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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: */
1.45 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.44 2003/12/23 11:52:37 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:
1.45 ! paf 41: #if _MSC_VER
! 42: // interaction between '_setjmp' and C++ object destruction is non-portable
! 43: // but we forced to do that under HPUX
! 44: #pragma warning(disable:4611)
! 45: #endif
! 46:
1.33 paf 47: /// @todo small memory leaks here
1.10 paf 48: static int pa_setenv(const char *name, const char *value, bool do_append) {
49: const char *prev_value=0;
50: if(do_append)
51: prev_value=getenv(name);
1.4 paf 52: #ifdef HAVE_PUTENV
53: // MEM_LEAK_HERE. refer to EOF man putenv
1.10 paf 54: char *buf=(char *)::malloc(strlen(name)
55: +1
56: +(prev_value?strlen(prev_value):0)
57: +strlen(value)
58: +1);
1.4 paf 59: strcpy(buf, name);
60: strcat(buf, "=");
1.10 paf 61: if(prev_value)
62: strcat(buf, prev_value);
1.4 paf 63: strcat(buf, value);
1.5 paf 64: /*
65: if(FILE *f=fopen("f", "at")) {
66: fprintf(f, "****************************%s\n", buf);
67: // for (char **env = environ; env != NULL && *env != NULL; env++)
68: // fputs(*env, f);
69:
70: fclose(f);
71: }
72: */
1.4 paf 73: return putenv(buf);
74: #else
75: //#ifdef HAVE_SETENV
1.10 paf 76: if(value) {
77: if(prev_value) {
78: // MEM_LEAK_HERE
1.33 paf 79: char *buf=(char *)::malloc(strlen(prev_value)
1.10 paf 80: +strlen(value)
81: +1);
82: strcpy(buf, prev_value);
83: strcat(buf, value);
1.24 paf 84: value=buf;
85: }
1.10 paf 86:
1.24 paf 87: return setenv(name, value, 1/*overwrite*/);
1.10 paf 88: } else {
1.4 paf 89: unsetenv(name);
90: return 0;
91: }
92: #endif
93: }
94:
1.1 parser 95: static char *lsplit(char *string, char delim) {
96: if(string) {
97: char *v=strchr(string, delim);
98: if(v) {
99: *v=0;
100: return v+1;
101: }
102: }
103: return 0;
104: }
105:
1.4 paf 106: static char *lsplit(char **string_ref, char delim) {
107: char *result=*string_ref;
108: char *next=lsplit(*string_ref, delim);
109: *string_ref=next;
110: return result;
111: }
112:
1.1 parser 113: #ifndef DOXYGEN
114: struct OracleSQL_connection_struct {
1.42 paf 115: SQL_Driver_services *services;
116:
1.1 parser 117: jmp_buf mark; char error[MAX_STRING];
1.27 paf 118: SQL_Error sql_error;
1.1 parser 119: OCIEnv *envhp;
120: OCIServer *srvhp;
121: OCIError *errhp;
122: OCISvcCtx *svchp;
123: OCISession *usrhp;
1.39 paf 124:
1.42 paf 125: struct Options {
126: bool bLowerCaseColumnNames;
127: const char* cstrClientCharset;
128: } options;
1.1 parser 129: };
130:
131: struct OracleSQL_query_lobs {
132: struct return_rows {
133: struct return_row {
134: OCILobLocator *locator; ub4 len;
135: int ind;
136: ub2 rcode;
137: } *row;
138: int count;
139: };
140: struct cbf_context_struct {
141: OracleSQL_connection_struct *cs;
142: return_rows *rows;
143: };
144: struct Item {
145: const char *name_ptr; size_t name_size;
146: char *data_ptr; size_t data_size;
147: OCILobLocator *locator;
148: OCIBind *bind;
149: return_rows rows;
150: } items[MAX_IN_LOBS];
151: int count;
152: };
153: #endif
154:
155: // forwards
1.27 paf 156: void check(OracleSQL_connection_struct &cs, const char *step, sword status);
157: void check(OracleSQL_connection_struct &cs, bool error);
1.1 parser 158: static sb4 cbf_no_data(
159: dvoid *ctxp,
160: OCIBind *bindp,
161: ub4 iter, ub4 index,
162: dvoid **bufpp,
163: ub4 *alenpp,
164: ub1 *piecep,
165: dvoid **indpp);
166: static sb4 cbf_get_data(dvoid *ctxp,
167: OCIBind *bindp,
168: ub4 iter, ub4 index,
169: dvoid **bufpp,
170: ub4 **alenp,
171: ub1 *piecep,
172: dvoid **indpp,
173: ub2 **rcodepp);
1.38 paf 174: void tolower(char *out, const char *in, size_t size);
1.44 paf 175: void toupper(char *out, const char *in, size_t size);
1.1 parser 176:
1.42 paf 177: static const char *options2env(char *s, OracleSQL_connection_struct::Options* options) {
178: while(s) {
