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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: */
1.31 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.30 2003/06/17 13:05:34 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];
1.27 paf 135: SQL_Error sql_error;
1.1 parser 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;
1.31 ! paf 163: cbf_context_struct cbf_context;
1.1 parser 164: } items[MAX_IN_LOBS];
165: int count;
166: };
167: #endif
168:
169: // forwards
1.27 paf 170: void check(OracleSQL_connection_struct &cs, const char *step, sword status);
171: void check(OracleSQL_connection_struct &cs, bool error);
1.1 parser 172: static sb4 cbf_no_data(
173: dvoid *ctxp,
174: OCIBind *bindp,
175: ub4 iter, ub4 index,
176: dvoid **bufpp,
177: ub4 *alenpp,
178: ub1 *piecep,
179: dvoid **indpp);
180: static sb4 cbf_get_data(dvoid *ctxp,
181: OCIBind *bindp,
182: ub4 iter, ub4 index,
183: dvoid **bufpp,
184: ub4 **alenp,
185: ub1 *piecep,
186: dvoid **indpp,
187: ub2 **rcodepp);
188: void tolower(char *out, const char *in, size_t size);
189:
190: /**
191: OracleSQL server driver
192: */
193: class OracleSQL_Driver : public SQL_Driver {
194: public:
195:
196: OracleSQL_Driver() : SQL_Driver() {
197: }
198:
199: /// get api version
200: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 201: /** initialize driver by loading sql dynamic link library
202: @todo ?objects=1 which would turn on OCI_OBJECT init flag
203: */
1.5 paf 204: const char *initialize(char *dlopen_file_spec) {
205: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 206:
207: const char *error=dlopen_file_spec?
208: dlink(dlopen_file_spec):"client library column is empty";
209: if(!error) {
1.10 paf 210: error=options2env(options);
1.1 parser 211:
1.5 paf 212: if(!error)
213: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
214: (dvoid * (*)(void *, unsigned int))0,
215: (dvoid * (*)(void*, void*, unsigned int))0,
216: (void (*)(void*, void*))0
217: );
1.1 parser 218: }
219:
220: return error;
221: }
222:
223: /** connect
224: @param used_only_in_connect_url
1.4 paf 225: format: @b user:pass@service?
226: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 227: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 228: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
229: ORA_ENCRYPT_LOGIN=TRUE
230:
231: @todo environment manupulation doesnt look thread safe
1.1 parser 232: */
233: void connect(
234: char *used_only_in_connect_url,
235: SQL_Driver_services& services,
236: void **connection ///< output: OracleSQL_connection_struct *
237: ) {
238: // connections are cross-request, do not use services._alloc [linked with request]
239: OracleSQL_connection_struct &cs=
240: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
241:
242: char *user=used_only_in_connect_url;
243: char *service=lsplit(user, '@');
244: char *pwd=lsplit(user, ':');
1.4 paf 245: char *options=lsplit(service, '?');
1.1 parser 246:
247: if(!(user && pwd && service))
248: services._throw("mailformed connect part, must be 'user:pass@service'");
249:
1.10 paf 250: if(const char *error=options2env(options))
1.5 paf 251: services._throw(error);
1.4 paf 252:
1.1 parser 253: if(setjmp(cs.mark))
254: services._throw(cs.error);
255:
256: // Allocate and initialize OCIError handle, attempt #1
257: /*
258: grabbed from sample
259: /server.804/a58234/oci_func.htm#446192
260: but doc
261: /server.804/a58234/oci_func.htm#446100
262: doesnt have this param listed as allowed
263: 8.1.6 client library barks as OCI_INVALID_HANDLE
264: and debugging revealed that OCI_HTYPE_ENV param value is invalid
265: later in doc
266: /server.804/a58234/oci_func.htm#446192
267: on OCIEnvInit thay say
268: "No changes are done to an already initialized handle"
269: think, this is some sort of backward compatibility wonder.
