summaryrefslogtreecommitdiff
path: root/storage/connect/tabjdbc.cpp
blob: 46fb7695a514e04c335f9af930482893a1645e04 (plain)
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
/************* TabJDBC C++ Program Source Code File (.CPP) *************/
/* PROGRAM NAME: TABJDBC                                               */
/* -------------                                                       */
/*  Version 1.3                                                        */
/*                                                                     */
/* COPYRIGHT:                                                          */
/* ----------                                                          */
/*  (C) Copyright to the author Olivier BERTRAND          2016-2019    */
/*                                                                     */
/* WHAT THIS PROGRAM DOES:                                             */
/* -----------------------                                             */
/*  This program are the TABJDBC class DB execution routines.          */
/*                                                                     */
/* WHAT YOU NEED TO COMPILE THIS PROGRAM:                              */
/* --------------------------------------                              */
/*                                                                     */
/*  REQUIRED FILES:                                                    */
/*  ---------------                                                    */
/*    TABJDBC.CPP    - Source code                                     */
/*    PLGDBSEM.H     - DB application declaration file                 */
/*    TABJDBC.H      - TABJDBC classes declaration file                */
/*    GLOBAL.H       - Global declaration file                         */
/*                                                                     */
/*  REQUIRED LIBRARIES:                                                */
/*  -------------------                                                */
/*    Large model C library                                            */
/*                                                                     */
/*  REQUIRED PROGRAMS:                                                 */
/*  ------------------                                                 */
/*    IBM, Borland, GNU or Microsoft C++ Compiler and Linker           */
/*                                                                     */
/***********************************************************************/

/***********************************************************************/
/*  Include relevant MariaDB header file.                              */
/***********************************************************************/
#define MYSQL_SERVER 1
#include "my_global.h"
#include "sql_class.h"
#include "sql_servers.h"
#if defined(_WIN32)
#include <io.h>
#include <fcntl.h>
#if defined(__BORLANDC__)
#define __MFC_COMPAT__                   // To define min/max as macro
#endif
//#include <windows.h>
#include <sqltypes.h>
#else
#if defined(UNIX)
#include <errno.h>
#define NODW
#include "osutil.h"
#else
#include <io.h>
#endif
#include <fcntl.h>
#endif

/***********************************************************************/
/*  Include application header files:                                  */
/*  global.h    is header containing all global declarations.          */
/*  plgdbsem.h  is header containing the DB application declarations.  */
/*  kindex.h    is kindex header that also includes tabdos.h.          */
/*  tabJDBC.h   is header containing the TABJDBC class declarations.   */
/*  JDBConn.h   is header containing JDBC connection declarations.     */
/***********************************************************************/
#include "global.h"
#include "plgdbsem.h"
#include "mycat.h"
#include "xtable.h"
#include "tabext.h"
#include "tabjdbc.h"
#include "tabmul.h"
#include "tabcol.h"
#include "valblk.h"
#include "ha_connect.h"

#include "sql_string.h"

/***********************************************************************/
/*  DB static variables.                                               */
/***********************************************************************/
//     int num_read, num_there, num_eq[2], num_nf;        // Statistics
extern int num_read, num_there, num_eq[2];                // Statistics

/***********************************************************************/
/*  External function.                                                 */
/***********************************************************************/
bool ExactInfo(void);
#if defined(DEVELOPMENT)
extern char *GetUserVariable(PGLOBAL g, const uchar *varname);
#endif  // DEVELOPMENT

/* -------------------------- Class JDBCDEF -------------------------- */

/***********************************************************************/
/*  Constructor.                                                       */
/***********************************************************************/
JDBCDEF::JDBCDEF(void)
{
	Driver = Url = Wrapname = NULL;
}  // end of JDBCDEF constructor

/***********************************************************************/
/*  Called on table construction.                                      */
/***********************************************************************/
bool JDBCDEF::SetParms(PJPARM sjp)
{
	sjp->Url= Url;
	sjp->User= Username;
	sjp->Pwd= Password;
//sjp->Properties = Prop;
	return true;
}  // end of SetParms

/***********************************************************************/
/* Parse connection string                                             */
/*                                                                     */
/* SYNOPSIS                                                            */
/*   ParseURL()                                                        */
/*   Url                 The connection string to parse                */
/*                                                                     */
/* DESCRIPTION                                                         */
/*   This is used to set the Url in case a wrapper server as been      */
/*   specified. This is rather experimental yet.                       */
/*                                                                     */
/* RETURN VALUE                                                        */
/*   RC_OK       Url was a true URL                                    */
/*   RC_NF       Url was a server name/table                           */
/*   RC_FX       Error                                                 */
/*                                                                     */
/***********************************************************************/
int JDBCDEF::ParseURL(PGLOBAL g, char *url, bool b)
{
	if (strncmp(url, "jdbc:", 5)) {
		PSZ p;

		// No "jdbc:" in connection string. Must be a straight
		// "server" or "server/table"
		// ok, so we do a little parsing, but not completely!
		if ((p = strchr(url, '/'))) {
			// If there is a single '/' in the connection string,
			// this means the user is specifying a table name
			*p++= '\0';

			// there better not be any more '/'s !
			if (strchr(p, '/'))
				return RC_FX;

			Tabname = p;
		} // endif

		if (trace(1))
			htrc("server: %s Tabname: %s", url, Tabname);

