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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: */
1.44 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.43 2003/12/22 12:38:50 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:
1.1 parser 107: #ifndef DOXYGEN
108: struct OracleSQL_connection_struct {
1.42 paf 109: SQL_Driver_services *services;
110:
1.1 parser 111: jmp_buf mark; char error[MAX_STRING];
1.27 paf 112: SQL_Error sql_error;
1.1 parser 113: OCIEnv *envhp;
114: OCIServer *srvhp;
115: OCIError *errhp;
116: OCISvcCtx *svchp;
117: OCISession *usrhp;
1.39 paf 118:
1.42 paf 119: struct Options {
120: bool bLowerCaseColumnNames;
121: const char* cstrClientCharset;
122: } options;
1.1 parser 123: };
124:
125: struct OracleSQL_query_lobs {
126: struct return_rows {
127: struct return_row {
128: OCILobLocator *locator; ub4 len;
129: int ind;
130: ub2 rcode;
131: } *row;
132: int count;
133: };
134: struct cbf_context_struct {
135: OracleSQL_connection_struct *cs;
136: return_rows *rows;
137: };
138: struct Item {
139: const char *name_ptr; size_t name_size;
140: char *data_ptr; size_t data_size;
141: OCILobLocator *locator;
142: OCIBind *bind;
143: return_rows rows;
144: } items[MAX_IN_LOBS];
145: int count;
146: };
147: #endif
148:
149: // forwards
1.27 paf 150: void check(OracleSQL_connection_struct &cs, const char *step, sword status);
151: void check(OracleSQL_connection_struct &cs, bool error);
1.1 parser 152: static sb4 cbf_no_data(
153: dvoid *ctxp,
154: OCIBind *bindp,
155: ub4 iter, ub4 index,
156: dvoid **bufpp,
157: ub4 *alenpp,
158: ub1 *piecep,
159: dvoid **indpp);
160: static sb4 cbf_get_data(dvoid *ctxp,
161: OCIBind *bindp,
162: ub4 iter, ub4 index,
163: dvoid **bufpp,
164: ub4 **alenp,
165: ub1 *piecep,
166: dvoid **indpp,
167: ub2 **rcodepp);
1.38 paf 168: void tolower(char *out, const char *in, size_t size);
1.44 ! paf 169: void toupper(char *out, const char *in, size_t size);
1.1 parser 170:
1.42 paf 171: static const char *options2env(char *s, OracleSQL_connection_struct::Options* options) {
172: while(s) {
173: if(char *key=lsplit(&s, '&')) {
174: if(*key) {
175: if(char *value=lsplit(key, '=')) {
176: if( strcmp( key, "ClientCharset" ) == 0 ) {
1.44 ! paf 177: if(options) {
! 178: toupper(value, value, strlen(value));
1.42 paf 179: options->cstrClientCharset = value;
1.44 ! paf 180: }
1.42 paf 181: continue;
182: }
183:
184: if( strcmp( key, "LowerCaseColumnNames" ) == 0 ) {
185: if(options)
186: options->bLowerCaseColumnNames = atoi(value)!=0;
187: continue;
188: }
189:
190: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
191: if(do_append)
192: key[strlen(key)-1]=0; // remove trailing +
193: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
194: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
195: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
196: || do_append
197: ) {
198: if(pa_setenv(key, value, do_append)!=0)
199: return "problem changing process environment" /*key*/;
200: } else
201: return "unknown option" /*key*/;
202: } else
203: return "option without =value" /*key*/;
204: }
205: }
206: }
207: return 0;
208: }
209:
1.1 parser 210: /**
211: OracleSQL server driver
212: */
213: class OracleSQL_Driver : public SQL_Driver {
214: public:
215:
216: OracleSQL_Driver() : SQL_Driver() {
217: }
218:
219: /// get api version
220: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 221: /** initialize driver by loading sql dynamic link library
222: @todo ?objects=1 which would turn on OCI_OBJECT init flag
223: */
1.5 paf 224: const char *initialize(char *dlopen_file_spec) {
225: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 226:
227: const char *error=dlopen_file_spec?
