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1.1 parser 1: /** @file
2: Parser Oracle driver.
3:
4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
7:
8: 2001.07.30 using Oracle 8.1.6, tested with Oracle 7.x.x
9: */
1.10 ! parser 10: static const char *RCSId="$Id: parser3oracle.C,v 1.9 2001/08/23 12:21:31 parser Exp $";
1.1 parser 11:
12: #include "config_includes.h"
13:
14: #include "pa_sql_driver.h"
15:
16: #include <oci.h>
17:
18: #define MAX_COLS 500
19: #define MAX_IN_LOBS 5
20: #define MAX_LOB_NAME_LENGTH 100
21: #define MAX_OUT_STRING_LENGTH 4000
22:
23: #define EMPTY_CLOB_FUNC_CALL "empty_clob()"
24:
25: #include "ltdl.h"
26:
27: #define MAX_STRING 0x400
28: #define MAX_NUMBER 20
29:
30: #if _MSC_VER
31: # define snprintf _snprintf
32: # define strcasecmp _stricmp
33: # define strncasecmp _strnicmp
34: #endif
35:
36: #ifndef max
37: inline int max(int a, int b) { return a>b?a:b; }
38: inline int min(int a, int b){ return a<b?a:b; }
39: #endif
40:
41: static char *lsplit(char *string, char delim) {
42: if(string) {
43: char *v=strchr(string, delim);
44: if(v) {
45: *v=0;
46: return v+1;
47: }
48: }
49: return 0;
50: }
51:
52: struct OracleSQL_connection_struct {
53: jmp_buf mark; char error[MAX_STRING];
54: OCIEnv *envhp;
55: OCIServer *srvhp;
56: OCIError *errhp;
57: OCISvcCtx *svchp;
58: OCISession *usrhp;
59: };
60:
61: struct OracleSQL_query_lobs {
62: struct return_rows {
63: struct return_row {
64: OCILobLocator *locator; ub4 len;
65: int ind;
66: ub2 rcode;
67: } *row;
68: int count;
69: };
70: struct cbf_context_struct {
71: SQL_Driver_services *services;
72: OracleSQL_connection_struct *cs;
73: return_rows *rows;
74: };
75: struct Item {
76: const char *name_ptr; size_t name_size;
77: char *data_ptr; size_t data_size;
78: OCILobLocator *locator;
79: OCIBind *bind;
80: return_rows rows;
81: } items[MAX_IN_LOBS];
82: int count;
83: };
84:
85:
86: // forwards
87: void check(
88: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
89: const char *step, sword status);
90: static sb4 cbf_no_data(
91: dvoid *ctxp,
92: OCIBind *bindp,
93: ub4 iter, ub4 index,
94: dvoid **bufpp,
95: ub4 *alenpp,
96: ub1 *piecep,
97: dvoid **indpp);
98: static sb4 cbf_get_data(dvoid *ctxp,
99: OCIBind *bindp,
100: ub4 iter, ub4 index,
101: dvoid **bufpp,
102: ub4 **alenp,
103: ub1 *piecep,
104: dvoid **indpp,
105: ub2 **rcodepp);
1.3 parser 106: void tolower(char *out, const char *in, size_t size);
1.1 parser 107:
108: /**
109: OracleSQL server driver
110: */
111: class OracleSQL_Driver : public SQL_Driver {
112: public:
113:
114: OracleSQL_Driver() : SQL_Driver() {
115: }
116:
117: /// get api version
118: int api_version() { return SQL_DRIVER_API_VERSION; }
119: /// initialize driver by loading sql dynamic link library
120: const char *initialize(const char *dlopen_file_spec) {
1.6 parser 121: const char *error=dlopen_file_spec?