179: if(char *key=lsplit(&s, '&')) {
180: if(*key) {
181: if(char *value=lsplit(key, '=')) {
182: if( strcmp( key, "ClientCharset" ) == 0 ) {
1.44 paf 183: if(options) {
184: toupper(value, value, strlen(value));
1.42 paf 185: options->cstrClientCharset = value;
1.44 paf 186: }
1.42 paf 187: continue;
188: }
189:
190: if( strcmp( key, "LowerCaseColumnNames" ) == 0 ) {
191: if(options)
192: options->bLowerCaseColumnNames = atoi(value)!=0;
193: continue;
194: }
195:
196: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
197: if(do_append)
198: key[strlen(key)-1]=0; // remove trailing +
199: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
200: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
201: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
202: || do_append
203: ) {
204: if(pa_setenv(key, value, do_append)!=0)
205: return "problem changing process environment" /*key*/;
206: } else
207: return "unknown option" /*key*/;
208: } else
209: return "option without =value" /*key*/;
210: }
211: }
212: }
213: return 0;
214: }
215:
1.1 parser 216: /**
217: OracleSQL server driver
218: */
219: class OracleSQL_Driver : public SQL_Driver {
220: public:
221:
222: OracleSQL_Driver() : SQL_Driver() {
223: }
224:
225: /// get api version
226: int api_version() { return SQL_DRIVER_API_VERSION; }
1.6 paf 227: /** initialize driver by loading sql dynamic link library
228: @todo ?objects=1 which would turn on OCI_OBJECT init flag
229: */
1.5 paf 230: const char *initialize(char *dlopen_file_spec) {
231: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 232:
233: const char *error=dlopen_file_spec?
234: dlink(dlopen_file_spec):"client library column is empty";
235: if(!error) {
1.39 paf 236: error=options2env(options, 0);
1.1 parser 237:
1.5 paf 238: if(!error)
239: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
240: (dvoid * (*)(void *, unsigned int))0,
241: (dvoid * (*)(void*, void*, unsigned int))0,
242: (void (*)(void*, void*))0
243: );
1.1 parser 244: }
245:
246: return error;
247: }
248:
249: /** connect
250: @param used_only_in_connect_url
1.4 paf 251: format: @b user:pass@service?
252: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 paf 253: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 254: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
255: ORA_ENCRYPT_LOGIN=TRUE
256:
257: @todo environment manupulation doesnt look thread safe
1.1 parser 258: */
259: void connect(
260: char *used_only_in_connect_url,
261: SQL_Driver_services& services,
262: void **connection ///< output: OracleSQL_connection_struct *
263: ) {
264: // connections are cross-request, do not use services._alloc [linked with request]
265: OracleSQL_connection_struct &cs=
266: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
1.42 paf 267: cs.services=&services;
268: cs.options.bLowerCaseColumnNames = true;
1.1 parser 269:
270: char *user=used_only_in_connect_url;
271: char *service=lsplit(user, '@');
272: char *pwd=lsplit(user, ':');
1.4 paf 273: char *options=lsplit(service, '?');
1.1 parser 274:
275: if(!(user && pwd && service))
276: services._throw("mailformed connect part, must be 'user:pass@service'");
277:
1.42 paf 278: if(const char *error=options2env(options, &cs.options))
1.5 paf 279: services._throw(error);
1.4 paf 280:
1.1 parser 281: if(setjmp(cs.mark))
282: services._throw(cs.error);
283:
284: // Allocate and initialize OCIError handle, attempt #1
285: /*
286: grabbed from sample
287: /server.804/a58234/oci_func.htm#446192
288: but doc
289: /server.804/a58234/oci_func.htm#446100
290: doesnt have this param listed as allowed
291: 8.1.6 client library barks as OCI_INVALID_HANDLE
292: and debugging revealed that OCI_HTYPE_ENV param value is invalid
293: later in doc
294: /server.804/a58234/oci_func.htm#446192
295: on OCIEnvInit thay say
296: "No changes are done to an already initialized handle"
297: think, this is some sort of backward compatibility wonder.
