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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: */
1.24 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.23 2002/10/31 10:14:11 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;
390: if(setjmp(cs.mark)) {
391: failed=true;
392: goto cleanup;
393: } else {
394: const char *statement=preprocess_statement(services, cs,
395: astatement, lobs);
396:
397: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
398: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
399: check(services, cs, "syntax",
400: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
401: (ub4)strlen((char *)statement),
402: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
403: {
404: for(int i=0; i<lobs.count; i++) {
405: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
406: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
407:
408: check(services, cs, "bind output", OCIBindByPos(stmthp,
409: &lobs.items[i].bind, cs.errhp,
410: (ub4)1+i,
411: (dvoid *)&lobs.items[i].locator,
412: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
413: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
414:
415: lobs.items[i].rows.count=0;
416: OracleSQL_query_lobs::cbf_context_struct cbf_context={
417: &services, &cs, &lobs.items[i].rows};
418: check(services, cs, "bind dynamic", OCIBindDynamic(
419: lobs.items[i].bind, cs.errhp,
420: (dvoid *) &cbf_context, cbf_no_data,
421: (dvoid *) &cbf_context, cbf_get_data));
422: }
423: }
424:
425: execute_prepared(services, cs,
426: statement, stmthp, lobs,
427: offset, limit, handlers);
428: }
429: cleanup: // no check call after this point!
430: {
431: for(int i=0; i<lobs.count; i++) {
432: /* free var locator */
433: if(OCILobLocator *locator=lobs.items[i].locator)
434: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
435:
436: /* free rows descriptors */
437: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
438: for(int r=0; r<rows.count; r++)
439: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
440: }
441: }
442: if(stmthp)
443: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
444:
445: if(failed)
446: services._throw(cs.error);
447: }
448:
449: private: // private funcs
450:
451: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
452: const char *astatement, OracleSQL_query_lobs &lobs) {
453: size_t statement_size=strlen(astatement);
454:
455: char *result=(char *)services.malloc(statement_size
456: +MAX_STRING // in case of short 'strings'
457: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
458: +1);
459: const char *o=astatement;
460:
461: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
462: char *n=result;
463: while(*o) {
464: if(
465: o[0]=='/' &&
466: o[1]=='*' &&
467: o[2]=='*') { // name start
468: o+=3;
469: const char *name_begin=o;
470: while(*o)
471: if(
472: o[0]=='*' &&
473: o[1]=='*' &&
474: o[2]=='/' &&
475: o[3]=='\'') { // name end
476: const char *name_end=o;
477: o+=4;
478: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
479: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
480: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
481:
482: const char *start=o;
483: bool escaped=false;
484: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 485: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 486: if(escaped) {
487: // write pending, skip "\" or "'"
488: if(size_t size=o-start) {
489: memcpy(item.data_ptr+item.data_size, start, size);
490: item.data_size+=size;
491: }
492: start=++o;
493: } else
494: o++;
495: }
496: if(size_t size=o-start) {
497: memcpy(item.data_ptr+item.data_size, start, size);
498: item.data_size+=size;
499: }
500: if(*o)
501: o++; // skip "'"
502:
503: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
504: break;
505: } else
506: o++; // /**skip**/'xxx'
507: } else
508: *n++=*o++;
509: }
510: *n=0;
511:
512: if(lobs.count) {
513: int i;
514: n+=sprintf(n, " returning ");
515: for(i=0; i<lobs.count; i++) {
516: if(i)
517: *n++=',';
518: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
519: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
520: n+=lobs.items[i].name_size;*/
521: }
522: n+=sprintf(n, " into ");
523: for(i=0; i<lobs.count; i++) {
524: if(i)
525: *n++='x';
526: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
527: /**n++=':';
528: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
529: n+=lobs.items[i].name_size;*/
530: }
531: }
532:
533: return result;
534: }
535:
536: void execute_prepared(
537: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
538: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
539: unsigned long offset, unsigned long limit,
540: SQL_Driver_query_event_handlers& handlers) {
541:
542: ub2 stmt_type=0; // UNKNOWN
543: /*
544: //gpfs on sun. paf 000818
545: //Zanyway, this is needed before.
