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1.1 parser 1: /** @file
2: Parser Oracle driver.
3:
1.19 paf 4: Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.1 parser 5:
1.19 paf 6: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 parser 7:
8: 2001.07.30 using Oracle 8.1.6 [@test tested with Oracle 7.x.x]
9: */
1.25 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.24 2002/12/09 07:56:27 paf 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:
1.5 paf 41: /// @test setenv version memory. maybe key/value needs ::malloc?
1.10 paf 42: static int pa_setenv(const char *name, const char *value, bool do_append) {
43: const char *prev_value=0;
44: if(do_append)
45: prev_value=getenv(name);
1.4 paf 46: #ifdef HAVE_PUTENV
47: // MEM_LEAK_HERE. refer to EOF man putenv
1.10 paf 48: char *buf=(char *)::malloc(strlen(name)
49: +1
50: +(prev_value?strlen(prev_value):0)
51: +strlen(value)
52: +1);
1.4 paf 53: strcpy(buf, name);
54: strcat(buf, "=");
1.10 paf 55: if(prev_value)
56: strcat(buf, prev_value);
1.4 paf 57: strcat(buf, value);
1.5 paf 58: /*
59: if(FILE *f=fopen("f", "at")) {
60: fprintf(f, "****************************%s\n", buf);
61: // for (char **env = environ; env != NULL && *env != NULL; env++)
62: // fputs(*env, f);
63:
64: fclose(f);
65: }
66: */
1.4 paf 67: return putenv(buf);
68: #else
69: //#ifdef HAVE_SETENV
1.10 paf 70: if(value) {
71: if(prev_value) {
72: // MEM_LEAK_HERE
1.24 paf 73: char *buf=(char *)::malloc(strlen(prev_value)
1.10 paf 74: +strlen(value)
75: +1);
76: strcpy(buf, prev_value);
77: strcat(buf, value);
1.24 paf 78: value=buf;
79: }
1.10 paf 80:
1.24 paf 81: return setenv(name, value, 1/*overwrite*/);
1.10 paf 82: } else {
1.4 paf 83: unsetenv(name);
84: return 0;
85: }
86: #endif
87: }
88:
1.1 parser 89: static char *lsplit(char *string, char delim) {
90: if(string) {
91: char *v=strchr(string, delim);
92: if(v) {
93: *v=0;
94: return v+1;
95: }
96: }
97: return 0;
98: }
99:
1.4 paf 100: static char *lsplit(char **string_ref, char delim) {
101: char *result=*string_ref;
102: char *next=lsplit(*string_ref, delim);
103: *string_ref=next;
104: return result;
105: }
106:
1.10 paf 107: static const char *options2env(char *options) {
1.5 paf 108: while(options) {
109: if(char *key=lsplit(&options, '&')) {
110: if(*key) {
111: if(char *value=lsplit(key, '=')) {
1.10 paf 112: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
113: if(do_append)
114: key[strlen(key)-1]=0; // remove trailing +
1.5 paf 115: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
116: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
117: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
1.10 paf 118: || do_append
1.5 paf 119: ) {
1.10 paf 120: if(pa_setenv(key, value, do_append)!=0)
1.5 paf 121: return "problem changing process environment" /*key*/;
122: } else
1.10 paf 123: return "unknown option (option must start with ORACLE_, ORA_ or NLS_)" /*key*/;
1.5 paf 124: } else
1.10 paf 125: return "option without =value" /*key*/;
1.5 paf 126: }
127: }
128: }
129: return 0;
130: }
131:
1.1 parser 132: #ifndef DOXYGEN
133: struct OracleSQL_connection_struct {
134: jmp_buf mark; char error[MAX_STRING];
135: OCIEnv *envhp;
136: OCIServer *srvhp;
137: OCIError *errhp;
138: OCISvcCtx *svchp;
139: OCISession *usrhp;
140: };
141:
142: struct OracleSQL_query_lobs {
143: struct return_rows {
144: struct return_row {
145: OCILobLocator *locator; ub4 len;
146: int ind;
147: ub2 rcode;
148: } *row;
149: int count;
150: };
151: struct cbf_context_struct {
152: SQL_Driver_services *services;
153: OracleSQL_connection_struct *cs;