		// Now make the required URL
		FOREIGN_SERVER *server, server_buffer;

		// get_server_by_name() clones the server if exists
		if (!(server= get_server_by_name(current_thd->mem_root, url, &server_buffer))) {
			snprintf(g->Message, sizeof(g->Message), "Server %s does not exist!", url);
			return RC_FX;
		} // endif server

#if defined(DEVELOPMENT)
		if (*server->host == '@') {
			Url = GetUserVariable(g, (const uchar*)&server->host[1]);
		} else
#endif // 0
		if (strncmp(server->host, "jdbc:", 5)) {
			// Now make the required URL
			Url = (PSZ)PlugSubAlloc(g, NULL, 0);
			strcat(strcpy(Url, "jdbc:"), server->scheme);
			strcat(strcat(Url, "://"), server->host);

			if (server->port) {
				char buf[16];

				sprintf(buf, "%ld", server->port);
				strcat(strcat(Url, ":"), buf);
			} // endif port

			if (server->db)
				strcat(strcat(Url, "/"), server->db);

			PlugSubAlloc(g, NULL, strlen(Url) + 1);
		} else		 // host is a URL
			Url = PlugDup(g, server->host);

		if (!Tabschema && server->db)
			Tabschema = PlugDup(g, server->db);

		if (!Username && server->username)
			Username = PlugDup(g, server->username);

		if (!Password && server->password)
			Password = PlugDup(g, server->password);

		Driver = PlugDup(g, GetListOption(g, "Driver", server->owner, NULL));
		Wrapname = PlugDup(g, GetListOption(g, "Wrapper", server->owner, NULL));
		Memory = atoi(GetListOption(g, "Memory", server->owner, "0"));
		return RC_NF;
	} // endif

	// Url was a JDBC URL, nothing to do
	return RC_OK;
} // end of ParseURL

/***********************************************************************/
/*  DefineAM: define specific AM block values from JDBC file.          */
/***********************************************************************/
bool JDBCDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
{
	int rc = RC_OK;

	if (EXTDEF::DefineAM(g, am, poff))
		return true;

	Desc = Url = GetStringCatInfo(g, "Connect", NULL);

	if (!Url && !Catfunc) {
		// Look in the option list (deprecated)
		Url = GetStringCatInfo(g, "Url", NULL);

		if (!Url) {
			snprintf(g->Message, sizeof(g->Message), "Missing URL for JDBC table %s", Name);
			return true;
		} // endif Url

	} // endif Connect

	if (Url)
		if ((rc = ParseURL(g, Url)) == RC_FX) {
			snprintf(g->Message, sizeof(g->Message), "Wrong JDBC URL %s", Url);
			return true;
		} // endif rc

	// Default values may have been set in ParseURL
	Memory = GetIntCatInfo("Memory", Memory);
	Driver = GetStringCatInfo(g, "Driver", Driver);
	Wrapname = GetStringCatInfo(g, "Wrapper", Wrapname);
	return false;
} // end of DefineAM

/***********************************************************************/
/*  GetTable: makes a new Table Description Block.                     */
/***********************************************************************/
PTDB JDBCDEF::GetTable(PGLOBAL g, MODE m)
{
	PTDB tdbp = NULL;

	/*********************************************************************/
	/*  Allocate a TDB of the proper type.                               */
	/*  Column blocks will be allocated only when needed.                */
	/*********************************************************************/
	if (Xsrc)
		tdbp = new(g)TDBXJDC(this);
	else switch (Catfunc) {
		case FNC_COL:
			tdbp = new(g)TDBJDBCL(this);
			break;
#if 0
		case FNC_DSN:
			tdbp = new(g)TDBJSRC(this);
			break;
#endif // 0
		case FNC_TABLE:
			tdbp = new(g)TDBJTB(this);
			break;
		case FNC_DRIVER:
			tdbp = new(g)TDBJDRV(this);
			break;
		default:
			tdbp = new(g)TDBJDBC(this);

			if (Multiple == 1)
				tdbp = new(g)TDBMUL(tdbp);
			else if (Multiple == 2)
				strcpy(g->Message, "NO_JDBC_MUL");

		} // endswitch Catfunc

	return tdbp;
} // end of GetTable

/***********************************************************************/
/*  The MySQL and MariaDB JDBC drivers return by default a result set  */
/*  containing the entire result of the executed query. This can be an */
/*  issue for big tables and memory error can occur. An alternative is */
/*  to use streaming (reading one row at a time) but to specify this,  */
/*  a fech size of the integer min value must be send to the driver.   */
/***********************************************************************/
int JDBCPARM::CheckSize(int rows)
{
	if (Url && rows == 1) {
		// Are we connected to a MySQL JDBC connector?
		bool b = (!strncmp(Url, "jdbc:mysql:", 11) ||
			        !strncmp(Url, "jdbc:mariadb:", 13));
		return b ? INT_MIN32 : rows;
	} else
		return rows;