546: check(services, cs, "get stmt type", OCIAttrGet(
547: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
548: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
549: */
1.16 paf 550:
1.17 paf 551: while(isspace(*statement))
1.16 paf 552: statement++;
1.1 parser 553: if(strncasecmp(statement, "select", 6)==0)
554: stmt_type=OCI_STMT_SELECT;
555: else if(strncasecmp(statement, "insert", 6)==0)
556: stmt_type=OCI_STMT_INSERT;
557: else if(strncasecmp(statement, "update", 6)==0)
558: stmt_type=OCI_STMT_UPDATE;
559:
560: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
561: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
562: (OCISnapshot *)NULL,
563: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
564:
565: if(status!=OCI_NO_DATA)
566: check(services, cs, "execute", status);
567:
568: {
569: for(int i=0; i<lobs.count; i++)
570: if(ub4 bytes_to_write=lobs.items[i].data_size) {
571: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
572: for(int r=0; r<rows->count; r++) {
573: OCILobLocator *locator=rows->row[r].locator;
574: check(services, cs, "lobwrite", OCILobWrite (
575: cs.svchp, cs.errhp,
576: locator, &bytes_to_write, 1,
577: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
578: (dvoid *)0, 0, (ub2)0,
579: (ub1) SQLCS_IMPLICIT));
580: }
581: }
582: }
583:
584: switch(stmt_type) {
585: case OCI_STMT_SELECT:
586: fetch_table(services, cs,
587: stmthp, offset, limit,
588: handlers);
589: break;
590: default:
591: /*
592: case OCI_STMT_INSERT:
593: case OCI_STMT_UPDATE:
594: */
595: break;
596: }
597: }
598:
599: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
600: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
601: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 602:
1.10 paf 603: ub4 prefetch_rows=100;
1.9 paf 604: check(services, cs, "AttrSet prefetch-rows", OCIAttrSet(
605: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
606: (dvoid *)&prefetch_rows, (ub4)0,
607: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
608:
1.20 paf 609: ub4 prefetch_mem_size=100*0x400;
1.9 paf 610: check(services, cs, "AttrSet prefetch-memory", OCIAttrSet(
611: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
612: (dvoid *)&prefetch_mem_size, (ub4)0,
613: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 614:
615: OCIParam *mypard;
616: ub2 dtype;
617: text *col_name;
618:
619: struct {
620: ub2 type;
621: char *str;
622: OCILobLocator *var;
623: OCIDefine *def;
624: sb2 indicator;
625: } cols[MAX_COLS]={0};
626: int column_count=0;
627:
628: bool failed=false;
629: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
630: if(setjmp(cs.mark)) {
631: failed=true;
632: goto cleanup;
633: } else {
634: // idea of preincrementing is that at error time all handles would free up
635: while(++column_count<=MAX_COLS) {
636: /* get next descriptor, if there is one */
637: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
1.3 paf 638: (ub4) column_count)!=OCI_SUCCESS) {
639: --column_count;
1.1 parser 640: break;
1.3 paf 641: }
1.1 parser 642:
643: /* Retrieve the data type attribute */
644: check(services, cs, "get type", OCIAttrGet(
645: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
646: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
647: (OCIError *)cs.errhp));
648:
649: /* Retrieve the column name attribute */
650: ub4 col_name_len;
651: check(services, cs, "get name", OCIAttrGet(
652: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
653: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
654: (OCIError *)cs.errhp));
655:
656: {
657: size_t size=(size_t)col_name_len;
658: char *ptr=(char *)services.malloc(size);
659: tolower(ptr, (char *)col_name, size);
660: handlers.add_column(ptr, size);
661: }
662:
663: ub2 coerce_type=dtype;
664: sb4 size=0;
665: void *ptr;
666:
667: switch(dtype) {
668: case SQLT_CLOB:
669: {
670: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
671: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
672: (ub4)OCI_DTYPE_LOB,
673: 0, (dvoid **)0));
674:
675: size=0;
676: break;
677: }
678: default:
679: coerce_type=SQLT_STR;
680: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
681: size=MAX_OUT_STRING_LENGTH;
682: break;
683: }
684:
685: cols[column_count-1].type=coerce_type;
686:
687: check(services, cs, "DefineByPos", OCIDefineByPos(
688: stmthp, &cols[column_count-1].def, cs.errhp,
689: column_count, (ub1 *) ptr, size,
690: coerce_type, (dvoid *) &cols[column_count-1].indicator,
691: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
692: }
693:
694: handlers.before_rows();
695:
1.20 paf 696: for(unsigned long row=0; !limit||row<offset+limit; row++) {
1.1 parser 697: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
698: (ub4)OCI_DEFAULT);
1.3 paf 699: if(status==OCI_NO_DATA)
1.1 parser 700: break;
1.3 paf 701: check(services, cs, "fetch", status);
702:
1.1 parser 703: if(row>=offset) {
704: handlers.add_row();
705: for(int i=0; i<column_count; i++) {
1.7 paf 706: size_t size=0;
707: void *ptr=0;
1.8 paf 708: if(!cols[i].indicator) // not NULL
1.1 parser 709: switch(cols[i].type) {
710: case SQLT_CLOB:
711: {
712: ub4 amtp=4096000000UL;
713: ub4 offset=1;
714: ub4 loblen=0;
715: OCILobLocator *var=(OCILobLocator *)cols[i].var;
716: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
717: if(loblen) {
718: size=(size_t)loblen;
719: ptr=services.malloc(size);
720: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
721: var, &amtp, offset, (dvoid *) ptr,
722: loblen, (dvoid *)0,
723: 0,
724: (ub2)0, (ub1) SQLCS_IMPLICIT));
725: }
726: break;
727: }
728: default:
729: if(const char *str=cols[i].str) {
730: size=strlen(str);
731: ptr=services.malloc(size);
732: memcpy(ptr, str, size);
733: } else {
734: size=0;
735: ptr=0;
736: }
737: break;
1.7 paf 738: }
1.1 parser 739: handlers.add_row_cell(ptr, size);
740: }
741: }
742: }
743: }
744:
745: cleanup: // no check call after this point!
