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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: */
1.20 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.19 2002/02/08 08:32:41 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: char *buf;
72: if(prev_value) {
73: // MEM_LEAK_HERE
74: buf=(char *)::malloc(strlen(prev_value)
75: +strlen(value)
76: +1);
77: strcpy(buf, prev_value);
78: strcat(buf, value);
79: } else
80: buf=value;
81:
82: return setenv(name, buf, 1/*overwrite*/);
83: } else {
1.4 paf 84: unsetenv(name);
85: return 0;
86: }
87: #endif
88: }
89:
1.1 parser 90: static char *lsplit(char *string, char delim) {
91: if(string) {
92: char *v=strchr(string, delim);
93: if(v) {
94: *v=0;
95: return v+1;
96: }
97: }
98: return 0;
99: }
100:
1.4 paf 101: static char *lsplit(char **string_ref, char delim) {
102: char *result=*string_ref;
103: char *next=lsplit(*string_ref, delim);
104: *string_ref=next;
105: return result;
106: }
107:
1.10 paf 108: static const char *options2env(char *options) {
1.5 paf 109: while(options) {
110: if(char *key=lsplit(&options, '&')) {
111: if(*key) {
112: if(char *value=lsplit(key, '=')) {
1.10 paf 113: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
114: if(do_append)
115: key[strlen(key)-1]=0; // remove trailing +
1.5 paf 116: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
117: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
118: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
1.10 paf 119: || do_append
1.5 paf 120: ) {
1.10 paf 121: if(pa_setenv(key, value, do_append)!=0)
1.5 paf 122: return "problem changing process environment" /*key*/;
123: } else
1.10 paf 124: return "unknown option (option must start with ORACLE_, ORA_ or NLS_)" /*key*/;
1.5 paf 125: } else
1.10 paf 126: return "option without =value" /*key*/;
1.5 paf 127: }
128: }
129: }
130: return 0;
131: }
132:
1.1 parser 133: #ifndef DOXYGEN
134: struct OracleSQL_connection_struct {
135: jmp_buf mark; char error[MAX_STRING];
136: OCIEnv *envhp;
137: OCIServer *srvhp;
138: OCIError *errhp;
139: OCISvcCtx *svchp;
140: OCISession *usrhp;
141: };
142:
143: struct OracleSQL_query_lobs {
144: struct return_rows {
145: struct return_row {
146: OCILobLocator *locator; ub4 len;
147: int ind;
148: ub2 rcode;
149: } *row;
150: int count;
151: };
152: struct cbf_context_struct {
153: SQL_Driver_services *services;
154: OracleSQL_connection_struct *cs;
155: return_rows *rows;
156: };
157: struct Item {
158: const char *name_ptr; size_t name_size;
159: char *data_ptr; size_t data_size;
160: OCILobLocator *locator;
161: OCIBind *bind;
162: return_rows rows;
163: } items[MAX_IN_LOBS];
164: int count;
165: };
166: #endif
167:
168: // forwards
169: void check(
170: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
171: const char *step, sword status);
172: static sb4 cbf_no_data(
173: dvoid *ctxp,
174: OCIBind *bindp,
175: ub4 iter, ub4 index,
176: dvoid **bufpp,
177: ub4 *alenpp,
178: ub1 *piecep,
179: dvoid **indpp);
180: static sb4 cbf_get_data(dvoid *ctxp,
181: OCIBind *bindp,
182: ub4 iter, ub4 index,
183: dvoid **bufpp,
184: ub4 **alenp,
185: ub1 *piecep,
186: dvoid **indpp,
187: ub2 **rcodepp);
188: void tolower(char *out, const char *in, size_t size);
189:
190: /**
191: OracleSQL server driver
192: */
193: class OracleSQL_Driver : public SQL_Driver {
194: public:
195:
196: OracleSQL_Driver() : SQL_Driver() {
197: }
198:
199: /// get api version
200: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 201: /** initialize driver by loading sql dynamic link library
202: @todo ?objects=1 which would turn on OCI_OBJECT init flag
203: */
1.5 paf 204: const char *initialize(char *dlopen_file_spec) {
205: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 206:
207: const char *error=dlopen_file_spec?