154: return_rows *rows;
155: };
156: struct Item {
157: const char *name_ptr; size_t name_size;
158: char *data_ptr; size_t data_size;
159: OCILobLocator *locator;
160: OCIBind *bind;
161: return_rows rows;
162: } items[MAX_IN_LOBS];
163: int count;
164: };
165: #endif
166:
167: // forwards
168: void check(
169: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
170: const char *step, sword status);
171: static sb4 cbf_no_data(
172: dvoid *ctxp,
173: OCIBind *bindp,
174: ub4 iter, ub4 index,
175: dvoid **bufpp,
176: ub4 *alenpp,
177: ub1 *piecep,
178: dvoid **indpp);
179: static sb4 cbf_get_data(dvoid *ctxp,
180: OCIBind *bindp,
181: ub4 iter, ub4 index,
182: dvoid **bufpp,
183: ub4 **alenp,
184: ub1 *piecep,
185: dvoid **indpp,
186: ub2 **rcodepp);
187: void tolower(char *out, const char *in, size_t size);
188:
189: /**
190: OracleSQL server driver
191: */
192: class OracleSQL_Driver : public SQL_Driver {
193: public:
194:
195: OracleSQL_Driver() : SQL_Driver() {
196: }
197:
198: /// get api version
199: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 200: /** initialize driver by loading sql dynamic link library
201: @todo ?objects=1 which would turn on OCI_OBJECT init flag
202: */
1.5 paf 203: const char *initialize(char *dlopen_file_spec) {
204: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 205:
206: const char *error=dlopen_file_spec?
207: dlink(dlopen_file_spec):"client library column is empty";
208: if(!error) {
1.10 paf 209: error=options2env(options);
1.1 parser 210:
1.5 paf 211: if(!error)
212: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
213: (dvoid * (*)(void *, unsigned int))0,
214: (dvoid * (*)(void*, void*, unsigned int))0,
215: (void (*)(void*, void*))0
216: );
1.1 parser 217: }
218:
219: return error;
220: }
221:
222: /** connect
223: @param used_only_in_connect_url
1.4 paf 224: format: @b user:pass@service?
225: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 226: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 227: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
228: ORA_ENCRYPT_LOGIN=TRUE
229:
230: @todo environment manupulation doesnt look thread safe
1.1 parser 231: */
232: void connect(
233: char *used_only_in_connect_url,
234: SQL_Driver_services& services,
235: void **connection ///< output: OracleSQL_connection_struct *
236: ) {
237: // connections are cross-request, do not use services._alloc [linked with request]
238: OracleSQL_connection_struct &cs=
239: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
240:
241: char *user=used_only_in_connect_url;
242: char *service=lsplit(user, '@');
243: char *pwd=lsplit(user, ':');
1.4 paf 244: char *options=lsplit(service, '?');
1.1 parser 245:
246: if(!(user && pwd && service))
247: services._throw("mailformed connect part, must be 'user:pass@service'");
248:
1.10 paf 249: if(const char *error=options2env(options))
1.5 paf 250: services._throw(error);
1.4 paf 251:
1.1 parser 252: if(setjmp(cs.mark))
253: services._throw(cs.error);
254:
255: // Allocate and initialize OCIError handle, attempt #1
256: /*
257: grabbed from sample
258: /server.804/a58234/oci_func.htm#446192
259: but doc
260: /server.804/a58234/oci_func.htm#446100
261: doesnt have this param listed as allowed
262: 8.1.6 client library barks as OCI_INVALID_HANDLE
263: and debugging revealed that OCI_HTYPE_ENV param value is invalid
264: later in doc
265: /server.804/a58234/oci_func.htm#446192
266: on OCIEnvInit thay say
267: "No changes are done to an already initialized handle"
268: think, this is some sort of backward compatibility wonder.