270: leaving as it is, and without check()
271: */
272: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
273: // Initialize an environment handle, attempt #2
1.27 paf 274: check(cs, "EnvInit", OCIEnvInit(
1.1 parser 275: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
276: // Allocate and initialize OCIError handle
1.27 paf 277: check(cs, "HandleAlloc errhp", OCIHandleAlloc(
1.1 parser 278: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
279: // Allocate and initialize OCIServer handle
1.27 paf 280: check(cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.1 parser 281: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
282: // Attach to a 'service'; initialize server context handle
1.27 paf 283: check(cs, "ServerAttach", OCIServerAttach(
1.1 parser 284: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
285: // Allocate and initialize OCISvcCtx handle
1.27 paf 286: check(cs, "HandleAlloc svchp", OCIHandleAlloc(
1.1 parser 287: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
288: // set attribute server context in the service context
1.27 paf 289: check(cs, "AttrSet server-service", OCIAttrSet(
1.1 parser 290: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
291: (dvoid *)cs.srvhp, (ub4)0,
292: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
293: // allocate a user context handle
1.27 paf 294: check(cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.1 parser 295: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
296: // set 'user' name
1.27 paf 297: check(cs, "AttrSet user-session", OCIAttrSet(
1.1 parser 298: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
299: (dvoid *)user, (ub4)strlen(user),
300: OCI_ATTR_USERNAME, cs.errhp));
301: // set 'pwd' password
1.27 paf 302: check(cs, "AttrSet pwd-session", OCIAttrSet(
1.1 parser 303: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
304: (dvoid *)pwd, (ub4)strlen(pwd),
305: OCI_ATTR_PASSWORD, cs.errhp));
306: // Authenticate a user
1.27 paf 307: check(cs, "SessionBegin", OCISessionBegin(
1.1 parser 308: cs.svchp, cs.errhp, cs.usrhp,
309: OCI_CRED_RDBMS, OCI_DEFAULT));
310: // remember connection in session
1.27 paf 311: check(cs, "AttrSet service-session", OCIAttrSet(
1.1 parser 312: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
313: (dvoid *)cs.usrhp, (ub4)0,
314: OCI_ATTR_SESSION, cs.errhp));
315:
316: // return created connection
317: *(OracleSQL_connection_struct **)connection=&cs;
318: }
319: void disconnect(void *connection) {
320: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
321: // Terminate a user session
322: OCISessionEnd(
323: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
324: // Detach from a server; uninitialize server context handle
325: OCIServerDetach(
326: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
327: // Free a previously allocated handles
328: /*
329: oci will free them up as belonging to env
330: OCIHandleFree(
331: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
332: OCIHandleFree(
333: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
334: OCIHandleFree(
335: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
336: */
337: OCIHandleFree(
338: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
339:
340: // connections are cross-request, do not use services._alloc [linked with request]
341: ::free(&cs);
342: }
343: void commit(SQL_Driver_services& services, void *connection) {
344: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
345: if(setjmp(cs.mark))
346: services._throw(cs.error);
347:
1.27 paf 348: check(cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
1.1 parser 349: }
350: void rollback(SQL_Driver_services& services, void *connection) {
351: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
352: if(setjmp(cs.mark))
353: services._throw(cs.error);
354:
1.27 paf 355: check(cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
1.1 parser 356: }
357:
358: bool ping(SQL_Driver_services&, void *connection) {
359: // maybe OCIServerVersion?
1.4 paf 360: // select 0 from dual
1.1 parser 361: return true;
362: }
363:
364: unsigned int quote(
365: SQL_Driver_services&, void *,
366: char *to, const char *from, unsigned int length) {
1.15 paf 367: if(to) { // store mode
368: unsigned int result=length;
369: while(length--) {
370: switch(*from) {
371: case '\'': // "'" -> "''"
372: *to++='\''; result++;
373: break;
374: }
375: *to++=*from++;
1.1 parser 376: }
1.15 paf 377: return result;
378: } else // estimate mode
379: return length*2;
1.1 parser 380: }
381: void query(
382: SQL_Driver_services& services, void *connection,
383: const char *astatement, unsigned long offset, unsigned long limit,
384: SQL_Driver_query_event_handlers& handlers) {
385:
386: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
387: OracleSQL_query_lobs lobs={{0}, 0};
388: OCIStmt *stmthp=0;
389:
390: bool failed=false;
391: if(setjmp(cs.mark)) {
392: failed=true;
393: goto cleanup;
394: } else {
395: const char *statement=preprocess_statement(services, cs,
396: astatement, lobs);
397:
1.27 paf 398: check(cs, "HandleAlloc STMT", OCIHandleAlloc(
1.1 parser 399: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.27 paf 400: check(cs, "syntax",
1.1 parser 401: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
402: (ub4)strlen((char *)statement),
403: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
404: {
405: for(int i=0; i<lobs.count; i++) {
1.27 paf 406: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.1 parser 407: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
408:
1.27 paf 409: check(cs, "bind output", OCIBindByPos(stmthp,
1.1 parser 410: &lobs.items[i].bind, cs.errhp,
411: (ub4)1+i,
412: (dvoid *)&lobs.items[i].locator,
413: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
414: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
415:
416: lobs.items[i].rows.count=0;
1.31 ! paf 417: OracleSQL_query_lobs::cbf_context_struct& cbf_context=lobs.items[i].cbf_context;
! 418: cbf_context.services=&services;
! 419: cbf_context.cs=&cs;
! 420: cbf_context.rows=&lobs.items[i].rows;
1.27 paf 421: check(cs, "bind dynamic", OCIBindDynamic(
1.1 parser 422: lobs.items[i].bind, cs.errhp,
423: (dvoid *) &cbf_context, cbf_no_data,
424: (dvoid *) &cbf_context, cbf_get_data));
425: }
426: }
427:
1.26 paf 428: execute_prepared(services, cs,
429: statement, stmthp, lobs,
430: offset, limit, handlers);
1.1 parser 431: }
432: cleanup: // no check call after this point!