208: dlink(dlopen_file_spec):"client library column is empty";
209: if(!error) {
1.10 paf 210: error=options2env(options);
1.1 parser 211:
1.5 paf 212: if(!error)
213: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
214: (dvoid * (*)(void *, unsigned int))0,
215: (dvoid * (*)(void*, void*, unsigned int))0,
216: (void (*)(void*, void*))0
217: );
1.1 parser 218: }
219:
220: return error;
221: }
222:
223: /** connect
224: @param used_only_in_connect_url
1.4 paf 225: format: @b user:pass@service?
226: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 227: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 228: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
229: ORA_ENCRYPT_LOGIN=TRUE
230:
231: @todo environment manupulation doesnt look thread safe
1.1 parser 232: */
233: void connect(
234: char *used_only_in_connect_url,
235: SQL_Driver_services& services,
236: void **connection ///< output: OracleSQL_connection_struct *
237: ) {
238: // connections are cross-request, do not use services._alloc [linked with request]
239: OracleSQL_connection_struct &cs=
240: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
241:
242: char *user=used_only_in_connect_url;
243: char *service=lsplit(user, '@');
244: char *pwd=lsplit(user, ':');
1.4 paf 245: char *options=lsplit(service, '?');
1.1 parser 246:
247: if(!(user && pwd && service))
248: services._throw("mailformed connect part, must be 'user:pass@service'");
249:
1.10 paf 250: if(const char *error=options2env(options))
1.5 paf 251: services._throw(error);
1.4 paf 252:
1.1 parser 253: if(setjmp(cs.mark))
254: services._throw(cs.error);
255:
256: // Allocate and initialize OCIError handle, attempt #1
257: /*
258: grabbed from sample
259: /server.804/a58234/oci_func.htm#446192
260: but doc
261: /server.804/a58234/oci_func.htm#446100
262: doesnt have this param listed as allowed
263: 8.1.6 client library barks as OCI_INVALID_HANDLE
264: and debugging revealed that OCI_HTYPE_ENV param value is invalid
265: later in doc
266: /server.804/a58234/oci_func.htm#446192
267: on OCIEnvInit thay say
268: "No changes are done to an already initialized handle"
269: think, this is some sort of backward compatibility wonder.
270: leaving as it is, and without check()
271: */
272: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
273: // Initialize an environment handle, attempt #2
274: check(services, cs, "EnvInit", OCIEnvInit(
275: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
276: // Allocate and initialize OCIError handle
277: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
278: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
279: // Allocate and initialize OCIServer handle
280: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
281: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
282: // Attach to a 'service'; initialize server context handle
283: check(services, cs, "ServerAttach", OCIServerAttach(
284: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
285: // Allocate and initialize OCISvcCtx handle
286: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
287: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
288: // set attribute server context in the service context
289: check(services, cs, "AttrSet server-service", OCIAttrSet(
290: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
291: (dvoid *)cs.srvhp, (ub4)0,
292: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
293: // allocate a user context handle
294: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
295: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
296: // set 'user' name
297: check(services, cs, "AttrSet user-session", OCIAttrSet(
298: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
299: (dvoid *)user, (ub4)strlen(user),
300: OCI_ATTR_USERNAME, cs.errhp));
301: // set 'pwd' password
302: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
303: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
304: (dvoid *)pwd, (ub4)strlen(pwd),
305: OCI_ATTR_PASSWORD, cs.errhp));
306: // Authenticate a user
307: check(services, cs, "SessionBegin", OCISessionBegin(
308: cs.svchp, cs.errhp, cs.usrhp,
309: OCI_CRED_RDBMS, OCI_DEFAULT));
310: // remember connection in session
311: check(services, cs, "AttrSet service-session", OCIAttrSet(
312: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
313: (dvoid *)cs.usrhp, (ub4)0,
314: OCI_ATTR_SESSION, cs.errhp));
315:
316: // return created connection
317: *(OracleSQL_connection_struct **)connection=&cs;
318: }
319: void disconnect(void *connection) {
320: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
321: // Terminate a user session
322: OCISessionEnd(
323: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
324: // Detach from a server; uninitialize server context handle
325: OCIServerDetach(
326: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
327: // Free a previously allocated handles
328: /*
329: oci will free them up as belonging to env
330: OCIHandleFree(
331: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
332: OCIHandleFree(
333: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
334: OCIHandleFree(
335: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
336: */
337: OCIHandleFree(
338: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
339:
340: // connections are cross-request, do not use services._alloc [linked with request]
341: ::free(&cs);
342: }
343: void commit(SQL_Driver_services& services, void *connection) {
344: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
345: if(setjmp(cs.mark))
346: services._throw(cs.error);
347:
348: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
349: }
350: void rollback(SQL_Driver_services& services, void *connection) {
351: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
352: if(setjmp(cs.mark))
353: services._throw(cs.error);
354:
355: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
356: }
357:
358: bool ping(SQL_Driver_services&, void *connection) {
359: // maybe OCIServerVersion?
