ecbab12008-07-27Stephen R. van den Berg /* * Some pgsql utility functions. * They are kept here to avoid circular references. */ #pike __REAL_VERSION__ #include "pgsql.h"
cff3a32014-09-12Stephen R. van den Berg //! //! The pgsql backend, shared between all connection instances. //! It even runs in non-callback mode. //!
ecbab12008-07-27Stephen R. van den Berg 
fb8eb42014-10-31Stephen R. van den Berg protected Thread.Mutex backendmux = Thread.Mutex(); final Pike.Backend local_backend = Pike.SmallBackend();
cff3a32014-09-12Stephen R. van den Berg protected int clientsregistered;
fb8eb42014-10-31Stephen R. van den Berg multiset cachealways=(<"BEGIN","begin","END","end","COMMIT","commit">); object createprefix =Regexp("^[ \t\f\r\n]*[Cc][Rr][Ee][Aa][Tt][Ee][ \t\f\r\n]"); protected object dontcacheprefix =Regexp("^[ \t\f\r\n]*([Ff][Ee][Tt][Cc][Hh]|[Cc][Oo][Pp][Yy])[ \t\f\r\n]"); protected object execfetchlimit =Regexp("^[ \t\f\r\n]*(([Uu][Pp][Dd][Aa]|[Dd][Ee][Ll][Ee])[Tt][Ee]|\ [Ii][Nn][Ss][Ee][Rr][Tt])[ \t\f\r\n]|\ [ \t\f\r\n][Ll][Ii][Mm][Ii][Tt][ \t\f\r\n]+[12][; \t\f\r\n]*$"); final void closestatement(object plugbuffer,string oldprep) { if(oldprep) { PD("Close statement %s\n",oldprep); plugbuffer->add_int8('C')->add_hstring(({'S',oldprep,0}),4,4); } }
cff3a32014-09-12Stephen R. van den Berg protected void run_local_backend() { Thread.MutexKey lock; int looponce; do { looponce=0; if(lock=backendmux->trylock()) { PD("Starting local backend\n"); while(clientsregistered) // Autoterminate when not needed local_backend(4096.0); PD("Terminating local backend\n"); lock=0; looponce=clientsregistered; } } while(looponce); }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg protected void create() { }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg final void register_backend() { if(!clientsregistered++) Thread.Thread(run_local_backend); }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg final void unregister_backend() { --clientsregistered; }
4741cd2008-07-31Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg final void throwdelayederror(object parent) { if(mixed err=parent._delayederror) { parent._delayederror=UNDEFINED; if(stringp(err)) err=({err,backtrace()[..<2]}); throw(err);
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg }
ecbab12008-07-27Stephen R. van den Berg 
fb8eb42014-10-31Stephen R. van den Berg 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 }
cff3a32014-09-12Stephen R. van den Berg protected sctype mergemode(PGassist realbuffer,sctype mode) {
4ef8a32014-10-29Stephen R. van den Berg  if(mode>realbuffer->stashflushmode) realbuffer->stashflushmode=mode; return realbuffer->stashflushmode;
cff3a32014-09-12Stephen R. van den Berg }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg //! Some pgsql utility functions
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg class PGplugbuffer { inherit Stdio.Buffer;
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  protected PGassist realbuffer;
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  final void create(PGassist _realbuffer) { realbuffer=_realbuffer;
ecbab12008-07-27Stephen R. van den Berg  }
d432822008-07-31Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  final PGplugbuffer start(void|int waitforreal) { realbuffer->stashcount++; #ifdef PG_DEBUG if(waitforreal) error("pgsql.PGplugbuffer not allowed here\n");