298: leaving as it is, and without check()
299: */
300: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
301: // Initialize an environment handle, attempt #2
1.27 paf 302: check(cs, "EnvInit", OCIEnvInit(
1.1 parser 303: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
304: // Allocate and initialize OCIError handle
1.27 paf 305: check(cs, "HandleAlloc errhp", OCIHandleAlloc(
1.1 parser 306: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
307: // Allocate and initialize OCIServer handle
1.27 paf 308: check(cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.1 parser 309: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
310: // Attach to a 'service'; initialize server context handle
1.27 paf 311: check(cs, "ServerAttach", OCIServerAttach(
1.1 parser 312: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
313: // Allocate and initialize OCISvcCtx handle
1.27 paf 314: check(cs, "HandleAlloc svchp", OCIHandleAlloc(
1.1 parser 315: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
316: // set attribute server context in the service context
1.27 paf 317: check(cs, "AttrSet server-service", OCIAttrSet(
1.1 parser 318: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
319: (dvoid *)cs.srvhp, (ub4)0,
320: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
321: // allocate a user context handle
1.27 paf 322: check(cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.1 parser 323: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
324: // set 'user' name
1.27 paf 325: check(cs, "AttrSet user-session", OCIAttrSet(
1.1 parser 326: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
327: (dvoid *)user, (ub4)strlen(user),
328: OCI_ATTR_USERNAME, cs.errhp));
329: // set 'pwd' password
1.27 paf 330: check(cs, "AttrSet pwd-session", OCIAttrSet(
1.1 parser 331: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
332: (dvoid *)pwd, (ub4)strlen(pwd),
333: OCI_ATTR_PASSWORD, cs.errhp));
334: // Authenticate a user
1.27 paf 335: check(cs, "SessionBegin", OCISessionBegin(
1.1 parser 336: cs.svchp, cs.errhp, cs.usrhp,
337: OCI_CRED_RDBMS, OCI_DEFAULT));
338: // remember connection in session
1.27 paf 339: check(cs, "AttrSet service-session", OCIAttrSet(
1.1 parser 340: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
341: (dvoid *)cs.usrhp, (ub4)0,
342: OCI_ATTR_SESSION, cs.errhp));
343:
344: // return created connection
345: *(OracleSQL_connection_struct **)connection=&cs;
346: }
347: void disconnect(void *connection) {
348: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
349: // Terminate a user session
350: OCISessionEnd(
351: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
352: // Detach from a server; uninitialize server context handle
353: OCIServerDetach(
354: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
355: // Free a previously allocated handles
356: /*
357: oci will free them up as belonging to env
358: OCIHandleFree(
359: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
360: OCIHandleFree(
361: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
362: OCIHandleFree(
363: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
364: */
365: OCIHandleFree(
366: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
367:
368: // connections are cross-request, do not use services._alloc [linked with request]
369: ::free(&cs);
370: }
1.42 paf 371: void commit(void *connection) {
1.1 parser 372: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
373: if(setjmp(cs.mark))
1.42 paf 374: cs.services->_throw(cs.error);
1.1 parser 375:
1.27 paf 376: check(cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
1.1 parser 377: }
1.42 paf 378: void rollback(void *connection) {
1.1 parser 379: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
380: if(setjmp(cs.mark))
1.42 paf 381: cs.services->_throw(cs.error);
1.1 parser 382:
1.42 paf 383: // sometimes rollback is done in context when this yields error which masks previous error
384: // consider consequent errors not very important to report, reporting first one
385: /*check(cs, "rollback", */OCITransRollback(cs.svchp, cs.errhp, 0)/*)*/;
1.1 parser 386: }
387:
1.45 ! paf 388: bool ping(void* /*connection*/) {
1.1 parser 389: // maybe OCIServerVersion?