1.4 paf 360: // select 0 from dual
1.1 parser 361: return true;
362: }
363:
364: unsigned int quote(
365: SQL_Driver_services&, void *,
366: char *to, const char *from, unsigned int length) {
1.15 paf 367: if(to) { // store mode
368: unsigned int result=length;
369: while(length--) {
370: switch(*from) {
371: case '\'': // "'" -> "''"
372: *to++='\''; result++;
373: break;
374: }
375: *to++=*from++;
1.1 parser 376: }
1.15 paf 377: return result;
378: } else // estimate mode
379: return length*2;
1.1 parser 380: }
381: void query(
382: SQL_Driver_services& services, void *connection,
383: const char *astatement, unsigned long offset, unsigned long limit,
384: SQL_Driver_query_event_handlers& handlers) {
385:
386: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
387: OracleSQL_query_lobs lobs={{0}, 0};
388: OCIStmt *stmthp=0;
389:
390: bool failed=false;
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:
426: execute_prepared(services, cs,
427: statement, stmthp, lobs,
428: offset, limit, handlers);
429: }
430: cleanup: // no check call after this point!
431: {
432: for(int i=0; i<lobs.count; i++) {
433: /* free var locator */
434: if(OCILobLocator *locator=lobs.items[i].locator)
435: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
436:
437: /* free rows descriptors */
438: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
439: for(int r=0; r<rows.count; r++)
440: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
441: }
442: }
443: if(stmthp)
444: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
445:
446: if(failed)
447: services._throw(cs.error);
448: }
449:
450: private: // private funcs
451:
452: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
453: const char *astatement, OracleSQL_query_lobs &lobs) {
454: size_t statement_size=strlen(astatement);
455:
456: char *result=(char *)services.malloc(statement_size
457: +MAX_STRING // in case of short 'strings'
458: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
459: +1);
460: const char *o=astatement;
461:
462: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
463: char *n=result;
464: while(*o) {
465: if(
466: o[0]=='/' &&
467: o[1]=='*' &&
468: o[2]=='*') { // name start
469: o+=3;
470: const char *name_begin=o;
471: while(*o)
472: if(
473: o[0]=='*' &&
474: o[1]=='*' &&
475: o[2]=='/' &&
476: o[3]=='\'') { // name end
477: const char *name_end=o;
478: o+=4;
479: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
480: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
481: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
482:
483: const char *start=o;
484: bool escaped=false;
485: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 486: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 487: if(escaped) {
488: // write pending, skip "\" or "'"
489: if(size_t size=o-start) {
490: memcpy(item.data_ptr+item.data_size, start, size);
491: item.data_size+=size;
492: }
493: start=++o;
494: } else
495: o++;
496: }
497: if(size_t size=o-start) {
498: memcpy(item.data_ptr+item.data_size, start, size);
499: item.data_size+=size;
500: }
501: if(*o)
502: o++; // skip "'"
503:
504: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
505: break;
506: } else
507: o++; // /**skip**/'xxx'
508: } else
509: *n++=*o++;
510: }
511: *n=0;
512:
513: if(lobs.count) {
514: int i;
515: n+=sprintf(n, " returning ");
516: for(i=0; i<lobs.count; i++) {
517: if(i)
518: *n++=',';
519: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
520: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
521: n+=lobs.items[i].name_size;*/
522: }
523: n+=sprintf(n, " into ");
524: for(i=0; i<lobs.count; i++) {
525: if(i)
526: *n++='x';
527: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
528: /**n++=':';
529: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
530: n+=lobs.items[i].name_size;*/
531: }
532: }
533:
534: return result;
535: }
536:
537: void execute_prepared(
538: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
539: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
540: unsigned long offset, unsigned long limit,
541: SQL_Driver_query_event_handlers& handlers) {
542:
543: ub2 stmt_type=0; // UNKNOWN
544: /*
545: //gpfs on sun. paf 000818
546: //Zanyway, this is needed before.