433: {
434: for(int i=0; i<lobs.count; i++) {
435: /* free var locator */
436: if(OCILobLocator *locator=lobs.items[i].locator)
437: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
438:
439: /* free rows descriptors */
440: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
441: for(int r=0; r<rows.count; r++)
442: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
443: }
444: }
445: if(stmthp)
446: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
447:
1.26 paf 448: if(failed) {
1.27 paf 449: if(cs.sql_error.defined())
450: services._throw(cs.sql_error);
1.1 parser 451: services._throw(cs.error);
1.26 paf 452: }
1.1 parser 453: }
454:
455: private: // private funcs
456:
457: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
458: const char *astatement, OracleSQL_query_lobs &lobs) {
459: size_t statement_size=strlen(astatement);
460:
461: char *result=(char *)services.malloc(statement_size
462: +MAX_STRING // in case of short 'strings'
463: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
464: +1);
465: const char *o=astatement;
466:
467: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
468: char *n=result;
469: while(*o) {
470: if(
471: o[0]=='/' &&
472: o[1]=='*' &&
473: o[2]=='*') { // name start
474: o+=3;
475: const char *name_begin=o;
476: while(*o)
477: if(
478: o[0]=='*' &&
479: o[1]=='*' &&
480: o[2]=='/' &&
481: o[3]=='\'') { // name end
482: const char *name_end=o;
483: o+=4;
484: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
485: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
486: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
487:
488: const char *start=o;
489: bool escaped=false;
490: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 491: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 492: if(escaped) {
493: // write pending, skip "\" or "'"
494: if(size_t size=o-start) {
495: memcpy(item.data_ptr+item.data_size, start, size);
496: item.data_size+=size;
497: }
498: start=++o;
499: } else
500: o++;
501: }
502: if(size_t size=o-start) {
503: memcpy(item.data_ptr+item.data_size, start, size);
504: item.data_size+=size;
505: }
506: if(*o)
507: o++; // skip "'"
508:
509: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
510: break;
511: } else
512: o++; // /**skip**/'xxx'
513: } else
514: *n++=*o++;
515: }
516: *n=0;
517:
518: if(lobs.count) {
519: int i;
520: n+=sprintf(n, " returning ");
521: for(i=0; i<lobs.count; i++) {
522: if(i)
523: *n++=',';
524: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
525: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
526: n+=lobs.items[i].name_size;*/
527: }
528: n+=sprintf(n, " into ");
529: for(i=0; i<lobs.count; i++) {
530: if(i)
1.30 paf 531: *n++=',';
1.1 parser 532: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
533: /**n++=':';
534: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
535: n+=lobs.items[i].name_size;*/
536: }
537: }
538:
539: return result;
540: }
541:
542: void execute_prepared(
543: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
544: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
545: unsigned long offset, unsigned long limit,
546: SQL_Driver_query_event_handlers& handlers) {
547:
548: ub2 stmt_type=0; // UNKNOWN
549: /*
550: //gpfs on sun. paf 000818
551: //Zanyway, this is needed before.