228: dlink(dlopen_file_spec):"client library column is empty";
229: if(!error) {
1.39 paf 230: error=options2env(options, 0);
1.1 parser 231:
1.5 paf 232: if(!error)
233: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
234: (dvoid * (*)(void *, unsigned int))0,
235: (dvoid * (*)(void*, void*, unsigned int))0,
236: (void (*)(void*, void*))0
237: );
1.1 parser 238: }
239:
240: return error;
241: }
242:
243: /** connect
244: @param used_only_in_connect_url
1.4 paf 245: format: @b user:pass@service?
246: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 247: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 248: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
249: ORA_ENCRYPT_LOGIN=TRUE
250:
251: @todo environment manupulation doesnt look thread safe
1.1 parser 252: */
253: void connect(
254: char *used_only_in_connect_url,
255: SQL_Driver_services& services,
256: void **connection ///< output: OracleSQL_connection_struct *
257: ) {
258: // connections are cross-request, do not use services._alloc [linked with request]
259: OracleSQL_connection_struct &cs=
260: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
1.42 paf 261: cs.services=&services;
262: cs.options.bLowerCaseColumnNames = true;
1.1 parser 263:
264: char *user=used_only_in_connect_url;
265: char *service=lsplit(user, '@');
266: char *pwd=lsplit(user, ':');
1.4 paf 267: char *options=lsplit(service, '?');
1.1 parser 268:
269: if(!(user && pwd && service))
270: services._throw("mailformed connect part, must be 'user:pass@service'");
271:
1.42 paf 272: if(const char *error=options2env(options, &cs.options))
1.5 paf 273: services._throw(error);
1.4 paf 274:
1.1 parser 275: if(setjmp(cs.mark))
276: services._throw(cs.error);
277:
278: // Allocate and initialize OCIError handle, attempt #1
279: /*
280: grabbed from sample
281: /server.804/a58234/oci_func.htm#446192
282: but doc
283: /server.804/a58234/oci_func.htm#446100
284: doesnt have this param listed as allowed
285: 8.1.6 client library barks as OCI_INVALID_HANDLE
286: and debugging revealed that OCI_HTYPE_ENV param value is invalid
287: later in doc
288: /server.804/a58234/oci_func.htm#446192
289: on OCIEnvInit thay say
290: "No changes are done to an already initialized handle"
291: think, this is some sort of backward compatibility wonder.
292: leaving as it is, and without check()
293: */
294: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
295: // Initialize an environment handle, attempt #2
1.27 paf 296: check(cs, "EnvInit", OCIEnvInit(
1.1 parser 297: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
298: // Allocate and initialize OCIError handle
1.27 paf 299: check(cs, "HandleAlloc errhp", OCIHandleAlloc(
1.1 parser 300: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
301: // Allocate and initialize OCIServer handle
1.27 paf 302: check(cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.1 parser 303: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
304: // Attach to a 'service'; initialize server context handle
1.27 paf 305: check(cs, "ServerAttach", OCIServerAttach(
1.1 parser 306: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
307: // Allocate and initialize OCISvcCtx handle
1.27 paf 308: check(cs, "HandleAlloc svchp", OCIHandleAlloc(
1.1 parser 309: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
310: // set attribute server context in the service context
1.27 paf 311: check(cs, "AttrSet server-service", OCIAttrSet(
1.1 parser 312: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
313: (dvoid *)cs.srvhp, (ub4)0,
314: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
315: // allocate a user context handle
1.27 paf 316: check(cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.1 parser 317: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
318: // set 'user' name
1.27 paf 319: check(cs, "AttrSet user-session", OCIAttrSet(
1.1 parser 320: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
321: (dvoid *)user, (ub4)strlen(user),
322: OCI_ATTR_USERNAME, cs.errhp));
323: // set 'pwd' password
1.27 paf 324: check(cs, "AttrSet pwd-session", OCIAttrSet(
1.1 parser 325: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
326: (dvoid *)pwd, (ub4)strlen(pwd),
327: OCI_ATTR_PASSWORD, cs.errhp));
328: // Authenticate a user
1.27 paf 329: check(cs, "SessionBegin", OCISessionBegin(
1.1 parser 330: cs.svchp, cs.errhp, cs.usrhp,
331: OCI_CRED_RDBMS, OCI_DEFAULT));
332: // remember connection in session
1.27 paf 333: check(cs, "AttrSet service-session", OCIAttrSet(
1.1 parser 334: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
335: (dvoid *)cs.usrhp, (ub4)0,
336: OCI_ATTR_SESSION, cs.errhp));
337:
338: // return created connection
339: *(OracleSQL_connection_struct **)connection=&cs;
340: }
341: void disconnect(void *connection) {
342: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
343: // Terminate a user session
344: OCISessionEnd(
345: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
346: // Detach from a server; uninitialize server context handle
347: OCIServerDetach(
348: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
349: // Free a previously allocated handles
350: /*
351: oci will free them up as belonging to env
352: OCIHandleFree(
353: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
354: OCIHandleFree(
355: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
356: OCIHandleFree(
357: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
358: */
359: OCIHandleFree(
360: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
361:
362: // connections are cross-request, do not use services._alloc [linked with request]
363: ::free(&cs);
364: }
1.42 paf 365: void commit(void *connection) {
1.1 parser 366: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
367: if(setjmp(cs.mark))
1.42 paf 368: cs.services->_throw(cs.error);
1.1 parser 369:
1.27 paf 370: check(cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
1.1 parser 371: }
1.42 paf 372: void rollback(void *connection) {
1.1 parser 373: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
374: if(setjmp(cs.mark))
1.42 paf 375: cs.services->_throw(cs.error);
1.1 parser 376:
1.42 paf 377: // sometimes rollback is done in context when this yields error which masks previous error
378: // consider consequent errors not very important to report, reporting first one
379: /*check(cs, "rollback", */OCITransRollback(cs.svchp, cs.errhp, 0)/*)*/;
1.1 parser 380: }
381:
1.42 paf 382: bool ping(void *connection) {
1.1 parser 383: // maybe OCIServerVersion?
1.4 paf 384: // select 0 from dual
1.1 parser 385: return true;
386: }
387:
1.42 paf 388: const char* quote(void *connection,
389: const char *from, unsigned int length)
390: {
391: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
392: char *result=(char*)cs.services->malloc_atomic(length*2+1);
1.32 paf 393: char *to=result;
394: while(length--) {
395: switch(*from) {
396: case '\'': // "'" -> "''"
1.35 paf 397: *to++='\'';
1.32 paf 398: break;
1.1 parser 399: }
1.32 paf 400: *to++=*from++;
401: }
402: *to=0;
403: return result;
1.1 parser 404: }
1.42 paf 405: void query(void *connection,
1.1 parser 406: const char *astatement, unsigned long offset, unsigned long limit,
1.42 paf 407: SQL_Driver_query_event_handlers& handlers)
408: {
1.1 parser 409: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
410: OracleSQL_query_lobs lobs={{0}, 0};
411: OCIStmt *stmthp=0;
412:
1.42 paf 413: SQL_Driver_services& services=*cs.services;
414:
415: // transcode from $request:charset to connect-string?client_charset
416: size_t transcoded_statement_size;
417: if(const char* cstrClientCharset=cs.options.cstrClientCharset)
418: services.transcode(astatement, strlen(astatement),
419: astatement, transcoded_statement_size,
420: services.request_charset(),
421: cstrClientCharset);
422:
1.1 parser 423: bool failed=false;
424: if(setjmp(cs.mark)) {
425: failed=true;
426: goto cleanup;
427: } else {
1.42 paf 428: const char *statement=preprocess_statement(cs, astatement, lobs);
1.1 parser 429:
1.27 paf 430: check(cs, "HandleAlloc STMT", OCIHandleAlloc(
1.1 parser 431: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.27 paf 432: check(cs, "syntax",
1.1 parser 433: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
434: (ub4)strlen((char *)statement),
435: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
436: {
437: for(int i=0; i<lobs.count; i++) {
1.27 paf 438: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.1 parser 439: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
440:
1.27 paf 441: check(cs, "bind output", OCIBindByPos(stmthp,
1.1 parser 442: &lobs.items[i].bind, cs.errhp,
443: (ub4)1+i,
444: (dvoid *)&lobs.items[i].locator,
445: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
446: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
447:
448: lobs.items[i].rows.count=0;
1.42 paf 449: OracleSQL_query_lobs::cbf_context_struct cbf_context={&cs, &lobs.items[i].rows};
1.27 paf 450: check(cs, "bind dynamic", OCIBindDynamic(
1.1 parser 451: lobs.items[i].bind, cs.errhp,
452: (dvoid *) &cbf_context, cbf_no_data,
453: (dvoid *) &cbf_context, cbf_get_data));
454: }
455: }
456:
1.26 paf 457: execute_prepared(services, cs,
458: statement, stmthp, lobs,
459: offset, limit, handlers);
1.1 parser 460: }
461: cleanup: // no check call after this point!
