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1.1 parser 1: /** @file
2: Parser Oracle driver.
3:
1.29 paf 4: Copyright(c) 2001, 2003 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: */
1.41 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.40 2003/10/30 12:38:18 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:
1.33 paf 41: /// @todo small memory leaks here
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
1.33 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:
1.39 paf 107: static const char *options2env(char *options, bool* LowerCaseColumnNames) {
1.5 paf 108: while(options) {
109: if(char *key=lsplit(&options, '&')) {
110: if(*key) {
111: if(char *value=lsplit(key, '=')) {
1.39 paf 112: if( strcmp( key, "LowerCaseColumnNames" ) == 0 ) {
113: if( LowerCaseColumnNames )
114: *LowerCaseColumnNames = atoi(value)!=0;
115: continue;
116: }
117:
1.10 paf 118: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
119: if(do_append)
120: key[strlen(key)-1]=0; // remove trailing +
1.5 paf 121: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
122: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
123: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
1.10 paf 124: || do_append
1.5 paf 125: ) {
1.10 paf 126: if(pa_setenv(key, value, do_append)!=0)
1.5 paf 127: return "problem changing process environment" /*key*/;
128: } else
1.10 paf 129: return "unknown option (option must start with ORACLE_, ORA_ or NLS_)" /*key*/;
1.5 paf 130: } else
1.10 paf 131: return "option without =value" /*key*/;
1.5 paf 132: }
133: }
134: }
135: return 0;
136: }
137:
1.1 parser 138: #ifndef DOXYGEN
139: struct OracleSQL_connection_struct {
140: jmp_buf mark; char error[MAX_STRING];
1.27 paf 141: SQL_Error sql_error;
1.1 parser 142: OCIEnv *envhp;
143: OCIServer *srvhp;
144: OCIError *errhp;
145: OCISvcCtx *svchp;
146: OCISession *usrhp;
1.39 paf 147:
148: bool bLowerCaseColumnNames;
1.1 parser 149: };
150:
151: struct OracleSQL_query_lobs {
152: struct return_rows {
153: struct return_row {
154: OCILobLocator *locator; ub4 len;
155: int ind;
156: ub2 rcode;
157: } *row;
158: int count;
159: };
160: struct cbf_context_struct {
161: SQL_Driver_services *services;
162: OracleSQL_connection_struct *cs;
163: return_rows *rows;
164: };
165: struct Item {
166: const char *name_ptr; size_t name_size;
167: char *data_ptr; size_t data_size;
168: OCILobLocator *locator;
169: OCIBind *bind;
170: return_rows rows;
171: } items[MAX_IN_LOBS];
172: int count;
173: };
174: #endif
175:
176: // forwards
1.27 paf 177: void check(OracleSQL_connection_struct &cs, const char *step, sword status);
178: void check(OracleSQL_connection_struct &cs, bool error);
1.1 parser 179: static sb4 cbf_no_data(
180: dvoid *ctxp,
181: OCIBind *bindp,
182: ub4 iter, ub4 index,
183: dvoid **bufpp,
184: ub4 *alenpp,
185: ub1 *piecep,
186: dvoid **indpp);
187: static sb4 cbf_get_data(dvoid *ctxp,
188: OCIBind *bindp,
189: ub4 iter, ub4 index,
190: dvoid **bufpp,
191: ub4 **alenp,
192: ub1 *piecep,
193: dvoid **indpp,
194: ub2 **rcodepp);
1.38 paf 195: void tolower(char *out, const char *in, size_t size);
1.1 parser 196:
197: /**
198: OracleSQL server driver
199: */
200: class OracleSQL_Driver : public SQL_Driver {
201: public:
202:
203: OracleSQL_Driver() : SQL_Driver() {
204: }
205:
206: /// get api version
207: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 208: /** initialize driver by loading sql dynamic link library
209: @todo ?objects=1 which would turn on OCI_OBJECT init flag
210: */
1.5 paf 211: const char *initialize(char *dlopen_file_spec) {
212: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 213:
214: const char *error=dlopen_file_spec?