1.4 paf 390: // select 0 from dual
1.1 parser 391: return true;
392: }
393:
1.42 paf 394: const char* quote(void *connection,
395: const char *from, unsigned int length)
396: {
397: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
398: char *result=(char*)cs.services->malloc_atomic(length*2+1);
1.32 paf 399: char *to=result;
400: while(length--) {
401: switch(*from) {
402: case '\'': // "'" -> "''"
1.35 paf 403: *to++='\'';
1.32 paf 404: break;
1.1 parser 405: }
1.32 paf 406: *to++=*from++;
407: }
408: *to=0;
409: return result;
1.1 parser 410: }
1.42 paf 411: void query(void *connection,
1.1 parser 412: const char *astatement, unsigned long offset, unsigned long limit,
1.42 paf 413: SQL_Driver_query_event_handlers& handlers)
414: {
1.1 parser 415: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
416: OracleSQL_query_lobs lobs={{0}, 0};
417: OCIStmt *stmthp=0;
418:
1.42 paf 419: SQL_Driver_services& services=*cs.services;
420:
421: // transcode from $request:charset to connect-string?client_charset
422: size_t transcoded_statement_size;
423: if(const char* cstrClientCharset=cs.options.cstrClientCharset)
424: services.transcode(astatement, strlen(astatement),
425: astatement, transcoded_statement_size,
426: services.request_charset(),
427: cstrClientCharset);
428:
1.1 parser 429: bool failed=false;
430: if(setjmp(cs.mark)) {
431: failed=true;
432: goto cleanup;
433: } else {
1.42 paf 434: const char *statement=preprocess_statement(cs, astatement, lobs);
1.1 parser 435:
1.27 paf 436: check(cs, "HandleAlloc STMT", OCIHandleAlloc(
1.1 parser 437: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.27 paf 438: check(cs, "syntax",
1.1 parser 439: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
440: (ub4)strlen((char *)statement),
441: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
442: {
443: for(int i=0; i<lobs.count; i++) {
1.27 paf 444: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.1 parser 445: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
446:
1.27 paf 447: check(cs, "bind output", OCIBindByPos(stmthp,
1.1 parser 448: &lobs.items[i].bind, cs.errhp,
449: (ub4)1+i,
450: (dvoid *)&lobs.items[i].locator,
451: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
452: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
453:
454: lobs.items[i].rows.count=0;
1.42 paf 455: OracleSQL_query_lobs::cbf_context_struct cbf_context={&cs, &lobs.items[i].rows};
1.27 paf 456: check(cs, "bind dynamic", OCIBindDynamic(
1.1 parser 457: lobs.items[i].bind, cs.errhp,
458: (dvoid *) &cbf_context, cbf_no_data,
459: (dvoid *) &cbf_context, cbf_get_data));
460: }
461: }
462:
1.45 ! paf 463: execute_prepared(cs,
1.26 paf 464: statement, stmthp, lobs,
465: offset, limit, handlers);
1.1 parser 466: }
467: cleanup: // no check call after this point!
468: {
469: for(int i=0; i<lobs.count; i++) {
470: /* free var locator */
471: if(OCILobLocator *locator=lobs.items[i].locator)
472: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
473:
474: /* free rows descriptors */
475: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
476: for(int r=0; r<rows.count; r++)
477: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
478: }
479: }
480: if(stmthp)
481: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
482:
1.26 paf 483: if(failed) {
1.27 paf 484: if(cs.sql_error.defined())
485: services._throw(cs.sql_error);
1.1 parser 486: services._throw(cs.error);
1.26 paf 487: }
1.1 parser 488: }
489:
490: private: // private funcs
491:
1.42 paf 492: const char *preprocess_statement(OracleSQL_connection_struct &cs,
1.1 parser 493: const char *astatement, OracleSQL_query_lobs &lobs) {
494: size_t statement_size=strlen(astatement);
1.42 paf 495: SQL_Driver_services& services=*cs.services;
1.1 parser 496:
1.32 paf 497: char *result=(char *)services.malloc_atomic(statement_size
1.1 parser 498: +MAX_STRING // in case of short 'strings'
499: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
500: +1);
501: const char *o=astatement;
502:
503: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
504: char *n=result;
505: while(*o) {
506: if(
507: o[0]=='/' &&
508: o[1]=='*' &&
509: o[2]=='*') { // name start
1.34 paf 510: const char* saved_o=o;
1.1 parser 511: o+=3;
512: const char *name_begin=o;
513: while(*o)
514: if(
515: o[0]=='*' &&
516: o[1]=='*' &&
517: o[2]=='/' &&
518: o[3]=='\'') { // name end
1.34 paf 519: saved_o=0; // found, marking that
1.1 parser 520: const char *name_end=o;
521: o+=4;
522: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
523: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
1.32 paf 524: item.data_ptr=(char *)services.malloc_atomic(statement_size/*max*/); item.data_size=0;
1.1 parser 525:
526: const char *start=o;
527: bool escaped=false;
528: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.14 paf 529: escaped=o[0]=='\'' && o[1]=='\'';
1.1 parser 530: if(escaped) {
531: // write pending, skip "\" or "'"
532: if(size_t size=o-start) {
533: memcpy(item.data_ptr+item.data_size, start, size);
534: item.data_size+=size;
535: }
536: start=++o;
537: } else
538: o++;
539: }
540: if(size_t size=o-start) {
541: memcpy(item.data_ptr+item.data_size, start, size);
542: item.data_size+=size;
543: }
544: if(*o)
545: o++; // skip "'"
546:
547: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
548: break;
549: } else
550: o++; // /**skip**/'xxx'
1.34 paf 551: if(saved_o) {
552: o=saved_o;
553: *n++=*o++;
554: }
1.1 parser 555: } else
556: *n++=*o++;
557: }
558: *n=0;
559:
560: if(lobs.count) {
561: int i;
562: n+=sprintf(n, " returning ");
563: for(i=0; i<lobs.count; i++) {
564: if(i)
565: *n++=',';
566: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
567: }
568: n+=sprintf(n, " into ");
569: for(i=0; i<lobs.count; i++) {
570: if(i)
1.41 paf 571: *n++=',';
1.1 parser 572: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
573: }
574: }
575:
576: return result;
577: }
578:
579: void execute_prepared(
1.45 ! paf 580: OracleSQL_connection_struct &cs,
1.1 parser 581: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
582: unsigned long offset, unsigned long limit,
583: SQL_Driver_query_event_handlers& handlers) {
584:
585: ub2 stmt_type=0; // UNKNOWN
586: /*
587: //gpfs on sun. paf 000818
588: //Zanyway, this is needed before.
