pike.git/lib/modules/Sql.pmod/pgsql_util.pmod:b3f1effc66b1d9252ccadd416711301511011524

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1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 /* * Some pgsql utility functions. * They are kept here to avoid circular references. */ //! The pgsql backend, shared between all connection instances. //! It runs even in non-callback mode in a separate thread and makes sure //! that communication with the database is real-time and event driven //! at all times. //! //! @note //! Callbacks running from this backend directly determine the latency //! in reacting to communication with the database server; so it //! would be prudent not to block in these callbacks. #pike __REAL_VERSION__ #pragma dynamic_dot #require constant(Thread.Thread) #include "pgsql.h" //! The instance of the pgsql dedicated backend. final Pike.Backend local_backend = Pike.SmallBackend(); private Thread.Mutex backendmux = Thread.Mutex(); private Thread.ResourceCount clientsregistered = Thread.ResourceCount(); constant emptyarray = ({}); constant describenodata = (["datarowdesc":emptyarray, "datarowtypes":emptyarray, "datatypeoid":emptyarray]); final multiset censoroptions=(<"use_ssl","force_ssl", "cache_autoprepared_statements","reconnect","text_query","is_superuser", "server_encoding","server_version","integer_datetimes", "session_authorization">); constant stdiobuftype = typeof(Stdio.Buffer()); /* Statements matching createprefix cause the prepared statement cache * to be flushed to prevent stale references to (temporary) tables */ final Regexp createprefix=iregexp("^\a*(CREATE|DROP)\a"); /* Statements matching dontcacheprefix never enter the cache */ private Regexp dontcacheprefix=iregexp("^\a*(FETCH|COPY)\a"); /* Statements not matching paralleliseprefix will cause the driver * to stall submission until all previously started statements have * run to completion */ private Regexp paralleliseprefix =iregexp("^\a*((SELEC|INSER)T|(UPDA|DELE)TE|(FETC|WIT)H)\a"); /* Statements matching transbeginprefix will cause the driver * insert a sync after the statement. * Failure to do so, will result in portal synchronisation errors * in the event of an ErrorResponse. */ final Regexp transbeginprefix =iregexp("^\a*(BEGIN|START)([; \t\f\r\n]|$)"); /* Statements matching transendprefix will cause the driver * insert a sync after the statement. * Failure to do so, will result in portal synchronisation errors * in the event of an ErrorResponse. */ final Regexp transendprefix =iregexp("^\a*(COMMIT|ROLLBACK|END)([; \t\f\r\n]|$)"); /* For statements matching execfetchlimit the resultrows will not be * fetched in pieces. This heuristic will be sub-optimal whenever * either an UPDATE/DELETE/INSERT statement is prefixed by WITH, or * if there is a RETURNING with a *lot* of results. In those cases * the portal will be busy until all results have been fetched, and will * not be able to deliver results belonging to other parallel queries * running on the same filedescriptor. * * However, considering that the current heuristic increases query-speed * in the majority of the real-world cases, it would be considered a good * tradeoff. */ private Regexp execfetchlimit =iregexp("^\a*((UPDA|DELE)TE|INSERT)\a|\aLIMIT\a+[1-9][; \t\f\r\n]*$"); private Regexp iregexp(string expr) { Stdio.Buffer ret=Stdio.Buffer(); foreach(expr;;int c) if(c>='A'&&c<='Z') ret->add('[',c,c+'a'-'A',']'); else if(c=='\a') // Replace with generic whitespace ret->add("[ \t\f\r\n]"); else ret->add_int8(c); return Regexp(ret->read()); } final void closestatement(bufcon|conxsess plugbuffer,string oldprep) { if(oldprep) { PD("Close statement %s\n",oldprep); CHAIN(plugbuffer)->add_int8('C')->add_hstring(({'S', oldprep, 0}), 4, 4); } } private void run_local_backend() { Thread.MutexKey lock; int looponce; do { looponce=0; if(lock=backendmux->trylock()) { PD("Starting local backend\n"); while (!clientsregistered->drained()) { // Autoterminate when not needed mixed err; if (err = catch(local_backend(4096.0))) werror(describe_backtrace(err)); } PD("Terminating local backend\n"); lock=0; looponce = !clientsregistered->drained(); } } while(looponce); } //! Registers yourself as a user of this backend. If the backend //! has not been started yet, it will be spawned automatically. final Thread.ResourceCountKey register_backend() { int startbackend = clientsregistered->drained(); Thread.ResourceCountKey key = clientsregistered->acquire(); if (startbackend) Thread.Thread(run_local_backend); return key; } final void throwdelayederror(object parent) { if(mixed err=parent._delayederror) { parent._delayederror=UNDEFINED; if(stringp(err)) err=({err,backtrace()[..<2]}); throw(err); } } final int oidformat(int oid) { switch(oid) { case BOOLOID: case BYTEAOID: case CHAROID: case INT8OID: case INT2OID: case INT4OID: case TEXTOID: case OIDOID: case XMLOID: case MACADDROID: case BPCHAROID: case VARCHAROID: case CTIDOID: case UUIDOID: return 1; //binary } return 0; // text } private inline mixed callout(function(mixed ...:void) f, float|int delay,mixed ... args) { return local_backend->call_out(f,delay,@args); } // Some pgsql utility functions class bufcon { inherit Stdio.Buffer; private Thread.ResourceCountKey dirty; #ifdef PG_DEBUGRACE final bufcon `chain() { return this; } #endif private conxion realbuffer; private void create(conxion _realbuffer) { realbuffer=_realbuffer; } final Thread.ResourceCount `stashcount() { return realbuffer->stashcount; } final bufcon start(void|int waitforreal) { dirty = realbuffer->stashcount->acquire(); #ifdef PG_DEBUG if(waitforreal) error("pgsql.bufcon not allowed here\n"); #endif return this; } final void sendcmd(int mode,void|sql_result portal) { Thread.MutexKey lock=realbuffer->shortmux->lock(); if (portal) realbuffer->stashqueue->write(portal); if (mode == SYNCSEND) { add(PGSYNC); realbuffer->stashqueue->write(1); mode = SENDOUT; // Demote it to prevent an extra SYNC upon stashflush } realbuffer->stash->add(this); PD("%d>Stashed mode %d > %d\n", realbuffer->socket->query_fd(), mode, realbuffer->stashflushmode); if (mode > realbuffer->stashflushmode) realbuffer->stashflushmode = mode; dirty = 0; this->clear(); if(lock=realbuffer->nostash->trylock(1)) { #ifdef PG_DEBUGRACE conxsess sess = conxsess(realbuffer); realbuffer->started = lock; lock = 0; sess->sendcmd(SENDOUT); #else realbuffer->started = lock; lock = 0; realbuffer->sendcmd(SENDOUT); #endif } } }; class conxiin { inherit Stdio.Buffer:i; final Thread.Condition fillread; final Thread.Mutex fillreadmux; final int procmsg; private int didreadcb; protected final bool range_error(int howmuch) { #ifdef PG_DEBUG if(howmuch<=0) error("Out of range %d\n",howmuch); #endif if(fillread) { Thread.MutexKey lock=fillreadmux->lock(); if(!didreadcb) fillread.wait(lock); didreadcb=0; lock=0; } else throw(MAGICTERMINATE); return true; } final int read_cb(mixed id,mixed b) { PD("Read callback %O\n", b && ((string)b) #ifndef PG_DEBUGMORE [..255] #endif ); Thread.MutexKey lock=fillreadmux->lock(); if(procmsg&&id) procmsg=0,lock=0,Thread.Thread(id); else if(fillread) didreadcb=1, fillread.signal(); lock=0; return 0; } private void create() { i::create(); fillreadmux=Thread.Mutex(); fillread=Thread.Condition(); } }; class sfile { inherit Stdio.File; final int query_fd() { return is_open() ? ::query_fd() : -1; } }; class conxion { inherit Stdio.Buffer:o; final conxiin i; private Thread.Queue qportals; final Thread.Mutex shortmux; private int closenext; final sfile socket; private function(void|mixed:void) connectfail; private int towrite; final multiset(function(void|mixed:void)) closecallbacks=(<>); final Thread.Mutex nostash; final Thread.MutexKey started; final Thread.Queue stashqueue; final Thread.Condition stashavail; final Stdio.Buffer stash; final int stashflushmode; final Thread.ResourceCount stashcount; final int synctransact; #ifdef PG_DEBUGRACE final mixed nostrack; #endif #ifdef PG_DEBUG final int queueoutidx; final int queueinidx=-1; #endif private inline void queueup(sql_result