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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: */
1.63 paf 10:
1.69 misha 11: static const char *RCSId="$Id: parser3oracle.C,v 1.68 2007/02/13 10:38:09 misha Exp $";
1.1 parser 12:
13: #include "config_includes.h"
14:
15: #include "pa_sql_driver.h"
16:
17: #include <oci.h>
18:
19: #define MAX_COLS 500
20: #define MAX_IN_LOBS 5
21: #define MAX_LOB_NAME_LENGTH 100
22: #define MAX_OUT_STRING_LENGTH 4000
1.61 paf 23: #define MAX_BINDS 100
1.1 parser 24:
25: #define EMPTY_CLOB_FUNC_CALL "empty_clob()"
26:
27: #include "ltdl.h"
28:
29: #define MAX_STRING 0x400
30: #define MAX_NUMBER 20
31:
32: #if _MSC_VER
33: # define snprintf _snprintf
34: # define strcasecmp _stricmp
35: # define strncasecmp _strnicmp
36: #endif
37:
38: #ifndef max
39: inline int max(int a, int b) { return a>b?a:b; }
40: inline int min(int a, int b){ return a<b?a:b; }
41: #endif
42:
1.45 paf 43: #if _MSC_VER
44: // interaction between '_setjmp' and C++ object destruction is non-portable
45: // but we forced to do that under HPUX
46: #pragma warning(disable:4611)
47: #endif
48:
1.61 paf 49: const sb2 MAGIC_INDICATOR_VALUE_MEANING_NOT_NULL_AND_UNCHANGED=99;
50:
1.33 paf 51: /// @todo small memory leaks here
1.10 paf 52: static int pa_setenv(const char *name, const char *value, bool do_append) {
53: const char *prev_value=0;
54: if(do_append)
55: prev_value=getenv(name);
1.4 paf 56: #ifdef HAVE_PUTENV
57: // MEM_LEAK_HERE. refer to EOF man putenv
1.10 paf 58: char *buf=(char *)::malloc(strlen(name)
59: +1
60: +(prev_value?strlen(prev_value):0)
61: +strlen(value)
62: +1);
1.4 paf 63: strcpy(buf, name);
64: strcat(buf, "=");
1.10 paf 65: if(prev_value)
66: strcat(buf, prev_value);
1.4 paf 67: strcat(buf, value);
1.5 paf 68: /*
69: if(FILE *f=fopen("f", "at")) {
70: fprintf(f, "****************************%s\n", buf);
71: // for (char **env = environ; env != NULL && *env != NULL; env++)
72: // fputs(*env, f);
73:
74: fclose(f);
75: }
76: */
1.4 paf 77: return putenv(buf);
78: #else
79: //#ifdef HAVE_SETENV
1.10 paf 80: if(value) {
81: if(prev_value) {
82: // MEM_LEAK_HERE
1.33 paf 83: char *buf=(char *)::malloc(strlen(prev_value)
1.10 paf 84: +strlen(value)
85: +1);
86: strcpy(buf, prev_value);
87: strcat(buf, value);
1.24 paf 88: value=buf;
89: }
90: return setenv(name, value, 1/*overwrite*/);
1.10 paf 91: } else {
1.4 paf 92: unsetenv(name);
93: return 0;
94: }
95: #endif
96: }
97:
1.69 misha 98: static char *lsplit(char *string, char delim){
99: if(string){
100: if(char* v=strchr(string, delim)){
1.1 parser 101: *v=0;
102: return v+1;
103: }
1.69 misha 104: }
105: return 0;
1.1 parser 106: }
107:
1.69 misha 108: static char *lsplit(char **string_ref, char delim){
109: char *result=*string_ref;
1.4 paf 110: char *next=lsplit(*string_ref, delim);
1.69 misha 111: *string_ref=next;
112: return result;
1.4 paf 113: }
114:
1.69 misha 115: static char* rsplit(char* string, char delim){
116: if(string){
117: if(char* v=strrchr(string, delim)){
1.67 paf 118: *v=0;
119: return v+1;
120: }
1.69 misha 121: }
122: return NULL;
123: }
124:
125: static void tolower_str(char *out, const char *in, size_t size) {
126: while(size--)
127: *out++=(char)tolower(*in++);
128: }
129: static void toupper_str(char *out, const char *in, size_t size) {
130: while(size--)
131: *out++=(char)toupper(*in++);
1.67 paf 132: }
133:
1.1 parser 134: #ifndef DOXYGEN
1.49 paf 135: struct Connection {
1.42 paf 136: SQL_Driver_services *services;
137:
1.1 parser 138: jmp_buf mark; char error[MAX_STRING];
1.27 paf 139: SQL_Error sql_error;
1.1 parser 140: OCIEnv *envhp;
141: OCIServer *srvhp;
142: OCIError *errhp;
143: OCISvcCtx *svchp;
144: OCISession *usrhp;
1.39 paf 145:
1.46 paf 146: char* fetch_buffers[MAX_COLS];
1.61 paf 147: char* bind_buffers[MAX_BINDS];
1.46 paf 148:
1.42 paf 149: struct Options {
150: bool bLowerCaseColumnNames;
1.69 misha 151: const char* client_charset;
1.42 paf 152: } options;
1.1 parser 153: };
154:
1.60 paf 155: struct Query_lobs {
1.1 parser 156: struct return_rows {
157: struct return_row {
158: OCILobLocator *locator; ub4 len;
159: int ind;
160: ub2 rcode;
161: } *row;
162: int count;
163: };
164: struct Item {
165: const char *name_ptr; size_t name_size;
166: char *data_ptr; size_t data_size;
167: OCILobLocator *locator;
168: OCIBind *bind;
169: return_rows rows;
1.57 paf 170: Connection *connection;
1.1 parser 171: } items[MAX_IN_LOBS];
172: int count;
173: };
1.60 paf 174:
1.1 parser 175: #endif
176:
177: // forwards
1.60 paf 178: static void faile(Connection& connection, const char *msg);
179: static void check(Connection& connection, const char *step, sword status);
180: static void check(Connection& connection, bool error);