1.1 parser 122: dlink(dlopen_file_spec):"client library column is empty";
1.6 parser 123: if(!error) {
1.4 parser 124: OCIInitialize((ub4)OCI_THREADED, (dvoid *)0,
1.5 parser 125: (dvoid * (*)(void *, unsigned int))0,
126: (dvoid * (*)(void*, void*, unsigned int))0,
127: (void (*)(void*, void*))0 );
1.6 parser 128: }
1.1 parser 129:
1.6 parser 130: return error;
1.1 parser 131: }
132:
133: /** connect
134: @param used_only_in_connect_url
1.2 parser 135: format: @b user:pass@service
1.1 parser 136: */
137: void connect(
138: char *used_only_in_connect_url,
139: SQL_Driver_services& services,
140: void **connection ///< output: OracleSQL_connection_struct *
141: ) {
142: char *user=used_only_in_connect_url;
143: char *service=lsplit(user, '@');
144: char *pwd=lsplit(user, ':');
145:
146: OracleSQL_connection_struct &cs=
147: *(OracleSQL_connection_struct *)services.calloc(sizeof(OracleSQL_connection_struct));
148:
1.2 parser 149: if(!(user && pwd && service))
1.3 parser 150: services._throw("mailformed connect part, must be 'user:pass@service'");
1.2 parser 151:
1.1 parser 152: if(setjmp(cs.mark))
153: services._throw(cs.error);
154:
1.3 parser 155: // Allocate and initialize OCIError handle, attempt #1
156: /*
157: grabbed from sample
158: /server.804/a58234/oci_func.htm#446192
159: but doc
160: /server.804/a58234/oci_func.htm#446100
161: doesnt have this param listed as allowed
162: 8.1.6 client library barks as OCI_INVALID_HANDLE
163: and debugging revealed that OCI_HTYPE_ENV param value is invalid
164: later in doc
165: /server.804/a58234/oci_func.htm#446192
166: on OCIEnvInit thay say
167: "No changes are done to an already initialized handle"
168: think, this is some sort of backward compatibility wonder.
169: leaving as it is, and without check()
170: */
1.10 ! parser 171: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
1.3 parser 172: // Initialize an environment handle, attempt #2
1.4 parser 173: check(services, cs, "EnvInit", OCIEnvInit(
1.3 parser 174: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
175: // Allocate and initialize OCIError handle
1.4 parser 176: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
1.3 parser 177: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
178: // Allocate and initialize OCIServer handle
1.4 parser 179: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.3 parser 180: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
181: // Attach to a 'service'; initialize server context handle
1.4 parser 182: check(services, cs, "ServerAttach", OCIServerAttach(
1.10 ! parser 183: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
1.3 parser 184: // Allocate and initialize OCISvcCtx handle
1.4 parser 185: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
1.3 parser 186: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
187: // set attribute server context in the service context
1.4 parser 188: check(services, cs, "AttrSet server-service", OCIAttrSet(
1.3 parser 189: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
1.5 parser 190: (dvoid *)cs.srvhp, (ub4)0,
1.3 parser 191: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
192: // allocate a user context handle
1.4 parser 193: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.3 parser 194: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
195: // set 'user' name
1.4 parser 196: check(services, cs, "AttrSet user-session", OCIAttrSet(
1.2 parser 197: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 198: (dvoid *)user, (ub4)strlen(user),
1.3 parser 199: OCI_ATTR_USERNAME, cs.errhp));
200: // set 'pwd' password
1.4 parser 201: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
1.2 parser 202: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 203: (dvoid *)pwd, (ub4)strlen(pwd),
1.2 parser 204: OCI_ATTR_PASSWORD, cs.errhp));
1.3 parser 205: // Authenticate a user
1.4 parser 206: check(services, cs, "SessionBegin", OCISessionBegin(
1.3 parser 207: cs.svchp, cs.errhp, cs.usrhp,
1.1 parser 208: OCI_CRED_RDBMS, OCI_DEFAULT));
1.3 parser 209: // remember connection in session
1.4 parser 210: check(services, cs, "AttrSet service-session", OCIAttrSet(
1.2 parser 211: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
1.1 parser 212: (dvoid *)cs.usrhp, (ub4)0,
1.2 parser 213: OCI_ATTR_SESSION, cs.errhp));
1.1 parser 214:
1.3 parser 215: // return created connection
1.1 parser 216: *(OracleSQL_connection_struct **)connection=&cs;
217: }
218: void disconnect(SQL_Driver_services& services, void *connection) {
219: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.4 parser 220: if(setjmp(cs.mark))
221: services._throw(cs.error);
1.1 parser 222:
1.3 parser 223: // Terminate a user session
1.4 parser 224: check(services, cs, "SessionEnd", OCISessionEnd(
1.3 parser 225: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT));
226: // Detach from a server; uninitialize server context handle
1.4 parser 227: check(services, cs, "ServerDetach", OCIServerDetach(
1.3 parser 228: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT));
229: // Free a previously allocated handle
1.4 parser 230: check(services, cs, "HandleFree srvhp", OCIHandleFree(
1.3 parser 231: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER));
1.4 parser 232: check(services, cs, "HandleFree svchp", OCIHandleFree(
1.3 parser 233: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX));
1.4 parser 234: check(services, cs, "HandleFree errhp", OCIHandleFree(
1.3 parser 235: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR)); cs.errhp=0;
1.4 parser 236: check(services, cs, "HandleFree envhp", OCIHandleFree(
1.3 parser 237: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV));
1.1 parser 238: }
239: void commit(SQL_Driver_services& services, void *connection) {
240: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.4 parser 241: if(setjmp(cs.mark))
242: services._throw(cs.error);
1.1 parser 243:
244: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
245: }
246: void rollback(SQL_Driver_services& services, void *connection) {
247: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.4 parser 248: if(setjmp(cs.mark))
249: services._throw(cs.error);
1.1 parser 250:
251: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
252: }
253:
254: bool ping(SQL_Driver_services&, void *connection) {
1.4 parser 255: // maybe OCIServerVersion?
