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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: */
1.29 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.28 2003/01/15 10:54:58 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;
163: } items[MAX_IN_LOBS];
164: int count;
165: };
166: #endif
167:
168: // forwards
1.27 paf 169: void check(OracleSQL_connection_struct &cs, const char *step, sword status);
170: void check(OracleSQL_connection_struct &cs, bool error);
1.1 parser 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
1.27 paf 273: check(cs, "EnvInit", OCIEnvInit(
1.1 parser 274: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
275: // Allocate and initialize OCIError handle
1.27 paf 276: check(cs, "HandleAlloc errhp", OCIHandleAlloc(
1.1 parser 277: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
278: // Allocate and initialize OCIServer handle
1.27 paf 279: check(cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.1 parser 280: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
281: // Attach to a 'service'; initialize server context handle
1.27 paf 282: check(cs, "ServerAttach", OCIServerAttach(
1.1 parser 283: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
284: // Allocate and initialize OCISvcCtx handle
1.27 paf 285: check(cs, "HandleAlloc svchp", OCIHandleAlloc(
1.1 parser 286: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
287: // set attribute server context in the service context
1.27 paf 288: check(cs, "AttrSet server-service", OCIAttrSet(
1.1 parser 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
1.27 paf 293: check(cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.1 parser 294: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
295: // set 'user' name
1.27 paf 296: check(cs, "AttrSet user-session", OCIAttrSet(
1.1 parser 297: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
298: (dvoid *)user, (ub4)strlen(user),
299: OCI_ATTR_USERNAME, cs.errhp));
300: // set 'pwd' password
1.27 paf 301: check(cs, "AttrSet pwd-session", OCIAttrSet(
1.1 parser 302: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
303: (dvoid *)pwd, (ub4)strlen(pwd),
304: OCI_ATTR_PASSWORD, cs.errhp));
305: // Authenticate a user
1.27 paf 306: check(cs, "SessionBegin", OCISessionBegin(
1.1 parser 307: cs.svchp, cs.errhp, cs.usrhp,
308: OCI_CRED_RDBMS, OCI_DEFAULT));
309: // remember connection in session
1.27 paf 310: check(cs, "AttrSet service-session", OCIAttrSet(
1.1 parser 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:
1.27 paf 347: check(cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
1.1 parser 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:
1.27 paf 354: check(cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
1.1 parser 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:
1.27 paf 397: check(cs, "HandleAlloc STMT", OCIHandleAlloc(
1.1 parser 398: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.27 paf 399: check(cs, "syntax",
1.1 parser 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++) {
1.27 paf 405: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.1 parser 406: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
407:
1.27 paf 408: check(cs, "bind output", OCIBindByPos(stmthp,
1.1 parser 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};
1.27 paf 418: check(cs, "bind dynamic", OCIBindDynamic(
1.1 parser 419: lobs.items[i].bind, cs.errhp,
420: (dvoid *) &cbf_context, cbf_no_data,
421: (dvoid *) &cbf_context, cbf_get_data));
422: }
423: }
424:
1.26 paf 425: execute_prepared(services, cs,
426: statement, stmthp, lobs,
427: offset, limit, handlers);
1.1 parser 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:
1.26 paf 445: if(failed) {
1.27 paf 446: if(cs.sql_error.defined())
447: services._throw(cs.sql_error);
1.1 parser 448: services._throw(cs.error);
1.26 paf 449: }
1.1 parser 450: }
451:
452: private: // private funcs
453:
454: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
455: const char *astatement, OracleSQL_query_lobs &lobs) {
456: size_t statement_size=strlen(astatement);
457:
458: char *result=(char *)services.malloc(statement_size
459: +MAX_STRING // in case of short 'strings'