269: leaving as it is, and without check()
270: */
271: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
272: // Initialize an environment handle, attempt #2
273: check(services, cs, "EnvInit", OCIEnvInit(
274: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
275: // Allocate and initialize OCIError handle
276: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
277: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
278: // Allocate and initialize OCIServer handle
279: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
280: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
281: // Attach to a 'service'; initialize server context handle
282: check(services, cs, "ServerAttach", OCIServerAttach(
283: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
284: // Allocate and initialize OCISvcCtx handle
285: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
286: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
287: // set attribute server context in the service context
288: check(services, cs, "AttrSet server-service", OCIAttrSet(
289: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
290: (dvoid *)cs.srvhp, (ub4)0,
291: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
292: // allocate a user context handle
293: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
294: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
295: // set 'user' name
296: check(services, cs, "AttrSet user-session", OCIAttrSet(
297: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
298: (dvoid *)user, (ub4)strlen(user),
299: OCI_ATTR_USERNAME, cs.errhp));
300: // set 'pwd' password
301: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
302: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
303: (dvoid *)pwd, (ub4)strlen(pwd),
304: OCI_ATTR_PASSWORD, cs.errhp));
305: // Authenticate a user
306: check(services, cs, "SessionBegin", OCISessionBegin(
307: cs.svchp, cs.errhp, cs.usrhp,
308: OCI_CRED_RDBMS, OCI_DEFAULT));
309: // remember connection in session
310: check(services, cs, "AttrSet service-session", OCIAttrSet(
311: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
312: (dvoid *)cs.usrhp, (ub4)0,
313: OCI_ATTR_SESSION, cs.errhp));
314:
315: // return created connection
316: *(OracleSQL_connection_struct **)connection=&cs;
317: }
318: void disconnect(void *connection) {
319: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
320: // Terminate a user session
321: OCISessionEnd(
322: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
323: // Detach from a server; uninitialize server context handle
324: OCIServerDetach(
325: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
326: // Free a previously allocated handles
327: /*
328: oci will free them up as belonging to env
329: OCIHandleFree(
330: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
331: OCIHandleFree(
332: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
333: OCIHandleFree(
334: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
335: */
336: OCIHandleFree(
337: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
338:
339: // connections are cross-request, do not use services._alloc [linked with request]
340: ::free(&cs);
341: }
342: void commit(SQL_Driver_services& services, void *connection) {
343: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
344: if(setjmp(cs.mark))
345: services._throw(cs.error);
346:
347: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
348: }
349: void rollback(SQL_Driver_services& services, void *connection) {
350: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
351: if(setjmp(cs.mark))
352: services._throw(cs.error);
353:
354: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
355: }
356:
357: bool ping(SQL_Driver_services&, void *connection) {
358: // maybe OCIServerVersion?
1.4 paf 359: // select 0 from dual
1.1 parser 360: return true;
361: }
362:
363: unsigned int quote(
364: SQL_Driver_services&, void *,
365: char *to, const char *from, unsigned int length) {
1.15 paf 366: if(to) { // store mode
367: unsigned int result=length;
368: while(length--) {
369: switch(*from) {
370: case '\'': // "'" -> "''"
371: *to++='\''; result++;
372: break;
373: }
374: *to++=*from++;
1.1 parser 375: }
1.15 paf 376: return result;
377: } else // estimate mode
378: return length*2;
1.1 parser 379: }
380: void query(
381: SQL_Driver_services& services, void *connection,
382: const char *astatement, unsigned long offset, unsigned long limit,
383: SQL_Driver_query_event_handlers& handlers) {
384:
385: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
386: OracleSQL_query_lobs lobs={{0}, 0};
387: OCIStmt *stmthp=0;
388:
389: bool failed=false;
1.25 ! paf 390: SQL_Exception sql_exception;
1.1 parser 391: if(setjmp(cs.mark)) {
392: failed=true;
393: goto cleanup;
394: } else {
395: const char *statement=preprocess_statement(services, cs,
396: astatement, lobs);
397:
398: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
399: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
400: check(services, cs, "syntax",
401: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
402: (ub4)strlen((char *)statement),
403: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
404: {
405: for(int i=0; i<lobs.count; i++) {
406: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
407: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
408:
409: check(services, cs, "bind output", OCIBindByPos(stmthp,
410: &lobs.items[i].bind, cs.errhp,
411: (ub4)1+i,
412: (dvoid *)&lobs.items[i].locator,
413: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
414: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
415:
416: lobs.items[i].rows.count=0;
417: OracleSQL_query_lobs::cbf_context_struct cbf_context={
418: &services, &cs, &lobs.items[i].rows};
419: check(services, cs, "bind dynamic", OCIBindDynamic(
420: lobs.items[i].bind, cs.errhp,
421: (dvoid *) &cbf_context, cbf_no_data,
422: (dvoid *) &cbf_context, cbf_get_data));
423: }
424: }
425:
1.25 ! paf 426: try {
! 427: execute_prepared(services, cs,
! 428: statement, stmthp, lobs,
! 429: offset, limit, handlers);
! 430: } catch(const SQL_Exception& e) {
! 431: sql_exception=e;
! 432: } catch(...) {
! 433: sql_exception=SQL_Exception("exception occured in SQL_Driver_query_event_handlers"); // out of memory...