256: return true;
1.1 parser 257: }
258:
259: unsigned int quote(
260: SQL_Driver_services&, void *,
261: char *to, const char *from, unsigned int length) {
262: /*
263: it's already UNTAINT_TIMES_BIGGER
264: */
265: unsigned int result=length;
266: while(length--) {
267: switch(*from) {
268: case '\'': // "'" -> "''"
269: *to++='\'';
270: break;
271: case '\\': // "\" -> "\\"
272: *to++='\'';
273: break;
274: }
275: *to++=*from++;
276: }
277: return result;
278: }
279: void query(
280: SQL_Driver_services& services, void *connection,
281: const char *astatement, unsigned long offset, unsigned long limit,
282: SQL_Driver_query_event_handlers& handlers) {
1.10 ! parser 283:
1.1 parser 284: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
285: OracleSQL_query_lobs lobs={{0}, 0};
286: OCIStmt *stmthp=0;
287:
288: bool failed=false;
289: if(setjmp(cs.mark)) {
290: failed=true;
291: goto cleanup;
1.7 parser 292: } else {
1.1 parser 293: const char *statement=preprocess_statement(services, cs,
294: astatement, lobs);
295:
1.4 parser 296: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
1.3 parser 297: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.1 parser 298: check(services, cs, "syntax",
299: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
1.10 ! parser 300: (ub4)strlen((char *)statement),
1.3 parser 301: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
1.1 parser 302: {
303: for(int i=0; i<lobs.count; i++) {
304: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
1.3 parser 305: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
1.1 parser 306:
307: check(services, cs, "bind output", OCIBindByPos(stmthp,
308: &lobs.items[i].bind, cs.errhp,
1.5 parser 309: (ub4)1+i,
1.1 parser 310: (dvoid *)&lobs.items[i].locator,
1.5 parser 311: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
312: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
1.1 parser 313:
314: lobs.items[i].rows.count=0;
315: OracleSQL_query_lobs::cbf_context_struct cbf_context={
316: &services, &cs, &lobs.items[i].rows};
317: check(services, cs, "bind dynamic", OCIBindDynamic(
318: lobs.items[i].bind, cs.errhp,
319: (dvoid *) &cbf_context, cbf_no_data,
320: (dvoid *) &cbf_context, cbf_get_data));
321: }
322: }
323:
324: execute_prepared(services, cs,
325: statement, stmthp, lobs,
326: offset, limit, handlers);
327: }
328: cleanup: // no check call after this point!
