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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 [@test tested with Oracle 7.x.x]
9: */
1.16 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.15 2001/11/16 12:39:06 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: @test NLS_LANG=AMERICAN_AMERICA.CL8MSWIN1251
193: */
194: class OracleSQL_Driver : public SQL_Driver {
195: public:
196:
197: OracleSQL_Driver() : SQL_Driver() {
198: }
199:
200: /// get api version
201: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 202: /** initialize driver by loading sql dynamic link library
203: @todo ?objects=1 which would turn on OCI_OBJECT init flag
204: */
1.5 paf 205: const char *initialize(char *dlopen_file_spec) {
206: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 207:
208: const char *error=dlopen_file_spec?
209: dlink(dlopen_file_spec):"client library column is empty";
210: if(!error) {
1.10 paf 211: error=options2env(options);
1.1 parser 212:
1.5 paf 213: if(!error)
214: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
215: (dvoid * (*)(void *, unsigned int))0,
216: (dvoid * (*)(void*, void*, unsigned int))0,
217: (void (*)(void*, void*))0
218: );
1.1 parser 219: }
220:
221: return error;
222: }
223:
224: /** connect
225: @param used_only_in_connect_url
1.4 paf 226: format: @b user:pass@service?
227: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 228: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 229: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
230: ORA_ENCRYPT_LOGIN=TRUE
231:
232: @todo environment manupulation doesnt look thread safe
1.1 parser 233: */
234: void connect(
235: char *used_only_in_connect_url,
236: SQL_Driver_services& services,
237: void **connection ///< output: OracleSQL_connection_struct *
238: ) {
239: // connections are cross-request, do not use services._alloc [linked with request]
240: OracleSQL_connection_struct &cs=
241: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
242:
243: char *user=used_only_in_connect_url;
244: char *service=lsplit(user, '@');
245: char *pwd=lsplit(user, ':');
1.4 paf 246: char *options=lsplit(service, '?');
1.1 parser 247:
248: if(!(user && pwd && service))
249: services._throw("mailformed connect part, must be 'user:pass@service'");
250:
1.10 paf 251: if(const char *error=options2env(options))
1.5 paf 252: services._throw(error);
1.4 paf 253:
1.1 parser 254: if(setjmp(cs.mark))
255: services._throw(cs.error);
256:
257: // Allocate and initialize OCIError handle, attempt #1
258: /*
259: grabbed from sample
260: /server.804/a58234/oci_func.htm#446192
261: but doc
262: /server.804/a58234/oci_func.htm#446100
263: doesnt have this param listed as allowed
264: 8.1.6 client library barks as OCI_INVALID_HANDLE
265: and debugging revealed that OCI_HTYPE_ENV param value is invalid
266: later in doc
267: /server.804/a58234/oci_func.htm#446192
268: on OCIEnvInit thay say
269: "No changes are done to an already initialized handle"
270: think, this is some sort of backward compatibility wonder.