746: for(int i=0; i<column_count; i++) {
747: switch(cols[i].type) {
748: case SQLT_CLOB:
749: /* free var locator */
750: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
751: break;
752: default:
753: break;
754: }
755: }
756:
757: if(failed) // need rethrow?
758: longjmp(saved_mark, 1);
759: }
760:
761: private: // conn client library funcs
762:
763: friend void check(
764: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
765: const char *step, sword status);
766: friend sb4 cbf_get_data(dvoid *ctxp,
767: OCIBind *bindp,
768: ub4 iter, ub4 index,
769: dvoid **bufpp,
770: ub4 **alenp,
771: ub1 *piecep,
772: dvoid **indpp,
773: ub2 **rcodepp);
774:
775:
776: #define OCI_DECL(name, params) \
777: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
778:
779: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
780: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
781: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
782: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
783:
784: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
785: size_t xtramem_sz, dvoid **usrmempp));
786:
787: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
788: dvoid *attributep, ub4 *sizep, ub4 attrtype,
789: OCIError *errhp));
790:
791: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
792: ub4 size, ub4 attrtype, OCIError *errhp));
793:
794: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
795: ub4 position, dvoid *valuep, sb4 value_sz,
796: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
797: ub4 maxarr_len, ub4 *curelep, ub4 mode));
798:
799: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
800: OCICallbackInBind icbfp, dvoid *octxp,
801: OCICallbackOutBind ocbfp));
802:
803: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
804: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
805: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
806:
807: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
808: CONST ub4 type, CONST size_t xtramem_sz,
809: dvoid **usrmempp));
810:
811: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
812:
813:
814: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
815: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
816:
817: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
818: CONST size_t xtramem_sz, dvoid **usrmempp));
819:
820: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
821:
822: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
823: OCILobLocator *locp,
824: ub4 *lenp));
825:
826: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
827: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
828: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
829: CONST dvoid *bufp,
830: ub4 len,
831: ub1 piece),
832: ub2 csid, ub1 csfrm));
833:
834: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
835: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
836: ub1 piece, dvoid *ctxp,
837: sb4 (*cbfp)(dvoid *ctxp,
838: dvoid *bufp,
839: ub4 *len,
840: ub1 *piece),
841: ub2 csid, ub1 csfrm));
842:
843: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
844: dvoid **parmdpp, ub4 pos));
845:
846: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
847: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
848:
849: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
850:
851: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
852: ub4 credt, ub4 mode));
853:
854: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
855: ub4 mode));
856:
857: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
858: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
859: OCISnapshot *snap_out, ub4 mode));
860:
861: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
862: ub2 orientation, ub4 mode));
863:
864: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
865: ub4 stmt_len, ub4 language, ub4 mode));
866:
867: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
868:
869: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
870:
871: private: // conn client library funcs linking
872:
873: const char *dlink(const char *dlopen_file_spec) {
874: if(lt_dlinit())
875:
876: return lt_dlerror();
877:
878:
879:
880: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
881:
882: //return "hren31";
883:
884: if(!handle)
885: return lt_dlerror(); //"can not open the dynamic link module";
886:
887: #define DSLINK(name, action) \
888: name=(t_##name)lt_dlsym(handle, #name); \
889: if(!name) \
890: action;
891:
892: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
893:
894: OCI_LINK(Initialize);
895: OCI_LINK(EnvInit);
896: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
897: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
898: OCI_LINK(DefineByPos);
899: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
900: OCI_LINK(ErrorGet);
901: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
902: OCI_LINK(LobGetLength);
903: OCI_LINK(LobRead); OCI_LINK(LobWrite);
904: OCI_LINK(ParamGet);
905: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
906: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
907: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
908: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
909:
910: return 0;
911: }
912:
913: } *OracleSQL_driver;
914:
915: void check(
916: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
917: const char *step, sword status) {
918:
919: const char *msg;
920: char reason[MAX_STRING/2];
921:
1.21 paf 922: const char *prefix="ERROR";
1.1 parser 923: switch (status) {
1.22 paf 924: case OCI_SUCCESS: // hurrah
925: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
926: // count() not counting them and gives that status
927: return;
1.1 parser 928: case OCI_ERROR:
929: {
930: sb4 errcode;
931: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
932: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
933: msg=reason;
934: else
935: msg="[can not get error description]";
936: break;
937: }
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:
1.22 paf 952: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
953: msg, step, (int)status);
1.1 parser 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: }