1.27 paf 589: check(cs, "get stmt type", OCIAttrGet(
1.1 parser 590: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
591: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
592: */
1.16 paf 593:
1.17 paf 594: while(isspace(*statement))
1.16 paf 595: statement++;
1.1 parser 596: if(strncasecmp(statement, "select", 6)==0)
597: stmt_type=OCI_STMT_SELECT;
598: else if(strncasecmp(statement, "insert", 6)==0)
599: stmt_type=OCI_STMT_INSERT;
600: else if(strncasecmp(statement, "update", 6)==0)
601: stmt_type=OCI_STMT_UPDATE;
602:
603: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
604: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
605: (OCISnapshot *)NULL,
606: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
607:
608: if(status!=OCI_NO_DATA)
1.27 paf 609: check(cs, "execute", status);
1.1 parser 610:
611: {
612: for(int i=0; i<lobs.count; i++)
613: if(ub4 bytes_to_write=lobs.items[i].data_size) {
614: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
615: for(int r=0; r<rows->count; r++) {
616: OCILobLocator *locator=rows->row[r].locator;
1.27 paf 617: check(cs, "lobwrite", OCILobWrite (
1.1 parser 618: cs.svchp, cs.errhp,
619: locator, &bytes_to_write, 1,
620: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
621: (dvoid *)0, 0, (ub2)0,
622: (ub1) SQLCS_IMPLICIT));
623: }
624: }
625: }
626:
627: switch(stmt_type) {
628: case OCI_STMT_SELECT:
1.42 paf 629: fetch_table(cs,
1.1 parser 630: stmthp, offset, limit,
631: handlers);
632: break;
633: default:
634: /*
635: case OCI_STMT_INSERT:
636: case OCI_STMT_UPDATE:
637: */
638: break;
639: }
640: }
641:
1.42 paf 642: void fetch_table(OracleSQL_connection_struct &cs,
1.1 parser 643: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
1.42 paf 644: SQL_Driver_query_event_handlers& handlers)
645: {
646: SQL_Driver_services& services=*cs.services;
1.12 paf 647:
1.10 paf 648: ub4 prefetch_rows=100;
1.27 paf 649: check(cs, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 650: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
651: (dvoid *)&prefetch_rows, (ub4)0,
652: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)cs.errhp));
653:
1.20 paf 654: ub4 prefetch_mem_size=100*0x400;
1.27 paf 655: check(cs, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 656: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
657: (dvoid *)&prefetch_mem_size, (ub4)0,
658: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)cs.errhp));
1.1 parser 659:
660: OCIParam *mypard;
661: ub2 dtype;
662: text *col_name;
663:
1.40 paf 664: struct Col {
1.1 parser 665: ub2 type;
666: char *str;
667: OCILobLocator *var;
668: OCIDefine *def;
669: sb2 indicator;
670: } cols[MAX_COLS]={0};
671: int column_count=0;
672:
673: bool failed=false;
674: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
675: if(setjmp(cs.mark)) {
676: failed=true;
677: goto cleanup;
678: } else {
1.27 paf 679: // idea of preincrementing is that at error time all handles would free up
680: while(++column_count<=MAX_COLS) {
681: /* get next descriptor, if there is one */
682: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
683: (ub4) column_count)!=OCI_SUCCESS) {
684: --column_count;
685: break;
686: }
687:
688: /* Retrieve the data type attribute */
689: check(cs, "get type", OCIAttrGet(
690: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
691: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
692: (OCIError *)cs.errhp));
693:
694: /* Retrieve the column name attribute */
695: ub4 col_name_len;
696: check(cs, "get name", OCIAttrGet(
697: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
698: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
699: (OCIError *)cs.errhp));
700:
1.40 paf 701: Col& col=cols[column_count-1];
1.27 paf 702: {