d432822008-07-31Stephen R. van den Berg #endif
cff3a32014-09-12Stephen R. van den Berg  return this; } final void sendcmd(void|sctype mode,void|object portal) { Thread.MutexKey lock=realbuffer->stashupdate->lock(); if(portal) realbuffer->stashqueue->write(portal); realbuffer->stash->add(this); mode=mergemode(realbuffer,mode); if(!--realbuffer->stashcount) realbuffer->stashavail.signal(); lock=0; this->clear(); if(lock=realbuffer->nostash->trylock(1)) { realbuffer->started=lock; lock=0; realbuffer->sendcmd(sendout); }
d432822008-07-31Stephen R. van den Berg  }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg class PGassist { inherit Stdio.Buffer:i; inherit Stdio.Buffer:o;
fb8eb42014-10-31Stephen R. van den Berg  protected Thread.Condition fillread; protected Thread.Mutex fillreadmux;
cff3a32014-09-12Stephen R. van den Berg  protected Thread.Queue qportals; final Stdio.File socket; protected int towrite; final function(:void) gottimeout; final int timeout; Thread.Mutex nostash; Thread.MutexKey started; Thread.Mutex stashupdate; Thread.Queue stashqueue; Thread.Condition stashavail; Stdio.Buffer stash; int stashflushmode; int stashcount;
4ef8a32014-10-29Stephen R. van den Berg  int synctransact;
cff3a32014-09-12Stephen R. van den Berg #ifdef PG_DEBUG int queueoutidx; int queueinidx;
ecbab12008-07-27Stephen R. van den Berg #endif
4ef8a32014-10-29Stephen R. van den Berg  inline void queueup(pgsql_result portal) { qportals->write(portal); portal->_synctransact=synctransact; PD(">%O %d %d Queue portal %d bytes\n",portal._portalname,++queueoutidx, synctransact,sizeof(this)); }
cff3a32014-09-12Stephen R. van den Berg  final PGassist|PGplugbuffer start(void|int waitforreal) { Thread.MutexKey lock; if(lock=(waitforreal?nostash->lock:nostash->trylock)(1)) { started=lock; lock=stashupdate->lock();
4ef8a32014-10-29Stephen R. van den Berg  if(stashcount)
cff3a32014-09-12Stephen R. van den Berg  stashavail.wait(lock);
4ef8a32014-10-29Stephen R. van den Berg  add(stash); stash->clear(); foreach(stashqueue->try_read_array();;pgsql_result portal) queueup(portal);
cff3a32014-09-12Stephen R. van den Berg  lock=0; return this; } stashcount++; return PGplugbuffer(this);
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  protected final bool range_error(int howmuch) { if(!howmuch) return false; #ifdef PG_DEBUG if(howmuch<0) error("Out of range %d\n",howmuch); #endif
fb8eb42014-10-31Stephen R. van den Berg  if(fillread) {
cff3a32014-09-12Stephen R. van den Berg  array cid=local_backend->call_out(gottimeout,timeout);
fb8eb42014-10-31Stephen R. van den Berg  Thread.MutexKey lock=fillreadmux->lock(); fillread.wait(lock);
cff3a32014-09-12Stephen R. van den Berg  lock=0; local_backend->remove_call_out(cid); } else throw(MAGICTERMINATE); return true; } protected int read_cb(mixed id,mixed b) {
fb8eb42014-10-31Stephen R. van den Berg  Thread.MutexKey lock=fillreadmux->lock(); if(fillread) fillread.signal();
cff3a32014-09-12Stephen R. van den Berg  lock=0; return 0; } protected int write_cb() { towrite-=output_to(socket,towrite);
fb8eb42014-10-31Stephen R. van den Berg  if(!fillread && !sizeof(this))