1.27 paf 552: check(cs, "get stmt type", OCIAttrGet(
1.1 parser 553: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
554: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
555: */
1.16 paf 556:
1.17 paf 557: while(isspace(*statement))
1.16 paf 558: statement++;
1.1 parser 559: if(strncasecmp(statement, "select", 6)==0)
560: stmt_type=OCI_STMT_SELECT;
561: else if(strncasecmp(statement, "insert", 6)==0)
562: stmt_type=OCI_STMT_INSERT;
563: else if(strncasecmp(statement, "update", 6)==0)
564: stmt_type=OCI_STMT_UPDATE;
565:
566: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
567: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
568: (OCISnapshot *)NULL,
569: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
570:
571: if(status!=OCI_NO_DATA)
1.27 paf 572: check(cs, "execute", status);
1.1 parser 573:
574: {
575: for(int i=0; i<lobs.count; i++)
576: if(ub4 bytes_to_write=lobs.items[i].data_size) {
577: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
578: for(int r=0; r<rows->count; r++) {
579: OCILobLocator *locator=rows->row[r].locator;
1.27 paf 580: check(cs, "lobwrite", OCILobWrite (
1.1 parser 581: cs.svchp, cs.errhp,
582: locator, &bytes_to_write, 1,
583: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
584: (dvoid *)0, 0, (ub2)0,
585: (ub1) SQLCS_IMPLICIT));
586: }
587: }
588: }
589:
590: switch(stmt_type) {
591: case OCI_STMT_SELECT:
592: fetch_table(services, cs,
593: stmthp, offset, limit,
594: handlers);
595: break;
596: default:
597: /*
598: case OCI_STMT_INSERT:
599: case OCI_STMT_UPDATE:
600: */
601: break;
602: }
603: }
604:
605: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
606: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
607: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 608:
1.10 paf 609: ub4 prefetch_rows=100;
1.27 paf 610: check(cs, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 611: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
612: (dvoid *)&prefetch_rows, (ub4)0,
613: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
614:
1.20 paf 615: ub4 prefetch_mem_size=100*0x400;
1.27 paf 616: check(cs, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 617: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
618: (dvoid *)&prefetch_mem_size, (ub4)0,
619: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 620:
621: OCIParam *mypard;
622: ub2 dtype;
623: text *col_name;
624:
625: struct {
626: ub2 type;
627: char *str;
628: OCILobLocator *var;
629: OCIDefine *def;
630: sb2 indicator;
631: } cols[MAX_COLS]={0};
632: int column_count=0;
633:
634: bool failed=false;
635: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
636: if(setjmp(cs.mark)) {
637: failed=true;
638: goto cleanup;
639: } else {
1.27 paf 640: // idea of preincrementing is that at error time all handles would free up
641: while(++column_count<=MAX_COLS) {
642: /* get next descriptor, if there is one */
643: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
644: (ub4) column_count)!=OCI_SUCCESS) {
645: --column_count;
646: break;
647: }
648:
649: /* Retrieve the data type attribute */
650: check(cs, "get type", OCIAttrGet(
651: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
652: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
653: (OCIError *)cs.errhp));
654:
655: /* Retrieve the column name attribute */
656: ub4 col_name_len;
657: check(cs, "get name", OCIAttrGet(
658: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
659: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
660: (OCIError *)cs.errhp));
661:
662: {
663: size_t size=(size_t)col_name_len;
664: char *ptr=(char *)services.malloc(size);
665: tolower(ptr, (char *)col_name, size);
666: check(cs, handlers.add_column(cs.sql_error, ptr, size));
667: }
668:
669: ub2 coerce_type=dtype;
670: sb4 size=0;
671: void *ptr;
672:
673: switch(dtype) {
674: case SQLT_CLOB:
1.1 parser 675: {
1.27 paf 676: check(cs, "alloc output var desc", OCIDescriptorAlloc(
677: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
678: (ub4)OCI_DTYPE_LOB,
679: 0, (dvoid **)0));
680:
681: size=0;
1.1 parser 682: break;
683: }
1.27 paf 684: default:
685: coerce_type=SQLT_STR;
686: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
687: size=MAX_OUT_STRING_LENGTH;
688: break;
1.1 parser 689: }
690:
1.27 paf 691: cols[column_count-1].type=coerce_type;
1.1 parser 692:
1.27 paf 693: check(cs, "DefineByPos", OCIDefineByPos(
694: stmthp, &cols[column_count-1].def, cs.errhp,
695: column_count, (ub1 *) ptr, size,
696: coerce_type, (dvoid *) &cols[column_count-1].indicator,
697: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
698: }
699:
700: check(cs, handlers.before_rows(cs.sql_error));
701:
702: for(unsigned long row=0; !limit||row<offset+limit; row++) {
703: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
704: (ub4)OCI_DEFAULT);
705: if(status==OCI_NO_DATA)
706: break;
707: check(cs, "fetch", status);
1.3 paf 708:
1.27 paf 709: if(row>=offset) {
710: check(cs, handlers.add_row(cs.sql_error));
711: for(int i=0; i<column_count; i++) {
712: size_t size=0;
713: void *ptr=0;
714: if(!cols[i].indicator) // not NULL
715: switch(cols[i].type) {
716: case SQLT_CLOB:
717: {
718: ub4 amtp=4096000000UL;
719: ub4 offset=1;
720: ub4 loblen=0;
721: OCILobLocator *var=(OCILobLocator *)cols[i].var;
722: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
723: if(loblen) {
724: size=(size_t)loblen;
1.1 parser 725: ptr=services.malloc(size);
1.27 paf 726: check(cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
727: var, &amtp, offset, (dvoid *) ptr,
728: loblen, (dvoid *)0,
729: 0,
730: (ub2)0, (ub1) SQLCS_IMPLICIT));
1.1 parser 731: }
732: break;
733: }
1.27 paf 734: default:
735: if(const char *str=cols[i].str) {
736: size=strlen(str);
737: ptr=services.malloc(size);
738: memcpy(ptr, str, size);
739: } else {
740: size=0;
741: ptr=0;
742: }
743: break;
744: }
745: check(cs, handlers.add_row_cell(cs.sql_error, ptr, size));
1.1 parser 746: }
747: }
748: }
749: }
750:
751: cleanup: // no check call after this point!
752: for(int i=0; i<column_count; i++) {
753: switch(cols[i].type) {
754: case SQLT_CLOB:
755: /* free var locator */
756: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
757: break;
758: default:
759: break;
760: }
761: }
762:
763: if(failed) // need rethrow?
764: longjmp(saved_mark, 1);
765: }
766:
767: private: // conn client library funcs
768:
1.27 paf 769: friend void check(OracleSQL_connection_struct &cs, const char *step, sword status);
1.1 parser 770: friend sb4 cbf_get_data(dvoid *ctxp,
771: OCIBind *bindp,
772: ub4 iter, ub4 index,
773: dvoid **bufpp,
774: ub4 **alenp,
775: ub1 *piecep,
776: dvoid **indpp,
777: ub2 **rcodepp);
778:
779:
780: #define OCI_DECL(name, params) \
781: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
782:
783: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
784: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
785: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
786: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
787:
788: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
789: size_t xtramem_sz, dvoid **usrmempp));
790:
791: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
792: dvoid *attributep, ub4 *sizep, ub4 attrtype,
793: OCIError *errhp));
794:
795: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
796: ub4 size, ub4 attrtype, OCIError *errhp));
797:
798: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
799: ub4 position, dvoid *valuep, sb4 value_sz,
800: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
801: ub4 maxarr_len, ub4 *curelep, ub4 mode));
802:
803: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
804: OCICallbackInBind icbfp, dvoid *octxp,
805: OCICallbackOutBind ocbfp));
806:
807: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
808: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
809: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
810:
811: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
812: CONST ub4 type, CONST size_t xtramem_sz,
813: dvoid **usrmempp));
814:
815: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
816:
817:
818: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
819: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
820:
821: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
822: CONST size_t xtramem_sz, dvoid **usrmempp));
823:
824: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
825:
826: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
827: OCILobLocator *locp,
828: ub4 *lenp));
829:
830: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
831: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
832: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
833: CONST dvoid *bufp,
834: ub4 len,
835: ub1 piece),
836: ub2 csid, ub1 csfrm));
837:
838: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
839: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
840: ub1 piece, dvoid *ctxp,
841: sb4 (*cbfp)(dvoid *ctxp,
842: dvoid *bufp,
843: ub4 *len,
844: ub1 *piece),
845: ub2 csid, ub1 csfrm));
846:
847: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
848: dvoid **parmdpp, ub4 pos));
849:
850: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
851: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
852:
853: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
854:
855: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
856: ub4 credt, ub4 mode));
857:
858: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
859: ub4 mode));
860:
861: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
862: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
863: OCISnapshot *snap_out, ub4 mode));
864:
865: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
866: ub2 orientation, ub4 mode));
867:
868: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