547: check(services, cs, "get stmt type", OCIAttrGet(
548: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
549: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
550: */
1.16 paf 551:
1.17 paf 552: while(isspace(*statement))
1.16 paf 553: statement++;
1.1 parser 554: if(strncasecmp(statement, "select", 6)==0)
555: stmt_type=OCI_STMT_SELECT;
556: else if(strncasecmp(statement, "insert", 6)==0)
557: stmt_type=OCI_STMT_INSERT;
558: else if(strncasecmp(statement, "update", 6)==0)
559: stmt_type=OCI_STMT_UPDATE;
560:
561: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
562: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
563: (OCISnapshot *)NULL,
564: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
565:
566: if(status!=OCI_NO_DATA)
567: check(services, cs, "execute", status);
568:
569: {
570: for(int i=0; i<lobs.count; i++)
571: if(ub4 bytes_to_write=lobs.items[i].data_size) {
572: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
573: for(int r=0; r<rows->count; r++) {
574: OCILobLocator *locator=rows->row[r].locator;
575: check(services, cs, "lobwrite", OCILobWrite (
576: cs.svchp, cs.errhp,
577: locator, &bytes_to_write, 1,
578: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
579: (dvoid *)0, 0, (ub2)0,
580: (ub1) SQLCS_IMPLICIT));
581: }
582: }
583: }
584:
585: switch(stmt_type) {
586: case OCI_STMT_SELECT:
587: fetch_table(services, cs,
588: stmthp, offset, limit,
589: handlers);
590: break;
591: default:
592: /*
593: case OCI_STMT_INSERT:
594: case OCI_STMT_UPDATE:
595: */
596: break;
597: }
598: }
599:
600: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
601: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
602: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 603:
1.10 paf 604: ub4 prefetch_rows=100;
1.9 paf 605: check(services, cs, "AttrSet prefetch-rows", OCIAttrSet(
606: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
607: (dvoid *)&prefetch_rows, (ub4)0,
608: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
609:
1.20 ! paf 610: ub4 prefetch_mem_size=100*0x400;
1.9 paf 611: check(services, cs, "AttrSet prefetch-memory", OCIAttrSet(
612: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
613: (dvoid *)&prefetch_mem_size, (ub4)0,
614: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 615:
616: OCIParam *mypard;
617: ub2 dtype;
618: text *col_name;
619:
620: struct {
621: ub2 type;
622: char *str;
623: OCILobLocator *var;
624: OCIDefine *def;
625: sb2 indicator;
626: } cols[MAX_COLS]={0};
627: int column_count=0;
628:
629: bool failed=false;
630: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
631: if(setjmp(cs.mark)) {
632: failed=true;
633: goto cleanup;
634: } else {
635: // idea of preincrementing is that at error time all handles would free up
636: while(++column_count<=MAX_COLS) {
637: /* get next descriptor, if there is one */
638: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
1.3 paf 639: (ub4) column_count)!=OCI_SUCCESS) {
640: --column_count;
1.1 parser 641: break;
1.3 paf 642: }
1.1 parser 643:
644: /* Retrieve the data type attribute */
645: check(services, cs, "get type", OCIAttrGet(
646: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
647: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
648: (OCIError *)cs.errhp));
649:
650: /* Retrieve the column name attribute */
651: ub4 col_name_len;
652: check(services, cs, "get name", OCIAttrGet(
653: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
654: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
655: (OCIError *)cs.errhp));
656:
657: {
658: size_t size=(size_t)col_name_len;
659: char *ptr=(char *)services.malloc(size);
660: tolower(ptr, (char *)col_name, size);
661: handlers.add_column(ptr, size);
662: }
663:
664: ub2 coerce_type=dtype;
665: sb4 size=0;
666: void *ptr;
667:
668: switch(dtype) {
669: case SQLT_CLOB:
670: {
671: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
672: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
673: (ub4)OCI_DTYPE_LOB,
674: 0, (dvoid **)0));
675:
676: size=0;
677: break;
678: }
679: default:
680: coerce_type=SQLT_STR;
681: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
682: size=MAX_OUT_STRING_LENGTH;
683: break;
684: }
685:
686: cols[column_count-1].type=coerce_type;
687:
688: check(services, cs, "DefineByPos", OCIDefineByPos(
689: stmthp, &cols[column_count-1].def, cs.errhp,
690: column_count, (ub1 *) ptr, size,
691: coerce_type, (dvoid *) &cols[column_count-1].indicator,
692: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
693: }
694:
695: handlers.before_rows();
696:
1.20 ! paf 697: for(unsigned long row=0; !limit||row<offset+limit; row++) {
1.1 parser 698: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
699: (ub4)OCI_DEFAULT);
1.3 paf 700: if(status==OCI_NO_DATA)
1.1 parser 701: break;