462: {
463: for(int i=0; i<lobs.count; i++) {
464: /* free var locator */
465: if(OCILobLocator *locator=lobs.items[i].locator)
466: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
467:
468: /* free rows descriptors */
469: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
470: for(int r=0; r<rows.count; r++)
471: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
472: }
473: }
474: if(stmthp)
475: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
476:
1.26 paf 477: if(failed) {
1.27 paf 478: if(cs.sql_error.defined())
479: services._throw(cs.sql_error);
1.1 parser 480: services._throw(cs.error);
1.26 paf 481: }
1.1 parser 482: }
483:
484: private: // private funcs
485:
1.42 paf 486: const char *preprocess_statement(OracleSQL_connection_struct &cs,
1.1 parser 487: const char *astatement, OracleSQL_query_lobs &lobs) {
488: size_t statement_size=strlen(astatement);
1.42 paf 489: SQL_Driver_services& services=*cs.services;
1.1 parser 490:
1.32 paf 491: char *result=(char *)services.malloc_atomic(statement_size
1.1 parser 492: +MAX_STRING // in case of short 'strings'
493: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
494: +1);
495: const char *o=astatement;
496:
497: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
498: char *n=result;
499: while(*o) {
500: if(
501: o[0]=='/' &&
502: o[1]=='*' &&
503: o[2]=='*') { // name start
1.34 paf 504: const char* saved_o=o;
1.1 parser 505: o+=3;
506: const char *name_begin=o;
507: while(*o)
508: if(
509: o[0]=='*' &&
510: o[1]=='*' &&
511: o[2]=='/' &&
512: o[3]=='\'') { // name end
1.34 paf 513: saved_o=0; // found, marking that
1.1 parser 514: const char *name_end=o;
515: o+=4;
516: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
517: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
1.32 paf 518: item.data_ptr=(char *)services.malloc_atomic(statement_size/*max*/); item.data_size=0;
1.1 parser 519:
520: const char *start=o;
521: bool escaped=false;
522: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 523: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 524: if(escaped) {
525: // write pending, skip "\" or "'"
526: if(size_t size=o-start) {
527: memcpy(item.data_ptr+item.data_size, start, size);
528: item.data_size+=size;
529: }
530: start=++o;
531: } else
532: o++;
533: }
534: if(size_t size=o-start) {
535: memcpy(item.data_ptr+item.data_size, start, size);
536: item.data_size+=size;
537: }
538: if(*o)
539: o++; // skip "'"
540:
541: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
542: break;
543: } else
544: o++; // /**skip**/'xxx'
1.34 paf 545: if(saved_o) {
546: o=saved_o;
547: *n++=*o++;
548: }
1.1 parser 549: } else
550: *n++=*o++;
551: }
552: *n=0;
553:
554: if(lobs.count) {
555: int i;
556: n+=sprintf(n, " returning ");
557: for(i=0; i<lobs.count; i++) {
558: if(i)
559: *n++=',';
560: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
561: }
562: n+=sprintf(n, " into ");
563: for(i=0; i<lobs.count; i++) {
564: if(i)
1.41 paf 565: *n++=',';
1.1 parser 566: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
567: }
568: }
569:
570: return result;
571: }
572:
573: void execute_prepared(
574: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
575: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
576: unsigned long offset, unsigned long limit,
577: SQL_Driver_query_event_handlers& handlers) {
578:
579: ub2 stmt_type=0; // UNKNOWN
580: /*
581: //gpfs on sun. paf 000818
582: //Zanyway, this is needed before.