cff3a32014-09-12Stephen R. van den Berg  socket->close(); return 0; } inline final int consume(int w) { return i::consume(w); } inline final int unread(int w) { return i::unread(w); } inline final string read(int w) { return i::read(w); } inline final object read_buffer(int w) { return i::read_buffer(w); } inline final int read_sint(int w) { return i::read_sint(w); } inline final int read_int8() { return i::read_int8(); } inline final int read_int16() { return i::read_int16(); } inline final int read_int32() { return i::read_int32(); } inline final string read_cstring() { return i::read_cstring(); } final void sendcmd(void|sctype mode,void|pgsql_result portal) {
4ef8a32014-10-29Stephen R. van den Berg  if(portal) queueup(portal); if(mode==flushlogsend) { mode=flushsend; qportals->write(synctransact++); PD(">%O %d Queue simplequery %d bytes\n",portal._portalname, ++queueoutidx,sizeof(this));
cff3a32014-09-12Stephen R. van den Berg  } if(started) { Thread.MutexKey lock=stashupdate->lock(); if(sizeof(stash)) { add(stash); stash->clear();
4ef8a32014-10-29Stephen R. van den Berg  foreach(stashqueue->try_read_array();;pgsql_result portal) queueup(portal);
cff3a32014-09-12Stephen R. van den Berg  } mode=mergemode(this,mode); stashflushmode=keep; lock=0; }
4ef8a32014-10-29Stephen R. van den Berg outer: do { switch(mode) { default: break outer; case syncsend: PD(">Sync %d %d Queue\n",synctransact,++queueoutidx); qportals->write(synctransact++); add(PGSYNC); break; case flushsend: PD("Flush\n"); add(PGFLUSH); case sendout:; } if(towrite=sizeof(this)) { PD(">Sendcmd %O\n",((string)this)[..towrite-1]); towrite-=output_to(socket,towrite); } } while(0);
cff3a32014-09-12Stephen R. van den Berg  started=0;
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  final void sendterminate() {
fb8eb42014-10-31Stephen R. van den Berg  destruct(fillread); // Delayed close() after flushing the output buffer
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  final int close() { return socket->close();
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  final void destroy() { catch(close()); // Exceptions don't work inside destructors
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  final void connectloop(object pgsqlsess,int nossl) { mixed err=catch { for(;;clear()) { socket->connect(pgsqlsess._host,pgsqlsess._port);
fc7f092014-06-01Martin Nilsson #if constant(SSL.File)
cff3a32014-09-12Stephen R. van den Berg  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: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; } socket->set_backend(local_backend); socket->set_buffer_mode(i::this,0); socket->set_nonblocking(read_cb,write_cb,0); Thread.Thread(pgsqlsess->_processloop,this); return; }; pgsqlsess->_connectfail(err); } void create(object pgsqlsess,Thread.Queue _qportals,int nossl) { i::create(); o::create(); qportals = _qportals;
4ef8a32014-10-29Stephen R. van den Berg  synctransact = 1;
fb8eb42014-10-31Stephen R. van den Berg  fillread=Thread.Condition(); fillreadmux=Thread.Mutex();
cff3a32014-09-12Stephen R. van den Berg  gottimeout=sendcmd; // Preset it with a NOP timeout=128; // Just a reasonable amount socket=Stdio.File(); nostash=Thread.Mutex(); stashupdate=Thread.Mutex(); stashqueue=Thread.Queue(); stashavail=Thread.Condition(); stash=Stdio.Buffer(); Thread.Thread(connectloop,pgsqlsess,nossl);
ecbab12008-07-27Stephen R. van den Berg  } }