1.1 parser 181: static sb4 cbf_no_data(
182: dvoid *ctxp,
183: OCIBind *bindp,
184: ub4 iter, ub4 index,
185: dvoid **bufpp,
186: ub4 *alenpp,
187: ub1 *piecep,
188: dvoid **indpp);
189: static sb4 cbf_get_data(dvoid *ctxp,
190: OCIBind *bindp,
191: ub4 iter, ub4 index,
192: dvoid **bufpp,
193: ub4 **alenp,
194: ub1 *piecep,
195: dvoid **indpp,
196: ub2 **rcodepp);
197:
1.49 paf 198: static const char *options2env(char *s, Connection::Options* options) {
1.69 misha 199: while(s){
200: if(char *key=lsplit(&s, '&')){
201: if(*key){
202: if(char *value=lsplit(key, '=')){
203: if(strcmp(key, "ClientCharset")== 0){
204: if(options){
1.55 paf 205: toupper_str(value, value, strlen(value));
1.69 misha 206: options->client_charset=value;
1.44 paf 207: }
1.42 paf 208: continue;
209: }
210:
1.69 misha 211: if(strcmp(key, "LowerCaseColumnNames")==0){
1.42 paf 212: if(options)
1.69 misha 213: options->bLowerCaseColumnNames=atoi(value)!=0;
1.42 paf 214: continue;
215: }
216:
217: bool do_append=key[strlen(key)-1]=='+'; // PATH+=
218: if(do_append)
219: key[strlen(key)-1]=0; // remove trailing +
220: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
221: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
222: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
223: || do_append
224: ) {
225: if(pa_setenv(key, value, do_append)!=0)
226: return "problem changing process environment" /*key*/;
227: } else
228: return "unknown option" /*key*/;
229: } else
230: return "option without =value" /*key*/;
231: }
232: }
233: }
234: return 0;
235: }
236:
1.1 parser 237: /**
238: OracleSQL server driver
239: */
240: class OracleSQL_Driver : public SQL_Driver {
241: public:
242:
243: OracleSQL_Driver() : SQL_Driver() {
244: }
245:
246: /// get api version
247: int api_version() { return SQL_DRIVER_API_VERSION; }
1.69 misha 248:
1.6 paf 249: /** initialize driver by loading sql dynamic link library
250: @todo ?objects=1 which would turn on OCI_OBJECT init flag
251: */
1.5 paf 252: const char *initialize(char *dlopen_file_spec) {
253: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 254:
255: const char *error=dlopen_file_spec?
256: dlink(dlopen_file_spec):"client library column is empty";
257: if(!error) {
1.39 paf 258: error=options2env(options, 0);
1.1 parser 259:
1.5 paf 260: if(!error)
261: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
262: (dvoid * (*)(void *, unsigned int))0,
263: (dvoid * (*)(void*, void*, unsigned int))0,
264: (void (*)(void*, void*))0
265: );
1.1 parser 266: }
267:
268: return error;
269: }
270:
271: /** connect
1.58 paf 272: @param url
1.4 paf 273: format: @b user:pass@service?
1.69 misha 274: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
275: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
276: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
277: ORA_ENCRYPT_LOGIN=TRUE&
278: ClientCharset=charset&
279: LowerCaseColumnNames=0
1.4 paf 280:
281: @todo environment manupulation doesnt look thread safe
1.58 paf 282: @todo allocate 'aused_only_in_connect_url' on gc heap, so it can be manipulated directly
1.1 parser 283: */
284: void connect(
1.69 misha 285: char *url,
286: SQL_Driver_services& services,
287: void **connection_ref ///< output: Connection *
1.56 paf 288: )
289: {
290: // connections are cross-request, do not use services._alloc [linked with request]
1.69 misha 291: Connection& connection=*(Connection *)services.malloc(sizeof(Connection));
1.49 paf 292: connection.services=&services;
1.69 misha 293: connection.options.bLowerCaseColumnNames=true;
1.50 paf 294: *connection_ref=&connection;
1.1 parser 295:
1.58 paf 296: char *user=url;
1.67 paf 297: char *service=rsplit(user, '@');
1.1 parser 298: char *pwd=lsplit(user, ':');
1.4 paf 299: char *options=lsplit(service, '?');
1.1 parser 300:
301: if(!(user && pwd && service))
302: services._throw("mailformed connect part, must be 'user:pass@service'");
303:
1.49 paf 304: if(const char *error=options2env(options, &connection.options))
1.5 paf 305: services._throw(error);
1.4 paf 306:
1.49 paf 307: if(setjmp(connection.mark))
308: services._throw(connection.error);
1.1 parser 309:
310: // Allocate and initialize OCIError handle, attempt #1
311: /*
312: grabbed from sample
313: /server.804/a58234/oci_func.htm#446192
314: but doc
315: /server.804/a58234/oci_func.htm#446100
316: doesnt have this param listed as allowed
317: 8.1.6 client library barks as OCI_INVALID_HANDLE
318: and debugging revealed that OCI_HTYPE_ENV param value is invalid
319: later in doc
320: /server.804/a58234/oci_func.htm#446192
321: on OCIEnvInit thay say
322: "No changes are done to an already initialized handle"
323: think, this is some sort of backward compatibility wonder.