215: dlink(dlopen_file_spec):"client library column is empty";
216: if(!error) {
1.39 paf 217: error=options2env(options, 0);
1.1 parser 218:
1.5 paf 219: if(!error)
220: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
221: (dvoid * (*)(void *, unsigned int))0,
222: (dvoid * (*)(void*, void*, unsigned int))0,
223: (void (*)(void*, void*))0
224: );
1.1 parser 225: }
226:
227: return error;
228: }
229:
230: /** connect
231: @param used_only_in_connect_url
1.4 paf 232: format: @b user:pass@service?
233: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 234: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 235: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
236: ORA_ENCRYPT_LOGIN=TRUE
237:
238: @todo environment manupulation doesnt look thread safe
1.1 parser 239: */
240: void connect(
241: char *used_only_in_connect_url,
242: SQL_Driver_services& services,
243: void **connection ///< output: OracleSQL_connection_struct *
244: ) {
245: // connections are cross-request, do not use services._alloc [linked with request]
246: OracleSQL_connection_struct &cs=
247: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
1.39 paf 248: cs.bLowerCaseColumnNames = true;
1.1 parser 249:
250: char *user=used_only_in_connect_url;
251: char *service=lsplit(user, '@');
252: char *pwd=lsplit(user, ':');
1.4 paf 253: char *options=lsplit(service, '?');
1.1 parser 254:
255: if(!(user && pwd && service))
256: services._throw("mailformed connect part, must be 'user:pass@service'");
257:
1.39 paf 258: if(const char *error=options2env(options, &cs.bLowerCaseColumnNames))
1.5 paf 259: services._throw(error);
1.4 paf 260:
1.1 parser 261: if(setjmp(cs.mark))
262: services._throw(cs.error);
263:
264: // Allocate and initialize OCIError handle, attempt #1
265: /*
266: grabbed from sample
267: /server.804/a58234/oci_func.htm#446192
268: but doc
269: /server.804/a58234/oci_func.htm#446100
270: doesnt have this param listed as allowed
271: 8.1.6 client library barks as OCI_INVALID_HANDLE
272: and debugging revealed that OCI_HTYPE_ENV param value is invalid
273: later in doc
274: /server.804/a58234/oci_func.htm#446192
275: on OCIEnvInit thay say
276: "No changes are done to an already initialized handle"
277: think, this is some sort of backward compatibility wonder.
278: leaving as it is, and without check()
279: */
280: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
281: // Initialize an environment handle, attempt #2
1.27 paf 282: check(cs, "EnvInit", OCIEnvInit(
1.1 parser 283: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
284: // Allocate and initialize OCIError handle
1.27 paf 285: check(cs, "HandleAlloc errhp", OCIHandleAlloc(
1.1 parser 286: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
287: // Allocate and initialize OCIServer handle
1.27 paf 288: check(cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.1 parser 289: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
290: // Attach to a 'service'; initialize server context handle
1.27 paf 291: check(cs, "ServerAttach", OCIServerAttach(
1.1 parser 292: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
293: // Allocate and initialize OCISvcCtx handle
1.27 paf 294: check(cs, "HandleAlloc svchp", OCIHandleAlloc(
1.1 parser 295: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
296: // set attribute server context in the service context
1.27 paf 297: check(cs, "AttrSet server-service", OCIAttrSet(
1.1 parser 298: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
299: (dvoid *)cs.srvhp, (ub4)0,
300: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
301: // allocate a user context handle
1.27 paf 302: check(cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.1 parser 303: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
304: // set 'user' name
1.27 paf 305: check(cs, "AttrSet user-session", OCIAttrSet(
1.1 parser 306: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
307: (dvoid *)user, (ub4)strlen(user),
308: OCI_ATTR_USERNAME, cs.errhp));
309: // set 'pwd' password
1.27 paf 310: check(cs, "AttrSet pwd-session", OCIAttrSet(
1.1 parser 311: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
312: (dvoid *)pwd, (ub4)strlen(pwd),
313: OCI_ATTR_PASSWORD, cs.errhp));
314: // Authenticate a user
1.27 paf 315: check(cs, "SessionBegin", OCISessionBegin(
1.1 parser 316: cs.svchp, cs.errhp, cs.usrhp,
317: OCI_CRED_RDBMS, OCI_DEFAULT));
318: // remember connection in session
1.27 paf 319: check(cs, "AttrSet service-session", OCIAttrSet(
1.1 parser 320: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
321: (dvoid *)cs.usrhp, (ub4)0,
322: OCI_ATTR_SESSION, cs.errhp));
323:
324: // return created connection
325: *(OracleSQL_connection_struct **)connection=&cs;
326: }
327: void disconnect(void *connection) {
328: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
329: // Terminate a user session
330: OCISessionEnd(
331: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
332: // Detach from a server; uninitialize server context handle
333: OCIServerDetach(
334: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
335: // Free a previously allocated handles
336: /*
337: oci will free them up as belonging to env
338: OCIHandleFree(
339: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
340: OCIHandleFree(
341: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
342: OCIHandleFree(
343: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
344: */
345: OCIHandleFree(
346: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
347:
348: // connections are cross-request, do not use services._alloc [linked with request]
349: ::free(&cs);
350: }
351: void commit(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:
1.27 paf 356: check(cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
1.1 parser 357: }
358: void rollback(SQL_Driver_services& services, void *connection) {
359: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
360: if(setjmp(cs.mark))
361: services._throw(cs.error);
362:
1.27 paf 363: check(cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
1.1 parser 364: }
365:
366: bool ping(SQL_Driver_services&, void *connection) {
367: // maybe OCIServerVersion?