} // end of CheckSize

/* -------------------------- Class TDBJDBC -------------------------- */

/***********************************************************************/
/*  Implementation of the TDBJDBC class.                               */
/***********************************************************************/
TDBJDBC::TDBJDBC(PJDBCDEF tdp) : TDBEXT(tdp)
{
	Jcp = NULL;
	Cnp = NULL;

	if (tdp) {
		Ops.Driver = tdp->Driver;
		Ops.Url = tdp->Url;
		Wrapname = tdp->Wrapname;
		Ops.User = tdp->Username;
		Ops.Pwd = tdp->Password;
		Ops.Scrollable = tdp->Scrollable;
	} else {
		Wrapname = NULL;
		Ops.Driver = NULL;
		Ops.Url = NULL;
		Ops.User = NULL;
		Ops.Pwd = NULL;
		Ops.Scrollable = false;
	} // endif tdp

	Prepared = false;
	Werr = false;
	Rerr = false;
	Ops.Fsize = Ops.CheckSize(Rows);
} // end of TDBJDBC standard constructor

TDBJDBC::TDBJDBC(PTDBJDBC tdbp) : TDBEXT(tdbp)
{
	Jcp = tdbp->Jcp;            // is that right ?
	Cnp = tdbp->Cnp;
	Wrapname = tdbp->Wrapname;
	Ops = tdbp->Ops;
	Prepared = tdbp->Prepared;
	Werr = tdbp->Werr;
	Rerr = tdbp->Rerr;
} // end of TDBJDBC copy constructor

// Method
PTDB TDBJDBC::Clone(PTABS t)
{
	PTDB     tp;
	PJDBCCOL cp1, cp2;
	PGLOBAL  g = t->G;        // Is this really useful ???

	tp = new(g)TDBJDBC(this);

	for (cp1 = (PJDBCCOL)Columns; cp1; cp1 = (PJDBCCOL)cp1->GetNext()) {
		cp2 = new(g)JDBCCOL(cp1, tp);  // Make a copy
		NewPointer(t, cp1, cp2);
	} // endfor cp1

	return tp;
} // end of Clone

/***********************************************************************/
/*  Allocate JDBC column description block.                            */
/***********************************************************************/
PCOL TDBJDBC::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n)
{
	return new(g)JDBCCOL(cdp, this, cprec, n);
} // end of MakeCol

/***********************************************************************/
/*  MakeInsert: make the Insert statement used with JDBC connection.   */
/***********************************************************************/
bool TDBJDBC::MakeInsert(PGLOBAL g)
{
	PCSZ   schmp = NULL;
	char  *catp = NULL, buf[NAM_LEN * 3];
	int    len = 0;
	uint   pos;
	bool   b = false;
	// PTABLE tablep = To_Table;
	PCOL   colp;

	for (colp = Columns; colp; colp = colp->GetNext())
		if (colp->IsSpecial()) {
			strcpy(g->Message, "No JDBC special columns");
			return true;
		} else {
			// Column name can be encoded in UTF-8
			Decode(colp->GetName(), buf, sizeof(buf));
			len += (strlen(buf) + 6);	 // comma + quotes + valist
			((PEXTCOL)colp)->SetRank(++Nparm);
		} // endif colp

	// Below 32 is enough to contain the fixed part of the query
	if (Catalog && *Catalog)
		catp = Catalog;

	if (catp)
		len += strlen(catp) + 1;

	//if (tablep->GetSchema())
	//	schmp = (char*)tablep->GetSchema();
	//else
	if (Schema && *Schema)
		schmp = Schema;

	if (schmp)
		len += strlen(schmp) + 1;

	// Table name can be encoded in UTF-8
	Decode(TableName, buf, sizeof(buf));
	len += (strlen(buf) + 32);
	Query = new(g)STRING(g, len, "INSERT INTO ");

	if (catp) {
		Query->Append(catp);

		if (schmp) {
			Query->Append('.');
			Query->Append(schmp);
		} // endif schmp

		Query->Append('.');
	} else if (schmp) {
		Query->Append(schmp);
		Query->Append('.');
	} // endif schmp

	if (Quote) {
		// Put table name between identifier quotes in case in contains blanks
		Query->Append(Quote);
		Query->Append(buf);
		Query->Append(Quote);
	} else
		Query->Append(buf);

	Query->Append('(');

	for (colp = Columns; colp; colp = colp->GetNext()) {
		if (b)
			Query->Append(", ");
		else
			b = true;

		// Column name can be in UTF-8 encoding
		Decode(colp->GetName(), buf, sizeof(buf));

		if (Quote) {
			// Put column name between identifier quotes in case in contains blanks
			Query->Append(Quote);
			Query->Append(buf);
			Query->Append(Quote);
		} else
			Query->Append(buf);

	} // endfor colp

	if ((Query->Append(") VALUES ("))) {
		strcpy(g->Message, "MakeInsert: Out of memory");
		return true;
	} else // in case prepared statement fails
		pos = Query->GetLength();

	// Make prepared statement
	for (int i = 0; i < Nparm; i++)
		Query->Append("?,");

	if (Query->IsTruncated()) {
		strcpy(g->Message, "MakeInsert: Out of memory");
		return true;
	} else
		Query->RepLast(')');

	// Now see if we can use prepared statement
	if (Jcp->PrepareSQL(Query->GetStr()))
		Query->Truncate(pos);     // Restore query to not prepared
	else
		Prepared = true;

	if (trace(33))
		htrc("Insert=%s\n", Query->GetStr());

	return false;
} // end of MakeInsert

/***********************************************************************/
/*  JDBC Set Parameter function.                                       */
/***********************************************************************/
bool TDBJDBC::SetParameters(PGLOBAL g)
{
	PJDBCCOL colp;

	for (colp = (PJDBCCOL)Columns; colp; colp = (PJDBCCOL)colp->Next)
		if (Jcp->SetParam(colp))
			return true;

	return false;
} // end of SetParameters

/***********************************************************************/
/*  ResetSize: call by TDBMUL when calculating size estimate.          */
/***********************************************************************/
void TDBJDBC::ResetSize(void)
{
	MaxSize = -1;

	if (Jcp && Jcp->IsOpen())
		Jcp->Close();