329: {
330: for(int i=0; i<lobs.count; i++) {
331: /* free var locator */
1.10 ! parser 332: if(OCILobLocator *locator=lobs.items[i].locator)
! 333: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
1.1 parser 334:
1.10 ! parser 335: /* free rows descriptors */
! 336: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
! 337: for(int r=0; r<rows.count; r++)
! 338: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
1.1 parser 339: }
340: }
341: if(stmthp)
1.10 ! parser 342: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
1.1 parser 343:
344: if(failed)
345: services._throw(cs.error);
346: }
347:
348: private: // private funcs
349:
350: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
351: const char *astatement, OracleSQL_query_lobs &lobs) {
352: size_t statement_size=strlen(astatement);
353:
354: char *result=(char *)services.malloc(statement_size
355: +MAX_STRING // in case of short 'strings'
356: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
357: +1);
358: const char *o=astatement;
359:
360: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
361: char *n=result;
362: while(*o) {
363: if(
364: o[0]=='/' &&
365: o[1]=='*' &&
366: o[2]=='*') { // name start
367: o+=3;
368: const char *name_begin=o;
369: while(*o)
370: if(
371: o[0]=='*' &&
372: o[1]=='*' &&
373: o[2]=='/' &&
374: o[3]=='\'') { // name end
375: const char *name_end=o;
376: o+=4;
377: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
378: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
379: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
380:
381: const char *start=o;
382: bool escaped=false;
383: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
384: escaped=*o=='\\' || (o[0]=='\'' && o[1]=='\'');
385: if(escaped) {
386: // write pending, skip "\" or "'"
387: if(size_t size=o-start) {
388: memcpy(item.data_ptr+item.data_size, start, size);
389: item.data_size+=size;
390: }
391: start=++o;
392: } else
393: o++;
394: }
395: if(size_t size=o-start) {
396: memcpy(item.data_ptr+item.data_size, start, size);
397: item.data_size+=size;
398: }
399: if(*o)
400: o++; // skip "'"
401:
402: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
403: break;
404: } else
405: o++; // /**skip**/'xxx'
406: } else
407: *n++=*o++;
408: }
409: *n=0;
410:
411: if(lobs.count) {
412: int i;
413: n+=sprintf(n, " returning ");
414: for(i=0; i<lobs.count; i++) {
415: if(i)
416: *n++=',';
1.9 parser 417: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
1.1 parser 418: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
419: n+=lobs.items[i].name_size;*/
420: }
421: n+=sprintf(n, " into ");
422: for(i=0; i<lobs.count; i++) {
423: if(i)
424: *n++='x';
1.9 parser 425: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
1.1 parser 426: /**n++=':';
427: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
428: n+=lobs.items[i].name_size;*/
429: }
430: }
431:
432: return result;
433: }
434:
435: void execute_prepared(
436: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
437: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
438: unsigned long offset, unsigned long limit,
439: SQL_Driver_query_event_handlers& handlers) {
440:
441: ub2 stmt_type=-1; // UNKNOWN // OCI_STMT_SELECT;//
442: /*
443: //gpfs on sun. paf 000818
444: //Zanyway, this is needed before.
445: check(services, cs, "get stmt type", OCIAttrGet(
446: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
1.5 parser 447: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
1.1 parser 448: */
449: if(strncasecmp(statement, "select", 6)==0)
450: stmt_type=OCI_STMT_SELECT;
1.3 parser 451: else if(strncasecmp(statement, "insert", 6)==0)
1.1 parser 452: stmt_type=OCI_STMT_INSERT;
1.3 parser 453: else if(strncasecmp(statement, "update", 6)==0)
1.1 parser 454: stmt_type=OCI_STMT_UPDATE;
455:
1.6 parser 456: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
1.10 ! parser 457: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
! 458: (OCISnapshot *)NULL,
! 459: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
1.1 parser 460:
1.3 parser 461: if(status!=OCI_NO_DATA)
1.1 parser 462: check(services, cs, "execute", status);
463:
464: {
465: for(int i=0; i<lobs.count; i++)
466: if(ub4 bytes_to_write=lobs.items[i].data_size) {
467: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
468: for(int r=0; r<rows->count; r++) {
469: OCILobLocator *locator=rows->row[r].locator;
470: check(services, cs, "lobwrite", OCILobWrite (
471: cs.svchp, cs.errhp,
472: locator, &bytes_to_write, 1,