1.4 paf 368: // select 0 from dual
1.1 parser 369: return true;
370: }
371:
1.32 paf 372: const char* quote(
373: SQL_Driver_services& services, void *connection,
374: const char *from, unsigned int length) {
375: char *result=(char*)services.malloc_atomic(length*2+1);
376: char *to=result;
377: while(length--) {
378: switch(*from) {
379: case '\'': // "'" -> "''"
1.35 paf 380: *to++='\'';
1.32 paf 381: break;
1.1 parser 382: }
1.32 paf 383: *to++=*from++;
384: }
385: *to=0;
386: return result;
1.1 parser 387: }
388: void query(
389: SQL_Driver_services& services, void *connection,
390: const char *astatement, unsigned long offset, unsigned long limit,
391: SQL_Driver_query_event_handlers& handlers) {
392:
393: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
394: OracleSQL_query_lobs lobs={{0}, 0};
395: OCIStmt *stmthp=0;
396:
397: bool failed=false;
398: if(setjmp(cs.mark)) {
399: failed=true;
400: goto cleanup;
401: } else {
402: const char *statement=preprocess_statement(services, cs,
403: astatement, lobs);
404:
1.27 paf 405: check(cs, "HandleAlloc STMT", OCIHandleAlloc(
1.1 parser 406: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.27 paf 407: check(cs, "syntax",
1.1 parser 408: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
409: (ub4)strlen((char *)statement),
410: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
411: {
412: for(int i=0; i<lobs.count; i++) {
1.27 paf 413: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.1 parser 414: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
415:
1.27 paf 416: check(cs, "bind output", OCIBindByPos(stmthp,
1.1 parser 417: &lobs.items[i].bind, cs.errhp,
418: (ub4)1+i,
419: (dvoid *)&lobs.items[i].locator,
420: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
421: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
422:
423: lobs.items[i].rows.count=0;
1.32 paf 424: OracleSQL_query_lobs::cbf_context_struct cbf_context={
425: &services, &cs, &lobs.items[i].rows};
1.27 paf 426: check(cs, "bind dynamic", OCIBindDynamic(
1.1 parser 427: lobs.items[i].bind, cs.errhp,
428: (dvoid *) &cbf_context, cbf_no_data,
429: (dvoid *) &cbf_context, cbf_get_data));
430: }
431: }
432:
1.26 paf 433: execute_prepared(services, cs,
434: statement, stmthp, lobs,
435: offset, limit, handlers);
1.1 parser 436: }
437: cleanup: // no check call after this point!