portal) { qportals->write(portal); portal->_synctransact=synctransact; PD("%d>%O %d %d Queue portal %d bytes\n",socket->query_fd(), portal._portalname,++queueoutidx,synctransact,sizeof(this)); } final bufcon|conxsess start(void|int waitforreal) { Thread.MutexKey lock; if(lock=(waitforreal?nostash->lock:nostash->trylock)(1)) { int mode; #ifdef PG_DEBUGRACE conxsess sess = conxsess(this); #endif started = lock; lock=shortmux->lock(); stashcount->wait_till_drained(lock); mode = getstash(KEEP); lock=0; if (mode > KEEP) sendcmd(mode); // Force out stash to the server #ifdef PG_DEBUGRACE return sess; #else return this; #endif } return bufcon(this)->start(); } private int write_cb() { Thread.MutexKey lock = shortmux->lock(); if (this) { // Guard against async destructs towrite -= output_to(socket, towrite); lock = 0; if (!i->fillread && !sizeof(this)) close(); } return 0; } private int getstash(int mode) { if (sizeof(stash)) { add(stash); stash->clear(); foreach (stashqueue->try_read_array();; int|sql_result portal) if (intp(portal)) qportals->write(synctransact++); else queueup(portal); PD("%d>Got stash mode %d > %d\n", socket->query_fd(), stashflushmode, mode); if (stashflushmode > mode) mode = stashflushmode; stashflushmode = KEEP; } return mode; } final void sendcmd(void|int mode, void|sql_result portal) { Thread.MutexKey lock; if (portal) queueup(portal); unfinalised: do { switch (mode) { default: break unfinalised; case SYNCSEND: PD("%d>Sync %d %d Queue\n", socket->query_fd(), synctransact, ++queueoutidx); add(PGSYNC); mode = SENDOUT; break; case FLUSHLOGSEND: PD("%d>%O %d Queue simplequery %d bytes\n", socket->query_fd(), portal._portalname, ++queueoutidx, sizeof(this)); mode = FLUSHSEND; } qportals->write(synctransact++); } while(0); lock = shortmux->lock(); mode = getstash(mode); catch { outer: do { switch(mode) { default: PD("%d>Skip flush %d Queue %O\n", socket->query_fd(), mode, (string)this); break outer; case FLUSHSEND: PD("Flush\n"); add(PGFLUSH); case SENDOUT:; } if(towrite=sizeof(this)) { PD("%d>Sendcmd %O\n",socket->query_fd(),((string)this)[..towrite-1]); towrite-=output_to(socket,towrite); } } while(0); lock=started=0; return; }; lock=0; catch(connectfail()); } final int close() { if(!closenext && nostash) { closenext=1; Thread.MutexKey lock=i->fillreadmux->lock(); if(i->fillread) { // Delayed close() after flushing the output buffer i->fillread.signal(); i->fillread=0; } lock=0; PD("%d>Delayed close, flush write\n",socket->query_fd()); i->read_cb(socket->query_id(),0); return 0; } else return -1; } private void _destruct() { PD("%d>Close conxion %d\n", socket ? socket->query_fd() : -1, !!nostash); int|.pgsql_util.sql_result portal; if (qportals) // CancelRequest does not use qportals while (portal = qportals->try_read()) if (objectp(portal)) portal->_purgeportal(); if(nostash) { catch { while(sizeof(closecallbacks)) foreach(closecallbacks;function(void|mixed:void) closecb;) closecb(); destruct(nostash); socket->set_nonblocking(); // Drop all callbacks PD("%d>Close socket\n",socket->query_fd()); socket->close(); }; } connectfail=0; } final void connectloop(object pgsqlsess, int nossl) { mixed err=catch { for(;;clear()) { socket->connect(pgsqlsess._host,pgsqlsess._port); #if constant(SSL.File) if(!nossl && !pgsqlsess->nossl && (pgsqlsess._options.use_ssl || pgsqlsess._options.force_ssl)) { PD("SSLRequest\n"); start()->add_int32(8)->add_int32(PG_PROTOCOL(1234,5679)) ->sendcmd(SENDOUT); switch(read_int8()) { case 'S': object fcon=SSL.File(socket,SSL.Context()); if(fcon->connect()) { socket=fcon; break; } default: PD("%d>Close socket short\n", socket->query_fd()); socket->close(); pgsqlsess.nossl=1; continue; case 'N': if(pgsqlsess._options.force_ssl) error("Encryption not supported on connection to %s:%d\n", pgsqlsess.host,pgsqlsess.port); } } #else if(pgsqlsess._options.force_ssl) error("Encryption library missing," " cannot establish connection to %s:%d\n", pgsqlsess.host,pgsqlsess.port); #endif break; } connectfail=pgsqlsess->_connectfail; if(!socket->is_open()) error(strerror(socket->errno())+".