324: leaving as it is, and without check()
325: */
1.49 paf 326: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &connection.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
1.1 parser 327: // Initialize an environment handle, attempt #2
1.49 paf 328: check(connection, "EnvInit", OCIEnvInit(
329: &connection.envhp, (ub4)OCI_DEFAULT, 0, 0));
1.1 parser 330: // Allocate and initialize OCIError handle
1.49 paf 331: check(connection, "HandleAlloc errhp", OCIHandleAlloc(
332: (dvoid *)connection.envhp, (dvoid **) &connection.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
1.1 parser 333: // Allocate and initialize OCIServer handle
1.49 paf 334: check(connection, "HandleAlloc srvhp", OCIHandleAlloc(
335: (dvoid *)connection.envhp, (dvoid **) &connection.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
1.1 parser 336: // Attach to a 'service'; initialize server context handle
1.49 paf 337: check(connection, "ServerAttach", OCIServerAttach(
338: connection.srvhp, connection.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
1.1 parser 339: // Allocate and initialize OCISvcCtx handle
1.49 paf 340: check(connection, "HandleAlloc svchp", OCIHandleAlloc(
341: (dvoid *)connection.envhp, (dvoid **) &connection.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
1.1 parser 342: // set attribute server context in the service context
1.49 paf 343: check(connection, "AttrSet server-service", OCIAttrSet(
344: (dvoid *)connection.svchp, (ub4)OCI_HTYPE_SVCCTX,
345: (dvoid *)connection.srvhp, (ub4)0,
346: (ub4)OCI_ATTR_SERVER, (OCIError *)connection.errhp));
1.1 parser 347: // allocate a user context handle
1.49 paf 348: check(connection, "HandleAlloc usrhp", OCIHandleAlloc(
349: (dvoid *)connection.envhp, (dvoid **)&connection.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
1.1 parser 350: // set 'user' name
1.49 paf 351: check(connection, "AttrSet user-session", OCIAttrSet(
352: (dvoid *)connection.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 353: (dvoid *)user, (ub4)strlen(user),
1.49 paf 354: OCI_ATTR_USERNAME, connection.errhp));
1.1 parser 355: // set 'pwd' password
1.49 paf 356: check(connection, "AttrSet pwd-session", OCIAttrSet(
357: (dvoid *)connection.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 358: (dvoid *)pwd, (ub4)strlen(pwd),
1.49 paf 359: OCI_ATTR_PASSWORD, connection.errhp));
1.1 parser 360: // Authenticate a user
1.49 paf 361: check(connection, "SessionBegin", OCISessionBegin(
362: connection.svchp, connection.errhp, connection.usrhp,
1.1 parser 363: OCI_CRED_RDBMS, OCI_DEFAULT));
364: // remember connection in session
1.49 paf 365: check(connection, "AttrSet service-session", OCIAttrSet(
366: (dvoid *)connection.svchp, (ub4)OCI_HTYPE_SVCCTX,
367: (dvoid *)connection.usrhp, (ub4)0,
368: OCI_ATTR_SESSION, connection.errhp));
1.1 parser 369: }
1.69 misha 370:
1.49 paf 371: void disconnect(void *aconnection) {
372: Connection& connection=*static_cast<Connection *>(aconnection);
1.47 paf 373:
1.58 paf 374: // free fetch buffers. leave that to GC [no such services func. yet?]
375: /*
1.47 paf 376: for(int i=0; i<MAX_COLS; i++) {
1.49 paf 377: if(void* fetch_buffer=connection.fetch_buffers[i])
1.58 paf 378: connection.services->free(fetch_buffer);
1.47 paf 379: else
380: break;
1.58 paf 381: }
382: */
1.47 paf 383:
1.1 parser 384: // Terminate a user session
385: OCISessionEnd(
1.49 paf 386: connection.svchp, connection.errhp, connection.usrhp, (ub4)OCI_DEFAULT);
1.1 parser 387: // Detach from a server; uninitialize server context handle
388: OCIServerDetach(
1.49 paf 389: connection.srvhp, connection.errhp, (ub4)OCI_DEFAULT);
1.1 parser 390: // Free a previously allocated handles
391: /*
392: oci will free them up as belonging to env
393: OCIHandleFree(
1.49 paf 394: (dvoid *)connection.srvhp, (ub4)OCI_HTYPE_SERVER);
1.1 parser 395: OCIHandleFree(
1.49 paf 396: (dvoid *)connection.svchp, (ub4)OCI_HTYPE_SVCCTX);
1.1 parser 397: OCIHandleFree(
1.49 paf 398: (dvoid *)connection.errhp, (ub4)OCI_HTYPE_ERROR);
1.1 parser 399: */
400: OCIHandleFree(
1.49 paf 401: (dvoid *)connection.envhp, (ub4)OCI_HTYPE_ENV);
1.1 parser 402:
1.58 paf 403: // free connection. leave that to GC [no such services func. yet?]
404: // connection.services->free(&connection);
1.1 parser 405: }
1.69 misha 406:
1.49 paf 407: void commit(void *aconnection) {
408: Connection& connection=*static_cast<Connection *>(aconnection);
409: if(setjmp(connection.mark))
410: connection.services->_throw(connection.error);
1.1 parser 411:
1.49 paf 412: check(connection, "commit", OCITransCommit(connection.svchp, connection.errhp, 0));
1.1 parser 413: }
1.69 misha 414:
1.49 paf 415: void rollback(void *aconnection) {
416: Connection& connection=*static_cast<Connection *>(aconnection);
417: if(setjmp(connection.mark))
418: connection.services->_throw(connection.error);
1.1 parser 419:
1.42 paf 420: // sometimes rollback is done in context when this yields error which masks previous error
421: // consider consequent errors not very important to report, reporting first one
1.49 paf 422: /*check(connection, "rollback", */OCITransRollback(connection.svchp, connection.errhp, 0)/*)*/;
1.1 parser 423: }
424:
1.45 paf 425: bool ping(void* /*connection*/) {
1.1 parser 426: // maybe OCIServerVersion?
1.4 paf 427: // select 0 from dual
1.1 parser 428: return true;
429: }
430:
1.49 paf 431: const char* quote(void *aconnection,
1.42 paf 432: const char *from, unsigned int length)
433: {
1.49 paf 434: Connection& connection=*static_cast<Connection *>(aconnection);
435: char *result=(char*)connection.services->malloc_atomic(length*2+1);
1.32 paf 436: char *to=result;
437: while(length--) {
438: switch(*from) {
439: case '\'': // "'" -> "''"
1.35 paf 440: *to++='\'';
1.32 paf 441: break;
1.1 parser 442: }
1.32 paf 443: *to++=*from++;
444: }
445: *to=0;
446: return result;
1.1 parser 447: }
1.69 misha 448:
1.60 paf 449: void query(void* aconnection,
1.69 misha 450: const char* astatement,
451: size_t placeholders_count, Placeholder* placeholders,
452: unsigned long offset, unsigned long limit,
453: SQL_Driver_query_event_handlers& handlers
454: ){
1.61 paf 455:
1.49 paf 456: Connection& connection=*static_cast<Connection *>(aconnection);
1.60 paf 457: Query_lobs lobs={{0}, 0};
1.1 parser 458: OCIStmt *stmthp=0;