1.38 paf 703: size_t length=(size_t)col_name_len;
704: char *ptr=(char *)services.malloc_atomic(length+1);
1.42 paf 705: if( cs.options.bLowerCaseColumnNames )
1.39 paf 706: tolower(ptr, (char *)col_name, length);
707: else
708: memcpy(ptr, col_name, length);
1.38 paf 709: ptr[length]=0;
710: check(cs, handlers.add_column(cs.sql_error, ptr, length));
1.27 paf 711: }
712:
713: ub2 coerce_type=dtype;
714: sb4 size=0;
715: void *ptr;
716:
717: switch(dtype) {
718: case SQLT_CLOB:
1.1 parser 719: {
1.27 paf 720: check(cs, "alloc output var desc", OCIDescriptorAlloc(
1.40 paf 721: (dvoid *)cs.envhp, (dvoid **)(ptr=&col.var),
1.27 paf 722: (ub4)OCI_DTYPE_LOB,
723: 0, (dvoid **)0));
724:
725: size=0;
1.1 parser 726: break;
727: }
1.27 paf 728: default:
729: coerce_type=SQLT_STR;
1.40 paf 730: ptr=col.str=(char *)services.malloc_atomic(MAX_OUT_STRING_LENGTH+1);
1.27 paf 731: size=MAX_OUT_STRING_LENGTH;
732: break;
1.1 parser 733: }
734:
1.40 paf 735: col.type=coerce_type;
1.1 parser 736:
1.40 paf 737: col.def=0; check(cs, "DefineByPos", OCIDefineByPos(
738: stmthp, &col.def, cs.errhp,
1.27 paf 739: column_count, (ub1 *) ptr, size,
1.40 paf 740: coerce_type, (dvoid *) &col.indicator,
1.27 paf 741: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
742: }
743:
744: check(cs, handlers.before_rows(cs.sql_error));
745:
746: for(unsigned long row=0; !limit||row<offset+limit; row++) {
747: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
748: (ub4)OCI_DEFAULT);
749: if(status==OCI_NO_DATA)
750: break;
751: check(cs, "fetch", status);
1.3 paf 752:
1.27 paf 753: if(row>=offset) {
754: check(cs, handlers.add_row(cs.sql_error));
755: for(int i=0; i<column_count; i++) {
1.37 paf 756: size_t length=0;
1.42 paf 757: char* strm=0;
1.27 paf 758: if(!cols[i].indicator) // not NULL
759: switch(cols[i].type) {
760: case SQLT_CLOB:
761: {
762: ub4 offset=1;
763: OCILobLocator *var=(OCILobLocator *)cols[i].var;
1.42 paf 764: size_t read_size=0;
1.45 ! paf 765: strm=(char*)services.malloc_atomic(1/*for terminator*/); // set type of memory block
1.42 paf 766: do {
767: char buf[MAX_STRING*10];
1.45 ! paf 768: ub4 amtp=0/*to be read in stream mode*/;
! 769: // http://i/docs/oracle/server.804/a58234/oci_func.htm#427818
1.42 paf 770: status=OCILobRead(cs.svchp, cs.errhp,
771: var, &amtp, offset, (dvoid *)buf,
772: sizeof(buf),
773: (dvoid *)0, 0,
774: (ub2)0, (ub1)SQLCS_IMPLICIT);
775: if(status!=OCI_SUCCESS && status!=OCI_NEED_DATA)
776: check(cs, "lobread", status);
777:
1.45 ! paf 778: strm=(char*)services.realloc(strm, read_size+amtp+1/*for termintator*/);
1.42 paf 779: memcpy(strm+read_size, buf, amtp);
780: read_size+=amtp;
781: offset+=amtp;
782: } while(status==OCI_NEED_DATA);
783:
784: length=(size_t)read_size;
785: strm[length]=0;
1.1 parser 786: break;
787: }
1.27 paf 788: default:
1.32 paf 789: if(const char *value=cols[i].str) {
1.37 paf 790: length=strlen(value);
1.42 paf 791: strm=(char*)services.malloc_atomic(length+1);
792: memcpy(strm, value, length+1);
1.27 paf 793: } else {
1.37 paf 794: length=0;
1.42 paf 795: strm=0;
1.27 paf 796: }
797: break;
798: }
1.42 paf 799:
800: const char* str=strm;
801: if(str && length)
802: {
803: // transcode to $request:charset from connect-string?client_charset
1.43 paf 804: if(const char* cstrClientCharset=cs.options.cstrClientCharset) {
805: const char* dest;
806: size_t dest_length;
1.42 paf 807: services.transcode(str, length,
808: dest, dest_length,
809: cstrClientCharset,
810: services.request_charset());
1.43 paf 811: str=dest;
812: length=dest_length;
813: }
1.42 paf 814: }
815:
1.37 paf 816: check(cs, handlers.add_row_cell(cs.sql_error, str, length));
1.1 parser 817: }
818: }
819: }
820: }
821:
822: cleanup: // no check call after this point!