} // end of ResetSize

/***********************************************************************/
/*  JDBC Cardinality: returns table size in number of rows.            */
/***********************************************************************/
int TDBJDBC::Cardinality(PGLOBAL g)
{
	if (!g)
		return (Mode == MODE_ANY && !Srcdef) ? 1 : 0;

#if 0
	if (Cardinal < 0 && Mode == MODE_ANY && !Srcdef && ExactInfo()) {
		// Info command, we must return the exact table row number
		char     qry[96], tbn[64];
		JDBConn *jcp = new(g)JDBConn(g, this);

		if (jcp->Open(&Ops) == RC_FX)
			return -1;

		// Table name can be encoded in UTF-8
		Decode(TableName, tbn, sizeof(tbn));
		strcpy(qry, "SELECT COUNT(*) FROM ");

		if (Quote)
			strcat(strcat(strcat(qry, Quote), tbn), Quote);
		else
			strcat(qry, tbn);

		// Allocate a Count(*) column (must not use the default constructor)
		Cnp = new(g)JDBCCOL;
		Cnp->InitValue(g);

		if ((Cardinal = jcp->GetResultSize(qry, Cnp)) < 0)
			return -3;

		jcp->Close();
	} else
#endif // 0
		Cardinal = 10;    // To make MariaDB happy

	return Cardinal;
} // end of Cardinality

/***********************************************************************/
/*  JDBC Access Method opening routine.                                */
/*  New method now that this routine is called recursively (last table */
/*  first in reverse order): index blocks are immediately linked to    */
/*  join block of next table if it exists or else are discarted.       */
/***********************************************************************/
bool TDBJDBC::OpenDB(PGLOBAL g)
{
	bool rc = true;

	if (trace(1))
		htrc("JDBC OpenDB: tdbp=%p tdb=R%d use=%d mode=%d\n",
		     this, Tdb_No, Use, Mode);

	if (Use == USE_OPEN) {
		if (Mode == MODE_READ || Mode == MODE_READX) {
			/*****************************************************************/
			/*  Table already open, just replace it at its beginning.        */
			/*****************************************************************/
			if (Memory == 1) {
				if ((Qrp = Jcp->AllocateResult(g, this)))
					Memory = 2;            // Must be filled
				else
					Memory = 0;            // Allocation failed, don't use it

			} else if (Memory == 2)
				Memory = 3;              // Ok to use memory result

			if (Memory < 3) {
				// Method will depend on cursor type
				if ((Rbuf = Query ? Jcp->Rewind(Query->GetStr()) : 0) < 0)
                                {
					if (Mode != MODE_READX) {
						Jcp->Close();
						return true;
					} else
						Rbuf = 0;
                                }

			} else
				Rbuf = Qrp->Nblin;

			CurNum = 0;
			Fpos = 0;
			Curpos = 1;
		} else if (Mode == MODE_UPDATE || Mode == MODE_DELETE) {
			// new update coming from a trigger or procedure
			Query = NULL;
			SetCondFil(NULL);
			Qrystr = To_Def->GetStringCatInfo(g, "Query_String", "?");
		} else {  //if (Mode == MODE_INSERT)
		} // endif Mode

		return false;
	} // endif use

	/*********************************************************************/
	/*  Open an JDBC connection for this table.                          */
	/*  Note: this may not be the proper way to do. Perhaps it is better */
	/*  to test whether a connection is already open for this datasource */
	/*  and if so to allocate just a new result set. But this only for   */
	/*  drivers allowing concurency in getting results ???               */
	/*********************************************************************/
	if (!Jcp)
		Jcp = new(g)JDBConn(g, Wrapname);
	else if (Jcp->IsOpen())
		Jcp->Close();

	if (Jcp->Connect(&Ops))
		return true;
	else if (Quoted)
		Quote = Jcp->GetQuoteChar();

	if (Mode != MODE_READ && Mode != MODE_READX)
		if (Jcp->SetUUID(g, this))
			PushWarning(g, this, 1);

	Use = USE_OPEN;       // Do it now in case we are recursively called

	/*********************************************************************/
	/* Make the command and allocate whatever is used for getting results*/
	/*********************************************************************/
	if (Mode == MODE_READ || Mode == MODE_READX) {
		if (Memory > 1 && !Srcdef) {
			int n;

			if (!MakeSQL(g, true)) {
				// Allocate a Count(*) column
				Cnp = new(g)JDBCCOL;
				Cnp->InitValue(g);

				if ((n = Jcp->GetResultSize(Query->GetStr(), Cnp)) < 0) {
					char* msg = PlugDup(g, g->Message);

					snprintf(g->Message, sizeof(g->Message), "Get result size: %s (rc=%d)", msg, n);
					return true;
				} else if (n) {
					Jcp->m_Rows = n;

					if ((Qrp = Jcp->AllocateResult(g, this)))
						Memory = 2;            // Must be filled
					else {
						strcpy(g->Message, "Result set memory allocation failed");
						return true;
					} // endif n