460: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
461: +1);
462: const char *o=astatement;
463:
464: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
465: char *n=result;
466: while(*o) {
467: if(
468: o[0]=='/' &&
469: o[1]=='*' &&
470: o[2]=='*') { // name start
471: o+=3;
472: const char *name_begin=o;
473: while(*o)
474: if(
475: o[0]=='*' &&
476: o[1]=='*' &&
477: o[2]=='/' &&
478: o[3]=='\'') { // name end
479: const char *name_end=o;
480: o+=4;
481: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
482: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
483: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
484:
485: const char *start=o;
486: bool escaped=false;
487: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 488: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 489: if(escaped) {
490: // write pending, skip "\" or "'"
491: if(size_t size=o-start) {
492: memcpy(item.data_ptr+item.data_size, start, size);
493: item.data_size+=size;
494: }
495: start=++o;
496: } else
497: o++;
498: }
499: if(size_t size=o-start) {
500: memcpy(item.data_ptr+item.data_size, start, size);
501: item.data_size+=size;
502: }
503: if(*o)
504: o++; // skip "'"
505:
506: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
507: break;
508: } else
509: o++; // /**skip**/'xxx'
510: } else
511: *n++=*o++;
512: }
513: *n=0;
514:
515: if(lobs.count) {
516: int i;
517: n+=sprintf(n, " returning ");
518: for(i=0; i<lobs.count; i++) {
519: if(i)
520: *n++=',';
521: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
522: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
523: n+=lobs.items[i].name_size;*/
524: }
525: n+=sprintf(n, " into ");
526: for(i=0; i<lobs.count; i++) {
527: if(i)
528: *n++='x';
529: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
530: /**n++=':';
531: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
532: n+=lobs.items[i].name_size;*/
533: }
534: }
535:
536: return result;
537: }
538:
539: void execute_prepared(
540: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
541: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
542: unsigned long offset, unsigned long limit,
543: SQL_Driver_query_event_handlers& handlers) {
544:
545: ub2 stmt_type=0; // UNKNOWN
546: /*
547: //gpfs on sun. paf 000818
548: //Zanyway, this is needed before.
1.27 paf 549: check(cs, "get stmt type", OCIAttrGet(
1.1 parser 550: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
551: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
552: */
1.16 paf 553:
1.17 paf 554: while(isspace(*statement))
1.16 paf 555: statement++;
1.1 parser 556: if(strncasecmp(statement, "select", 6)==0)
557: stmt_type=OCI_STMT_SELECT;
558: else if(strncasecmp(statement, "insert", 6)==0)
559: stmt_type=OCI_STMT_INSERT;
560: else if(strncasecmp(statement, "update", 6)==0)
561: stmt_type=OCI_STMT_UPDATE;
562:
563: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
564: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
565: (OCISnapshot *)NULL,
566: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
567:
568: if(status!=OCI_NO_DATA)
1.27 paf 569: check(cs, "execute", status);
1.1 parser 570:
571: {
572: for(int i=0; i<lobs.count; i++)
573: if(ub4 bytes_to_write=lobs.items[i].data_size) {
574: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
575: for(int r=0; r<rows->count; r++) {
576: OCILobLocator *locator=rows->row[r].locator;
1.27 paf 577: check(cs, "lobwrite", OCILobWrite (
1.1 parser 578: cs.svchp, cs.errhp,
579: locator, &bytes_to_write, 1,
580: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
581: (dvoid *)0, 0, (ub2)0,
582: (ub1) SQLCS_IMPLICIT));
583: }
584: }
585: }
586:
587: switch(stmt_type) {
588: case OCI_STMT_SELECT:
589: fetch_table(services, cs,
590: stmthp, offset, limit,
591: handlers);
592: break;
593: default:
594: /*
595: case OCI_STMT_INSERT:
596: case OCI_STMT_UPDATE:
597: */
598: break;
599: }
600: }
601:
602: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
603: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
604: SQL_Driver_query_event_handlers& handlers) {
1.12 paf 605:
1.10 paf 606: ub4 prefetch_rows=100;