823: for(int i=0; i<column_count; i++) {
824: switch(cols[i].type) {
825: case SQLT_CLOB:
826: /* free var locator */
827: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
828: break;
829: default:
830: break;
831: }
832: }
833:
834: if(failed) // need rethrow?
835: longjmp(saved_mark, 1);
836: }
837:
838: private: // conn client library funcs
839:
1.27 paf 840: friend void check(OracleSQL_connection_struct &cs, const char *step, sword status);
1.1 parser 841: friend sb4 cbf_get_data(dvoid *ctxp,
842: OCIBind *bindp,
843: ub4 iter, ub4 index,
844: dvoid **bufpp,
845: ub4 **alenp,
846: ub1 *piecep,
847: dvoid **indpp,
848: ub2 **rcodepp);
849:
850:
851: #define OCI_DECL(name, params) \
852: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
853:
854: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
855: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
856: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
857: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
858:
859: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
860: size_t xtramem_sz, dvoid **usrmempp));
861:
862: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
863: dvoid *attributep, ub4 *sizep, ub4 attrtype,
864: OCIError *errhp));
865:
866: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
867: ub4 size, ub4 attrtype, OCIError *errhp));
868:
869: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
870: ub4 position, dvoid *valuep, sb4 value_sz,
871: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
872: ub4 maxarr_len, ub4 *curelep, ub4 mode));
873:
874: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
875: OCICallbackInBind icbfp, dvoid *octxp,
876: OCICallbackOutBind ocbfp));
877:
878: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
879: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
880: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
881:
882: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
883: CONST ub4 type, CONST size_t xtramem_sz,
884: dvoid **usrmempp));
885:
886: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
887:
888:
889: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
890: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
891:
892: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
893: CONST size_t xtramem_sz, dvoid **usrmempp));
894:
895: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
896:
897: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
898: OCILobLocator *locp,
899: ub4 *lenp));
900:
901: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
902: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
903: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
904: CONST dvoid *bufp,
905: ub4 len,
906: ub1 piece),
907: ub2 csid, ub1 csfrm));
908:
909: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
910: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
911: ub1 piece, dvoid *ctxp,
912: sb4 (*cbfp)(dvoid *ctxp,
913: dvoid *bufp,
914: ub4 *len,
915: ub1 *piece),
916: ub2 csid, ub1 csfrm));
917:
918: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
919: dvoid **parmdpp, ub4 pos));
920:
921: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
922: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
923:
924: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
925:
926: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
927: ub4 credt, ub4 mode));
928:
929: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
930: ub4 mode));
931:
932: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
933: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
934: OCISnapshot *snap_out, ub4 mode));
935:
936: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
937: ub2 orientation, ub4 mode));
938:
939: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
940: ub4 stmt_len, ub4 language, ub4 mode));
941:
942: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
943:
944: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
945:
946: private: // conn client library funcs linking
947:
948: const char *dlink(const char *dlopen_file_spec) {
949: if(lt_dlinit())
950: return lt_dlerror();
951: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
952: if(!handle)
953: return lt_dlerror(); //"can not open the dynamic link module";
954:
955: #define DSLINK(name, action) \
956: name=(t_##name)lt_dlsym(handle, #name); \
957: if(!name) \
958: action;
959:
960: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
961:
962: OCI_LINK(Initialize);
963: OCI_LINK(EnvInit);
964: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
965: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
966: OCI_LINK(DefineByPos);
967: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
968: OCI_LINK(ErrorGet);