1.27 paf 583: check(cs, "get stmt type", OCIAttrGet(
1.1 parser 584: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
585: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
586: */
1.16 paf 587:
1.17 paf 588: while(isspace(*statement))
1.16 paf 589: statement++;
1.1 parser 590: if(strncasecmp(statement, "select", 6)==0)
591: stmt_type=OCI_STMT_SELECT;
592: else if(strncasecmp(statement, "insert", 6)==0)
593: stmt_type=OCI_STMT_INSERT;
594: else if(strncasecmp(statement, "update", 6)==0)
595: stmt_type=OCI_STMT_UPDATE;
596:
597: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
598: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
599: (OCISnapshot *)NULL,
600: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
601:
602: if(status!=OCI_NO_DATA)
1.27 paf 603: check(cs, "execute", status);
1.1 parser 604:
605: {
606: for(int i=0; i<lobs.count; i++)
607: if(ub4 bytes_to_write=lobs.items[i].data_size) {
608: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
609: for(int r=0; r<rows->count; r++) {
610: OCILobLocator *locator=rows->row[r].locator;
1.27 paf 611: check(cs, "lobwrite", OCILobWrite (
1.1 parser 612: cs.svchp, cs.errhp,
613: locator, &bytes_to_write, 1,
614: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
615: (dvoid *)0, 0, (ub2)0,
616: (ub1) SQLCS_IMPLICIT));
617: }
618: }
619: }
620:
621: switch(stmt_type) {
622: case OCI_STMT_SELECT:
1.42 paf 623: fetch_table(cs,
1.1 parser 624: stmthp, offset, limit,
625: handlers);
626: break;
627: default:
628: /*
629: case OCI_STMT_INSERT:
630: case OCI_STMT_UPDATE:
631: */
632: break;
633: }
634: }
635:
1.42 paf 636: void fetch_table(OracleSQL_connection_struct &cs,
1.1 parser 637: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
1.42 paf 638: SQL_Driver_query_event_handlers& handlers)
639: {
640: SQL_Driver_services& services=*cs.services;
1.12 paf 641:
1.10 paf 642: ub4 prefetch_rows=100;
1.27 paf 643: check(cs, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 644: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
645: (dvoid *)&prefetch_rows, (ub4)0,
646: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
647:
1.20 paf 648: ub4 prefetch_mem_size=100*0x400;
1.27 paf 649: check(cs, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 650: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
651: (dvoid *)&prefetch_mem_size, (ub4)0,
652: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 653:
654: OCIParam *mypard;
655: ub2 dtype;
656: text *col_name;
657:
1.40 paf 658: struct Col {
1.1 parser 659: ub2 type;
660: char *str;
661: OCILobLocator *var;
662: OCIDefine *def;
663: sb2 indicator;
664: } cols[MAX_COLS]={0};
665: int column_count=0;
666:
667: bool failed=false;
668: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
669: if(setjmp(cs.mark)) {
670: failed=true;
671: goto cleanup;
672: } else {
1.27 paf 673: // idea of preincrementing is that at error time all handles would free up
674: while(++column_count<=MAX_COLS) {
675: /* get next descriptor, if there is one */
676: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
677: (ub4) column_count)!=OCI_SUCCESS) {
678: --column_count;
679: break;
680: }
681:
682: /* Retrieve the data type attribute */
683: check(cs, "get type", OCIAttrGet(
684: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
685: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
686: (OCIError *)cs.errhp));
687:
688: /* Retrieve the column name attribute */
689: ub4 col_name_len;
690: check(cs, "get name", OCIAttrGet(
691: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
692: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
693: (OCIError *)cs.errhp));
694:
1.40 paf 695: Col& col=cols[column_count-1];
1.27 paf 696: {
1.38 paf 697: size_t length=(size_t)col_name_len;
698: char *ptr=(char *)services.malloc_atomic(length+1);
1.42 paf 699: if( cs.options.bLowerCaseColumnNames )
1.39 paf 700: tolower(ptr, (char *)col_name, length);
701: else
702: memcpy(ptr, col_name, length);
1.38 paf 703: ptr[length]=0;
704: check(cs, handlers.add_column(cs.sql_error, ptr, length));
1.27 paf 705: }
706:
707: ub2 coerce_type=dtype;
708: sb4 size=0;
709: void *ptr;
710:
711: switch(dtype) {
712: case SQLT_CLOB:
1.1 parser 713: {
1.27 paf 714: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.40 paf 715: (dvoid *)cs.envhp, (dvoid **)(ptr=&col.var),
1.27 paf 716: (ub4)OCI_DTYPE_LOB,
717: 0, (dvoid **)0));
718:
719: size=0;
1.1 parser 720: break;
721: }
1.27 paf 722: default:
723: coerce_type=SQLT_STR;
1.40 paf 724: ptr=col.str=(char *)services.malloc_atomic(MAX_OUT_STRING_LENGTH+1);
1.27 paf 725: size=MAX_OUT_STRING_LENGTH;
726: break;
1.1 parser 727: }
728:
1.40 paf 729: col.type=coerce_type;
1.1 parser 730:
1.40 paf 731: col.def=0; check(cs, "DefineByPos", OCIDefineByPos(
732: stmthp, &col.def, cs.errhp,
1.27 paf 733: column_count, (ub1 *) ptr, size,
1.40 paf 734: coerce_type, (dvoid *) &col.indicator,
1.27 paf 735: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
736: }
737:
738: check(cs, handlers.before_rows(cs.sql_error));
739:
740: for(unsigned long row=0; !limit||row<offset+limit; row++) {
741: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
742: (ub4)OCI_DEFAULT);
743: if(status==OCI_NO_DATA)
744: break;
745: check(cs, "fetch", status);
1.3 paf 746:
1.27 paf 747: if(row>=offset) {
748: check(cs, handlers.add_row(cs.sql_error));
749: for(int i=0; i<column_count; i++) {
1.37 paf 750: size_t length=0;
1.42 paf 751: char* strm=0;
1.27 paf 752: if(!cols[i].indicator) // not NULL
753: switch(cols[i].type) {
754: case SQLT_CLOB:
755: {
756: ub4 offset=1;
757: ub4 loblen=0;
758: OCILobLocator *var=(OCILobLocator *)cols[i].var;
1.42 paf 759: size_t read_size=0;
760: strm=(char*)services.malloc_atomic(1); // set type of memory block
761: do {
762: char buf[MAX_STRING*10];
763: ub4 amtp=sizeof(buf)-1;
764: status=OCILobRead(cs.svchp, cs.errhp,
765: var, &amtp, offset, (dvoid *)buf,
766: sizeof(buf),
767: (dvoid *)0, 0,
768: (ub2)0, (ub1)SQLCS_IMPLICIT);
769: if(status!=OCI_SUCCESS && status!=OCI_NEED_DATA)
770: check(cs, "lobread", status);
771:
772: strm=(char*)services.realloc(strm, read_size+amtp+1/*for zero termintator*/);
773: memcpy(strm+read_size, buf, amtp);
774: read_size+=amtp;
775: offset+=amtp;
776: } while(status==OCI_NEED_DATA);
777:
778: length=(size_t)read_size;
779: strm[length]=0;
1.1 parser 780: break;
781: }
1.27 paf 782: default:
1.32 paf 783: if(const char *value=cols[i].str) {
1.37 paf 784: length=strlen(value);
1.42 paf 785: strm=(char*)services.malloc_atomic(length+1);
786: memcpy(strm, value, length+1);
1.27 paf 787: } else {
1.37 paf 788: length=0;
1.42 paf 789: strm=0;
1.27 paf 790: }
791: break;
792: }
1.42 paf 793:
794: const char* str=strm;
795: if(str && length)
796: {
797: // transcode to $request:charset from connect-string?client_charset
1.43 paf 798: if(const char* cstrClientCharset=cs.options.cstrClientCharset) {
799: const char* dest;
800: size_t dest_length;
1.42 paf 801: services.transcode(str, length,
802: dest, dest_length,
803: cstrClientCharset,
804: services.request_charset());
1.43 paf 805: str=dest;
806: length=dest_length;
807: }
1.42 paf 808: }
809:
1.37 paf 810: check(cs, handlers.add_row_cell(cs.sql_error, str, length));
1.1 parser 811: }
812: }
813: }
814: }
815:
816: cleanup: // no check call after this point!