1.27 paf 607: check(cs, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 608: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
609: (dvoid *)&prefetch_rows, (ub4)0,
610: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
611:
1.20 paf 612: ub4 prefetch_mem_size=100*0x400;
1.27 paf 613: check(cs, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 614: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
615: (dvoid *)&prefetch_mem_size, (ub4)0,
616: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 617:
618: OCIParam *mypard;
619: ub2 dtype;
620: text *col_name;
621:
622: struct {
623: ub2 type;
624: char *str;
625: OCILobLocator *var;
626: OCIDefine *def;
627: sb2 indicator;
628: } cols[MAX_COLS]={0};
629: int column_count=0;
630:
631: bool failed=false;
632: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
633: if(setjmp(cs.mark)) {
634: failed=true;
635: goto cleanup;
636: } else {
1.27 paf 637: // idea of preincrementing is that at error time all handles would free up
638: while(++column_count<=MAX_COLS) {
639: /* get next descriptor, if there is one */
640: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
641: (ub4) column_count)!=OCI_SUCCESS) {
642: --column_count;
643: break;
644: }
645:
646: /* Retrieve the data type attribute */
647: check(cs, "get type", OCIAttrGet(
648: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
649: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
650: (OCIError *)cs.errhp));
651:
652: /* Retrieve the column name attribute */
653: ub4 col_name_len;
654: check(cs, "get name", OCIAttrGet(
655: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
656: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
657: (OCIError *)cs.errhp));
658:
659: {
660: size_t size=(size_t)col_name_len;
661: char *ptr=(char *)services.malloc(size);
662: tolower(ptr, (char *)col_name, size);
663: check(cs, handlers.add_column(cs.sql_error, ptr, size));
664: }
665:
666: ub2 coerce_type=dtype;
667: sb4 size=0;
668: void *ptr;
669:
670: switch(dtype) {
671: case SQLT_CLOB:
1.1 parser 672: {
1.27 paf 673: check(cs, "alloc output var desc", OCIDescriptorAlloc(
674: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
675: (ub4)OCI_DTYPE_LOB,
676: 0, (dvoid **)0));
677:
678: size=0;
1.1 parser 679: break;
680: }
1.27 paf 681: default:
682: coerce_type=SQLT_STR;
683: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
684: size=MAX_OUT_STRING_LENGTH;
685: break;
1.1 parser 686: }
687:
1.27 paf 688: cols[column_count-1].type=coerce_type;
1.1 parser 689:
1.27 paf 690: check(cs, "DefineByPos", OCIDefineByPos(
691: stmthp, &cols[column_count-1].def, cs.errhp,
692: column_count, (ub1 *) ptr, size,
693: coerce_type, (dvoid *) &cols[column_count-1].indicator,
694: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
695: }
696:
697: check(cs, handlers.before_rows(cs.sql_error));
698:
699: for(unsigned long row=0; !limit||row<offset+limit; row++) {
700: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
701: (ub4)OCI_DEFAULT);
702: if(status==OCI_NO_DATA)
703: break;
704: check(cs, "fetch", status);
1.3 paf 705:
1.27 paf 706: if(row>=offset) {
707: check(cs, handlers.add_row(cs.sql_error));
708: for(int i=0; i<column_count; i++) {
709: size_t size=0;
710: void *ptr=0;
711: if(!cols[i].indicator) // not NULL
712: switch(cols[i].type) {
713: case SQLT_CLOB:
714: {
715: ub4 amtp=4096000000UL;
716: ub4 offset=1;
717: ub4 loblen=0;
718: OCILobLocator *var=(OCILobLocator *)cols[i].var;
719: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
720: if(loblen) {
721: size=(size_t)loblen;
1.1 parser 722: ptr=services.malloc(size);
1.27 paf 723: check(cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
724: var, &amtp, offset, (dvoid *) ptr,
725: loblen, (dvoid *)0,
726: 0,
727: (ub2)0, (ub1) SQLCS_IMPLICIT));
1.1 parser 728: }
729: break;
730: }
1.27 paf 731: default:
732: if(const char *str=cols[i].str) {
733: size=strlen(str);
734: ptr=services.malloc(size);
735: memcpy(ptr, str, size);
736: } else {
737: size=0;
738: ptr=0;
739: }
740: break;
741: }
742: check(cs, handlers.add_row_cell(cs.sql_error, ptr, size));
1.1 parser 743: }
744: }
745: }
746: }
747:
748: cleanup: // no check call after this point!