438: {
439: for(int i=0; i<lobs.count; i++) {
440: /* free var locator */
441: if(OCILobLocator *locator=lobs.items[i].locator)
442: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
443:
444: /* free rows descriptors */
445: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
446: for(int r=0; r<rows.count; r++)
447: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
448: }
449: }
450: if(stmthp)
451: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
452:
1.26 paf 453: if(failed) {
1.27 paf 454: if(cs.sql_error.defined())
455: services._throw(cs.sql_error);
1.1 parser 456: services._throw(cs.error);
1.26 paf 457: }
1.1 parser 458: }
459:
460: private: // private funcs
461:
462: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
463: const char *astatement, OracleSQL_query_lobs &lobs) {
464: size_t statement_size=strlen(astatement);
465:
1.32 paf 466: char *result=(char *)services.malloc_atomic(statement_size
1.1 parser 467: +MAX_STRING // in case of short 'strings'
468: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
469: +1);
470: const char *o=astatement;
471:
472: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
473: char *n=result;
474: while(*o) {
475: if(
476: o[0]=='/' &&
477: o[1]=='*' &&
478: o[2]=='*') { // name start
1.34 paf 479: const char* saved_o=o;
1.1 parser 480: o+=3;
481: const char *name_begin=o;
482: while(*o)
483: if(
484: o[0]=='*' &&
485: o[1]=='*' &&
486: o[2]=='/' &&
487: o[3]=='\'') { // name end
1.34 paf 488: saved_o=0; // found, marking that
1.1 parser 489: const char *name_end=o;
490: o+=4;
491: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
492: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
1.32 paf 493: item.data_ptr=(char *)services.malloc_atomic(statement_size/*max*/); item.data_size=0;
1.1 parser 494:
495: const char *start=o;
496: bool escaped=false;
497: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 498: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 499: if(escaped) {
500: // write pending, skip "\" or "'"
501: if(size_t size=o-start) {
502: memcpy(item.data_ptr+item.data_size, start, size);
503: item.data_size+=size;
504: }
505: start=++o;
506: } else
507: o++;
508: }
509: if(size_t size=o-start) {
510: memcpy(item.data_ptr+item.data_size, start, size);
511: item.data_size+=size;
512: }
513: if(*o)
514: o++; // skip "'"
515:
516: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
517: break;
518: } else
519: o++; // /**skip**/'xxx'
1.34 paf 520: if(saved_o) {
521: o=saved_o;
522: *n++=*o++;
523: }
1.1 parser 524: } else
525: *n++=*o++;
526: }
527: *n=0;
528:
529: if(lobs.count) {
530: int i;
531: n+=sprintf(n, " returning ");
532: for(i=0; i<lobs.count; i++) {
533: if(i)
534: *n++=',';
535: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
536: }
537: n+=sprintf(n, " into ");
538: for(i=0; i<lobs.count; i++) {
539: if(i)
1.41 ! paf 540: *n++=',';
1.1 parser 541: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
542: }
543: }
544:
545: return result;
546: }
547:
548: void execute_prepared(
549: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
550: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
551: unsigned long offset, unsigned long limit,
552: SQL_Driver_query_event_handlers& handlers) {
553:
554: ub2 stmt_type=0; // UNKNOWN
555: /*
556: //gpfs on sun. paf 000818
557: //Zanyway, this is needed before.
1.27 paf 558: check(cs, "get stmt type", OCIAttrGet(
1.1 parser 559: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
560: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
561: */
1.16 paf 562:
1.17 paf 563: while(isspace(*statement))
1.16 paf 564: statement++;
1.1 parser 565: if(strncasecmp(statement, "select", 6)==0)
566: stmt_type=OCI_STMT_SELECT;
567: else if(strncasecmp(statement, "insert", 6)==0)
568: stmt_type=OCI_STMT_INSERT;
569: else if(strncasecmp(statement, "update", 6)==0)
570: stmt_type=OCI_STMT_UPDATE;
571:
572: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
573: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
574: (OCISnapshot *)NULL,
575: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
576:
577: if(status!=OCI_NO_DATA)
1.27 paf 578: check(cs, "execute", status);
1.1 parser 579:
580: {
581: for(int i=0; i<lobs.count; i++)
582: if(ub4 bytes_to_write=lobs.items[i].data_size) {
583: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
584: for(int r=0; r<rows->count; r++) {
585: OCILobLocator *locator=rows->row[r].locator;
1.27 paf 586: check(cs, "lobwrite", OCILobWrite (
1.1 parser 587: cs.svchp, cs.errhp,
588: locator, &bytes_to_write, 1,
589: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
590: (dvoid *)0, 0, (ub2)0,
591: (ub1) SQLCS_IMPLICIT));
592: }
593: }
594: }
595:
596: switch(stmt_type) {
597: case OCI_STMT_SELECT:
598: fetch_table(services, cs,
599: stmthp, offset, limit,
600: handlers);
601: break;
602: default:
603: /*
604: case OCI_STMT_INSERT:
605: case OCI_STMT_UPDATE:
606: */
607: break;
608: }
609: }
610:
611: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
612: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
613: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 614:
1.10 paf 615: ub4 prefetch_rows=100;
1.27 paf 616: check(cs, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 617: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
618: (dvoid *)&prefetch_rows, (ub4)0,
619: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
620:
1.20 paf 621: ub4 prefetch_mem_size=100*0x400;
1.27 paf 622: check(cs, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 623: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
624: (dvoid *)&prefetch_mem_size, (ub4)0,
625: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 626:
627: OCIParam *mypard;
628: ub2 dtype;
629: text *col_name;
630:
1.40 paf 631: struct Col {
1.1 parser 632: ub2 type;
633: char *str;
634: OCILobLocator *var;
635: OCIDefine *def;
636: sb2 indicator;
637: } cols[MAX_COLS]={0};
638: int column_count=0;
639:
640: bool failed=false;
641: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
642: if(setjmp(cs.mark)) {
643: failed=true;
644: goto cleanup;
645: } else {
1.27 paf 646: // idea of preincrementing is that at error time all handles would free up
647: while(++column_count<=MAX_COLS) {
648: /* get next descriptor, if there is one */
649: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
650: (ub4) column_count)!=OCI_SUCCESS) {
651: --column_count;
652: break;
653: }
654:
655: /* Retrieve the data type attribute */
656: check(cs, "get type", OCIAttrGet(
657: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
658: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
659: (OCIError *)cs.errhp));
660:
661: /* Retrieve the column name attribute */
662: ub4 col_name_len;
663: check(cs, "get name", OCIAttrGet(
664: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
665: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
666: (OCIError *)cs.errhp));
667:
1.40 paf 668: Col& col=cols[column_count-1];
1.27 paf 669: {
1.38 paf 670: size_t length=(size_t)col_name_len;
671: char *ptr=(char *)services.malloc_atomic(length+1);
1.39 paf 672: if( cs.bLowerCaseColumnNames )
673: tolower(ptr, (char *)col_name, length);
674: else
675: memcpy(ptr, col_name, length);
1.38 paf 676: ptr[length]=0;
677: check(cs, handlers.add_column(cs.sql_error, ptr, length));
1.27 paf 678: }
679:
680: ub2 coerce_type=dtype;
681: sb4 size=0;
682: void *ptr;
683:
684: switch(dtype) {
685: case SQLT_CLOB:
1.1 parser 686: {
1.27 paf 687: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.40 paf 688: (dvoid *)cs.envhp, (dvoid **)(ptr=&col.var),
1.27 paf 689: (ub4)OCI_DTYPE_LOB,
690: 0, (dvoid **)0));
691:
692: size=0;
1.1 parser 693: break;
694: }
1.27 paf 695: default:
696: coerce_type=SQLT_STR;
1.40 paf 697: ptr=col.str=(char *)services.malloc_atomic(MAX_OUT_STRING_LENGTH+1);
1.27 paf 698: size=MAX_OUT_STRING_LENGTH;
699: break;
1.1 parser 700: }
701:
1.40 paf 702: col.type=coerce_type;
1.1 parser 703:
1.40 paf 704: col.def=0; check(cs, "DefineByPos", OCIDefineByPos(
705: stmthp, &col.def, cs.errhp,
1.27 paf 706: column_count, (ub1 *) ptr, size,
1.40 paf 707: coerce_type, (dvoid *) &col.indicator,
1.27 paf 708: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
709: }
710:
711: check(cs, handlers.before_rows(cs.sql_error));
712:
713: for(unsigned long row=0; !limit||row<offset+limit; row++) {
714: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
715: (ub4)OCI_DEFAULT);
716: if(status==OCI_NO_DATA)
717: break;
718: check(cs, "fetch", status);
1.3 paf 719:
1.27 paf 720: if(row>=offset) {
721: check(cs, handlers.add_row(cs.sql_error));
722: for(int i=0; i<column_count; i++) {
1.37 paf 723: size_t length=0;
1.32 paf 724: char* str=0;
1.27 paf 725: if(!cols[i].indicator) // not NULL
726: switch(cols[i].type) {
727: case SQLT_CLOB:
728: {
729: ub4 amtp=4096000000UL;
730: ub4 offset=1;
731: ub4 loblen=0;
732: OCILobLocator *var=(OCILobLocator *)cols[i].var;
733: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
734: if(loblen) {
1.37 paf 735: length=(size_t)loblen;
736: str=(char*)services.malloc_atomic(length+1);
1.27 paf 737: check(cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
1.32 paf 738: var, &amtp, offset, (dvoid *) str,
1.27 paf 739: loblen, (dvoid *)0,
740: 0,
741: (ub2)0, (ub1) SQLCS_IMPLICIT));
1.37 paf 742: str[length]=0;
1.1 parser 743: }
744: break;
745: }
1.27 paf 746: default:
1.32 paf 747: if(const char *value=cols[i].str) {
1.37 paf 748: length=strlen(value);
749: str=(char*)services.malloc_atomic(length+1);
750: memcpy(str, value, length+1);
1.27 paf 751: } else {
1.37 paf 752: length=0;
1.32 paf 753: str=0;
1.27 paf 754: }
755: break;
756: }
1.37 paf 757: check(cs, handlers.add_row_cell(cs.sql_error, str, length));
1.1 parser 758: }
759: }
760: }
761: }
762:
763: cleanup: // no check call after this point!