1.10 ! parser 473: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
1.5 parser 474: (dvoid *)0, 0, (ub2)0,
1.1 parser 475: (ub1) SQLCS_IMPLICIT));
476: }
477: }
478: }
479:
480: switch(stmt_type) {
481: case OCI_STMT_SELECT:
482: fetch_table(services, cs,
1.3 parser 483: stmthp, offset, limit,
1.1 parser 484: handlers);
485: break;
1.7 parser 486: default:
487: /*
1.1 parser 488: case OCI_STMT_INSERT:
489: case OCI_STMT_UPDATE:
1.7 parser 490: */
1.1 parser 491: break;
492: }
493: }
494:
495: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
1.3 parser 496: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
1.1 parser 497: SQL_Driver_query_event_handlers& handlers) {
1.7 parser 498:
1.1 parser 499: OCIParam *mypard;
500: ub2 dtype;
501: text *col_name;
502:
503: struct {
504: ub2 type;
505: char *str;
506: OCILobLocator *var;
507: OCIDefine *def;
508: sb2 indicator;
1.4 parser 509: } cols[MAX_COLS]={0};
510: int column_count=0;
1.1 parser 511:
1.4 parser 512: bool failed=false;
513: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
514: if(setjmp(cs.mark)) {
515: failed=true;
516: goto cleanup;
1.7 parser 517: } else {
1.4 parser 518: // idea of preincrementing is that at error time all handles would free up
1.5 parser 519: while(++column_count<=MAX_COLS) {
1.4 parser 520: /* get next descriptor, if there is one */
521: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
522: (ub4) column_count)!=OCI_SUCCESS)
523: break;
524:
525: /* Retrieve the data type attribute */
526: check(services, cs, "get type", OCIAttrGet(
527: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
1.5 parser 528: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
1.4 parser 529: (OCIError *)cs.errhp));
530:
531: /* Retrieve the column name attribute */
532: ub4 col_name_len;
533: check(services, cs, "get name", OCIAttrGet(
534: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
535: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
536: (OCIError *)cs.errhp));
537:
1.1 parser 538: {
1.4 parser 539: size_t size=(size_t)col_name_len;
540: char *ptr=(char *)services.malloc(size);
541: tolower(ptr, (char *)col_name, size);
542: handlers.add_column(ptr, size);
543: }
544:
545: ub2 coerce_type=dtype;
546: sb4 size=0;
547: void *ptr;
548:
549: switch(dtype) {
550: case SQLT_CLOB:
551: {
552: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
553: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
554: (ub4)OCI_DTYPE_LOB,
1.5 parser 555: 0, (dvoid **)0));
1.4 parser 556:
557: size=0;
558: break;
559: }
560: default:
561: coerce_type=SQLT_STR;
562: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
563: size=MAX_OUT_STRING_LENGTH;
1.1 parser 564: break;
565: }
1.4 parser 566:
567: cols[column_count-1].type=coerce_type;
568:
569: check(services, cs, "DefineByPos", OCIDefineByPos(
570: stmthp, &cols[column_count-1].def, cs.errhp,
571: column_count, (ub1 *) ptr, size,
572: coerce_type, (dvoid *) &cols[column_count-1].indicator,
1.5 parser 573: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
1.1 parser 574: }
1.4 parser 575:
576: handlers.before_rows();
577:
1.5 parser 578: for(unsigned long row=0; !limit||row<limit+offset; row++) {
579: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
1.4 parser 580: (ub4)OCI_DEFAULT);
581: if(status!=OCI_SUCCESS) {
582: if(status!=OCI_NO_DATA)
583: check(services, cs, "fetch", status);
584: break;
585: }
586: if(row>=offset) {
587: handlers.add_row();
588: for(int i=0; i<column_count; i++) {
589: size_t size;
590: void *ptr;
591: if(cols[i].indicator) { // NULL?
592: size=0;
593: ptr=0;
1.6 parser 594: } else // not NULL
1.4 parser 595: switch(cols[i].type) {
596: case SQLT_CLOB:
597: {
598: ub4 amtp=4096000000UL;
599: ub4 offset=1;
600: ub4 loblen=0;
601: OCILobLocator *var=(OCILobLocator *)cols[i].var;
602: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
603: if(loblen) {
604: size=(size_t)loblen;
605: ptr=services.malloc(size);
606: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
607: var, &amtp, offset, (dvoid *) ptr,
608: loblen, (dvoid *)0,
609: 0,
1.5 parser 610: (ub2)0, (ub1) SQLCS_IMPLICIT));
1.4 parser 611: }
612: break;
613: }
614: default:
1.6 parser 615: if(const char *str=cols[i].str) {
616: size=strlen(str);
617: ptr=services.malloc(size);
618: memcpy(ptr, str, size);
619: } else {
620: size=0;
621: ptr=0;
622: }
1.4 parser 623: break;
1.1 parser 624: }
1.4 parser 625: handlers.add_row_cell(ptr, size);
1.1 parser 626: }
627: }
628: }
629: }
630:
1.4 parser 631: cleanup: // no check call after this point!