749: for(int i=0; i<column_count; i++) {
750: switch(cols[i].type) {
751: case SQLT_CLOB:
752: /* free var locator */
753: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
754: break;
755: default:
756: break;
757: }
758: }
759:
760: if(failed) // need rethrow?
761: longjmp(saved_mark, 1);
762: }
763:
764: private: // conn client library funcs
765:
1.27 paf 766: friend void check(OracleSQL_connection_struct &cs, const char *step, sword status);
1.1 parser 767: friend sb4 cbf_get_data(dvoid *ctxp,
768: OCIBind *bindp,
769: ub4 iter, ub4 index,
770: dvoid **bufpp,
771: ub4 **alenp,
772: ub1 *piecep,
773: dvoid **indpp,
774: ub2 **rcodepp);
775:
776:
777: #define OCI_DECL(name, params) \
778: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
779:
780: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
781: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
782: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
783: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
784:
785: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
786: size_t xtramem_sz, dvoid **usrmempp));
787:
788: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
789: dvoid *attributep, ub4 *sizep, ub4 attrtype,
790: OCIError *errhp));
791:
792: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
793: ub4 size, ub4 attrtype, OCIError *errhp));
794:
795: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
796: ub4 position, dvoid *valuep, sb4 value_sz,
797: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
798: ub4 maxarr_len, ub4 *curelep, ub4 mode));
799:
800: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
801: OCICallbackInBind icbfp, dvoid *octxp,
802: OCICallbackOutBind ocbfp));
803:
804: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
805: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
806: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
807:
808: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
809: CONST ub4 type, CONST size_t xtramem_sz,
810: dvoid **usrmempp));
811:
812: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
813:
814:
815: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
816: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
817:
818: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
819: CONST size_t xtramem_sz, dvoid **usrmempp));
820:
821: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
822:
823: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
824: OCILobLocator *locp,
825: ub4 *lenp));
826:
827: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
828: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
829: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
830: CONST dvoid *bufp,
831: ub4 len,
832: ub1 piece),
833: ub2 csid, ub1 csfrm));
834:
835: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
836: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
837: ub1 piece, dvoid *ctxp,
838: sb4 (*cbfp)(dvoid *ctxp,
839: dvoid *bufp,
840: ub4 *len,
841: ub1 *piece),
842: ub2 csid, ub1 csfrm));
843:
844: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
845: dvoid **parmdpp, ub4 pos));
846:
847: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
848: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
849:
850: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
851:
852: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
853: ub4 credt, ub4 mode));
854:
855: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
856: ub4 mode));
857:
858: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
859: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
860: OCISnapshot *snap_out, ub4 mode));
861:
862: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
863: ub2 orientation, ub4 mode));
864:
865: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
866: ub4 stmt_len, ub4 language, ub4 mode));
867:
868: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
869:
870: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
871:
872: private: // conn client library funcs linking
873:
874: const char *dlink(const char *dlopen_file_spec) {
875: if(lt_dlinit())
876: return lt_dlerror();
877: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
878: if(!handle)
879: return lt_dlerror(); //"can not open the dynamic link module";
880:
881: #define DSLINK(name, action) \
882: name=(t_##name)lt_dlsym(handle, #name); \