764: for(int i=0; i<column_count; i++) {
765: switch(cols[i].type) {
766: case SQLT_CLOB:
767: /* free var locator */
768: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
769: break;
770: default:
771: break;
772: }
773: }
774:
775: if(failed) // need rethrow?
776: longjmp(saved_mark, 1);
777: }
778:
779: private: // conn client library funcs
780:
1.27 paf 781: friend void check(OracleSQL_connection_struct &cs, const char *step, sword status);
1.1 parser 782: friend sb4 cbf_get_data(dvoid *ctxp,
783: OCIBind *bindp,
784: ub4 iter, ub4 index,
785: dvoid **bufpp,
786: ub4 **alenp,
787: ub1 *piecep,
788: dvoid **indpp,
789: ub2 **rcodepp);
790:
791:
792: #define OCI_DECL(name, params) \
793: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
794:
795: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
796: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
797: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
798: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
799:
800: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
801: size_t xtramem_sz, dvoid **usrmempp));
802:
803: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
804: dvoid *attributep, ub4 *sizep, ub4 attrtype,
805: OCIError *errhp));
806:
807: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
808: ub4 size, ub4 attrtype, OCIError *errhp));
809:
810: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
811: ub4 position, dvoid *valuep, sb4 value_sz,
812: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
813: ub4 maxarr_len, ub4 *curelep, ub4 mode));
814:
815: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
816: OCICallbackInBind icbfp, dvoid *octxp,
817: OCICallbackOutBind ocbfp));
818:
819: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
820: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
821: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
822:
823: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
824: CONST ub4 type, CONST size_t xtramem_sz,
825: dvoid **usrmempp));
826:
827: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
828:
829:
830: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
831: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
832:
833: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
834: CONST size_t xtramem_sz, dvoid **usrmempp));
835:
836: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
837:
838: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
839: OCILobLocator *locp,
840: ub4 *lenp));
841:
842: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
843: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
844: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
845: CONST dvoid *bufp,
846: ub4 len,
847: ub1 piece),
848: ub2 csid, ub1 csfrm));
849:
850: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
851: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
852: ub1 piece, dvoid *ctxp,
853: sb4 (*cbfp)(dvoid *ctxp,
854: dvoid *bufp,
855: ub4 *len,
856: ub1 *piece),
857: ub2 csid, ub1 csfrm));
858:
859: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
860: dvoid **parmdpp, ub4 pos));
861:
862: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
863: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
864:
865: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
866:
867: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
868: ub4 credt, ub4 mode));
869:
870: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
871: ub4 mode));
872:
873: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
874: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
875: OCISnapshot *snap_out, ub4 mode));
876:
877: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
878: ub2 orientation, ub4 mode));
879:
880: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
881: ub4 stmt_len, ub4 language, ub4 mode));
882:
883: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
884:
885: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
886:
887: private: // conn client library funcs linking
888:
889: const char *dlink(const char *dlopen_file_spec) {
890: if(lt_dlinit())
891: return lt_dlerror();
892: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
893: if(!handle)
894: return lt_dlerror(); //"can not open the dynamic link module";
895:
896: #define DSLINK(name, action) \
897: name=(t_##name)lt_dlsym(handle, #name); \
898: if(!name) \
899: action;