1.3 parser 632: for(int i=0; i<column_count; i++) {
1.1 parser 633: switch(cols[i].type) {
634: case SQLT_CLOB:
635: /* free var locator */
1.4 parser 636: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
1.1 parser 637: break;
638: default:
639: break;
640: }
641: }
1.4 parser 642:
643: if(failed) // need rethrow?
1.5 parser 644: longjmp(saved_mark, 1);
1.1 parser 645: }
646:
647: private: // conn client library funcs
1.6 parser 648:
649: friend void check(
650: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
651: const char *step, sword status);
652: friend sb4 cbf_get_data(dvoid *ctxp,
653: OCIBind *bindp,
654: ub4 iter, ub4 index,
655: dvoid **bufpp,
656: ub4 **alenp,
657: ub1 *piecep,
658: dvoid **indpp,
659: ub2 **rcodepp);
660:
661:
662: #define OCI_DECL(name, params) \
663: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
664:
665: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
666: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
667: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
668: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
669:
670: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
671: size_t xtramem_sz, dvoid **usrmempp));
672:
673: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
674: dvoid *attributep, ub4 *sizep, ub4 attrtype,
675: OCIError *errhp));
676:
677: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
678: ub4 size, ub4 attrtype, OCIError *errhp));
679:
680: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
681: ub4 position, dvoid *valuep, sb4 value_sz,
682: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
683: ub4 maxarr_len, ub4 *curelep, ub4 mode));
684:
685: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
686: OCICallbackInBind icbfp, dvoid *octxp,
687: OCICallbackOutBind ocbfp));
688:
689: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
690: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
691: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
692:
693: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
694: CONST ub4 type, CONST size_t xtramem_sz,
695: dvoid **usrmempp));
696:
697: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
698:
699:
700: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
701: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
702:
703: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
704: CONST size_t xtramem_sz, dvoid **usrmempp));
1.1 parser 705:
1.6 parser 706: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
707:
708: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
709: OCILobLocator *locp,
710: ub4 *lenp));
711:
712: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
713: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
714: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
715: CONST dvoid *bufp,
716: ub4 len,
717: ub1 piece),
718: ub2 csid, ub1 csfrm));
719:
720: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
721: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
722: ub1 piece, dvoid *ctxp,
723: sb4 (*cbfp)(dvoid *ctxp,
724: dvoid *bufp,
725: ub4 *len,
726: ub1 *piece),
727: ub2 csid, ub1 csfrm));
728:
729: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
730: dvoid **parmdpp, ub4 pos));
731:
732: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
733: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
734:
735: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
736:
737: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
738: ub4 credt, ub4 mode));
739:
740: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
741: ub4 mode));
742:
743: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
744: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
745: OCISnapshot *snap_out, ub4 mode));
746:
747: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
748: ub2 orientation, ub4 mode));
749:
750: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
751: ub4 stmt_len, ub4 language, ub4 mode));
752:
753: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
754:
755: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
1.1 parser 756:
757: private: // conn client library funcs linking
758:
759: const char *dlink(const char *dlopen_file_spec) {
760: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
761: if(!handle)
762: return "can not open the dynamic link module";
763:
764: #define DSLINK(name, action) \
765: name=(t_##name)lt_dlsym(handle, #name); \
766: if(!name) \