f4c9d62009-02-15Stephen R. van den Berg //! The result object returned by @[Sql.pgsql()->big_query()], except for
0412962009-01-19Stephen R. van den Berg //! the noted differences it behaves the same as @[Sql.sql_result]. //! //! @seealso
f4c9d62009-02-15Stephen R. van den Berg //! @[Sql.sql_result], @[Sql.pgsql], @[Sql.Sql], @[Sql.pgsql()->big_query()]
ecbab12008-07-27Stephen R. van den Berg class pgsql_result {
11b13b2014-08-16Martin Nilsson  object _pgsqlsess;
cff3a32014-09-12Stephen R. van den Berg  protected int numrows; protected int eoffound; protected PGassist c; mixed _delayederror; portalstate _state;
11b13b2014-08-16Martin Nilsson  int _fetchlimit; int _alltext; int _forcetext;
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  string _portalname; int _bytesreceived; int _rowsreceived; int _inflight; int _portalbuffersize;
4ef8a32014-10-29Stephen R. van den Berg  int _synctransact;
fb8eb42014-10-31Stephen R. van den Berg  Thread.Condition _ddescribe; Thread.Mutex _ddescribemux;
cff3a32014-09-12Stephen R. van den Berg  Thread.MutexKey _unnamedportalkey,_unnamedstatementkey; protected Thread.Mutex closemux;
11b13b2014-08-16Martin Nilsson  array _params; string _statuscmdcomplete; string _query;
cff3a32014-09-12Stephen R. van den Berg  Thread.Queue _datarows;
fb8eb42014-10-31Stephen R. van den Berg  array(mapping(string:mixed)) _datarowdesc;
cff3a32014-09-12Stephen R. van den Berg  int _oldpbpos; object _plugbuffer; string _preparedname; mapping(string:mixed) _tprepared;
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  protected string _sprintf(int type, void|mapping flags) {
11b13b2014-08-16Martin Nilsson  string res=UNDEFINED;
cff3a32014-09-12Stephen R. van den Berg  switch(type) { case 'O': res=sprintf("pgsql_result numrows: %d eof: %d inflight: %d\n" #ifdef PG_DEBUGMORE "query: %O\n" #endif "portalname: %O datarows: %d" " laststatus: %s\n", numrows,eoffound,_inflight, #ifdef PG_DEBUGMORE _query, #endif
fb8eb42014-10-31Stephen R. van den Berg  _portalname,_datarowdesc&&sizeof(_datarowdesc),
cff3a32014-09-12Stephen R. van den Berg  _statuscmdcomplete||""); break;
11b13b2014-08-16Martin Nilsson  } return res;
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  void create(object pgsqlsess,PGassist _c,string query, int portalbuffersize,int alltyped,array params,int forcetext) {
11b13b2014-08-16Martin Nilsson  _pgsqlsess = pgsqlsess;
cff3a32014-09-12Stephen R. van den Berg  c = _c;
11b13b2014-08-16Martin Nilsson  _query = query;
cff3a32014-09-12Stephen R. van den Berg  _datarows = Thread.Queue(); numrows = UNDEFINED;
fb8eb42014-10-31Stephen R. van den Berg  _ddescribe=Thread.Condition(); _ddescribemux=Thread.Mutex();
cff3a32014-09-12Stephen R. van den Berg  closemux=Thread.Mutex();
11b13b2014-08-16Martin Nilsson  _portalbuffersize=portalbuffersize; _alltext = !alltyped; _params = params; _forcetext = forcetext;
cff3a32014-09-12Stephen R. van den Berg  _state = portalinit;
11b13b2014-08-16Martin Nilsson  }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  //! 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.
cff3a32014-09-12Stephen R. van den Berg  string status_command_complete() {
11b13b2014-08-16Martin Nilsson  return _statuscmdcomplete; }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  //! 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.