				} else				 // Void result
					Memory = 0;

				Jcp->m_Rows = 0;
			} else
				return true;

		} // endif Memory

		if (!(rc = MakeSQL(g, false))) {
//		for (PJDBCCOL colp = (PJDBCCOL)Columns; colp; colp = (PJDBCCOL)colp->GetNext())
//			if (!colp->IsSpecial())
//				colp->AllocateBuffers(g, Rows);

			rc = (Mode == MODE_READ)
				? (Jcp->ExecuteQuery(Query->GetStr()) != RC_OK)
				: false;
		} // endif rc

	} else if (Mode == MODE_INSERT) {
#if 0
		if (!(rc = MakeInsert(g))) {
			if (Nparm != Jcp->PrepareSQL(Query->GetStr())) {
				strcpy(g->Message, MSG(PARM_CNT_MISS));
				rc = true;
			} else
				rc = BindParameters(g);

		} // endif rc
#endif // 0
		rc = MakeInsert(g);
	} else if (Mode == MODE_UPDATE || Mode == MODE_DELETE) {
		rc = false;  // wait for CheckCond before calling MakeCommand(g);
	} else
		snprintf(g->Message, sizeof(g->Message), "Invalid mode %d", Mode);

	if (rc) {
		Jcp->Close();
		return true;
	} // endif rc

	/*********************************************************************/
	/*  Reset statistics values.                                         */
	/*********************************************************************/
	num_read = num_there = num_eq[0] = num_eq[1] = 0;
	return false;
} // end of OpenDB

#if 0
/***********************************************************************/
/*  GetRecpos: return the position of last read record.                */
/***********************************************************************/
int TDBJDBC::GetRecpos(void)
{
	return Fpos;
} // end of GetRecpos
#endif // 0

/***********************************************************************/
/*  SetRecpos: set the position of next read record.                   */
/***********************************************************************/
bool TDBJDBC::SetRecpos(PGLOBAL g, int recpos)
{
	if (Jcp->m_Full) {
		Fpos = 0;
		CurNum = 1;
	} else if (Memory == 3) {
		Fpos = 0;
		CurNum = recpos;
	} else if (Ops.Scrollable) {
		// Is new position in the current row set?
		if (recpos > 0 && recpos <= Rbuf) {
		  CurNum = recpos;
			Fpos = recpos;
		} else {
			strcpy(g->Message, "Scrolling out of row set NIY");
			return true;
		} // endif recpos

	} else {
		strcpy(g->Message, "This action requires a scrollable cursor");
		return true;
	} // endif's

	// Indicate the table position was externally set
	Placed = true;
	return false;
} // end of SetRecpos

/***********************************************************************/
/*  Data Base indexed read routine for JDBC access method.             */
/***********************************************************************/
bool TDBJDBC::ReadKey(PGLOBAL g, OPVAL op, const key_range *kr)
{
	char c = Quote ? *Quote : 0;
	int  rc, oldlen = Query->GetLength();
	PHC  hc = To_Def->GetHandler();

	if (!(kr || hc->end_range) || op == OP_NEXT ||
		     Mode == MODE_UPDATE || Mode == MODE_DELETE) {
		if (!kr && Mode == MODE_READX) {
			// This is a false indexed read
			rc = Jcp->ExecuteQuery((char*)Query->GetStr());
			Mode = MODE_READ;
			Rows = 1;												 // ???
			return (rc != RC_OK);
		} // endif key

		return false;
	} else {
		if (hc->MakeKeyWhere(g, Query, op, c, kr))
			return true;

		if (To_CondFil) {
			if (To_CondFil->Idx != hc->active_index) {
				To_CondFil->Idx = hc->active_index;
				To_CondFil->Body= (char*)PlugSubAlloc(g, NULL, 0);
				*To_CondFil->Body= 0;

				if ((To_CondFil = hc->CheckCond(g, To_CondFil, Cond)))
					PlugSubAlloc(g, NULL, strlen(To_CondFil->Body) + 1);

			} // endif active_index

			if (To_CondFil)
				if (Query->Append(" AND ") || Query->Append(To_CondFil->Body)) {
					strcpy(g->Message, "Readkey: Out of memory");
					return true;
				} // endif Append

		} // endif To_Condfil

		Mode = MODE_READ;
	} // endif's op

	if (trace(33))
		htrc("JDBC ReadKey: Query=%s\n", Query->GetStr());

	rc = Jcp->ExecuteQuery((char*)Query->GetStr());
	Query->Truncate(oldlen);
	Rows = 1;                        // ???
	return (rc != RC_OK);
} // end of ReadKey

/***********************************************************************/
/*  Data Base read routine for JDBC access method.                     */
/***********************************************************************/
int TDBJDBC::ReadDB(PGLOBAL g)
{
	int  rc;

	if (trace(2))
		htrc("JDBC ReadDB: R%d Mode=%d\n", GetTdb_No(), Mode);

	if (Mode == MODE_UPDATE || Mode == MODE_DELETE) {
		if (!Query && MakeCommand(g))
			return RC_FX;

		// Send the UPDATE/DELETE command to the remote table
		rc = Jcp->ExecuteUpdate(Query->GetStr());

		if (rc == RC_OK) {
			AftRows = Jcp->m_Aff;
			return RC_EF;               // Nothing else to do
		} else {
			Werr = true;
			return RC_FX;
		} // endif rc