! 434: }
1.1 parser 435: }
436: cleanup: // no check call after this point!
437: {
438: for(int i=0; i<lobs.count; i++) {
439: /* free var locator */
440: if(OCILobLocator *locator=lobs.items[i].locator)
441: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
442:
443: /* free rows descriptors */
444: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
445: for(int r=0; r<rows.count; r++)
446: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
447: }
448: }
449: if(stmthp)
450: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
451:
452: if(failed)
453: services._throw(cs.error);
1.25 ! paf 454: if(sql_exception.defined())
! 455: services._throw(sql_exception);
1.1 parser 456: }
457:
458: private: // private funcs
459:
460: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
461: const char *astatement, OracleSQL_query_lobs &lobs) {
462: size_t statement_size=strlen(astatement);
463:
464: char *result=(char *)services.malloc(statement_size
465: +MAX_STRING // in case of short 'strings'
466: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
467: +1);
468: const char *o=astatement;
469:
470: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
471: char *n=result;
472: while(*o) {
473: if(
474: o[0]=='/' &&
475: o[1]=='*' &&
476: o[2]=='*') { // name start
477: o+=3;
478: const char *name_begin=o;
479: while(*o)
480: if(
481: o[0]=='*' &&
482: o[1]=='*' &&
483: o[2]=='/' &&
484: o[3]=='\'') { // name end
485: const char *name_end=o;
486: o+=4;
487: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
488: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
489: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
490:
491: const char *start=o;
492: bool escaped=false;
493: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 494: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 495: if(escaped) {
496: // write pending, skip "\" or "'"
497: if(size_t size=o-start) {
498: memcpy(item.data_ptr+item.data_size, start, size);
499: item.data_size+=size;
500: }
501: start=++o;
502: } else
503: o++;
504: }
505: if(size_t size=o-start) {
506: memcpy(item.data_ptr+item.data_size, start, size);
507: item.data_size+=size;
508: }
509: if(*o)
510: o++; // skip "'"
511:
512: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
513: break;
514: } else
515: o++; // /**skip**/'xxx'
516: } else
517: *n++=*o++;
518: }
519: *n=0;
520:
521: if(lobs.count) {
522: int i;
523: n+=sprintf(n, " returning ");
524: for(i=0; i<lobs.count; i++) {
525: if(i)
526: *n++=',';
527: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
528: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
529: n+=lobs.items[i].name_size;*/
530: }
531: n+=sprintf(n, " into ");
532: for(i=0; i<lobs.count; i++) {
533: if(i)
534: *n++='x';
535: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
536: /**n++=':';
537: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
538: n+=lobs.items[i].name_size;*/
539: }
540: }
541:
542: return result;
543: }
544:
545: void execute_prepared(
546: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
547: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
548: unsigned long offset, unsigned long limit,
549: SQL_Driver_query_event_handlers& handlers) {
550:
551: ub2 stmt_type=0; // UNKNOWN
552: /*
553: //gpfs on sun. paf 000818
554: //Zanyway, this is needed before.