459:
1.49 paf 460: SQL_Driver_services& services=*connection.services;
1.42 paf 461:
1.69 misha 462: bool transcode_needed=_transcode_required(connection);
463:
464: if(transcode_needed){
465: // transcode query from $request:charset to ?ClientCharset
1.60 paf 466: size_t transcoded_xxx_size;
1.42 paf 467: services.transcode(astatement, strlen(astatement),
1.60 paf 468: astatement, transcoded_xxx_size,
1.42 paf 469: services.request_charset(),
1.69 misha 470: connection.options.client_charset);
1.53 paf 471: }
1.42 paf 472:
1.1 parser 473: bool failed=false;
1.49 paf 474: if(setjmp(connection.mark)) {
1.1 parser 475: failed=true;
476: goto cleanup;
477: } else {
1.61 paf 478: if(placeholders_count>MAX_BINDS)
479: fail(connection, "too many bind variables");
480:
1.49 paf 481: const char *statement=preprocess_statement(connection, astatement, lobs);
1.1 parser 482:
1.49 paf 483: check(connection, "HandleAlloc STMT", OCIHandleAlloc(
484: (dvoid *)connection.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
485: check(connection, "syntax",
486: OCIStmtPrepare(stmthp, connection.errhp, (unsigned char *)statement,
1.1 parser 487: (ub4)strlen((char *)statement),
488: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
1.60 paf 489:
490: struct Bind_info {
491: OCIBind *bind;
492: sb2 indicator;
493: };
494:
495: int binds_size=sizeof(Bind_info) * placeholders_count;
1.65 paf 496: // we DO store OCIBind* into ATOMIC gc memory,
497: // but we do not allocate/free it, that's done automatically from oracle [using environment handles]
498: // so we don't have to bother with that
1.60 paf 499: Bind_info* binds=static_cast<Bind_info*>(services.malloc_atomic(binds_size));
1.1 parser 500: {
1.60 paf 501: for(size_t i=0; i<placeholders_count; i++) {
502: Placeholder& ph=placeholders[i];
503: Bind_info& bi=binds[i];
504: bi.bind=0;
1.61 paf 505: // http://i/docs/oracle/server.804/a58234/basics.htm#422173
506: bi.indicator=ph.is_null? -1: MAGIC_INDICATOR_VALUE_MEANING_NOT_NULL_AND_UNCHANGED;
1.60 paf 507:
508: size_t value_length;
509:
1.69 misha 510: if(transcode_needed){
511: // transcode bind variables names and their values from $request:charset to ?ClientCharset
1.60 paf 512: size_t name_length;
513: services.transcode(ph.name, strlen(ph.name),
514: ph.name, name_length,
515: services.request_charset(),
1.69 misha 516: connection.options.client_charset);
1.60 paf 517:
518: if(ph.value)
519: services.transcode(ph.value, strlen(ph.value),
520: ph.value, value_length,
521: services.request_charset(),
1.69 misha 522: connection.options.client_charset);
1.60 paf 523: } else {
524: value_length=ph.value? strlen(ph.value): 0;
525: }
526:
1.65 paf 527: // clone value for possible output binds
528: // note: even empty input can be replaced by huge output
529: char*& value_buf=connection.bind_buffers[i]; // get cached buffer
530: if(!value_buf) // allocate if needed, caching it
531: value_buf=(char *)services.malloc_atomic(MAX_OUT_STRING_LENGTH+1/*terminator*/);
532: if(value_length)
533: memcpy(value_buf, ph.value, value_length+1);
1.66 paf 534: else
535: value_buf[0]=0;
1.61 paf 536:
1.65 paf 537: char name_buf[MAX_STRING];
538: sb4 placeh_len=snprintf(name_buf, sizeof(name_buf), ":%s", ph.name);
1.61 paf 539: char check_step_buf[MAX_STRING];
540: snprintf(check_step_buf, sizeof(check_step_buf), "bind by name :%s", ph.name);
541: check(connection, check_step_buf, OCIBindByName(stmthp,
1.60 paf 542: &bi.bind, connection.errhp,
1.65 paf 543: (text*)name_buf, placeh_len,
544: (dvoid *)value_buf, (sword)(MAX_OUT_STRING_LENGTH+1), SQLT_STR, (dvoid *)&bi.indicator,
1.60 paf 545: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DEFAULT));
546: }
547:
1.1 parser 548: for(int i=0; i<lobs.count; i++) {
1.60 paf 549: Query_lobs::Item &item=lobs.items[i];
1.49 paf 550: check(connection, "alloc output var desc", OCIDescriptorAlloc(
1.57 paf 551: (dvoid *)connection.envhp, (dvoid **)&item.locator, (ub4)OCI_DTYPE_LOB, 0, 0));
1.1 parser 552:
1.59 paf 553: char placeholder_buf[MAX_STRING];
554: sb4 placeh_len=snprintf(placeholder_buf, sizeof(placeholder_buf),
555: ":%.*s", item.name_size, item.name_ptr);
556: check(connection, "bind lob", OCIBindByName(stmthp,
1.57 paf 557: &item.bind, connection.errhp,
1.59 paf 558: (text*)placeholder_buf, placeh_len,
1.57 paf 559: (dvoid *)&item.locator,
560: (sword)sizeof (item.locator), SQLT_CLOB, (dvoid *)0,
1.1 parser 561: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
562:
1.57 paf 563: item.rows.count=0;
564: item.connection=&connection;
1.49 paf 565: check(connection, "bind dynamic", OCIBindDynamic(
1.57 paf 566: item.bind, connection.errhp,
567: (dvoid *) &item, cbf_no_data,
568: (dvoid *) &item, cbf_get_data));
1.1 parser 569: }
570: }
571:
1.49 paf 572: execute_prepared(connection,
1.26 paf 573: statement, stmthp, lobs,
574: offset, limit, handlers);
1.60 paf 575:
576: {
577: for(size_t i=0; i<placeholders_count; i++) {
578: Bind_info& bi=binds[i];
1.61 paf 579: if(bi.indicator==MAGIC_INDICATOR_VALUE_MEANING_NOT_NULL_AND_UNCHANGED/*unchanged*/)
1.60 paf 580: continue;
581:
1.65 paf 582: Placeholder& ph=placeholders[i];
1.60 paf 583: if(bi.indicator==-1)
584: ph.is_null=true;
585: else
586: if(bi.indicator==0)
587: ph.is_null=false;
588: else
589: fail(connection, bi.indicator<0?
1.61 paf 590: "output bind buffer overflow, additionally size too big to be returned in 'indicator'"
591: : "output bind buffer overflow");
1.60 paf 592:
593: ph.were_updated=true;
1.65 paf 594: const char* bind_buffer=connection.bind_buffers[i];
595: if( size_t value_length=strlen(bind_buffer) ) {
596: char* returned_value=(char*)services.malloc_atomic(value_length+1/*terminator*/);
597: memcpy(returned_value, bind_buffer, value_length+1 );
598: ph.value=returned_value;
599:
1.69 misha 600: if(transcode_needed){
601: // transcode bind variable output from ?ClientCharset to $request:charset
1.65 paf 602: services.transcode(ph.value, value_length,
603: ph.value, value_length/*<this new value is not used afterwards, actually*/,
1.69 misha 604: connection.options.client_charset,
1.60 paf 605: services.request_charset());
606: }
1.65 paf 607: } else {
608: ph.value=0;
1.60 paf 609: }
610: }
611: }
1.1 parser 612: }
613: cleanup: // no check call after this point!