\n"); socket->set_backend(local_backend); socket->set_buffer_mode(i,0); socket->set_nonblocking(i->read_cb,write_cb,close); if (nossl != 2) { connectfail=pgsqlsess->_connectfail; Thread.Thread(pgsqlsess->_processloop,this); } return; }; catch(connectfail(err)); } private string _sprintf(int type) { string res=UNDEFINED; switch(type) { case 'O': int fd=-1; if(socket) catch(fd=socket->query_fd()); res=predef::sprintf("conxion fd: %d input queue: %d/%d " "queued portals: %d output queue: %d/%d\n" "started: %d\n", fd,sizeof(i),i->_size_object(), qportals && qportals->size(), sizeof(this), _size_object(), !!started); break; } return res; } private void create(object pgsqlsess,Thread.Queue _qportals,int nossl) { o::create(); qportals = _qportals; synctransact = 1; socket=sfile(); i=conxiin(); shortmux=Thread.Mutex(); nostash=Thread.Mutex(); closenext = 0; stashavail=Thread.Condition(); stashqueue=Thread.Queue(); stash=Stdio.Buffer(); stashcount = Thread.ResourceCount(); Thread.Thread(connectloop,pgsqlsess,nossl); } }; #ifdef PG_DEBUGRACE class conxsess { final conxion chain; private void create(conxion parent) { if (parent->started) werror("Overwriting conxsess %s %s\n", describe_backtrace(({"new ", backtrace()[..<1]})), describe_backtrace(({"old ", parent->nostrack}))); parent->nostrack = backtrace(); chain = parent; } final void sendcmd(int mode,void|sql_result portal) { chain->sendcmd(mode, portal); chain = 0; } private void _destruct() { if (chain) werror("Untransmitted conxsess %s\n", describe_backtrace(({"", backtrace()[..<1]}))); } }; #endif //! The result object returned by @[Sql.pgsql()->big_query()], except for //! the noted differences it behaves the same as @[Sql.sql_result]. //! //! @seealso //! @[Sql.sql_result], @[Sql.pgsql], @[Sql.Sql], @[Sql.pgsql()->big_query()] class sql_result { inherit __builtin.Sql.Result; private object pgsqlsess; private int eoffound; private conxion c; private conxiin cr; final mixed _delayederror; final int _state; final int _fetchlimit; private int alltext; final int _forcetext; private int syncparse; private int transtype; final string _portalname; private int rowsreceived; private int inflight; private int portalbuffersize; private Thread.Mutex closemux; private Thread.Queue datarows; private Thread.ResourceCountKey stmtifkey, portalsifkey; private array(mapping(string:mixed)) datarowdesc; private array(int) datarowtypes; // types from datarowdesc private string statuscmdcomplete; private int bytesreceived; final int _synctransact; final Thread.Condition _ddescribe; final Thread.Mutex _ddescribemux; final Thread.MutexKey _unnamedportalkey,_unnamedstatementkey; final array _params; final string _query; final string _preparedname; final mapping(string:mixed) _tprepared; private function(:void) gottimeout; private int timeout; protected string _sprintf(int type) { string res=UNDEFINED; switch(type) { case 'O': int fd=-1; if(c&&c->socket) catch(fd=c->socket->query_fd()); res=sprintf("sql_result state: %d numrows: %d eof: %d inflight: %d\n" "query: %O\n" "fd: %O portalname: %O datarows: %d" " synctransact: %d laststatus: %s\n", _state,rowsreceived,eoffound,inflight, _query,fd,_portalname,datarowtypes&&sizeof(datarowtypes), _synctransact, statuscmdcomplete||(_unnamedstatementkey?"*parsing*":"")); break; } return res; } protected void create(object _pgsqlsess,conxion _c,string query, int _portalbuffersize,int alltyped,array params,int forcetext, int _timeout, int _syncparse, int _transtype) { pgsqlsess = _pgsqlsess; cr = (c = _c)->i; _query = query; datarows = Thread.Queue(); _ddescribe=Thread.Condition(); _ddescribemux=Thread.Mutex(); closemux=Thread.Mutex(); portalbuffersize=_portalbuffersize; alltext = !alltyped; _params = params; _forcetext = forcetext; _state = PORTALINIT; timeout = _timeout; syncparse = _syncparse; gottimeout = _pgsqlsess->cancelquery; c->closecallbacks+=(<_destruct>); transtype = _transtype; } //! Returns the command-complete status for this query. //! //! @seealso //! @[affected_rows()] //! //! @note //! This function is PostgreSQL-specific, and thus it is not available //! through the generic SQL-interface. /*semi*/final string status_command_complete() { return statuscmdcomplete; } //! Returns the number of affected rows by this query. //! //! @seealso //! @[status_command_complete()] //! //! @note //! This function is PostgreSQL-specific, and thus it is not available //! through the generic SQL-interface. /*semi*/final int affected_rows() { int rows; if(statuscmdcomplete) sscanf(statuscmdcomplete,"%*s %d",rows); return rows; } final void _storetiming() { if(_tprepared) { _tprepared.trun=gethrtime()-_tprepared.trunstart; m_delete(_tprepared,"trunstart"); _tprepared = UNDEFINED; } } private void waitfordescribe() { Thread.MutexKey lock=_ddescribemux->lock(); if(!datarowtypes) PT(_ddescribe->wait(lock)); lock=0; } //! @seealso //! @[Sql.sql_result()->num_fields()] /*semi*/final int num_fields() { if(!datarowtypes) waitfordescribe(); trydelayederror(); return sizeof(datarowtypes); } //! @note //! This method returns the number of rows already received from //! the database for the current query. Note that this number //! can still increase between subsequent calls if the results from //! the query are not complete yet. This function is only guaranteed to //! return the correct count after EOF has been reached. //! @seealso //! @[Sql.sql_result()->num_rows()] /*semi*/final int num_rows() { trydelayederror(); return rowsreceived; } private inline void trydelayederror() { if(_delayederror) throwdelayederror(this); } //! @seealso //! @[Sql.sql_result()->eof()] /*semi*/final int eof() { trydelayederror(); return eoffound; } //! @seealso //! @[Sql.sql_result()->fetch_fields()] /*semi*/final array(mapping(string:mixed)) fetch_fields() { if(!datarowtypes) waitfordescribe(); trydelayederror(); return datarowdesc+emptyarray; } #ifdef PG_DEBUG #define INTVOID int #else #define INTVOID void #endif final INTVOID _decodedata(int msglen,string cenc) { _storetiming(); _releasestatement(); string serror; bytesreceived+=msglen; int cols=cr->read_int16(); array a=allocate(cols,!alltext&&Val.null); #ifdef PG_DEBUG msglen-=2+4*cols; #endif foreach(datarowtypes;int i;int typ) { int collen=cr->read_sint(4); if(collen>0) { #ifdef PG_DEBUG msglen-=collen; #endif mixed value; switch(typ) { case FLOAT4OID: #if SIZEOF_FLOAT>=8 case FLOAT8OID: #endif if(!alltext) { value=(float)cr->read(collen); break; } default:value=cr->read(collen); break; case CHAROID: value=alltext?cr->read(1):cr->read_int8(); break; case BOOLOID:value=cr->read_int8(); switch(value) { case 'f':value=0; break; case 't':value=1; } if(alltext) value=value?"t":"f"; break; case TEXTOID: case BPCHAROID: case VARCHAROID: value=cr->read(collen); if(cenc==UTF8CHARSET && catch(value=utf8_to_string(value)) && !serror) serror=SERROR("%O contains non-%s characters\n", value,UTF8CHARSET); break; case INT8OID:case INT2OID: case OIDOID:case INT4OID: if(_forcetext) { value=cr->read(collen); if(!alltext) value=(int)value; } else { switch(typ) { case INT8OID:value=cr->read_sint(8); break; case INT2OID:value=cr->read_sint(2); break; case OIDOID: case INT4OID:value=cr->read_sint(4); } if(alltext) value=(string)value; } } a[i]=value; } else if(!collen) a[i]=""; } _processdataready(a); if(serror) error(serror); #ifdef PG_DEBUG return msglen; #endif } final void _setrowdesc(array(mapping(string:mixed)) drowdesc, array(int) drowtypes) { Thread.MutexKey lock=_ddescribemux->lock(); datarowdesc=drowdesc; datarowtypes=drowtypes; _ddescribe->broadcast(); lock=0; } final void _preparebind(array dtoid) { array(string|int) paramValues=_params?_params[2]:({}); if(sizeof(dtoid)!=sizeof(paramValues)) SUSERERROR("Invalid number of bindings, expected %d, got %d\n", sizeof(dtoid),sizeof(paramValues)); Thread.MutexKey lock=_ddescribemux->lock(); if(!