817: for(int i=0; i<column_count; i++) {
818: switch(cols[i].type) {
819: case SQLT_CLOB:
820: /* free var locator */
821: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
822: break;
823: default:
824: break;
825: }
826: }
827:
828: if(failed) // need rethrow?
829: longjmp(saved_mark, 1);
830: }
831:
832: private: // conn client library funcs
833:
1.27 paf 834: friend void check(OracleSQL_connection_struct &cs, const char *step, sword status);
1.1 parser 835: friend sb4 cbf_get_data(dvoid *ctxp,
836: OCIBind *bindp,
837: ub4 iter, ub4 index,
838: dvoid **bufpp,
839: ub4 **alenp,
840: ub1 *piecep,
841: dvoid **indpp,
842: ub2 **rcodepp);
843:
844:
845: #define OCI_DECL(name, params) \
846: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
847:
848: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
849: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
850: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
851: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
852:
853: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
854: size_t xtramem_sz, dvoid **usrmempp));
855:
856: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
857: dvoid *attributep, ub4 *sizep, ub4 attrtype,
858: OCIError *errhp));
859:
860: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
861: ub4 size, ub4 attrtype, OCIError *errhp));
862:
863: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
864: ub4 position, dvoid *valuep, sb4 value_sz,
865: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
866: ub4 maxarr_len, ub4 *curelep, ub4 mode));
867:
868: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
869: OCICallbackInBind icbfp, dvoid *octxp,
870: OCICallbackOutBind ocbfp));
871:
872: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
873: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
874: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
875:
876: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
877: CONST ub4 type, CONST size_t xtramem_sz,
878: dvoid **usrmempp));
879:
880: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
881:
882:
883: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
884: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
885:
886: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
887: CONST size_t xtramem_sz, dvoid **usrmempp));
888:
889: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
890:
891: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
892: OCILobLocator *locp,
893: ub4 *lenp));
894:
895: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
896: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
897: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
898: CONST dvoid *bufp,
899: ub4 len,
900: ub1 piece),
901: ub2 csid, ub1 csfrm));
902:
903: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
904: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
905: ub1 piece, dvoid *ctxp,
906: sb4 (*cbfp)(dvoid *ctxp,
907: dvoid *bufp,
908: ub4 *len,
909: ub1 *piece),
910: ub2 csid, ub1 csfrm));
911:
912: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
913: dvoid **parmdpp, ub4 pos));
914:
915: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
916: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
917:
918: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
919:
920: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
921: ub4 credt, ub4 mode));
922:
923: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
924: ub4 mode));
925:
926: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
927: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
928: OCISnapshot *snap_out, ub4 mode));
929:
930: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
931: ub2 orientation, ub4 mode));
932:
933: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
934: ub4 stmt_len, ub4 language, ub4 mode));
935:
936: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
937:
938: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
939:
940: private: // conn client library funcs linking
941:
942: const char *dlink(const char *dlopen_file_spec) {
943: if(lt_dlinit())
944: return lt_dlerror();
945: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
946: if(!handle)
947: return lt_dlerror(); //"can not open the dynamic link module";
948:
949: #define DSLINK(name, action) \
950: name=(t_##name)lt_dlsym(handle, #name); \
951: if(!name) \
952: action;
953:
954: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
955:
956: OCI_LINK(Initialize);
957: OCI_LINK(EnvInit);
958: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
959: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
960: OCI_LINK(DefineByPos);