1.3 paf 702: check(services, cs, "fetch", status);
703:
1.1 parser 704: if(row>=offset) {
705: handlers.add_row();
706: for(int i=0; i<column_count; i++) {
1.7 paf 707: size_t size=0;
708: void *ptr=0;
1.8 paf 709: if(!cols[i].indicator) // not NULL
1.1 parser 710: switch(cols[i].type) {
711: case SQLT_CLOB:
712: {
713: ub4 amtp=4096000000UL;
714: ub4 offset=1;
715: ub4 loblen=0;
716: OCILobLocator *var=(OCILobLocator *)cols[i].var;
717: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
718: if(loblen) {
719: size=(size_t)loblen;
720: ptr=services.malloc(size);
721: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
722: var, &amtp, offset, (dvoid *) ptr,
723: loblen, (dvoid *)0,
724: 0,
725: (ub2)0, (ub1) SQLCS_IMPLICIT));
726: }
727: break;
728: }
729: default:
730: if(const char *str=cols[i].str) {
731: size=strlen(str);
732: ptr=services.malloc(size);
733: memcpy(ptr, str, size);
734: } else {
735: size=0;
736: ptr=0;
737: }
738: break;
1.7 paf 739: }
1.1 parser 740: handlers.add_row_cell(ptr, size);
741: }
742: }
743: }
744: }
745:
746: cleanup: // no check call after this point!
747: for(int i=0; i<column_count; i++) {
748: switch(cols[i].type) {
749: case SQLT_CLOB:
750: /* free var locator */
751: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
752: break;
753: default:
754: break;
755: }
756: }
757:
758: if(failed) // need rethrow?
759: longjmp(saved_mark, 1);
760: }
761:
762: private: // conn client library funcs
763:
764: friend void check(
765: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
766: const char *step, sword status);
767: friend sb4 cbf_get_data(dvoid *ctxp,
768: OCIBind *bindp,
769: ub4 iter, ub4 index,
770: dvoid **bufpp,
771: ub4 **alenp,
772: ub1 *piecep,
773: dvoid **indpp,
774: ub2 **rcodepp);
775:
776:
777: #define OCI_DECL(name, params) \
778: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
779:
780: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
781: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
782: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
783: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
784:
785: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
786: size_t xtramem_sz, dvoid **usrmempp));
787:
788: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
789: dvoid *attributep, ub4 *sizep, ub4 attrtype,
790: OCIError *errhp));
791:
792: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
793: ub4 size, ub4 attrtype, OCIError *errhp));
794:
795: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
796: ub4 position, dvoid *valuep, sb4 value_sz,
797: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
798: ub4 maxarr_len, ub4 *curelep, ub4 mode));
799:
800: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
801: OCICallbackInBind icbfp, dvoid *octxp,
802: OCICallbackOutBind ocbfp));
803:
804: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
805: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
806: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
807:
808: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
809: CONST ub4 type, CONST size_t xtramem_sz,
810: dvoid **usrmempp));
811:
812: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
813:
814:
815: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
816: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
817:
818: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
819: CONST size_t xtramem_sz, dvoid **usrmempp));
820:
821: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
822:
823: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
824: OCILobLocator *locp,
825: ub4 *lenp));
826:
827: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
828: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
829: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
830: CONST dvoid *bufp,
831: ub4 len,
832: ub1 piece),
833: ub2 csid, ub1 csfrm));
834:
835: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
836: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
837: ub1 piece, dvoid *ctxp,
838: sb4 (*cbfp)(dvoid *ctxp,
839: dvoid *bufp,
840: ub4 *len,
841: ub1 *piece),
842: ub2 csid, ub1 csfrm));
843:
844: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
845: dvoid **parmdpp, ub4 pos));
846:
847: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
848: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
849:
850: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
851:
852: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
853: ub4 credt, ub4 mode));
854:
855: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
856: ub4 mode));
857:
858: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
859: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
860: OCISnapshot *snap_out, ub4 mode));
861:
862: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
863: ub2 orientation, ub4 mode));
864:
865: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
866: ub4 stmt_len, ub4 language, ub4 mode));
867:
868: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
869:
870: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
871:
872: private: // conn client library funcs linking
873:
874: const char *dlink(const char *dlopen_file_spec) {
875: if(lt_dlinit())
876:
877: return lt_dlerror();
878:
879:
880:
881: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
882:
883: //return "hren31";
884:
885: if(!handle)
886: return lt_dlerror(); //"can not open the dynamic link module";
887:
888: #define DSLINK(name, action) \
889: name=(t_##name)lt_dlsym(handle, #name); \
890: if(!name) \
891: action;
892:
893: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
894:
895: OCI_LINK(Initialize);
896: OCI_LINK(EnvInit);
897: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
898: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
899: OCI_LINK(DefineByPos);
900: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
901: OCI_LINK(ErrorGet);
902: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
903: OCI_LINK(LobGetLength);
904: OCI_LINK(LobRead); OCI_LINK(LobWrite);
905: OCI_LINK(ParamGet);
906: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
907: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
908: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
909: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
910:
911: return 0;
912: }
913:
914: } *OracleSQL_driver;
915:
916: void check(
917: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
918: const char *step, sword status) {
919:
920: const char *msg;
921: char reason[MAX_STRING/2];
922:
923: switch (status) {
924: case OCI_SUCCESS:
925: return; // hurrah
926: case OCI_ERROR:
927: {
928: sb4 errcode;
929: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
930: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
931: msg=reason;
932: else
933: msg="[can not get error description]";
934: break;
935: }
936: case OCI_SUCCESS_WITH_INFO:
937: msg="SUCCESS_WITH_INFO"; break;
938: case OCI_NEED_DATA:
939: msg="NEED_DATA"; break;
940: case OCI_NO_DATA:
941: msg="NODATA"; break;
942: case OCI_INVALID_HANDLE:
943: msg="INVALID_HANDLE"; break;
944: case OCI_STILL_EXECUTING:
945: msg="STILL_EXECUTE"; break;
946: case OCI_CONTINUE:
947: msg="CONTINUE"; break;
948: default:
949: msg="unknown"; break;
950: }
951:
952: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
953: msg, step, (int)status);
954: longjmp(cs.mark, 1);
955: }
956:
957:
958: /* ----------------------------------------------------------------- */
959: /* Intbind callback that does not do any data input. */
960: /* ----------------------------------------------------------------- */
961: static sb4 cbf_no_data(
962: dvoid *ctxp,
963: OCIBind *bindp,
964: ub4 iter, ub4 index,
965: dvoid **bufpp,
966: ub4 *alenpp,
967: ub1 *piecep,
968: dvoid **indpp) {
969: *bufpp=(dvoid *)0;
970: *alenpp=0;
971: static sb2 null_ind=-1;
972: *indpp=(dvoid *) &null_ind;
973: *piecep=OCI_ONE_PIECE;
974:
975: return OCI_CONTINUE;
976: }
977:
978: /* ----------------------------------------------------------------- */
979: /* Outbind callback for returning data. */
980: /* ----------------------------------------------------------------- */
981: static sb4 cbf_get_data(dvoid *ctxp,
982: OCIBind *bindp,
983: ub4 iter, ub4 index,
984: dvoid **bufpp,
985: ub4 **alenp,
986: ub1 *piecep,
987: dvoid **indpp,
988: ub2 **rcodepp) {
989: OracleSQL_query_lobs::cbf_context_struct &context=
990: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
991:
992: if(index==0) {
993: static ub4 rows;
994: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
995: OracleSQL_driver->OCIAttrGet(
996: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
997: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
998: context.rows->count=(ub2)rows;
999: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1000: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1001: }
1002:
1003: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1004:
1005: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1006: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1007: (ub4)OCI_DTYPE_LOB,
1008: 0, (dvoid **)0));
1009:
1010: *bufpp=var.locator;
1011: *alenp=&var.len;
1012: *indpp=(dvoid *) &var.ind;
1013: *piecep=OCI_ONE_PIECE;
1014: *rcodepp=&var.rcode;
1015:
1016: return OCI_CONTINUE;
1017: }
1018:
1019: void tolower(char *out, const char *in, size_t size) {
1020: while(size--)
1021: *out++=tolower(*in++);
1022: }
1023:
1024: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1025: //_asm int 3;
1026: return OracleSQL_driver=new OracleSQL_Driver();
1027: }