271: leaving as it is, and without check()
272: */
273: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
274: // Initialize an environment handle, attempt #2
275: check(services, cs, "EnvInit", OCIEnvInit(
276: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
277: // Allocate and initialize OCIError handle
278: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
279: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
280: // Allocate and initialize OCIServer handle
281: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
282: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
283: // Attach to a 'service'; initialize server context handle
284: check(services, cs, "ServerAttach", OCIServerAttach(
285: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
286: // Allocate and initialize OCISvcCtx handle
287: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
288: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
289: // set attribute server context in the service context
290: check(services, cs, "AttrSet server-service", OCIAttrSet(
291: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
292: (dvoid *)cs.srvhp, (ub4)0,
293: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
294: // allocate a user context handle
295: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
296: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
297: // set 'user' name
298: check(services, cs, "AttrSet user-session", OCIAttrSet(
299: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
300: (dvoid *)user, (ub4)strlen(user),
301: OCI_ATTR_USERNAME, cs.errhp));
302: // set 'pwd' password
303: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
304: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
305: (dvoid *)pwd, (ub4)strlen(pwd),
306: OCI_ATTR_PASSWORD, cs.errhp));
307: // Authenticate a user
308: check(services, cs, "SessionBegin", OCISessionBegin(
309: cs.svchp, cs.errhp, cs.usrhp,
310: OCI_CRED_RDBMS, OCI_DEFAULT));
311: // remember connection in session
312: check(services, cs, "AttrSet service-session", OCIAttrSet(
313: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
314: (dvoid *)cs.usrhp, (ub4)0,
315: OCI_ATTR_SESSION, cs.errhp));
316:
317: // return created connection
318: *(OracleSQL_connection_struct **)connection=&cs;
319: }
320: void disconnect(void *connection) {
321: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
322: // Terminate a user session
323: OCISessionEnd(
324: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
325: // Detach from a server; uninitialize server context handle
326: OCIServerDetach(
327: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
328: // Free a previously allocated handles
329: /*
330: oci will free them up as belonging to env
331: OCIHandleFree(
332: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
333: OCIHandleFree(
334: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
335: OCIHandleFree(
336: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
337: */
338: OCIHandleFree(
339: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
340:
341: // connections are cross-request, do not use services._alloc [linked with request]
342: ::free(&cs);
343: }
344: void commit(SQL_Driver_services& services, void *connection) {
345: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
346: if(setjmp(cs.mark))
347: services._throw(cs.error);
348:
349: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
350: }
351: void rollback(SQL_Driver_services& services, void *connection) {
352: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
353: if(setjmp(cs.mark))
354: services._throw(cs.error);
355:
356: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
357: }
358:
359: bool ping(SQL_Driver_services&, void *connection) {
360: // maybe OCIServerVersion?
1.4 paf 361: // select 0 from dual
1.1 parser 362: return true;
363: }
364:
365: unsigned int quote(
366: SQL_Driver_services&, void *,
367: char *to, const char *from, unsigned int length) {
1.15 paf 368: if(to) { // store mode
369: unsigned int result=length;
370: while(length--) {
371: switch(*from) {
372: case '\'': // "'" -> "''"
373: *to++='\''; result++;
374: break;
375: }
376: *to++=*from++;
1.1 parser 377: }
1.15 paf 378: return result;
379: } else // estimate mode
380: return length*2;
1.1 parser 381: }
382: void query(
383: SQL_Driver_services& services, void *connection,
384: const char *astatement, unsigned long offset, unsigned long limit,
385: SQL_Driver_query_event_handlers& handlers) {
386:
387: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
388: OracleSQL_query_lobs lobs={{0}, 0};
389: OCIStmt *stmthp=0;
390:
391: bool failed=false;
392: if(setjmp(cs.mark)) {
393: failed=true;
394: goto cleanup;
395: } else {
396: const char *statement=preprocess_statement(services, cs,
397: astatement, lobs);
398:
399: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
400: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
401: check(services, cs, "syntax",
402: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
403: (ub4)strlen((char *)statement),
404: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
405: {
406: for(int i=0; i<lobs.count; i++) {
407: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
408: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
409:
410: check(services, cs, "bind output", OCIBindByPos(stmthp,
411: &lobs.items[i].bind, cs.errhp,
412: (ub4)1+i,
413: (dvoid *)&lobs.items[i].locator,
414: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
415: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
416:
417: lobs.items[i].rows.count=0;
418: OracleSQL_query_lobs::cbf_context_struct cbf_context={
419: &services, &cs, &lobs.items[i].rows};
420: check(services, cs, "bind dynamic", OCIBindDynamic(
421: lobs.items[i].bind, cs.errhp,
422: (dvoid *) &cbf_context, cbf_no_data,
423: (dvoid *) &cbf_context, cbf_get_data));
424: }
425: }
426:
427: execute_prepared(services, cs,
428: statement, stmthp, lobs,
429: offset, limit, handlers);
430: }
431: cleanup: // no check call after this point!