_portalname) { _portalname=(_unnamedportalkey=pgsqlsess._unnamedportalmux->trylock(1)) ? "" : PORTALPREFIX #ifdef PG_DEBUG +(string)(c->socket->query_fd())+"_" #endif +int2hex(pgsqlsess._pportalcount++); lock=0; #ifdef PG_DEBUGMORE PD("ParamValues to bind: %O\n",paramValues); #endif Stdio.Buffer plugbuffer=Stdio.Buffer(); { array dta=({sizeof(dtoid)}); plugbuffer->add(_portalname,0,_preparedname,0) ->add_ints(dta+map(dtoid,oidformat)+dta,2); } string cenc=pgsqlsess._runtimeparameter[CLIENT_ENCODING]; foreach(paramValues;int i;mixed value) { if(undefinedp(value) || objectp(value)&&value->is_val_null) plugbuffer->add_int32(-1); // NULL else if(stringp(value) && !sizeof(value)) { int k=0; switch(dtoid[i]) { default: k=-1; // cast empty strings to NULL for non-string types case BYTEAOID: case TEXTOID: case XMLOID: case BPCHAROID: case VARCHAROID:; } plugbuffer->add_int32(k); } else switch(dtoid[i]) { case TEXTOID: case BPCHAROID: case VARCHAROID: { if(!value) { plugbuffer->add_int32(-1); break; } value=(string)value; switch(cenc) { case UTF8CHARSET: value=string_to_utf8(value); break; default: if(String.width(value)>8) { SUSERERROR("Don't know how to convert %O to %s encoding\n", value,cenc); value=""; } } plugbuffer->add_hstring(value,4); break; } default: { if(!value) { plugbuffer->add_int32(-1); break; } if (!objectp(value) || typeof(value) != stdiobuftype) /* * Like Oracle and SQLite, we accept literal binary values * from single-valued multisets. */ if (multisetp(value) && sizeof(value) == 1) value = indices(value)[0]; else { value = (string)value; if (String.width(value) > 8) if (dtoid[i] == BYTEAOID) /* * FIXME We should throw an error here, it would * have been correct, but for historical reasons and * as a DWIM convenience we autoconvert to UTF8 here. */ value = string_to_utf8(value); else { SUSERERROR( "Wide string %O not supported for type OID %d\n", value,dtoid[i]); value=""; } } plugbuffer->add_hstring(value,4); break; } case BOOLOID: do { int tval; if(stringp(value)) tval=value[0]; else if(!intp(value)) { value=!!value; // cast to boolean break; } else tval=value; switch(tval) { case 'o':case 'O': catch { tval=value[1]; value=tval=='n'||tval=='N'; }; break; default: value=1; break; case 0:case '0':case 'f':case 'F':case 'n':case 'N': value=0; break; } } while(0); plugbuffer->add_int32(1)->add_int8(value); break; case CHAROID: if(intp(value)) plugbuffer->add_hstring(value,4); else { value=(string)value; switch(sizeof(value)) { default: SUSERERROR( "\"char\" types must be 1 byte wide, got %O\n",value); case 0: plugbuffer->add_int32(-1); // NULL break; case 1: plugbuffer->add_hstring(value[0],4); } } break; case INT8OID: plugbuffer->add_int32(8)->add_int((int)value,8); break; case OIDOID: case INT4OID: plugbuffer->add_int32(4)->add_int32((int)value); break; case INT2OID: plugbuffer->add_int32(2)->add_int16((int)value); break; } } if(!datarowtypes) { if(_tprepared && dontcacheprefix->match(_query)) m_delete(pgsqlsess->_prepareds,_query),_tprepared=0; waitfordescribe(); } if(_state>=CLOSING) lock=_unnamedstatementkey=0; else { plugbuffer->add_int16(sizeof(datarowtypes)); if(sizeof(datarowtypes)) plugbuffer->add_ints(map(datarowtypes,oidformat),2); else if (syncparse < 0 && !pgsqlsess->_wasparallelisable && !pgsqlsess->_statementsinflight->drained(1)) { lock = pgsqlsess->_shortmux->lock(); PD("Commit waiting for statements to finish\n"); catch(PT(pgsqlsess->_statementsinflight->wait_till_drained(lock, 1))); } lock=0; PD("Bind portal %O statement %O\n",_portalname,_preparedname); _fetchlimit=pgsqlsess->_fetchlimit; _bindportal(); conxsess bindbuffer = c->start(); _unnamedstatementkey=0; CHAIN(bindbuffer)->add_int8('B')->add_hstring(plugbuffer, 4, 4); if(!_tprepared && sizeof(_preparedname)) closestatement(CHAIN(bindbuffer), _preparedname); _sendexecute(_fetchlimit && !