614: {
615: for(int i=0; i<lobs.count; i++) {
616: /* free var locator */
617: if(OCILobLocator *locator=lobs.items[i].locator)
618: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
619:
620: /* free rows descriptors */
1.60 paf 621: Query_lobs::return_rows &rows=lobs.items[i].rows;
1.1 parser 622: for(int r=0; r<rows.count; r++)
623: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
624: }
625: }
626: if(stmthp)
627: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
628:
1.26 paf 629: if(failed) {
1.49 paf 630: if(connection.sql_error.defined())
631: services._throw(connection.sql_error);
632: services._throw(connection.error);
1.26 paf 633: }
1.1 parser 634: }
635:
636: private: // private funcs
637:
1.49 paf 638: const char *preprocess_statement(Connection& connection,
1.60 paf 639: const char *astatement, Query_lobs &lobs) {
1.1 parser 640: size_t statement_size=strlen(astatement);
1.49 paf 641: SQL_Driver_services& services=*connection.services;
1.1 parser 642:
1.32 paf 643: char *result=(char *)services.malloc_atomic(statement_size
1.1 parser 644: +MAX_STRING // in case of short 'strings'
645: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
646: +1);
647: const char *o=astatement;
648:
649: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
650: char *n=result;
651: while(*o) {
652: if(
653: o[0]=='/' &&
654: o[1]=='*' &&
655: o[2]=='*') { // name start
1.34 paf 656: const char* saved_o=o;
1.1 parser 657: o+=3;
658: const char *name_begin=o;
659: while(*o)
660: if(
661: o[0]=='*' &&
662: o[1]=='*' &&
663: o[2]=='/' &&
664: o[3]=='\'') { // name end
1.34 paf 665: saved_o=0; // found, marking that
1.1 parser 666: const char *name_end=o;
667: o+=4;
1.60 paf 668: Query_lobs::Item &item=lobs.items[lobs.count++];
1.1 parser 669: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
1.32 paf 670: item.data_ptr=(char *)services.malloc_atomic(statement_size/*max*/); item.data_size=0;
1.1 parser 671:
672: const char *start=o;
673: bool escaped=false;
674: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
1.68 misha 675: escaped=!escaped && (o[0]=='\'' && o[1]=='\'');
1.1 parser 676: if(escaped) {
677: // write pending, skip "\" or "'"
678: if(size_t size=o-start) {
679: memcpy(item.data_ptr+item.data_size, start, size);
680: item.data_size+=size;
681: }
682: start=++o;
683: } else
684: o++;
685: }
686: if(size_t size=o-start) {
687: memcpy(item.data_ptr+item.data_size, start, size);
688: item.data_size+=size;
689: }
690: if(*o)
691: o++; // skip "'"
692:
693: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
694: break;
695: } else
696: o++; // /**skip**/'xxx'
1.34 paf 697: if(saved_o) {
698: o=saved_o;
699: *n++=*o++;
700: }
1.1 parser 701: } else
702: *n++=*o++;
703: }
704: *n=0;
705:
706: if(lobs.count) {
707: int i;
708: n+=sprintf(n, " returning ");
709: for(i=0; i<lobs.count; i++) {
710: if(i)
711: *n++=',';
712: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
713: }
714: n+=sprintf(n, " into ");
715: for(i=0; i<lobs.count; i++) {
716: if(i)
1.41 paf 717: *n++=',';
1.1 parser 718: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
719: }
720: }
721:
722: return result;
723: }
724:
725: void execute_prepared(
1.49 paf 726: Connection& connection,
1.60 paf 727: const char *statement, OCIStmt *stmthp, Query_lobs &lobs,
1.1 parser 728: unsigned long offset, unsigned long limit,
729: SQL_Driver_query_event_handlers& handlers) {
730:
731: ub2 stmt_type=0; // UNKNOWN
732: /*
733: //gpfs on sun. paf 000818
734: //Zanyway, this is needed before.
1.49 paf 735: check(connection, "get stmt type", OCIAttrGet(
1.1 parser 736: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
1.49 paf 737: (ub4 *)0, OCI_ATTR_STMT_TYPE, connection.errhp));
1.1 parser 738: */
1.16 paf 739:
1.62 paf 740: while(isspace((unsigned char)*statement))
1.16 paf 741: statement++;
1.1 parser 742: if(strncasecmp(statement, "select", 6)==0)
743: stmt_type=OCI_STMT_SELECT;
744: else if(strncasecmp(statement, "insert", 6)==0)
745: stmt_type=OCI_STMT_INSERT;
746: else if(strncasecmp(statement, "update", 6)==0)
747: stmt_type=OCI_STMT_UPDATE;
748:
1.49 paf 749: sword status=OCIStmtExecute(connection.svchp, stmthp, connection.errhp,
1.1 parser 750: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
751: (OCISnapshot *)NULL,
752: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
753:
754: if(status!=OCI_NO_DATA)
1.49 paf 755: check(connection, "execute", status);
1.1 parser 756:
757: {
758: for(int i=0; i<lobs.count; i++)
759: if(ub4 bytes_to_write=lobs.items[i].data_size) {
1.60 paf 760: Query_lobs::return_rows *rows=&lobs.items[i].rows;
1.1 parser 761: for(int r=0; r<rows->count; r++) {
762: OCILobLocator *locator=rows->row[r].locator;
1.49 paf 763: check(connection, "lobwrite", OCILobWrite (
764: connection.svchp, connection.errhp,
1.1 parser 765: locator, &bytes_to_write, 1,
766: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
767: (dvoid *)0, 0, (ub2)0,
768: (ub1) SQLCS_IMPLICIT));
769: }
770: }
771: }
772:
773: switch(stmt_type) {
774: case OCI_STMT_SELECT:
1.49 paf 775: fetch_table(connection,
1.1 parser 776: stmthp, offset, limit,
777: handlers);
778: break;
779: default:
780: /*
781: case OCI_STMT_INSERT:
782: case OCI_STMT_UPDATE:
783: */
784: break;
785: }
786: }
787:
1.49 paf 788: void fetch_table(Connection& connection,