cff3a32014-09-12Stephen R. van den Berg  int affected_rows() {
11b13b2014-08-16Martin Nilsson  int rows; if(_statuscmdcomplete) sscanf(_statuscmdcomplete,"%*s %d",rows); return rows; }
ecbab12008-07-27Stephen R. van den Berg 
fb8eb42014-10-31Stephen R. van den Berg  protected void waitfordescribe() { Thread.MutexKey lock=_ddescribemux->lock(); if(!_datarowdesc) _ddescribe->wait(lock); lock=0; }
11b13b2014-08-16Martin Nilsson  //! @seealso //! @[Sql.sql_result()->num_fields()]
cff3a32014-09-12Stephen R. van den Berg  int num_fields() {
fb8eb42014-10-31Stephen R. van den Berg  if(!_datarowdesc) waitfordescribe(); trydelayederror();
11b13b2014-08-16Martin Nilsson  return sizeof(_datarowdesc); }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  //! @seealso //! @[Sql.sql_result()->num_rows()]
cff3a32014-09-12Stephen R. van den Berg  int num_rows() {
fb8eb42014-10-31Stephen R. van den Berg  trydelayederror(); return _rowsreceived;
11b13b2014-08-16Martin Nilsson  }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  protected inline void trydelayederror() { if(_delayederror) throwdelayederror(this); }
11b13b2014-08-16Martin Nilsson  //! @seealso //! @[Sql.sql_result()->eof()]
cff3a32014-09-12Stephen R. van den Berg  int eof() { trydelayederror();
11b13b2014-08-16Martin Nilsson  return eoffound; }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  //! @seealso //! @[Sql.sql_result()->fetch_fields()]
cff3a32014-09-12Stephen R. van den Berg  array(mapping(string:mixed)) fetch_fields() {
fb8eb42014-10-31Stephen R. van den Berg  if(!_datarowdesc) waitfordescribe();
cff3a32014-09-12Stephen R. van den Berg  trydelayederror();
11b13b2014-08-16Martin Nilsson  return _datarowdesc+({}); }
ecbab12008-07-27Stephen R. van den Berg 
fb8eb42014-10-31Stephen R. van den Berg  final void _setrowdesc(array(mapping(string:mixed)) datarowdesc) { _datarowdesc=datarowdesc; Thread.MutexKey lock=_ddescribemux->lock(); _ddescribe->broadcast(); lock=0; }
42fc8c2014-11-03Stephen R. van den Berg  final void _preparebind(array dtoid) {
fb8eb42014-10-31Stephen R. van den Berg  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)); #ifdef PG_DEBUGMORE PD("ParamValues to bind: %O\n",paramValues); #endif object plugbuffer=Stdio.Buffer(); plugbuffer->add(_portalname= (_unnamedportalkey=_pgsqlsess._unnamedportalmux->trylock(1)) ? "" : PORTALPREFIX+int2hex(_pgsqlsess._pportalcount++) )->add_int8(0) ->add(_preparedname)->add_int8(0)->add_int16(sizeof(paramValues)); foreach(dtoid;;int textbin) plugbuffer->add_int16(oidformat(textbin)); plugbuffer->add_int16(sizeof(paramValues)); string cenc=_pgsqlsess._runtimeparameter[CLIENT_ENCODING]; foreach(paramValues;int i;mixed value) { if(undefinedp(value)) 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; } value=(string)value; if(String.width(value)>8) if(dtoid[i]==BYTEAOID) 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:plugbuffer->add_int32(1); 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_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; } } _plugbuffer=plugbuffer; if(_tprepared) if(_tprepared.datarowdesc) _dodatarows(); else if(dontcacheprefix->match(_query)) // Don't cache FETCH/COPY m_delete(_pgsqlsess->_prepareds,_query),_tprepared=0; } final void _processrowdesc(array(mapping(string:mixed)) datarowdesc) { _setrowdesc(datarowdesc); mapping(string:mixed) tp=_tprepared; // FIXME Is caching this worthwhile? if(!tp || !tp.datarowdesc) Thread.Thread(_dodatarows,this); if(tp) tp.datarowdesc=datarowdesc; } final void _dodatarows() { object plugbuffer=_plugbuffer; _plugbuffer=0; plugbuffer->add_int16(sizeof(_datarowdesc)); foreach(_datarowdesc;;mapping col) plugbuffer->add_int16(oidformat(col.type)); PD("Bind portal %O statement %O\n",_portalname,_preparedname); _fetchlimit=_pgsqlsess->_fetchlimit; _openportal(); object bindbuffer=c->start(1); _unnamedstatementkey=0; bindbuffer->add_int8('B')->add_hstring(plugbuffer,4,4); if(!