883: if(!name) \
884: action;
885:
886: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
887:
888: OCI_LINK(Initialize);
889: OCI_LINK(EnvInit);
890: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
891: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
892: OCI_LINK(DefineByPos);
893: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
894: OCI_LINK(ErrorGet);
895: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
896: OCI_LINK(LobGetLength);
897: OCI_LINK(LobRead); OCI_LINK(LobWrite);
898: OCI_LINK(ParamGet);
899: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
900: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
901: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
902: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
903:
904: return 0;
905: }
906:
907: } *OracleSQL_driver;
908:
1.27 paf 909: void check(OracleSQL_connection_struct &cs, const char *step, sword status) {
1.1 parser 910:
911: const char *msg;
912: char reason[MAX_STRING/2];
913:
1.21 paf 914: const char *prefix="ERROR";
1.1 parser 915: switch (status) {
1.22 paf 916: case OCI_SUCCESS: // hurrah
917: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
918: // count() not counting them and gives that status
919: return;
1.1 parser 920: case OCI_ERROR:
921: {
922: sb4 errcode;
923: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
924: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
925: msg=reason;
926: else
927: msg="[can not get error description]";
928: break;
929: }
930: case OCI_NEED_DATA:
931: msg="NEED_DATA"; break;
932: case OCI_NO_DATA:
933: msg="NODATA"; break;
934: case OCI_INVALID_HANDLE:
935: msg="INVALID_HANDLE"; break;
936: case OCI_STILL_EXECUTING:
937: msg="STILL_EXECUTE"; break;
938: case OCI_CONTINUE:
939: msg="CONTINUE"; break;
940: default:
941: msg="unknown"; break;
942: }
943:
1.22 paf 944: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
945: msg, step, (int)status);
1.1 parser 946: longjmp(cs.mark, 1);
947: }
948:
1.27 paf 949: void check(OracleSQL_connection_struct &cs, bool error) {
950: if(error)
951: longjmp(cs.mark, 1);
952: }
1.1 parser 953:
954: /* ----------------------------------------------------------------- */
955: /* Intbind callback that does not do any data input. */
956: /* ----------------------------------------------------------------- */
957: static sb4 cbf_no_data(
958: dvoid *ctxp,
959: OCIBind *bindp,
960: ub4 iter, ub4 index,
961: dvoid **bufpp,
962: ub4 *alenpp,
963: ub1 *piecep,
964: dvoid **indpp) {
965: *bufpp=(dvoid *)0;
966: *alenpp=0;
967: static sb2 null_ind=-1;
968: *indpp=(dvoid *) &null_ind;
969: *piecep=OCI_ONE_PIECE;
970:
971: return OCI_CONTINUE;
972: }
973:
974: /* ----------------------------------------------------------------- */
975: /* Outbind callback for returning data. */
976: /* ----------------------------------------------------------------- */
977: static sb4 cbf_get_data(dvoid *ctxp,
978: OCIBind *bindp,
979: ub4 iter, ub4 index,
980: dvoid **bufpp,
981: ub4 **alenp,
982: ub1 *piecep,
983: dvoid **indpp,
984: ub2 **rcodepp) {
985: OracleSQL_query_lobs::cbf_context_struct &context=
986: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
987:
988: if(index==0) {
989: static ub4 rows;
1.27 paf 990: check(*context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 991: OracleSQL_driver->OCIAttrGet(
992: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
993: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
994: context.rows->count=(ub2)rows;
995: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
996: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
997: }
998:
999: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1000:
1.27 paf 1001: check(*context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 1002: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1003: (ub4)OCI_DTYPE_LOB,
1004: 0, (dvoid **)0));
1005:
1006: *bufpp=var.locator;
1007: *alenp=&var.len;
1008: *indpp=(dvoid *) &var.ind;
1009: *piecep=OCI_ONE_PIECE;
1010: *rcodepp=&var.rcode;
1011:
1012: return OCI_CONTINUE;
1013: }
1014:
1015: void tolower(char *out, const char *in, size_t size) {
1016: while(size--)
1017: *out++=tolower(*in++);
1018: }
1019:
1020: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1021: //_asm int 3;
1022: return OracleSQL_driver=new OracleSQL_Driver();
1023: }