	} // endif Mode

	/*********************************************************************/
	/*  Now start the reading process.                                   */
	/*  Here is the place to fetch the line(s).                          */
	/*********************************************************************/
	if (Placed) {
		if (Fpos && CurNum >= 0)
			Rbuf = Jcp->Fetch((Curpos = Fpos));
		else
			Fpos = CurNum;

		rc = (Rbuf > 0) ? RC_OK : (Rbuf == 0) ? RC_EF : RC_FX;
		Placed = false;
	} else {
		if (Memory != 3) {
			if (++CurNum >= Rbuf) {
				Rbuf = Jcp->Fetch();
				Curpos = Fpos + 1;
				CurNum = 0;
			} // endif CurNum

			rc = (Rbuf > 0) ? RC_OK : (Rbuf == 0) ? RC_EF : RC_FX;
		} else                 // Getting result from memory
			rc = (Fpos < Qrp->Nblin) ? RC_OK : RC_EF;

		if (rc == RC_OK) {
			if (Memory == 2)
				Qrp->Nblin++;

			Fpos++;                // Used for memory and pos
		} // endif rc

	} // endif placed

	if (trace(2))
		htrc(" Read: Rbuf=%d rc=%d\n", Rbuf, rc);

	return rc;
} // end of ReadDB

/***********************************************************************/
/*  Data Base Insert write routine for JDBC access method.             */
/***********************************************************************/
int TDBJDBC::WriteDB(PGLOBAL g)
{
	int  rc;

	if (Prepared) {
		if (SetParameters(g)) {
			Werr = true;
			rc = RC_FX;
		} else if ((rc = Jcp->ExecuteSQL()) == RC_OK)
			AftRows += Jcp->m_Aff;
		else
			Werr = true;

		return rc;
	} // endif  Prepared

	// Statement was not prepared, we must construct and execute
	// an insert query for each line to insert
	uint len = Query->GetLength();
	char buf[64];

	// Make the Insert command value list
	for (PCOL colp = Columns; colp; colp = colp->GetNext()) {
		if (!colp->GetValue()->IsNull()) {
			char *s = colp->GetValue()->GetCharString(buf);

			if (colp->GetResultType() == TYPE_STRING)
				Query->Append_quoted(s);
			else if (colp->GetResultType() == TYPE_DATE) {
				DTVAL *dtv = (DTVAL*)colp->GetValue();

				if (dtv->IsFormatted())
					Query->Append_quoted(s);
				else
					Query->Append(s);

			} else
				Query->Append(s);

		} else
			Query->Append("NULL");

		Query->Append(',');
	} // endfor colp

	if (unlikely(Query->IsTruncated())) {
		strcpy(g->Message, "WriteDB: Out of memory");
		return RC_FX;
	} // endif Query

	Query->RepLast(')');

	if (trace(2))
		htrc("Inserting: %s\n", Query->GetStr());

	rc = Jcp->ExecuteUpdate(Query->GetStr());
	Query->Truncate(len);     // Restore query

	if (rc == RC_OK)
		AftRows += Jcp->m_Aff;
	else
		Werr = true;

	return rc;
} // end of WriteDB

/***********************************************************************/
/*  Data Base delete line routine for JDBC access method.              */
/***********************************************************************/
int TDBJDBC::DeleteDB(PGLOBAL g, int irc)
{
	if (irc == RC_FX) {
		if (!Query && MakeCommand(g))
			return RC_FX;

		// Send the DELETE (all) command to the remote table
		if (Jcp->ExecuteUpdate(Query->GetStr()) == RC_OK) {
			AftRows = Jcp->m_Aff;
			snprintf(g->Message, sizeof(g->Message), "%s: %d affected rows", TableName, AftRows);

			if (trace(1))
				htrc("%s\n", g->Message);

			PushWarning(g, this, 0);    // 0 means a Note
			return RC_OK;               // This is a delete all
		} else
			return RC_FX;               // Error

	} else
		return RC_OK;                 // Ignore

} // end of DeleteDB

/***********************************************************************/
/*  Data Base close routine for JDBC access method.                    */
/***********************************************************************/
void TDBJDBC::CloseDB(PGLOBAL g)
{
	if (Jcp)
		Jcp->Close();

	if (trace(1))
		htrc("JDBC CloseDB: closing %s\n", Name);

	if (!Werr && 
		(Mode == MODE_INSERT || Mode == MODE_UPDATE || Mode == MODE_DELETE)) {
		snprintf(g->Message, sizeof(g->Message), "%s: %d affected rows", TableName, AftRows);

		if (trace(1))
			htrc("%s\n", g->Message);

		PushWarning(g, this, 0);    // 0 means a Note
	}	// endif Mode

	Prepared = false;
} // end of CloseDB

/* --------------------------- JDBCCOL ------------------------------- */

/***********************************************************************/
/*  JDBCCOL public constructor.                                        */
/***********************************************************************/
JDBCCOL::JDBCCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i, PCSZ am)
	     : EXTCOL(cdp, tdbp, cprec, i, am)
{
	uuid = false;
} // end of JDBCCOL constructor

/***********************************************************************/
/*  JDBCCOL private constructor.                                       */
/***********************************************************************/
JDBCCOL::JDBCCOL(void) : EXTCOL()
{
	uuid = false;
} // end of JDBCCOL constructor