_tprepared) closestatement(bindbuffer,_preparedname); _sendexecute(_pgsqlsess->_fetchlimit && !(cachealways[_query] || sizeof(_query)>=MINPREPARELENGTH && execfetchlimit->match(_query)) && FETCHLIMITLONGRUN,bindbuffer); } final void _openportal() {
cff3a32014-09-12Stephen R. van den Berg  _pgsqlsess->_portalsinflight++; Thread.MutexKey lock=closemux->lock(); _state=bound; lock=0; _statuscmdcomplete=UNDEFINED; }
fb8eb42014-10-31Stephen R. van den Berg  final void _purgeportal() { _unnamedportalkey=0; Thread.MutexKey lock=closemux->lock(); _fetchlimit=0; // disables further Executes switch(_state) { case copyinprogress: case bound: --_pgsqlsess->_portalsinflight; } _state=closed; lock=0; } final sctype _closeportal(PGplugbuffer plugbuffer) {
4ef8a32014-10-29Stephen R. van den Berg  sctype retval=keep;
cff3a32014-09-12Stephen R. van den Berg  PD("%O Try Closeportal %d\n",_portalname,_state); Thread.MutexKey lock=closemux->lock(); _fetchlimit=0; // disables further Executes switch(_state) {
fb8eb42014-10-31Stephen R. van den Berg  case portalinit: _state=closed; break;
cff3a32014-09-12Stephen R. van den Berg  case copyinprogress:
fb8eb42014-10-31Stephen R. van den Berg  PD("CopyDone\n"); plugbuffer->add("c\0\0\0\4");
cff3a32014-09-12Stephen R. van den Berg  case bound: _state=closed; lock=0; PD("Close portal %O\n",_portalname); if(sizeof(_portalname)) {
fb8eb42014-10-31Stephen R. van den Berg  plugbuffer->add_int8('C')->add_hstring(({'P',_portalname,0}),4,4); retval=flushsend;
cff3a32014-09-12Stephen R. van den Berg  } else _unnamedportalkey=0;
fb8eb42014-10-31Stephen R. van den Berg  if(!--_pgsqlsess->_portalsinflight) {
4ef8a32014-10-29Stephen R. van den Berg  _pgsqlsess->_readyforquerycount++;
cff3a32014-09-12Stephen R. van den Berg  _pgsqlsess->_pportalcount=0;
4ef8a32014-10-29Stephen R. van den Berg  retval=syncsend;
cff3a32014-09-12Stephen R. van den Berg  } } lock=0; return retval; }
fb8eb42014-10-31Stephen R. van den Berg  final void _processdataready() {
cff3a32014-09-12Stephen R. van den Berg  _rowsreceived++; if(_rowsreceived==1) PD("<%O _fetchlimit %d=min(%d||1,%d), _inflight %d\n",_portalname, _fetchlimit,(_portalbuffersize>>1)*_rowsreceived/_bytesreceived,
fb8eb42014-10-31Stephen R. van den Berg  _pgsqlsess._fetchlimit,_inflight);
cff3a32014-09-12Stephen R. van den Berg  if(_fetchlimit) { _fetchlimit=
fb8eb42014-10-31Stephen R. van den Berg  min((_portalbuffersize>>1)*_rowsreceived/_bytesreceived||1, _pgsqlsess._fetchlimit);
cff3a32014-09-12Stephen R. van den Berg  Thread.MutexKey lock=closemux->lock(); if(_fetchlimit && _inflight<=_fetchlimit-1) _sendexecute(_fetchlimit); else if(!_fetchlimit) PD("<%O _fetchlimit %d, _inflight %d, skip execute\n", _portalname,_fetchlimit,_inflight); lock=0;
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  }
fb8eb42014-10-31Stephen R. van den Berg  final void _releasesession() {
cff3a32014-09-12Stephen R. van den Berg  _inflight=0;
fb8eb42014-10-31Stephen R. van den Berg  _datarows->write(1); // Signal EOF
cff3a32014-09-12Stephen R. van den Berg  object plugbuffer=c->start(1); plugbuffer->sendcmd(_closeportal(plugbuffer));
11b13b2014-08-16Martin Nilsson  _pgsqlsess=UNDEFINED;