1.1 parser 789: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
1.42 paf 790: SQL_Driver_query_event_handlers& handlers)
791: {
1.69 misha 792: bool transcode_needed=_transcode_required(connection);
793:
1.49 paf 794: SQL_Driver_services& services=*connection.services;
1.12 paf 795:
1.10 paf 796: ub4 prefetch_rows=100;
1.49 paf 797: check(connection, "AttrSet prefetch-rows", OCIAttrSet(
1.9 paf 798: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
799: (dvoid *)&prefetch_rows, (ub4)0,
1.49 paf 800: (ub4)OCI_ATTR_PREFETCH_ROWS, (OCIError *)connection.errhp));
1.9 paf 801:
1.20 paf 802: ub4 prefetch_mem_size=100*0x400;
1.49 paf 803: check(connection, "AttrSet prefetch-memory", OCIAttrSet(
1.9 paf 804: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT,
805: (dvoid *)&prefetch_mem_size, (ub4)0,
1.49 paf 806: (ub4)OCI_ATTR_PREFETCH_MEMORY, (OCIError *)connection.errhp));
1.1 parser 807:
1.69 misha 808: OCIParam *mypard;
809: ub2 dtype;
810: const char* col_name;
1.1 parser 811:
1.40 paf 812: struct Col {
1.1 parser 813: ub2 type;
814: char *str;
815: OCILobLocator *var;
816: OCIDefine *def;
817: sb2 indicator;
818: } cols[MAX_COLS]={0};
819: int column_count=0;
820:
821: bool failed=false;
1.49 paf 822: jmp_buf saved_mark; memcpy(saved_mark, connection.mark, sizeof(jmp_buf));
823: if(setjmp(connection.mark)) {
1.1 parser 824: failed=true;
825: goto cleanup;
826: } else {
1.27 paf 827: // idea of preincrementing is that at error time all handles would free up
828: while(++column_count<=MAX_COLS) {
829: /* get next descriptor, if there is one */
1.49 paf 830: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, connection.errhp, (void **)&mypard,
1.27 paf 831: (ub4) column_count)!=OCI_SUCCESS) {
832: --column_count;
833: break;
834: }
835:
836: /* Retrieve the data type attribute */
1.49 paf 837: check(connection, "get type", OCIAttrGet(
1.27 paf 838: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
839: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
1.49 paf 840: (OCIError *)connection.errhp));
1.27 paf 841:
842: /* Retrieve the column name attribute */
843: ub4 col_name_len;
1.49 paf 844: check(connection, "get name", OCIAttrGet(
1.27 paf 845: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
846: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
1.49 paf 847: (OCIError *)connection.errhp));
1.69 misha 848:
849: if(transcode_needed){
850: // transcode column name from ?ClientCharset to $request:charset
1.51 paf 851: services.transcode(col_name, col_name_len,
852: col_name, col_name_len,
1.69 misha 853: connection.options.client_charset,
1.51 paf 854: services.request_charset());
855: }
856:
1.40 paf 857: Col& col=cols[column_count-1];
1.27 paf 858: {
1.38 paf 859: size_t length=(size_t)col_name_len;
860: char *ptr=(char *)services.malloc_atomic(length+1);
1.49 paf 861: if( connection.options.bLowerCaseColumnNames )
1.55 paf 862: tolower_str(ptr, col_name, length);
1.39 paf 863: else
864: memcpy(ptr, col_name, length);
1.38 paf 865: ptr[length]=0;
1.49 paf 866: check(connection, handlers.add_column(connection.sql_error, ptr, length));
1.27 paf 867: }
868:
869: ub2 coerce_type=dtype;
870: sb4 size=0;
871: void *ptr;
872:
873: switch(dtype) {
1.69 misha 874: case SQLT_CLOB:
875: {
876: check(connection, "alloc output var desc", OCIDescriptorAlloc(
877: (dvoid *)connection.envhp, (dvoid **)(ptr=&col.var),
878: (ub4)OCI_DTYPE_LOB,
879: 0, (dvoid **)0));
880:
881: size=0;
882: break;
883: }
884: default:
885: coerce_type=SQLT_STR;
886: char*& buf=connection.fetch_buffers[column_count-1];
887: ptr=buf; // get cached buffer
888: if(!ptr) // allocate if needed, caching it
889: ptr=buf=(char *)services.malloc_atomic(MAX_OUT_STRING_LENGTH+1/*terminator*/);
890: col.str=(char*)ptr;
891: size=MAX_OUT_STRING_LENGTH;
1.1 parser 892: break;
893: }
894:
1.40 paf 895: col.type=coerce_type;
1.1 parser 896:
1.48 paf 897: // http://i/docs/oracle/server.804/a58234/oci_func.htm#449680
898: // this call implicitly allocates the define handle
899: // http://sunsite.eunnet.net/documentation/oracle.8.0.4/server.804/a58234/basics.htm
900: // when a statement handle is freed, any bind and define handles associated with it
901: // are also freed
1.49 paf 902: col.def=0; check(connection, "DefineByPos", OCIDefineByPos(
903: stmthp, &col.def, connection.errhp,
1.27 paf 904: column_count, (ub1 *) ptr, size,
1.40 paf 905: coerce_type, (dvoid *) &col.indicator,
1.27 paf 906: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
907: }
908:
1.49 paf 909: check(connection, handlers.before_rows(connection.sql_error));
1.27 paf 910:
1.69 misha 911: for(unsigned long row=0; limit==SQL_NO_LIMIT || row<offset+limit; row++) {
1.49 paf 912: sword status=OCIStmtFetch(stmthp, connection.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
1.27 paf 913: (ub4)OCI_DEFAULT);
914: if(status==OCI_NO_DATA)
915: break;
1.49 paf 916: check(connection, "fetch", status);
1.3 paf 917:
1.27 paf 918: if(row>=offset) {
1.49 paf 919: check(connection, handlers.add_row(connection.sql_error));
1.27 paf 920: for(int i=0; i<column_count; i++) {
1.37 paf 921: size_t length=0;
1.42 paf 922: char* strm=0;
1.69 misha 923: bool transcode_value=transcode_needed;
1.60 paf 924:
925: sb2 indicator=cols[i].indicator;
926: if(indicator!=-1) { // not NULL
927: if(indicator!=0)
928: fail(connection, indicator<0?