969: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
970: OCI_LINK(LobGetLength);
971: OCI_LINK(LobRead); OCI_LINK(LobWrite);
972: OCI_LINK(ParamGet);
973: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
974: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
975: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
976: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
977:
978: return 0;
979: }
980:
981: } *OracleSQL_driver;
982:
1.27 paf 983: void check(OracleSQL_connection_struct &cs, const char *step, sword status) {
1.1 parser 984:
985: const char *msg;
986: char reason[MAX_STRING/2];
987:
988: switch (status) {
1.22 paf 989: case OCI_SUCCESS: // hurrah
990: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
991: // count() not counting them and gives that status
992: return;
1.1 parser 993: case OCI_ERROR:
994: {
1.45 ! paf 995: sb4 errcode;
! 996: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
! 997: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS) {
! 998: msg=reason;
! 999:
! 1000: // transcode to $request:charset from connect-string?client_charset
! 1001: if(const char* cstrClientCharset=cs.options.cstrClientCharset) {
! 1002: if(msg) {
! 1003: if(size_t msg_length=strlen(msg)) {
! 1004: cs.services->transcode(msg, msg_length,
! 1005: msg, msg_length,
! 1006: cstrClientCharset,
! 1007: cs.services->request_charset());
! 1008: }
1.42 paf 1009: }
1010: }
1.45 ! paf 1011: } else
! 1012: msg="[can not get error description]";
! 1013: break;
1.1 parser 1014: }
1015: case OCI_NEED_DATA:
1016: msg="NEED_DATA"; break;
1017: case OCI_NO_DATA:
1018: msg="NODATA"; break;
1019: case OCI_INVALID_HANDLE:
1020: msg="INVALID_HANDLE"; break;
1021: case OCI_STILL_EXECUTING:
1022: msg="STILL_EXECUTE"; break;
1023: case OCI_CONTINUE:
1024: msg="CONTINUE"; break;
1025: default:
1026: msg="unknown"; break;
1027: }
1028:
1.22 paf 1029: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
1030: msg, step, (int)status);
1.1 parser 1031: longjmp(cs.mark, 1);
1032: }
1033:
1.27 paf 1034: void check(OracleSQL_connection_struct &cs, bool error) {
1035: if(error)
1036: longjmp(cs.mark, 1);
1037: }
1.1 parser 1038:
1039: /* ----------------------------------------------------------------- */
1040: /* Intbind callback that does not do any data input. */
1041: /* ----------------------------------------------------------------- */
1042: static sb4 cbf_no_data(
1.45 ! paf 1043: dvoid* /*ctxp*/,
! 1044: OCIBind* /*bindp*/,
! 1045: ub4 /*iter*/, ub4 /*index*/,
1.1 parser 1046: dvoid **bufpp,
1047: ub4 *alenpp,
1048: ub1 *piecep,
1049: dvoid **indpp) {
1050: *bufpp=(dvoid *)0;
1051: *alenpp=0;
1052: static sb2 null_ind=-1;
1053: *indpp=(dvoid *) &null_ind;
1054: *piecep=OCI_ONE_PIECE;
1055:
1056: return OCI_CONTINUE;
1057: }
1058:
1059: /* ----------------------------------------------------------------- */
1060: /* Outbind callback for returning data. */
1061: /* ----------------------------------------------------------------- */
1062: static sb4 cbf_get_data(dvoid *ctxp,
1063: OCIBind *bindp,
1.45 ! paf 1064: ub4 /*iter*/, ub4 index,
1.1 parser 1065: dvoid **bufpp,
1066: ub4 **alenp,
1067: ub1 *piecep,
1068: dvoid **indpp,
1069: ub2 **rcodepp) {
1070: OracleSQL_query_lobs::cbf_context_struct &context=
1071: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
1072:
1073: if(index==0) {
1074: static ub4 rows;
1.27 paf 1075: check(*context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 1076: OracleSQL_driver->OCIAttrGet(
1077: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
1078: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1079: context.rows->count=(ub2)rows;
1080: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1.42 paf 1081: context.cs->services->malloc_atomic(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
1.1 parser 1082: }
1083:
1084: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
1085:
1.27 paf 1086: check(*context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 1087: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1088: (ub4)OCI_DTYPE_LOB,
1089: 0, (dvoid **)0));
1090:
1091: *bufpp=var.locator;
1092: *alenp=&var.len;
1093: *indpp=(dvoid *) &var.ind;
1094: *piecep=OCI_ONE_PIECE;
1095: *rcodepp=&var.rcode;
1096:
1097: return OCI_CONTINUE;
1098: }
1099:
1.38 paf 1100: void tolower(char *out, const char *in, size_t size) {
1101: while(size--)
1.45 ! paf 1102: *out++=(char)tolower(*in++);
1.1 parser 1103: }
1.44 paf 1104: void toupper(char *out, const char *in, size_t size) {
1105: while(size--)
1.45 ! paf 1106: *out++=(char)toupper(*in++);
1.44 paf 1107: }
1108:
1.1 parser 1109:
1110: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1111: return OracleSQL_driver=new OracleSQL_Driver();
1112: }