869: ub4 stmt_len, ub4 language, ub4 mode));
870:
871: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
872:
873: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
874:
875: private: // conn client library funcs linking
876:
877: const char *dlink(const char *dlopen_file_spec) {
878: if(lt_dlinit())
879: return lt_dlerror();
880: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
881: if(!handle)
882: return lt_dlerror(); //"can not open the dynamic link module";
883:
884: #define DSLINK(name, action) \
885: name=(t_##name)lt_dlsym(handle, #name); \
886: if(!name) \
887: action;
888:
889: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
890:
891: OCI_LINK(Initialize);
892: OCI_LINK(EnvInit);
893: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
894: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
895: OCI_LINK(DefineByPos);
896: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
897: OCI_LINK(ErrorGet);
898: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
899: OCI_LINK(LobGetLength);
900: OCI_LINK(LobRead); OCI_LINK(LobWrite);
901: OCI_LINK(ParamGet);
902: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
903: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
904: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
905: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
906:
907: return 0;
908: }
909:
910: } *OracleSQL_driver;
911:
1.27 paf 912: void check(OracleSQL_connection_struct &cs, const char *step, sword status) {
1.1 parser 913:
914: const char *msg;
915: char reason[MAX_STRING/2];
916:
1.21 paf 917: const char *prefix="ERROR";
1.1 parser 918: switch (status) {
1.22 paf 919: case OCI_SUCCESS: // hurrah
920: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
921: // count() not counting them and gives that status
922: return;
1.1 parser 923: case OCI_ERROR:
924: {
925: sb4 errcode;
926: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
927: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
928: msg=reason;
929: else
930: msg="[can not get error description]";
931: break;
932: }
933: case OCI_NEED_DATA:
934: msg="NEED_DATA"; break;
935: case OCI_NO_DATA:
936: msg="NODATA"; break;
937: case OCI_INVALID_HANDLE:
938: msg="INVALID_HANDLE"; break;
939: case OCI_STILL_EXECUTING:
940: msg="STILL_EXECUTE"; break;
941: case OCI_CONTINUE:
942: msg="CONTINUE"; break;
943: default:
944: msg="unknown"; break;
945: }
946:
1.22 paf 947: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
948: msg, step, (int)status);
1.1 parser 949: longjmp(cs.mark, 1);
950: }
951:
1.27 paf 952: void check(OracleSQL_connection_struct &cs, bool error) {
953: if(error)
954: longjmp(cs.mark, 1);
955: }
1.1 parser 956:
957: /* ----------------------------------------------------------------- */
958: /* Intbind callback that does not do any data input. */
959: /* ----------------------------------------------------------------- */
960: static sb4 cbf_no_data(
961: dvoid *ctxp,
962: OCIBind *bindp,
963: ub4 iter, ub4 index,
964: dvoid **bufpp,
965: ub4 *alenpp,
966: ub1 *piecep,
967: dvoid **indpp) {
968: *bufpp=(dvoid *)0;
969: *alenpp=0;
970: static sb2 null_ind=-1;
971: *indpp=(dvoid *) &null_ind;
972: *piecep=OCI_ONE_PIECE;
973:
974: return OCI_CONTINUE;
975: }
976:
977: /* ----------------------------------------------------------------- */
978: /* Outbind callback for returning data. */
979: /* ----------------------------------------------------------------- */
980: static sb4 cbf_get_data(dvoid *ctxp,
981: OCIBind *bindp,
982: ub4 iter, ub4 index,
983: dvoid **bufpp,
984: ub4 **alenp,
985: ub1 *piecep,
986: dvoid **indpp,
987: ub2 **rcodepp) {
988: OracleSQL_query_lobs::cbf_context_struct &context=
989: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
990:
991: if(index==0) {
992: static ub4 rows;
1.27 paf 993: check(*context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 994: OracleSQL_driver->OCIAttrGet(
995: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
996: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
997: context.rows->count=(ub2)rows;
998: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
999: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1000: }
1001:
1002: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1003:
1.27 paf 1004: check(*context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 1005: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1006: (ub4)OCI_DTYPE_LOB,
1007: 0, (dvoid **)0));
1008:
1009: *bufpp=var.locator;
1010: *alenp=&var.len;
1011: *indpp=(dvoid *) &var.ind;
1012: *piecep=OCI_ONE_PIECE;
1013: *rcodepp=&var.rcode;
1014:
1015: return OCI_CONTINUE;
1016: }
1017:
1018: void tolower(char *out, const char *in, size_t size) {
1019: while(size--)
1020: *out++=tolower(*in++);
1021: }
1022:
1023: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1024: //_asm int 3;
1025: return OracleSQL_driver=new OracleSQL_Driver();
1026: }