432: {
433: for(int i=0; i<lobs.count; i++) {
434: /* free var locator */
435: if(OCILobLocator *locator=lobs.items[i].locator)
436: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
437:
438: /* free rows descriptors */
439: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
440: for(int r=0; r<rows.count; r++)
441: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
442: }
443: }
444: if(stmthp)
445: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
446:
447: if(failed)
448: services._throw(cs.error);
449: }
450:
451: private: // private funcs
452:
453: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
454: const char *astatement, OracleSQL_query_lobs &lobs) {
455: size_t statement_size=strlen(astatement);
456:
457: char *result=(char *)services.malloc(statement_size
458: +MAX_STRING // in case of short 'strings'
459: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
460: +1);
461: const char *o=astatement;
462:
463: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
464: char *n=result;
465: while(*o) {
466: if(
467: o[0]=='/' &&
468: o[1]=='*' &&
469: o[2]=='*') { // name start
470: o+=3;
471: const char *name_begin=o;
472: while(*o)
473: if(
474: o[0]=='*' &&
475: o[1]=='*' &&
476: o[2]=='/' &&
477: o[3]=='\'') { // name end
478: const char *name_end=o;
479: o+=4;
480: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
481: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
482: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
483:
484: const char *start=o;
485: bool escaped=false;
486: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 487: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 488: if(escaped) {
489: // write pending, skip "\" or "'"
490: if(size_t size=o-start) {
491: memcpy(item.data_ptr+item.data_size, start, size);
492: item.data_size+=size;
493: }
494: start=++o;
495: } else
496: o++;
497: }
498: if(size_t size=o-start) {
499: memcpy(item.data_ptr+item.data_size, start, size);
500: item.data_size+=size;
501: }
502: if(*o)
503: o++; // skip "'"
504:
505: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
506: break;
507: } else
508: o++; // /**skip**/'xxx'
509: } else
510: *n++=*o++;
511: }
512: *n=0;
513:
514: if(lobs.count) {
515: int i;
516: n+=sprintf(n, " returning ");
517: for(i=0; i<lobs.count; i++) {
518: if(i)
519: *n++=',';
520: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
521: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
522: n+=lobs.items[i].name_size;*/
523: }
524: n+=sprintf(n, " into ");
525: for(i=0; i<lobs.count; i++) {
526: if(i)
527: *n++='x';
528: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
529: /**n++=':';
530: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
531: n+=lobs.items[i].name_size;*/
532: }
533: }
534:
535: return result;
536: }
537:
538: void execute_prepared(
539: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
540: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
541: unsigned long offset, unsigned long limit,
542: SQL_Driver_query_event_handlers& handlers) {
543:
544: ub2 stmt_type=0; // UNKNOWN
545: /*
546: //gpfs on sun. paf 000818
547: //Zanyway, this is needed before.
548: check(services, cs, "get stmt type", OCIAttrGet(
549: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
550: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
551: */
1.16 ! paf 552:
! 553: while(*statement==' ' || *statement=='\t' || *statement=='\n')
! 554: statement++;
1.1 parser 555: if(strncasecmp(statement, "select", 6)==0)
556: stmt_type=OCI_STMT_SELECT;
557: else if(strncasecmp(statement, "insert", 6)==0)
558: stmt_type=OCI_STMT_INSERT;
559: else if(strncasecmp(statement, "update", 6)==0)
560: stmt_type=OCI_STMT_UPDATE;
561:
562: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
563: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
564: (OCISnapshot *)NULL,
565: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
566:
567: if(status!=OCI_NO_DATA)
568: check(services, cs, "execute", status);
569:
570: {
571: for(int i=0; i<lobs.count; i++)
572: if(ub4 bytes_to_write=lobs.items[i].data_size) {
573: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
574: for(int r=0; r<rows->count; r++) {
575: OCILobLocator *locator=rows->row[r].locator;
576: check(services, cs, "lobwrite", OCILobWrite (
577: cs.svchp, cs.errhp,
578: locator, &bytes_to_write, 1,
579: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
580: (dvoid *)0, 0, (ub2)0,
581: (ub1) SQLCS_IMPLICIT));
582: }
583: }
584: }
585:
586: switch(stmt_type) {