/***********************************************************************/
/*  JDBCCOL constructor used for copying columns.                      */
/*  tdbp is the pointer to the new table descriptor.                   */
/***********************************************************************/
JDBCCOL::JDBCCOL(JDBCCOL *col1, PTDB tdbp) : EXTCOL(col1, tdbp)
{
	uuid = col1->uuid;
} // end of JDBCCOL copy constructor

/***********************************************************************/
/*  ReadColumn: retrieve the column value via the JDBC driver.         */
/***********************************************************************/
void JDBCCOL::ReadColumn(PGLOBAL g)
{
	PTDBJDBC tdbp = (PTDBJDBC)To_Tdb;
	int i = tdbp->Fpos - 1;

	if (tdbp->Memory == 3) {
		// Get the value from the stored memory
		if (Crp->Nulls && Crp->Nulls[i] == '*') {
			Value->Reset();
			Value->SetNull(true);
		} else {
			Value->SetValue_pvblk(Crp->Kdata, i);
			Value->SetNull(false);
		} // endif Nulls

		return;
	} // endif Memory

	/*********************************************************************/
	/*  Get the column value.                                            */
	/*********************************************************************/
	tdbp->Jcp->SetColumnValue(Rank, Name, Value);

	if (tdbp->Memory != 2)
		return;

	/*********************************************************************/
	/*  Fill the allocated result structure.                             */
	/*********************************************************************/
	if (Value->IsNull()) {
		if (Crp->Nulls)
			Crp->Nulls[i] = '*';           // Null value

		Crp->Kdata->Reset(i);
	} else
		Crp->Kdata->SetValue(Value, i);

} // end of ReadColumn

/***********************************************************************/
/*  WriteColumn: Convert if necessary.                                 */
/***********************************************************************/
void JDBCCOL::WriteColumn(PGLOBAL g)
{
	/*********************************************************************/
	/*  Do convert the column value if necessary.                        */
	/*********************************************************************/
	if (Value != To_Val)
		Value->SetValue_pval(To_Val, FALSE);   // Convert the inserted value

} // end of WriteColumn

/* -------------------------- Class TDBXJDC -------------------------- */

/***********************************************************************/
/*  Implementation of the TDBXJDC class.                               */
/***********************************************************************/
TDBXJDC::TDBXJDC(PJDBCDEF tdp) : TDBJDBC(tdp)
{
	Cmdlist = NULL;
	Cmdcol = NULL;
	Mxr = tdp->Maxerr;
	Nerr = 0;
} // end of TDBXJDC constructor

/***********************************************************************/
/*  Allocate XSRC column description block.                            */
/***********************************************************************/
PCOL TDBXJDC::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n)
{
	PJSRCCOL colp = new(g)JSRCCOL(cdp, this, cprec, n);

	if (!colp->Flag)
		Cmdcol = colp->GetName();

	return colp;
} // end of MakeCol

/***********************************************************************/
/*  MakeCMD: make the SQL statement to send to JDBC connection.        */
/***********************************************************************/
PCMD TDBXJDC::MakeCMD(PGLOBAL g)
{
	PCMD xcmd = NULL;

	if (To_CondFil) {
		if (Cmdcol) {
			if (!stricmp(Cmdcol, To_CondFil->Body) &&
				(To_CondFil->Op == OP_EQ || To_CondFil->Op == OP_IN)) {
				xcmd = To_CondFil->Cmds;
			} else
				strcpy(g->Message, "Invalid command specification filter");

		} else
			strcpy(g->Message, "No command column in select list");

	} else if (!Srcdef)
		strcpy(g->Message, "No Srcdef default command");
	else
		xcmd = new(g) CMD(g, Srcdef);

	return xcmd;
} // end of MakeCMD

/***********************************************************************/
/*  XDBC GetMaxSize: returns table size (not always one row).          */
/***********************************************************************/
int TDBXJDC::GetMaxSize(PGLOBAL g)
{
	if (MaxSize < 0)
		MaxSize = 2;             // Just a guess

	return MaxSize;
} // end of GetMaxSize

/***********************************************************************/
/*  JDBC Access Method opening routine.                                */
/*  New method now that this routine is called recursively (last table */
/*  first in reverse order): index blocks are immediately linked to    */
/*  join block of next table if it exists or else are discarted.       */
/***********************************************************************/
bool TDBXJDC::OpenDB(PGLOBAL g)
{
	if (trace(1))
		htrc("JDBC OpenDB: tdbp=%p tdb=R%d use=%d mode=%d\n",
		this, Tdb_No, Use, Mode);

	if (Use == USE_OPEN) {
		strcpy(g->Message, "Multiple execution is not allowed");
		return true;
	} // endif use

	/*********************************************************************/
	/*  Open an JDBC connection for this table.                          */
	/*  Note: this may not be the proper way to do. Perhaps it is better */
	/*  to test whether a connection is already open for this datasource */
	/*  and if so to allocate just a new result set. But this only for   */
	/*  drivers allowing concurency in getting results ???               */
	/*********************************************************************/
	if (!Jcp) {
		Jcp = new(g) JDBConn(g, Wrapname);
	} else if (Jcp->IsOpen())
		Jcp->Close();

	if (Jcp->Connect(&Ops))
		return true;