555: check(services, cs, "get stmt type", OCIAttrGet(
556: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
557: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
558: */
1.16 paf 559:
1.17 paf 560: while(isspace(*statement))
1.16 paf 561: statement++;
1.1 parser 562: if(strncasecmp(statement, "select", 6)==0)
563: stmt_type=OCI_STMT_SELECT;
564: else if(strncasecmp(statement, "insert", 6)==0)
565: stmt_type=OCI_STMT_INSERT;
566: else if(strncasecmp(statement, "update", 6)==0)
567: stmt_type=OCI_STMT_UPDATE;
568:
569: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
570: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
571: (OCISnapshot *)NULL,
572: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
573:
574: if(status!=OCI_NO_DATA)
575: check(services, cs, "execute", status);
576:
577: {
578: for(int i=0; i<lobs.count; i++)
579: if(ub4 bytes_to_write=lobs.items[i].data_size) {
580: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
581: for(int r=0; r<rows->count; r++) {
582: OCILobLocator *locator=rows->row[r].locator;
583: check(services, cs, "lobwrite", OCILobWrite (
584: cs.svchp, cs.errhp,
585: locator, &bytes_to_write, 1,
586: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
587: (dvoid *)0, 0, (ub2)0,
588: (ub1) SQLCS_IMPLICIT));
589: }
590: }
591: }
592:
593: switch(stmt_type) {
594: case OCI_STMT_SELECT:
595: fetch_table(services, cs,
596: stmthp, offset, limit,
597: handlers);
598: break;
599: default:
600: /*
601: case OCI_STMT_INSERT:
602: case OCI_STMT_UPDATE:
603: */
604: break;
605: }
606: }
607:
608: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
609: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
610: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 611:
1.10 paf 612: ub4 prefetch_rows=100;
1.9 paf 613: check(services, cs, "AttrSet prefetch-rows", OCIAttrSet(
614: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
615: (dvoid *)&prefetch_rows, (ub4)0,
616: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
617:
1.20 paf 618: ub4 prefetch_mem_size=100*0x400;
1.9 paf 619: check(services, cs, "AttrSet prefetch-memory", OCIAttrSet(
620: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
621: (dvoid *)&prefetch_mem_size, (ub4)0,
622: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 623:
624: OCIParam *mypard;
625: ub2 dtype;
626: text *col_name;
627:
628: struct {
629: ub2 type;
630: char *str;
631: OCILobLocator *var;
632: OCIDefine *def;
633: sb2 indicator;
634: } cols[MAX_COLS]={0};
635: int column_count=0;
636:
637: bool failed=false;
638: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
639: if(setjmp(cs.mark)) {
640: failed=true;
641: goto cleanup;
642: } else {
643: // idea of preincrementing is that at error time all handles would free up
644: while(++column_count<=MAX_COLS) {
645: /* get next descriptor, if there is one */
646: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
1.3 paf 647: (ub4) column_count)!=OCI_SUCCESS) {
648: --column_count;
1.1 parser 649: break;
1.3 paf 650: }
1.1 parser 651:
652: /* Retrieve the data type attribute */
653: check(services, cs, "get type", OCIAttrGet(
654: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
655: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
656: (OCIError *)cs.errhp));
657:
658: /* Retrieve the column name attribute */
659: ub4 col_name_len;
660: check(services, cs, "get name", OCIAttrGet(
661: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
662: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
663: (OCIError *)cs.errhp));
664:
665: {
666: size_t size=(size_t)col_name_len;
667: char *ptr=(char *)services.malloc(size);
668: tolower(ptr, (char *)col_name, size);
669: handlers.add_column(ptr, size);
670: }
671:
672: ub2 coerce_type=dtype;
673: sb4 size=0;
674: void *ptr;
675:
676: switch(dtype) {
677: case SQLT_CLOB:
678: {
679: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
680: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
681: (ub4)OCI_DTYPE_LOB,
682: 0, (dvoid **)0));
683:
684: size=0;
685: break;
686: }
687: default:
688: coerce_type=SQLT_STR;
689: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
690: size=MAX_OUT_STRING_LENGTH;
691: break;
692: }
693:
694: cols[column_count-1].type=coerce_type;
695:
696: check(services, cs, "DefineByPos", OCIDefineByPos(
697: stmthp, &cols[column_count-1].def, cs.errhp,
698: column_count, (ub1 *) ptr, size,
699: coerce_type, (dvoid *) &cols[column_count-1].indicator,
700: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
701: }
702:
703: handlers.before_rows();
704:
1.20 paf 705: for(unsigned long row=0; !limit||row<offset+limit; row++) {
1.1 parser 706: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
707: (ub4)OCI_DEFAULT);
1.3 paf 708: if(status==OCI_NO_DATA)
1.1 parser 709: break;
1.3 paf 710: check(services, cs, "fetch", status);