900:
901: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
902:
903: OCI_LINK(Initialize);
904: OCI_LINK(EnvInit);
905: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
906: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
907: OCI_LINK(DefineByPos);
908: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
909: OCI_LINK(ErrorGet);
910: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
911: OCI_LINK(LobGetLength);
912: OCI_LINK(LobRead); OCI_LINK(LobWrite);
913: OCI_LINK(ParamGet);
914: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
915: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
916: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
917: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
918:
919: return 0;
920: }
921:
922: } *OracleSQL_driver;
923:
1.27 paf 924: void check(OracleSQL_connection_struct &cs, const char *step, sword status) {
1.1 parser 925:
926: const char *msg;
927: char reason[MAX_STRING/2];
928:
1.21 paf 929: const char *prefix="ERROR";
1.1 parser 930: switch (status) {
1.22 paf 931: case OCI_SUCCESS: // hurrah
932: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
933: // count() not counting them and gives that status
934: return;
1.1 parser 935: case OCI_ERROR:
936: {
937: sb4 errcode;
938: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
939: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
940: msg=reason;
941: else
942: msg="[can not get error description]";
943: break;
944: }
945: case OCI_NEED_DATA:
946: msg="NEED_DATA"; break;
947: case OCI_NO_DATA:
948: msg="NODATA"; break;
949: case OCI_INVALID_HANDLE:
950: msg="INVALID_HANDLE"; break;
951: case OCI_STILL_EXECUTING:
952: msg="STILL_EXECUTE"; break;
953: case OCI_CONTINUE:
954: msg="CONTINUE"; break;
955: default:
956: msg="unknown"; break;
957: }
958:
1.22 paf 959: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
960: msg, step, (int)status);
1.1 parser 961: longjmp(cs.mark, 1);
962: }
963:
1.27 paf 964: void check(OracleSQL_connection_struct &cs, bool error) {
965: if(error)
966: longjmp(cs.mark, 1);
967: }
1.1 parser 968:
969: /* ----------------------------------------------------------------- */
970: /* Intbind callback that does not do any data input. */
971: /* ----------------------------------------------------------------- */
972: static sb4 cbf_no_data(
973: dvoid *ctxp,
974: OCIBind *bindp,
975: ub4 iter, ub4 index,
976: dvoid **bufpp,
977: ub4 *alenpp,
978: ub1 *piecep,
979: dvoid **indpp) {
980: *bufpp=(dvoid *)0;
981: *alenpp=0;
982: static sb2 null_ind=-1;
983: *indpp=(dvoid *) &null_ind;
984: *piecep=OCI_ONE_PIECE;
985:
986: return OCI_CONTINUE;
987: }
988:
989: /* ----------------------------------------------------------------- */
990: /* Outbind callback for returning data. */
991: /* ----------------------------------------------------------------- */
992: static sb4 cbf_get_data(dvoid *ctxp,
993: OCIBind *bindp,
994: ub4 iter, ub4 index,
995: dvoid **bufpp,
996: ub4 **alenp,
997: ub1 *piecep,
998: dvoid **indpp,
999: ub2 **rcodepp) {
1000: OracleSQL_query_lobs::cbf_context_struct &context=
1001: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
1002:
1003: if(index==0) {
1004: static ub4 rows;
1.27 paf 1005: check(*context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 1006: OracleSQL_driver->OCIAttrGet(
1007: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
1008: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1009: context.rows->count=(ub2)rows;
1010: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1.32 paf 1011: context.services->malloc_atomic(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1.1 parser 1012: }
1013:
1014: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1015:
1.27 paf 1016: check(*context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 1017: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1018: (ub4)OCI_DTYPE_LOB,
1019: 0, (dvoid **)0));
1020:
1021: *bufpp=var.locator;
1022: *alenp=&var.len;
1023: *indpp=(dvoid *) &var.ind;
1024: *piecep=OCI_ONE_PIECE;
1025: *rcodepp=&var.rcode;
1026:
1027: return OCI_CONTINUE;
1028: }
1029:
1.38 paf 1030: void tolower(char *out, const char *in, size_t size) {
1031: while(size--)
1032: *out++=tolower(*in++);
1.1 parser 1033: }
1034:
1035: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1036: return OracleSQL_driver=new OracleSQL_Driver();
1037: }