587: case OCI_STMT_SELECT:
588: fetch_table(services, cs,
589: stmthp, offset, limit,
590: handlers);
591: break;
592: default:
593: /*
594: case OCI_STMT_INSERT:
595: case OCI_STMT_UPDATE:
596: */
597: break;
598: }
599: }
600:
601: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
602: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
603: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 604:
1.10 paf 605: ub4 prefetch_rows=100;
1.9 paf 606: check(services, cs, "AttrSet prefetch-rows", OCIAttrSet(
607: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
608: (dvoid *)&prefetch_rows, (ub4)0,
609: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
610:
1.10 paf 611: ub4 prefetch_mem_size=100*1024;
1.9 paf 612: check(services, cs, "AttrSet prefetch-memory", OCIAttrSet(
613: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
614: (dvoid *)&prefetch_mem_size, (ub4)0,
615: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 616:
617: OCIParam *mypard;
618: ub2 dtype;
619: text *col_name;
620:
621: struct {
622: ub2 type;
623: char *str;
624: OCILobLocator *var;
625: OCIDefine *def;
626: sb2 indicator;
627: } cols[MAX_COLS]={0};
628: int column_count=0;
629:
630: bool failed=false;
631: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
632: if(setjmp(cs.mark)) {
633: failed=true;
634: goto cleanup;
635: } else {
636: // idea of preincrementing is that at error time all handles would free up
637: while(++column_count<=MAX_COLS) {
638: /* get next descriptor, if there is one */
639: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
1.3 paf 640: (ub4) column_count)!=OCI_SUCCESS) {
641: --column_count;
1.1 parser 642: break;
1.3 paf 643: }
1.1 parser 644:
645: /* Retrieve the data type attribute */
646: check(services, cs, "get type", OCIAttrGet(
647: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
648: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
649: (OCIError *)cs.errhp));
650:
651: /* Retrieve the column name attribute */
652: ub4 col_name_len;
653: check(services, cs, "get name", OCIAttrGet(
654: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
655: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
656: (OCIError *)cs.errhp));
657:
658: {
659: size_t size=(size_t)col_name_len;
660: char *ptr=(char *)services.malloc(size);
661: tolower(ptr, (char *)col_name, size);
662: handlers.add_column(ptr, size);
663: }
664:
665: ub2 coerce_type=dtype;
666: sb4 size=0;
667: void *ptr;
668:
669: switch(dtype) {
670: case SQLT_CLOB:
671: {
672: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
673: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
674: (ub4)OCI_DTYPE_LOB,
675: 0, (dvoid **)0));
676:
677: size=0;
678: break;
679: }
680: default:
681: coerce_type=SQLT_STR;
682: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
683: size=MAX_OUT_STRING_LENGTH;
684: break;
685: }
686:
687: cols[column_count-1].type=coerce_type;
688:
689: check(services, cs, "DefineByPos", OCIDefineByPos(
690: stmthp, &cols[column_count-1].def, cs.errhp,
691: column_count, (ub1 *) ptr, size,
692: coerce_type, (dvoid *) &cols[column_count-1].indicator,
693: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
694: }
695:
696: handlers.before_rows();
697:
698: for(unsigned long row=0; !limit||row<limit+offset; row++) {
699: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
700: (ub4)OCI_DEFAULT);
1.3 paf 701: if(status==OCI_NO_DATA)
1.1 parser 702: break;
1.3 paf 703: check(services, cs, "fetch", status);
704:
1.1 parser 705: if(row>=offset) {
706: handlers.add_row();
707: for(int i=0; i<column_count; i++) {
1.7 paf 708: size_t size=0;
709: void *ptr=0;
1.8 paf 710: if(!cols[i].indicator) // not NULL
1.1 parser 711: switch(cols[i].type) {
712: case SQLT_CLOB:
713: {
714: ub4 amtp=4096000000UL;
715: ub4 offset=1;
716: ub4 loblen=0;
717: OCILobLocator *var=(OCILobLocator *)cols[i].var;
718: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
719: if(loblen) {
720: size=(size_t)loblen;
721: ptr=services.malloc(size);
722: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
723: var, &amtp, offset, (dvoid *) ptr,
724: loblen, (dvoid *)0,
725: 0,
726: (ub2)0, (ub1) SQLCS_IMPLICIT));
727: }
728: break;
729: }
730: default:
731: if(const char *str=cols[i].str) {
732: size=strlen(str);
733: ptr=services.malloc(size);
734: memcpy(ptr, str, size);
735: } else {
736: size=0;
737: ptr=0;
738: }
739: break;
1.7 paf 740: }
1.1 parser 741: handlers.add_row_cell(ptr, size);
742: }
743: }
744: }
745: }
746:
747: cleanup: // no check call after this point!