767: action;
768:
1.6 parser 769: #define OLINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
1.1 parser 770:
1.6 parser 771: OLINK(Initialize);
772: OLINK(EnvInit);
773: OLINK(AttrGet); OLINK(AttrSet);
774: OLINK(BindByPos); OLINK(BindDynamic);
775: OLINK(DefineByPos);
776: OLINK(DescriptorAlloc); OLINK(DescriptorFree);
777: OLINK(ErrorGet);
778: OLINK(HandleAlloc); OLINK(HandleFree);
779: OLINK(LobGetLength);
780: OLINK(LobRead); OLINK(LobWrite);
781: OLINK(ParamGet);
782: OLINK(ServerAttach); OLINK(ServerDetach);
783: OLINK(SessionBegin); OLINK(SessionEnd);
784: OLINK(StmtExecute); OLINK(StmtFetch); OLINK(StmtPrepare);
785: OLINK(TransCommit); OLINK(TransRollback);
1.1 parser 786:
787: return 0;
788: }
789:
1.6 parser 790: } *OracleSQL_driver;
1.1 parser 791:
792: void check(
793: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
794: const char *step, sword status) {
795:
1.4 parser 796: const char *msg;
1.2 parser 797: char reason[MAX_STRING/2];
1.1 parser 798:
799: switch (status) {
800: case OCI_SUCCESS:
1.4 parser 801: return; // hurrah
1.1 parser 802: case OCI_ERROR:
803: {
1.4 parser 804: sb4 errcode;
1.10 ! parser 805: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
! 806: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
1.4 parser 807: msg=reason;
808: else
809: msg="[can not get error description]";
1.8 parser 810: break;
1.1 parser 811: }
812: case OCI_SUCCESS_WITH_INFO:
1.4 parser 813: msg="SUCCESS_WITH_INFO"; break;
1.1 parser 814: case OCI_NEED_DATA:
1.4 parser 815: msg="NEED_DATA"; break;
1.1 parser 816: case OCI_NO_DATA:
1.4 parser 817: msg="NODATA"; break;
1.1 parser 818: case OCI_INVALID_HANDLE:
1.4 parser 819: msg="INVALID_HANDLE"; break;
1.1 parser 820: case OCI_STILL_EXECUTING:
1.4 parser 821: msg="STILL_EXECUTE"; break;
1.1 parser 822: case OCI_CONTINUE:
1.4 parser 823: msg="CONTINUE"; break;
824: default:
825: msg="unknown"; break;
1.2 parser 826: }
1.1 parser 827:
1.3 parser 828: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
829: msg, step, (int)status);
1.1 parser 830: longjmp(cs.mark, 1);
831: }
832:
833:
834: /* ----------------------------------------------------------------- */
835: /* Intbind callback that does not do any data input. */
836: /* ----------------------------------------------------------------- */
837: static sb4 cbf_no_data(
838: dvoid *ctxp,
839: OCIBind *bindp,
840: ub4 iter, ub4 index,
841: dvoid **bufpp,
842: ub4 *alenpp,
843: ub1 *piecep,
844: dvoid **indpp) {
1.5 parser 845: *bufpp=(dvoid *)0;
1.2 parser 846: *alenpp=0;
847: static sb2 null_ind=-1;
848: *indpp=(dvoid *) &null_ind;
849: *piecep=OCI_ONE_PIECE;
1.1 parser 850:
851: return OCI_CONTINUE;
852: }
853:
854: /* ----------------------------------------------------------------- */
855: /* Outbind callback for returning data. */
856: /* ----------------------------------------------------------------- */
857: static sb4 cbf_get_data(dvoid *ctxp,
858: OCIBind *bindp,
859: ub4 iter, ub4 index,
860: dvoid **bufpp,
861: ub4 **alenp,
862: ub1 *piecep,
863: dvoid **indpp,
864: ub2 **rcodepp) {
865: OracleSQL_query_lobs::cbf_context_struct &context=
866: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
867:
1.3 parser 868: if(index==0) {
1.6 parser 869: static ub4 rows;
870: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
871: OracleSQL_driver->OCIAttrGet(
872: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
873: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1.2 parser 874: context.rows->count=(ub2)rows;
875: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1.1 parser 876: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
877: }
878:
879: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
880:
1.6 parser 881: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 882: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1.3 parser 883: (ub4)OCI_DTYPE_LOB,
1.5 parser 884: 0, (dvoid **)0));
1.1 parser 885:
1.2 parser 886: *bufpp=var.locator;
887: *alenp=&var.len;
888: *indpp=(dvoid *) &var.ind;
889: *piecep=OCI_ONE_PIECE;
890: *rcodepp=&var.rcode;
1.1 parser 891:
892: return OCI_CONTINUE;
893: }
894:
1.3 parser 895: void tolower(char *out, const char *in, size_t size) {
896: while(size--)
897: *out++=tolower(*in++);
898: }
1.1 parser 899:
900: extern "C" SQL_Driver *create() {
1.10 ! parser 901: //_asm int 3;
1.6 parser 902: return OracleSQL_driver=new OracleSQL_Driver();
1.1 parser 903: }