	Use = USE_OPEN;       // Do it now in case we are recursively called

	if (Mode != MODE_READ && Mode != MODE_READX) {
		strcpy(g->Message, "No INSERT/DELETE/UPDATE of XJDBC tables");
		return true;
	} // endif Mode

	/*********************************************************************/
	/*  Get the command to execute.                                      */
	/*********************************************************************/
	if (!(Cmdlist = MakeCMD(g))) {
		// Next lines commented out because of CHECK TABLE
		//Jcp->Close();
		//return true;
	} // endif Query

	Rows = 1;
	return false;
} // end of OpenDB

/***********************************************************************/
/*  ReadDB: Data Base read routine for xdbc access method.             */
/***********************************************************************/
int TDBXJDC::ReadDB(PGLOBAL g)
{
	if (Cmdlist) {
		int rc;

		if (!Query)
			Query = new(g) STRING(g, 0, Cmdlist->Cmd);
		else
			Query->Set(Cmdlist->Cmd);

		if ((rc = Jcp->ExecuteCommand(Query->GetStr())) == RC_FX)
			Nerr++;

		if (rc == RC_NF)
			AftRows = Jcp->m_Aff;
		else if (rc == RC_OK)
			AftRows = Jcp->m_Ncol;

		Fpos++;                // Used for progress info
		Cmdlist = (Nerr > Mxr) ? NULL : Cmdlist->Next;
		return RC_OK;
	} else {
		PushWarning(g, this, 1);
		return RC_EF;
	}	// endif Cmdlist

} // end of ReadDB

/***********************************************************************/
/*  Data Base write line routine for JDBC access method.               */
/***********************************************************************/
int TDBXJDC::WriteDB(PGLOBAL g)
{
	strcpy(g->Message, "Execsrc tables are read only");
	return RC_FX;
} // end of DeleteDB

/***********************************************************************/
/*  Data Base delete line routine for JDBC access method.              */
/***********************************************************************/
int TDBXJDC::DeleteDB(PGLOBAL g, int irc)
{
	strcpy(g->Message, "NO_XJDBC_DELETE");
	return RC_FX;
} // end of DeleteDB

/* --------------------------- JSRCCOL ------------------------------- */

/***********************************************************************/
/*  JSRCCOL public constructor.                                        */
/***********************************************************************/
JSRCCOL::JSRCCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i, PCSZ am)
	     : JDBCCOL(cdp, tdbp, cprec, i, am)
{
	// Set additional JDBC access method information for column.
	Flag = cdp->GetOffset();
} // end of JSRCCOL constructor

/***********************************************************************/
/*  ReadColumn: set column value according to Flag.                    */
/***********************************************************************/
void JSRCCOL::ReadColumn(PGLOBAL g)
{
	PTDBXJDC tdbp = (PTDBXJDC)To_Tdb;

	switch (Flag) {
	case  0: Value->SetValue_psz(tdbp->Query->GetStr()); break;
	case  1: Value->SetValue(tdbp->AftRows);             break;
	case  2: Value->SetValue_psz(g->Message);            break;
	default: Value->SetValue_psz("Invalid Flag");        break;
	} // endswitch Flag

} // end of ReadColumn

/***********************************************************************/
/*  WriteColumn: Should never be called.                               */
/***********************************************************************/
void JSRCCOL::WriteColumn(PGLOBAL g)
{
	// Should never be called
} // end of WriteColumn

/* ---------------------------TDBJDRV class -------------------------- */

/***********************************************************************/
/*  GetResult: Get the list of JDBC drivers.                           */
/***********************************************************************/
PQRYRES TDBJDRV::GetResult(PGLOBAL g)
{
	return JDBCDrivers(g, Maxres, false);
} // end of GetResult

/* ---------------------------TDBJTB class --------------------------- */

/***********************************************************************/
/*  TDBJTB class constructor.                                          */
/***********************************************************************/
TDBJTB::TDBJTB(PJDBCDEF tdp) : TDBJDRV(tdp)
{
	Schema = tdp->Tabschema;
	Tab = tdp->Tabname;
	Tabtype = tdp->Tabtyp;
	Ops.Driver = tdp->Driver;
	Ops.Url = tdp->Url;
	Ops.User = tdp->Username;
	Ops.Pwd = tdp->Password;
	Ops.Fsize = 0;
	Ops.Scrollable = false;
} // end of TDBJTB constructor

/***********************************************************************/
/*  GetResult: Get the list of JDBC tables.                            */
/***********************************************************************/
PQRYRES TDBJTB::GetResult(PGLOBAL g)
{
	return JDBCTables(g, Schema, Tab, Tabtype, Maxres, false, &Ops);
} // end of GetResult

/* --------------------------TDBJDBCL class -------------------------- */

/***********************************************************************/
/*  TDBJDBCL class constructor.                                        */
/***********************************************************************/
TDBJDBCL::TDBJDBCL(PJDBCDEF tdp) : TDBJTB(tdp)
{
	Colpat = tdp->Colpat;
} // end of TDBJDBCL constructor

/***********************************************************************/
/*  GetResult: Get the list of JDBC table columns.                     */
/***********************************************************************/
PQRYRES TDBJDBCL::GetResult(PGLOBAL g)
{
	return JDBCColumns(g, Schema, Tab, Colpat, Maxres, false, &Ops);
} // end of GetResult