748: for(int i=0; i<column_count; i++) {
749: switch(cols[i].type) {
750: case SQLT_CLOB:
751: /* free var locator */
752: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
753: break;
754: default:
755: break;
756: }
757: }
758:
759: if(failed) // need rethrow?
760: longjmp(saved_mark, 1);
761: }
762:
763: private: // conn client library funcs
764:
765: friend void check(
766: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
767: const char *step, sword status);
768: friend sb4 cbf_get_data(dvoid *ctxp,
769: OCIBind *bindp,
770: ub4 iter, ub4 index,
771: dvoid **bufpp,
772: ub4 **alenp,
773: ub1 *piecep,
774: dvoid **indpp,
775: ub2 **rcodepp);
776:
777:
778: #define OCI_DECL(name, params) \
779: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
780:
781: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
782: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
783: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
784: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
785:
786: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
787: size_t xtramem_sz, dvoid **usrmempp));
788:
789: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
790: dvoid *attributep, ub4 *sizep, ub4 attrtype,
791: OCIError *errhp));
792:
793: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
794: ub4 size, ub4 attrtype, OCIError *errhp));
795:
796: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
797: ub4 position, dvoid *valuep, sb4 value_sz,
798: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
799: ub4 maxarr_len, ub4 *curelep, ub4 mode));
800:
801: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
802: OCICallbackInBind icbfp, dvoid *octxp,
803: OCICallbackOutBind ocbfp));
804:
805: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
806: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
807: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
808:
809: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
810: CONST ub4 type, CONST size_t xtramem_sz,
811: dvoid **usrmempp));
812:
813: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
814:
815:
816: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
817: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
818:
819: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
820: CONST size_t xtramem_sz, dvoid **usrmempp));
821:
822: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
823:
824: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
825: OCILobLocator *locp,
826: ub4 *lenp));
827:
828: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
829: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
830: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
831: CONST dvoid *bufp,
832: ub4 len,
833: ub1 piece),
834: ub2 csid, ub1 csfrm));
835:
836: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
837: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
838: ub1 piece, dvoid *ctxp,
839: sb4 (*cbfp)(dvoid *ctxp,
840: dvoid *bufp,
841: ub4 *len,
842: ub1 *piece),
843: ub2 csid, ub1 csfrm));
844:
845: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
846: dvoid **parmdpp, ub4 pos));
847:
848: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
849: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
850:
851: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
852:
853: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
854: ub4 credt, ub4 mode));
855:
856: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
857: ub4 mode));
858:
859: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
860: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
861: OCISnapshot *snap_out, ub4 mode));
862:
863: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
864: ub2 orientation, ub4 mode));
865:
866: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
867: ub4 stmt_len, ub4 language, ub4 mode));
868:
869: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
870:
871: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
872:
873: private: // conn client library funcs linking
874:
875: const char *dlink(const char *dlopen_file_spec) {
876: if(lt_dlinit())
877:
878: return lt_dlerror();
879:
880:
881:
882: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
883:
884: //return "hren31";
885:
886: if(!handle)
887: return lt_dlerror(); //"can not open the dynamic link module";
888:
889: #define DSLINK(name, action) \
890: name=(t_##name)lt_dlsym(handle, #name); \
891: if(!name) \
892: action;
893:
894: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
895:
896: OCI_LINK(Initialize);
897: OCI_LINK(EnvInit);
898: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
899: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
900: OCI_LINK(DefineByPos);
901: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
902: OCI_LINK(ErrorGet);
903: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
904: OCI_LINK(LobGetLength);
905: OCI_LINK(LobRead); OCI_LINK(LobWrite);
906: OCI_LINK(ParamGet);
907: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
908: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
909: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
910: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
911:
912: return 0;
913: }
914:
915: } *OracleSQL_driver;
916:
917: void check(
918: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
919: const char *step, sword status) {
920:
921: const char *msg;
922: char reason[MAX_STRING/2];
923:
924: switch (status) {
925: case OCI_SUCCESS:
926: return; // hurrah
927: case OCI_ERROR:
928: {
929: sb4 errcode;
930: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
931: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
932: msg=reason;
933: else
934: msg="[can not get error description]";
935: break;
936: }
937: case OCI_SUCCESS_WITH_INFO:
938: msg="SUCCESS_WITH_INFO"; break;
939: case OCI_NEED_DATA:
940: msg="NEED_DATA"; break;
941: case OCI_NO_DATA:
942: msg="NODATA"; break;
943: case OCI_INVALID_HANDLE:
944: msg="INVALID_HANDLE"; break;
945: case OCI_STILL_EXECUTING:
946: msg="STILL_EXECUTE"; break;
947: case OCI_CONTINUE:
948: msg="CONTINUE"; break;
949: default:
950: msg="unknown"; break;
951: }
952:
953: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
954: msg, step, (int)status);
955: longjmp(cs.mark, 1);
956: }
957:
958:
959: /* ----------------------------------------------------------------- */
960: /* Intbind callback that does not do any data input. */
961: /* ----------------------------------------------------------------- */
962: static sb4 cbf_no_data(
963: dvoid *ctxp,
964: OCIBind *bindp,
965: ub4 iter, ub4 index,
966: dvoid **bufpp,
967: ub4 *alenpp,
968: ub1 *piecep,
969: dvoid **indpp) {
970: *bufpp=(dvoid *)0;
971: *alenpp=0;
972: static sb2 null_ind=-1;
973: *indpp=(dvoid *) &null_ind;
974: *piecep=OCI_ONE_PIECE;
975:
976: return OCI_CONTINUE;
977: }
978:
979: /* ----------------------------------------------------------------- */
980: /* Outbind callback for returning data. */
981: /* ----------------------------------------------------------------- */
982: static sb4 cbf_get_data(dvoid *ctxp,
983: OCIBind *bindp,
984: ub4 iter, ub4 index,
985: dvoid **bufpp,
986: ub4 **alenp,
987: ub1 *piecep,
988: dvoid **indpp,
989: ub2 **rcodepp) {
990: OracleSQL_query_lobs::cbf_context_struct &context=
991: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
992:
993: if(index==0) {
994: static ub4 rows;
995: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
996: OracleSQL_driver->OCIAttrGet(
997: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
998: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
999: context.rows->count=(ub2)rows;
1000: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1001: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1002: }
1003:
1004: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1005:
1006: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1007: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1008: (ub4)OCI_DTYPE_LOB,
1009: 0, (dvoid **)0));
1010:
1011: *bufpp=var.locator;
1012: *alenp=&var.len;
1013: *indpp=(dvoid *) &var.ind;
1014: *piecep=OCI_ONE_PIECE;
1015: *rcodepp=&var.rcode;
1016:
1017: return OCI_CONTINUE;
1018: }
1019:
1020: void tolower(char *out, const char *in, size_t size) {
1021: while(size--)
1022: *out++=tolower(*in++);
1023: }
1024:
1025: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1026: //_asm int 3;
1027: return OracleSQL_driver=new OracleSQL_Driver();
1028: }