929: "column return buffer overflow, additionally size too big to be returned in 'indicator'"
930: : "column return buffer overflow");
1.69 misha 931:
932: switch(cols[i].type){
933: case SQLT_CLOB:
934: {
935: ub4 offset=1;
936: OCILobLocator *var=(OCILobLocator *)cols[i].var;
937: size_t read_size=0;
938: strm=(char*)services.malloc_atomic(1/*for terminator*/); // set type of memory block
939: do {
940: char buf[MAX_STRING*10];
941: ub4 amtp=0/*to be read in stream mode*/;
942: // http://i/docs/oracle/server.804/a58234/oci_func.htm#427818
943: status=OCILobRead(connection.svchp, connection.errhp,
944: var, &amtp, offset, (dvoid *)buf,
945: sizeof(buf),
946: (dvoid *)0, 0,
947: (ub2)0, (ub1)SQLCS_IMPLICIT);
948: if(status!=OCI_SUCCESS && status!=OCI_NEED_DATA)
949: check(connection, "lobread", status);
950:
951: strm=(char*)services.realloc(strm, read_size+amtp+1/*for termintator*/);
952: memcpy(strm+read_size, buf, amtp);
953: read_size+=amtp;
954: offset+=amtp;
955: } while(status==OCI_NEED_DATA);
956:
957: length=(size_t)read_size;
958: strm[length]=0;
959: break;
960: }
961: case SQLT_NUM:
962: case SQLT_INT:
963: case SQLT_FLT:
964: case SQLT_LNG:
965: case SQLT_RID:
966: case SQLT_UIN:
967: case SQLT_DATE:
968: case SQLT_TIME:
969: case SQLT_TIME_TZ:
970: case SQLT_TIMESTAMP:
971: case SQLT_TIMESTAMP_TZ:
972: transcode_value=false; // not needed to call transcode method for numbers and dated
973: default:
974: if(const char *value=cols[i].str) {
975: length=strlen(value);
976: strm=(char*)services.malloc_atomic(length+1);
977: memcpy(strm, value, length+1);
978: } else {
979: length=0;
980: strm=0;
981: }
1.1 parser 982: break;
1.27 paf 983: }
1.60 paf 984: }
1.42 paf 985:
986: const char* str=strm;
1.69 misha 987: if(transcode_value && str && length){
988: // transcode cell value from ?ClientCharset to $request:charset
989: // todo: skip transcode for numbers/dates
990: services.transcode(str, length,
991: str, length,
992: connection.options.client_charset,
993: services.request_charset());
1.42 paf 994: }
995:
1.49 paf 996: check(connection, handlers.add_row_cell(connection.sql_error, str, length));
1.1 parser 997: }
998: }
999: }
1000: }
1001:
1002: cleanup: // no check call after this point!
1003: for(int i=0; i<column_count; i++) {
1004: switch(cols[i].type) {
1005: case SQLT_CLOB:
1006: /* free var locator */
1007: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
1008: break;
1009: default:
1010: break;
1011: }
1012: }
1013:
1014: if(failed) // need rethrow?
1015: longjmp(saved_mark, 1);
1016: }
1017:
1.69 misha 1018: bool _transcode_required(Connection& connection){
1019: return (connection.options.client_charset && strcmp(connection.options.client_charset, connection.services->request_charset())!=0);
1020: }
1021:
1.1 parser 1022: private: // conn client library funcs
1023:
1.60 paf 1024: friend void fail(Connection& connection, const char *msg);
1.49 paf 1025: friend void check(Connection& connection, const char *step, sword status);
1.1 parser 1026: friend sb4 cbf_get_data(dvoid *ctxp,
1027: OCIBind *bindp,
1028: ub4 iter, ub4 index,
1029: dvoid **bufpp,
1030: ub4 **alenp,
1031: ub1 *piecep,
1032: dvoid **indpp,
1033: ub2 **rcodepp);
1034:
1035:
1036: #define OCI_DECL(name, params) \
1037: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
1038:
1039: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
1040: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
1041: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
1042: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
1043:
1044: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
1045: size_t xtramem_sz, dvoid **usrmempp));
1046:
1047: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
1048: dvoid *attributep, ub4 *sizep, ub4 attrtype,
1049: OCIError *errhp));
1050:
1051: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
1052: ub4 size, ub4 attrtype, OCIError *errhp));
1053:
1054: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
1055: ub4 position, dvoid *valuep, sb4 value_sz,
1056: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
1057: ub4 maxarr_len, ub4 *curelep, ub4 mode));
1058:
1.59 paf 1059: OCI_DECL(BindByName, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
1060: text* placeholder, sb4 placeh_len, dvoid *valuep, sb4 value_sz,
1061: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
1062: ub4 maxarr_len, ub4 *curelep, ub4 mode));
1063:
1.1 parser 1064: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
1065: OCICallbackInBind icbfp, dvoid *octxp,
1066: OCICallbackOutBind ocbfp));
1067:
1068: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
1069: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
1070: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
1071:
1072: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
1073: CONST ub4 type, CONST size_t xtramem_sz,
1074: dvoid **usrmempp));
1075:
1076: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
1077:
1078:
1079: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
1080: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
1081:
1082: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
1083: CONST size_t xtramem_sz, dvoid **usrmempp));
1084:
1085: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
1086:
1087: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
1088: OCILobLocator *locp,
1089: ub4 *lenp));
1090:
1091: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
1092: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
1093: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
1094: CONST dvoid *bufp,
1095: ub4 len,
1096: ub1 piece),
1097: ub2 csid, ub1 csfrm));
1098:
1099: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
1100: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
1101: ub1 piece, dvoid *ctxp,
1102: sb4 (*cbfp)(dvoid *ctxp,
1103: dvoid *bufp,
1104: ub4 *len,
1105: ub1 *piece),
1106: ub2 csid, ub1 csfrm));
1107:
1108: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
1109: dvoid **parmdpp, ub4 pos));
1110:
1111: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
1112: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
1113:
1114: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
1115:
1116: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
1117: ub4 credt, ub4 mode));
1118:
1119: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
1120: ub4 mode));
1121:
1122: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
1123: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
1124: OCISnapshot *snap_out, ub4 mode));
1125:
1126: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
1127: ub2 orientation, ub4 mode));
1128:
1129: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
1130: ub4 stmt_len, ub4 language, ub4 mode));
1131:
1132: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
1133:
1134: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
1135:
1136: private: // conn client library funcs linking
1137:
1138: const char *dlink(const char *dlopen_file_spec) {
1139: if(lt_dlinit())
1140: return lt_dlerror();
1141: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
1142: if(!handle)
1143: return lt_dlerror(); //"can not open the dynamic link module";
1144:
1145: #define DSLINK(name, action) \
1146: name=(t_##name)lt_dlsym(handle, #name); \
1147: if(!name) \
1148: action;
1149:
1150: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
1151:
1152: OCI_LINK(Initialize);
1153: OCI_LINK(EnvInit);
1154: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
1.59 paf 1155: OCI_LINK(BindByPos); OCI_LINK(BindByName); OCI_LINK(BindDynamic);
1.1 parser 1156: OCI_LINK(DefineByPos);
1157: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
1158: OCI_LINK(ErrorGet);
1159: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
1160: OCI_LINK(LobGetLength);
1161: OCI_LINK(LobRead); OCI_LINK(LobWrite);
1162: OCI_LINK(ParamGet);
1163: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
1164: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
1165: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
1166: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
1167:
1168: return 0;
1169: }
1170:
1171: } *OracleSQL_driver;
1172:
1.49 paf 1173: void check(Connection& connection, const char *step, sword status) {
1.1 parser 1174:
1175: const char *msg;
1176: char reason[MAX_STRING/2];
1177:
1178: switch (status) {
1.22 paf 1179: case OCI_SUCCESS: // hurrah
1180: case OCI_SUCCESS_WITH_INFO: // ignoring. example: count(column) when column contains NULLs,
1181: // count() not counting them and gives that status
1182: return;
1.1 parser 1183: case OCI_ERROR:
1184: {
1.45 paf 1185: sb4 errcode;
1.49 paf 1186: if(OracleSQL_driver->OCIErrorGet((dvoid *)connection.errhp, (ub4)1, (text *)NULL, &errcode,
1.45 paf 1187: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS) {
1188: msg=reason;
1189:
1.69 misha 1190: // transcode server error message from ?ClientCharset to $request:charset
1191: if(msg && connection.options.client_charset && strcmp(connection.options.client_charset, connection.services->request_charset())!=0){
1192: if(size_t msg_length=strlen(msg)){
1193: connection.services->transcode(msg, msg_length,
1194: msg, msg_length,
1195: connection.options.client_charset,
1196: connection.services->request_charset());
1.42 paf 1197: }
1198: }
1.45 paf 1199: } else
1200: msg="[can not get error description]";
1201: break;
1.1 parser 1202: }
1203: case OCI_NEED_DATA:
1204: msg="NEED_DATA"; break;
1205: case OCI_NO_DATA:
1206: msg="NODATA"; break;
1207: case OCI_INVALID_HANDLE:
1208: msg="INVALID_HANDLE"; break;
1209: case OCI_STILL_EXECUTING:
1210: msg="STILL_EXECUTE"; break;
1211: case OCI_CONTINUE:
1212: msg="CONTINUE"; break;
1213: default:
1214: msg="unknown"; break;
1215: }
1216:
1.49 paf 1217: snprintf(connection.error, sizeof(connection.error), "%s (%s, %d)",
1.22 paf 1218: msg, step, (int)status);
1.49 paf 1219: longjmp(connection.mark, 1);
1.1 parser 1220: }
1221:
1.60 paf 1222: void fail(Connection& connection, const char* msg) {
1223: snprintf(connection.error, sizeof(connection.error), "%s", msg);
1224: longjmp(connection.mark, 1);
1225: }
1226:
1.49 paf 1227: void check(Connection& connection, bool error) {
1.27 paf 1228: if(error)
1.49 paf 1229: longjmp(connection.mark, 1);
1.27 paf 1230: }
1.1 parser 1231:
1232: /* ----------------------------------------------------------------- */
1233: /* Intbind callback that does not do any data input. */
1234: /* ----------------------------------------------------------------- */
1.60 paf 1235: sb4 cbf_no_data(
1.45 paf 1236: dvoid* /*ctxp*/,
1237: OCIBind* /*bindp*/,
1238: ub4 /*iter*/, ub4 /*index*/,
1.1 parser 1239: dvoid **bufpp,
1240: ub4 *alenpp,
1241: ub1 *piecep,
1242: dvoid **indpp) {
1243: *bufpp=(dvoid *)0;
1244: *alenpp=0;
1245: static sb2 null_ind=-1;
1246: *indpp=(dvoid *) &null_ind;
1247: *piecep=OCI_ONE_PIECE;
1248:
1249: return OCI_CONTINUE;
1250: }
1251:
1252: /* ----------------------------------------------------------------- */
1253: /* Outbind callback for returning data. */
1254: /* ----------------------------------------------------------------- */
1255: static sb4 cbf_get_data(dvoid *ctxp,
1256: OCIBind *bindp,
1.45 paf 1257: ub4 /*iter*/, ub4 index,
1.1 parser 1258: dvoid **bufpp,
1259: ub4 **alenp,
1260: ub1 *piecep,
1261: dvoid **indpp,
1262: ub2 **rcodepp) {
1.60 paf 1263: Query_lobs::Item& context=*static_cast<Query_lobs::Item*>(ctxp);
1.1 parser 1264:
1265: if(index==0) {
1266: static ub4 rows;
1.49 paf 1267: check(*context.connection, "AttrGet cbf_get_data ROWS_RETURNED",
1.1 parser 1268: OracleSQL_driver->OCIAttrGet(
1269: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
1.49 paf 1270: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.connection->errhp)) ;
1.57 paf 1271: context.rows.count=(ub2)rows;
1.60 paf 1272: context.rows.row=(Query_lobs::return_rows::return_row *)
1273: context.connection->services->malloc_atomic(sizeof(Query_lobs::return_rows::return_row)*rows);
1.1 parser 1274: }
1275:
1.60 paf 1276: Query_lobs::return_rows::return_row &var=context.rows.row[index];
1.1 parser 1277:
1.49 paf 1278: check(*context.connection, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1279: (dvoid *) context.connection->envhp, (dvoid **)&var.locator,
1.1 parser 1280: (ub4)OCI_DTYPE_LOB,
1281: 0, (dvoid **)0));
1282:
1283: *bufpp=var.locator;
1284: *alenp=&var.len;
1285: *indpp=(dvoid *) &var.ind;
1286: *piecep=OCI_ONE_PIECE;
1287: *rcodepp=&var.rcode;
1288:
1289: return OCI_CONTINUE;
1290: }
1291:
1292: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1293: return OracleSQL_driver=new OracleSQL_Driver();
1294: }