ecbab12008-07-27Stephen R. van den Berg  }
cff3a32014-09-12Stephen R. van den Berg  protected void destroy() { catch { // inside destructors, exceptions don't work _releasesession();
11b13b2014-08-16Martin Nilsson  }; }
ecbab12008-07-27Stephen R. van den Berg 
cff3a32014-09-12Stephen R. van den Berg  final void _sendexecute(int fetchlimit,void|PGplugbuffer plugbuffer) { int flushmode; PD("Execute portal %O fetchlimit %d\n",_portalname,fetchlimit); if(!plugbuffer) plugbuffer=c->start(1); plugbuffer->add_int8('E')->add_hstring(_portalname,4,8+1) ->add_int8(0)->add_int32(fetchlimit);
4ef8a32014-10-29Stephen R. van den Berg  if(!fetchlimit) flushmode=_closeportal(plugbuffer)==syncsend?syncsend:flushsend; else
cff3a32014-09-12Stephen R. van den Berg  _inflight+=fetchlimit, flushmode=flushsend; plugbuffer->sendcmd(flushmode,this);
11b13b2014-08-16Martin Nilsson  }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson  //! @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. //!
cff3a32014-09-12Stephen R. van den Berg  //! @seealso //! @[eof()], @[send_row()] array(mixed) fetch_row() { int|array datarow; if(arrayp(datarow=_datarows->try_read())) return datarow;
fb8eb42014-10-31Stephen R. van den Berg  if(!eoffound) { if(!datarow && (PD("%O Block for datarow\n",_portalname), arrayp(datarow=_datarows->read()))) return datarow; eoffound=1; _datarows->write(1); // Signal EOF for other threads }
cff3a32014-09-12Stephen R. van den Berg  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()] array(array(mixed)) fetch_row_array() { if(eoffound) return 0; array(array|int) datarow=_datarows->try_read_array(); if(!datarow) datarow=_datarows->read_array(); if(arrayp(datarow[-1])) return datarow; trydelayederror(); eoffound=1; return (datarow=datarow[..<1]); }
11b13b2014-08-16Martin Nilsson  //! @param copydatasend //! 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
cff3a32014-09-12Stephen R. van den Berg  //! explicitly or implicitly destroying the result object, or by passing no //! argument to this method.
11b13b2014-08-16Martin Nilsson  //! //! @seealso
cff3a32014-09-12Stephen R. van den Berg  //! @[fetch_row()], @[eof()] void send_row(void|string|array(string) copydata) { trydelayederror(); if(copydata) { PD("CopyData\n"); c->start()->add_int8('d')->add_hstring(copydata,4,4)->sendcmd(sendout); } else _releasesession(); } protected void run_result_cb( function(pgsql_result, array(mixed), mixed ...:void) callback, array(mixed) args) { int|array datarow; while(arrayp(datarow=_datarows->read_array())) callback(this, datarow, @args); trydelayederror(); eoffound=1; callback(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()] void set_result_callback( function(pgsql_result, array(mixed), mixed ...:void) callback, mixed ... args) { if(callback) Thread.Thread(run_result_cb,callback,args); } protected void run_result_array_cb( function(pgsql_result, array(array(mixed)), mixed ...:void) callback, array(mixed) args) { array(array|int) datarow; while((datarow=_datarows->read_array()) && arrayp(datarow[-1])) callback(this, datarow, @args); trydelayederror(); eoffound=1; if(sizeof(datarow)>1) callback(this, datarow=datarow[..<1], @args); callback(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()] void set_result_array_callback( function(pgsql_result, array(array(mixed)), mixed ...:void) callback, mixed ... args) { if(callback) Thread.Thread(run_result_array_cb,callback,args);
11b13b2014-08-16Martin Nilsson  }
ecbab12008-07-27Stephen R. van den Berg 
11b13b2014-08-16Martin Nilsson }