatter) return Boolean is
pragma Unreferenced (Self);
begin
return True;
end Supports_Timezone;
-----------------
-- Time_To_SQL --
-----------------
function Time_To_SQL
(Self : Formatter'Class;
Value : Ada.Calendar.Time;
Quote : Boolean) return String
is
begin
-- Value is always rendered as GMT, using Ada.Calendar.Formatting
if Value /= No_Time then
declare
function No_Trailing_Dot (Value : String) return String is
(if Value /= "" and then Value (Value'Last) = '.'
then Value (Value'First .. Value'Last - 1)
else Value);
Value_Str : constant String :=
No_Trailing_Dot
(Trim
(GNAT.Calendar.Time_IO.Image
(Value - UTC_Time_Offset (Value),
"%Y-%m-%d %H:%M:%S.%o"),
Left => Null_Set, Right => To_Set ("0")))
& (if Supports_Timezone (Self) then " +00:00"
else "");
begin
return (if Quote then ''' & Value_Str & ''' else Value_Str);
end;
else
return "NULL";
end if;
end Time_To_SQL;
-----------------
-- Date_To_SQL --
-----------------
function Date_To_SQL
(Self : Formatter'Class;
Value : Ada.Calendar.Time;
Quote : Boolean) return String
is
pragma Unreferenced (Self);
begin
if Value /= No_Time then
declare
Date_Str : constant String :=
Image (Value - UTC_Time_Offset (Value), ISO_Date);
begin
return (if Quote then ''' & Date_Str & ''' else Date_Str);
end;
else
return "NULL";
end if;
end Date_To_SQL;
-------------------
-- Decimal_To_SQL --
-------------------
function Money_To_SQL
(Self : Formatter'Class;
Value : T_Money;
Quote : Boolean) return String
is
pragma Unreferenced (Quote);
begin
return Self.Money_Image (Value);
end Money_To_SQL;
-----------------
-- Money_Image --
-----------------
function Money_Image (Self : Formatter; Value : T_Money) return String is
pragma Unreferenced (Self);
Img : constant String := T_Money'Image (Value);
begin
if Img (Img'First) = ' ' then
return Img (Img'First + 1 .. Img'Last);
else
return Img;
end if;
end Money_Image;
-------------------
-- String_To_SQL --
-------------------
function String_To_SQL
(Self : Formatter'Class; Value : String; Quote : Boolean) return String
is
begin
return String_Image (Self, Value, Quote);
end String_To_SQL;
------------------
-- String_Image --
------------------
function String_Image
(Self : Formatter;
Value : String;
Quote : Boolean) return String
is
-- This function used to quote the backslashes as well. However, this
-- is incorrect, since the SQL backends will already take each
-- character on its own. For instance, to insert a newline with psql
-- we need to
-- SELECT 'a\n' || chr(13) || 'e';
-- This outputs a string with 5 characters.
-- Same with sqlite.
pragma Unreferenced (Self);
Num_Of_Apostrophes : constant Natural :=
Ada.Strings.Fixed.Count (Value, "'");
begin
if not Quote then
return Value;
end if;
if Num_Of_Apostrophes = 0 then
return "'" & Value & "'";
end if;
declare
New_Str : String
(Value'First .. Value'Last + Num_Of_Apostrophes + 2);
Index : Natural := New_Str'First + 1;
begin
New_Str (New_Str'First) := ''';
New_Str (New_Str'Last) := ''';
for I in Value'Range loop
if Value (I) = ''' then
New_Str (Index .. Index + 1) := "''";
Index := Index + 1;
else
New_Str (Index) := Value (I);
end if;
Index := Index + 1;
end loop;
return New_Str;
end;
end String_Image;
------------
-- Create --
------------
function Create (F1, F2 : SQL_Field'Class) return SQL_Assignment is
R : SQL_Assignment;
It : Assignment_Item;
begin
It.Field.Set (F1);
It.To_Field.Set (F2);
R.List.Append (It);
return R;
end Create;
-------------------
-- Free_Dispatch --
-------------------
procedure Free_Dispatch (Self : in out SQL_Parameter_Type'Class) is
begin
Self.Free;
end Free_Dispatch;
----------------------
-- Parameter_String --
----------------------
function Parameter_String
(Self : Formatter;
Index : Positive;
Type_Descr : String) return String
is
pragma Unreferenced (Self, Index, Type_Descr);
begin
return "?";
end Parameter_String;
--------------------
-- Internal_Image --
--------------------
function Internal_Image
(Self : SQL_Parameter_Type;
Format : Formatter'Class) return String
is
pragma Unreferenced (Self, Format);
begin
return "<none>";
end Internal_Image;
--------------------
-- Internal_Image --
--------------------
overriding function Internal_Image
(Self : SQL_Parameter_Text;
Format : Formatter'Class) return String
is
pragma Unreferenced (Format);
begin
return To_String (Self);
end Internal_Image;
--------------------
-- Internal_Image --
--------------------
overriding function Internal_Image
(Self : SQL_Parameter_Character;
Format : Formatter'Class) return String
is
pragma Unreferenced (Format);
begin
return String'(1 .. 1 => Self.Char_Val);
end Internal_Image;
end GNATCOLL.SQL_Impl;
|