(transtype != NOTRANS || sizeof(_query)>=MINPREPARELENGTH && execfetchlimit->match(_query)) && _fetchlimit,bindbuffer); } } else lock=0; } final void _processrowdesc(array(mapping(string:mixed)) datarowdesc, array(int) datarowtypes) { _setrowdesc(datarowdesc,datarowtypes); if(_tprepared) { _tprepared.datarowdesc=datarowdesc; _tprepared.datarowtypes=datarowtypes; } } final void _parseportal() { Thread.MutexKey lock = closemux->lock(); _state=PARSING; Thread.MutexKey lockc = pgsqlsess->_shortmux->lock(); if (syncparse || syncparse < 0 && pgsqlsess->_wasparallelisable) { PD("Commit waiting for statements to finish\n"); catch(PT(pgsqlsess->_statementsinflight->wait_till_drained(lockc))); } stmtifkey = pgsqlsess->_statementsinflight->acquire(); lockc = 0; lock=0; statuscmdcomplete=UNDEFINED; pgsqlsess->_wasparallelisable = paralleliseprefix->match(_query); } final void _releasestatement(void|int nolock) { Thread.MutexKey lock; if (!nolock) lock = closemux->lock(); if (_state <= BOUND) { _state = COMMITTED; stmtifkey = 0; } lock = 0; } final void _bindportal() { Thread.MutexKey lock = closemux->lock(); _state=BOUND; portalsifkey = pgsqlsess->_portalsinflight->acquire(); lock=0; } final void _purgeportal() { PD("Purge portal\n"); datarows->write(1); // Signal EOF Thread.MutexKey lock=closemux->lock(); _fetchlimit=0; // disables further Executes switch(_state) { case COPYINPROGRESS: case COMMITTED: case BOUND: portalsifkey = 0; } switch(_state) { case BOUND: case PARSING: stmtifkey = 0; } _state=CLOSED; lock=0; releaseconditions(); } final int _closeportal(conxsess cs) { object plugbuffer = CHAIN(cs); int retval=KEEP; PD("%O Try Closeportal %d\n",_portalname,_state); Thread.MutexKey lock=closemux->lock(); _fetchlimit=0; // disables further Executes switch(_state) { case PARSING: case BOUND: _releasestatement(1); } switch(_state) { case PORTALINIT: case PARSING: _unnamedstatementkey=0; _state=CLOSING; break; case COPYINPROGRESS: PD("CopyDone\n"); plugbuffer->add("c\0\0\0\4"); case COMMITTED: case BOUND: _state=CLOSING; lock=0; PD("Close portal %O\n",_portalname); if (_portalname && sizeof(_portalname)) { plugbuffer->add_int8('C')->add_hstring(({'P',_portalname,0}),4,4); retval=FLUSHSEND; } else _unnamedportalkey=0; portalsifkey = 0; if (pgsqlsess->_portalsinflight->drained()) { if (plugbuffer->stashcount->drained() && transtype != TRANSBEGIN) /* * stashcount will be non-zero if a parse request has been queued * before the close was initiated. * It's a bit of a tricky race, but this check should be sufficient. */ pgsqlsess->_readyforquerycount++, retval=SYNCSEND; pgsqlsess->_pportalcount=0; } } lock=0; return retval; } final void _processdataready(array datarow,void|int msglen) { bytesreceived+=msglen; inflight--; if(_state<CLOSED) datarows->write(datarow); if(++rowsreceived==1) PD("<%O _fetchlimit %d=min(%d||1,%d), inflight %d\n",_portalname, _fetchlimit,(portalbuffersize>>1)*rowsreceived/bytesreceived, pgsqlsess._fetchlimit,inflight); if(_fetchlimit) { _fetchlimit= min((portalbuffersize>>1)*rowsreceived/bytesreceived||1, pgsqlsess._fetchlimit); Thread.MutexKey lock=closemux->lock(); if(_fetchlimit && inflight<=(_fetchlimit-1)>>1) _sendexecute(_fetchlimit); else if(!_fetchlimit) PD("<%O _fetchlimit %d, inflight %d, skip execute\n", _portalname,_fetchlimit,inflight); lock=0; } } private void releaseconditions() { _unnamedportalkey=_unnamedstatementkey=0; pgsqlsess=0; if(!datarowtypes) { Thread.MutexKey lock=_ddescribemux->lock(); datarowtypes=emptyarray; datarowdesc=emptyarray; _ddescribe->broadcast(); lock=0; } } final void _releasesession(void|string statusccomplete) { c->closecallbacks-=(<_destruct>); if(statusccomplete && !statuscmdcomplete) statuscmdcomplete=statusccomplete; inflight=0; conxsess plugbuffer; if (!catch(plugbuffer = c->start())) plugbuffer->sendcmd(_closeportal(plugbuffer)); _state=CLOSED; datarows->write(1); // Signal EOF releaseconditions(); } protected void _destruct() { catch { // inside destructors, exceptions don't work _releasesession(); }; } final void _sendexecute(int fetchlimit,void|bufcon|conxsess plugbuffer) { int flushmode; PD("Execute portal %O fetchlimit %d transtype %d\n", _portalname, fetchlimit, transtype); if(!plugbuffer) plugbuffer=c->start(1); CHAIN(plugbuffer)->add_int8('E')->add_hstring(({_portalname,0}), 4, 8) ->add_int32(fetchlimit); if (!fetchlimit) { if (transtype != NOTRANS) pgsqlsess._intransaction = transtype == TRANSBEGIN; flushmode = _closeportal(plugbuffer) == SYNCSEND || transtype == TRANSEND ? SYNCSEND : FLUSHSEND; } else inflight+=fetchlimit, flushmode=FLUSHSEND; plugbuffer->sendcmd(flushmode,this); } //! @returns //! One result row at a time. //! //! When using COPY FROM STDOUT, this method returns one row at a time //! as a single string containing the entire row. //! //! @seealso //! @[eof()], @[send_row()] /*semi*/final array(mixed) fetch_row() { int|array datarow; if(arrayp(datarow=datarows->try_read())) return datarow; if(!eoffound) { if(!datarow) { PD("%O Block for datarow\n",_portalname); array cid=callout(gottimeout,timeout); PT(datarow=datarows->read()); local_backend->remove_call_out(cid); if(arrayp(datarow)) return datarow; } eoffound=1; datarows->write(1); // Signal EOF for other threads } trydelayederror(); return 0; } //! @returns //! Multiple result rows at a time (at least one). //! //! When using COPY FROM STDOUT, this method returns one row at a time //! as a single string containing the entire row. //! //! @seealso //! @[eof()], @[fetch_row()] /*semi*/final array(array(mixed)) fetch_row_array() { if(eoffound) return 0; array(array|int) datarow=datarows->try_read_array(); if(!datarow) { array cid=callout(gottimeout,timeout); PT(datarow=datarows->read_array()); local_backend->remove_call_out(cid); } if(arrayp(datarow[-1])) return datarow; trydelayederror(); eoffound=1; datarows->write(1); // Signal EOF for other threads return (datarow=datarow[..<1]); } //! @param copydata //! When using COPY FROM STDIN, this method accepts a string or an //! array of strings to be processed by the COPY command; when sending //! the amount of data sent per call does not have to hit row or column //! boundaries. //! //! The COPY FROM STDIN sequence needs to be completed by either //! explicitly or implicitly destroying the result object, or by passing no //! argument to this method. //! //! @seealso //! @[fetch_row()], @[eof()] /*semi*/final void send_row(void|string|array(string) copydata) { trydelayederror(); if(copydata) { PD("CopyData\n"); object cs = c->start(); CHAIN(cs)->add_int8('d')->add_hstring(copydata, 4, 4); cs->sendcmd(SENDOUT); } else _releasesession(); } private void run_result_cb( function(sql_result, array(mixed), mixed ...:void) callback, array(mixed) args) { int|array datarow; for(;;) { array cid=callout(gottimeout,timeout); PT(datarow=datarows->read()); local_backend->remove_call_out(cid); if(!arrayp(datarow)) break; callout(callback, 0, this, datarow, @args); } trydelayederror(); eoffound=1; callout(callback, 0, this, 0, @args); } //! Sets up a callback for every row returned from the database. //! First argument passed is the resultobject itself, second argument //! is the result row (zero on EOF). //! //! @seealso //! @[fetch_row()] /*semi*/final void set_result_callback( function(sql_result, array(mixed), mixed ...:void) callback, mixed ... args) { if(callback) Thread.Thread(run_result_cb,callback,args); } private void run_result_array_cb( function(sql_result, array(array(mixed)), mixed ...:void) callback, array(mixed) args) { array(array|int) datarow; for(;;) { array cid=callout(gottimeout,timeout); PT(datarow=datarows->read_array()); local_backend->remove_call_out(cid); if(!datarow || !arrayp(datarow[-1])) break; callout(callback, 0, this, datarow, @args); } trydelayederror(); eoffound=1; if(sizeof(datarow)>1) callout(callback, 0, this, datarow=datarow[..<1], @args); callout(callback, 0, this, 0, @args); } //! Sets up a callback for sets of rows returned from the database. //! First argument passed is the resultobject itself, second argument //! is the array of result rows (zero on EOF). //! //! @seealso //! @[fetch_row()] /*semi*/final void set_result_array_callback( function(sql_result, array(array(mixed)), mixed ...:void) callback, mixed ... args) { if(callback) Thread.Thread(run_result_array_cb,callback,args); } };

pike.git/ lib/ modules/ Sql.pmod/ pgsql_util.pmod > b3f1effc66b1d9252ccadd416711301511011524 [Annotate]