711:
1.1 parser 712: if(row>=offset) {
713: handlers.add_row();
714: for(int i=0; i<column_count; i++) {
1.7 paf 715: size_t size=0;
716: void *ptr=0;
1.8 paf 717: if(!cols[i].indicator) // not NULL
1.1 parser 718: switch(cols[i].type) {
719: case SQLT_CLOB:
720: {
721: ub4 amtp=4096000000UL;
722: ub4 offset=1;
723: ub4 loblen=0;
724: OCILobLocator *var=(OCILobLocator *)cols[i].var;
725: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
726: if(loblen) {
727: size=(size_t)loblen;
728: ptr=services.malloc(size);
729: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
730: var, &amtp, offset, (dvoid *) ptr,
731: loblen, (dvoid *)0,
732: 0,
733: (ub2)0, (ub1) SQLCS_IMPLICIT));
734: }
735: break;
736: }
737: default:
738: if(const char *str=cols[i].str) {
739: size=strlen(str);
740: ptr=services.malloc(size);
741: memcpy(ptr, str, size);
742: } else {
743: size=0;
744: ptr=0;
745: }
746: break;
1.7 paf 747: }
1.1 parser 748: handlers.add_row_cell(ptr, size);
749: }
750: }
751: }
752: }
753:
754: cleanup: // no check call after this point!
755: for(int i=0; i<column_count; i++) {
756: switch(cols[i].type) {
757: case SQLT_CLOB:
758: /* free var locator */
759: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
760: break;
761: default:
762: break;
763: }
764: }
765:
766: if(failed) // need rethrow?
767: longjmp(saved_mark, 1);
768: }
769:
770: private: // conn client library funcs
771:
772: friend void check(
773: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
774: const char *step, sword status);
775: friend sb4 cbf_get_data(dvoid *ctxp,
776: OCIBind *bindp,
777: ub4 iter, ub4 index,
778: dvoid **bufpp,
779: ub4 **alenp,
780: ub1 *piecep,
781: dvoid **indpp,
782: ub2 **rcodepp);
783:
784:
785: #define OCI_DECL(name, params) \
786: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
787:
788: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
789: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
790: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
791: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
792:
793: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
794: size_t xtramem_sz, dvoid **usrmempp));
795:
796: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
797: dvoid *attributep, ub4 *sizep, ub4 attrtype,
798: OCIError *errhp));
799:
800: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
801: ub4 size, ub4 attrtype, OCIError *errhp));
802:
803: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
804: ub4 position, dvoid *valuep, sb4 value_sz,
805: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
806: ub4 maxarr_len, ub4 *curelep, ub4 mode));
807:
808: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
809: OCICallbackInBind icbfp, dvoid *octxp,
810: OCICallbackOutBind ocbfp));
811:
812: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
813: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
814: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
815:
816: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
817: CONST ub4 type, CONST size_t xtramem_sz,
818: dvoid **usrmempp));
819:
820: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
821:
822:
823: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
824: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
825:
826: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
827: CONST size_t xtramem_sz, dvoid **usrmempp));
828:
829: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
830:
831: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
832: OCILobLocator *locp,
833: ub4 *lenp));
834:
835: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
836: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
837: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
838: CONST dvoid *bufp,
839: ub4 len,
840: ub1 piece),
841: ub2 csid, ub1 csfrm));
842:
843: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
844: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
845: ub1 piece, dvoid *ctxp,
846: sb4 (*cbfp)(dvoid *ctxp,
847: dvoid *bufp,
848: ub4 *len,
849: ub1 *piece),
850: ub2 csid, ub1 csfrm));
851:
852: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
853: dvoid **parmdpp, ub4 pos));
854:
855: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
856: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
857:
858: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
859:
860: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
861: ub4 credt, ub4 mode));
862:
863: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
864: ub4 mode));
865:
866: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
867: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
868: OCISnapshot *snap_out, ub4 mode));
869:
870: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
871: ub2 orientation, ub4 mode));
872:
873: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
874: ub4 stmt_len, ub4 language, ub4 mode));
875:
876: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
877:
878: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
879:
880: private: // conn client library funcs linking
881:
882: const char *dlink(const char *dlopen_file_spec) {
883: if(lt_dlinit())
884:
885: return lt_dlerror();
886:
887:
888:
889: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
890:
891: //return "hren31";
892:
893: if(!handle)
894: return lt_dlerror(); //"can not open the dynamic link module";
895:
896: #define DSLINK(name, action) \
897: name=(t_##name)lt_dlsym(handle, #name); \
898: if(!name) \
899: action;
900:
901: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
902:
903: OCI_LINK(Initialize);
904: OCI_LINK(EnvInit);
905: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
906: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
907: OCI_LINK(DefineByPos);
908: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
909: OCI_LINK(ErrorGet);
910: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
911: OCI_LINK(LobGetLength);
912: OCI_LINK(LobRead); OCI_LINK(LobWrite);
913: OCI_LINK(ParamGet);
914: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
915: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
916: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
917: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
918:
919: return 0;
920: }
921:
922: } *OracleSQL_driver;
923:
924: void check(
925: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
926: const char *step, sword status) {
927:
928: const char *msg;
929: char reason[MAX_STRING/2];
930:
1.21 paf 931: const char *prefix="ERROR";
1.1 parser 932: switch (status) {
1.22 paf 933: case OCI_SUCCESS: // hurrah
934: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
935: // count() not counting them and gives that status
936: return;
1.1 parser 937: case OCI_ERROR:
938: {
939: sb4 errcode;
940: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
941: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
942: msg=reason;
943: else
944: msg="[can not get error description]";
945: break;
946: }
947: case OCI_NEED_DATA:
948: msg="NEED_DATA"; break;
949: case OCI_NO_DATA:
950: msg="NODATA"; break;
951: case OCI_INVALID_HANDLE:
952: msg="INVALID_HANDLE"; break;
953: case OCI_STILL_EXECUTING:
954: msg="STILL_EXECUTE"; break;
955: case OCI_CONTINUE:
956: msg="CONTINUE"; break;
957: default:
958: msg="unknown"; break;
959: }
960:
1.22 paf 961: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
962: msg, step, (int)status);
1.1 parser 963: longjmp(cs.mark, 1);
964: }
965:
966:
967: /* ----------------------------------------------------------------- */
968: /* Intbind callback that does not do any data input. */
969: /* ----------------------------------------------------------------- */
970: static sb4 cbf_no_data(
971: dvoid *ctxp,
972: OCIBind *bindp,
973: ub4 iter, ub4 index,
974: dvoid **bufpp,
975: ub4 *alenpp,
976: ub1 *piecep,
977: dvoid **indpp) {
978: *bufpp=(dvoid *)0;
979: *alenpp=0;
980: static sb2 null_ind=-1;
981: *indpp=(dvoid *) &null_ind;
982: *piecep=OCI_ONE_PIECE;
983:
984: return OCI_CONTINUE;
985: }
986:
987: /* ----------------------------------------------------------------- */
988: /* Outbind callback for returning data. */
989: /* ----------------------------------------------------------------- */
990: static sb4 cbf_get_data(dvoid *ctxp,
991: OCIBind *bindp,
992: ub4 iter, ub4 index,
993: dvoid **bufpp,
994: ub4 **alenp,
995: ub1 *piecep,
996: dvoid **indpp,
997: ub2 **rcodepp) {
998: OracleSQL_query_lobs::cbf_context_struct &context=
999: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
1000:
1001: if(index==0) {
1002: static ub4 rows;
1003: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1004: OracleSQL_driver->OCIAttrGet(
1005: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
1006: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1007: context.rows->count=(ub2)rows;
1008: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1009: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1010: }
1011:
1012: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1013:
1014: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1015: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1016: (ub4)OCI_DTYPE_LOB,
1017: 0, (dvoid **)0));
1018:
1019: *bufpp=var.locator;
1020: *alenp=&var.len;
1021: *indpp=(dvoid *) &var.ind;
1022: *piecep=OCI_ONE_PIECE;
1023: *rcodepp=&var.rcode;
1024:
1025: return OCI_CONTINUE;
1026: }
1027:
1028: void tolower(char *out, const char *in, size_t size) {
1029: while(size--)
1030: *out++=tolower(*in++);
1031: }
1032:
1033: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1034: //_asm int 3;
1035: return OracleSQL_driver=new OracleSQL_Driver();
1036: }