961: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
962: OCI_LINK(ErrorGet);
963: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
964: OCI_LINK(LobGetLength);
965: OCI_LINK(LobRead); OCI_LINK(LobWrite);
966: OCI_LINK(ParamGet);
967: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
968: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
969: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
970: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
971:
972: return 0;
973: }
974:
975: } *OracleSQL_driver;
976:
1.27 paf 977: void check(OracleSQL_connection_struct &cs, const char *step, sword status) {
1.1 parser 978:
979: const char *msg;
980: char reason[MAX_STRING/2];
981:
1.21 paf 982: const char *prefix="ERROR";
1.1 parser 983: switch (status) {
1.22 paf 984: case OCI_SUCCESS: // hurrah
985: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
986: // count() not counting them and gives that status
987: return;
1.1 parser 988: case OCI_ERROR:
989: {
990: sb4 errcode;
991: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
992: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
993: msg=reason;
1.42 paf 994:
995: // transcode to $request:charset from connect-string?client_charset
996: if(const char* cstrClientCharset=cs.options.cstrClientCharset)
997: if(msg) {
998: if(size_t msg_length=strlen(msg)) {
999: cs.services->transcode(msg, msg_length,
1000: msg, msg_length,
1001: cstrClientCharset,
1002: cs.services->request_charset());
1003: }
1004: }
1.1 parser 1005: else
1006: msg="[can not get error description]";
1007: break;
1008: }
1009: case OCI_NEED_DATA:
1010: msg="NEED_DATA"; break;
1011: case OCI_NO_DATA:
1012: msg="NODATA"; break;
1013: case OCI_INVALID_HANDLE:
1014: msg="INVALID_HANDLE"; break;
1015: case OCI_STILL_EXECUTING:
1016: msg="STILL_EXECUTE"; break;
1017: case OCI_CONTINUE:
1018: msg="CONTINUE"; break;
1019: default:
1020: msg="unknown"; break;
1021: }
1022:
1.22 paf 1023: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
1024: msg, step, (int)status);
1.1 parser 1025: longjmp(cs.mark, 1);
1026: }
1027:
1.27 paf 1028: void check(OracleSQL_connection_struct &cs, bool error) {
1029: if(error)
1030: longjmp(cs.mark, 1);
1031: }
1.1 parser 1032:
1033: /* ----------------------------------------------------------------- */
1034: /* Intbind callback that does not do any data input. */
1035: /* ----------------------------------------------------------------- */
1036: static sb4 cbf_no_data(
1037: dvoid *ctxp,
1038: OCIBind *bindp,
1039: ub4 iter, ub4 index,
1040: dvoid **bufpp,
1041: ub4 *alenpp,
1042: ub1 *piecep,
1043: dvoid **indpp) {
1044: *bufpp=(dvoid *)0;
1045: *alenpp=0;
1046: static sb2 null_ind=-1;
1047: *indpp=(dvoid *) &null_ind;
1048: *piecep=OCI_ONE_PIECE;
1049:
1050: return OCI_CONTINUE;
1051: }
1052:
1053: /* ----------------------------------------------------------------- */
1054: /* Outbind callback for returning data. */
1055: /* ----------------------------------------------------------------- */
1056: static sb4 cbf_get_data(dvoid *ctxp,
1057: OCIBind *bindp,
1058: ub4 iter, ub4 index,
1059: dvoid **bufpp,
1060: ub4 **alenp,
1061: ub1 *piecep,
1062: dvoid **indpp,
1063: ub2 **rcodepp) {
1064: OracleSQL_query_lobs::cbf_context_struct &context=
1065: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
1066:
1067: if(index==0) {
1068: static ub4 rows;
1.27 paf 1069: check(*context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 1070: OracleSQL_driver->OCIAttrGet(
1071: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
1072: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1073: context.rows->count=(ub2)rows;
1074: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1.42 paf 1075: context.cs->services->malloc_atomic(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1.1 parser 1076: }
1077:
1078: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1079:
1.27 paf 1080: check(*context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 1081: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1082: (ub4)OCI_DTYPE_LOB,
1083: 0, (dvoid **)0));
1084:
1085: *bufpp=var.locator;
1086: *alenp=&var.len;
1087: *indpp=(dvoid *) &var.ind;
1088: *piecep=OCI_ONE_PIECE;
1089: *rcodepp=&var.rcode;
1090:
1091: return OCI_CONTINUE;
1092: }
1093:
1.38 paf 1094: void tolower(char *out, const char *in, size_t size) {
1095: while(size--)
1096: *out++=tolower(*in++);
1.1 parser 1097: }
1.44 ! paf 1098: void toupper(char *out, const char *in, size_t size) {
! 1099: while(size--)
! 1100: *out++=toupper(*in++);
! 1101: }
! 1102:
1.1 parser 1103:
1104: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1105: return OracleSQL_driver=new OracleSQL_Driver();
1106: }