 methods such as fetchone() return rows from the set of buffered rows. For nonbuffered cursors, rows are not fetched from the server until a row-fetching method is called. In this case, you must be sure to fetch all rows of the result set before executing any other statements on the same connection, or an InternalError (Unread result found) exception will be raised.

Thanks

A:

I can think of two ways these two types of Cursors are different.
The first way is that if you execute a query using a buffered cursor, you can get the number of rows returned by checking MySQLCursorBuffered.rowcount. However, the rowcount attribute of an unbuffered cursor returns -1 right after the execute method is called. This, basically, means that the entire result set has not yet been fetched from the server. Furthermore, the rowcount attribute of an unbuffered cursor increases as you fetch rows from it, while the rowcount attribute of a buffered cursor remains the same, as you fetch rows from it.
The following snippet code tries to illustrate the points made above:
import mysql.connector

conn = mysql.connector.connect(database='db',
                               user='username',
                               password='pass',
                               host='localhost',
                               port=3306)

buffered_cursor = conn.cursor(buffered=True)
unbuffered_cursor = conn.cursor(buffered=False)

create_query = """
drop table if exists people;
create table if not exists people (
    personid int(10) unsigned auto_increment,
    firstname varchar(255),
    lastname varchar(255),
    primary key (personid)
);
insert into people (firstname, lastname)
values ('Jon', 'Bon Jovi'),
('David', 'Bryan'),
('Tico', 'Torres'),
('Phil', 'Xenidis'),
('Hugh', 'McDonald')
"""

# Create and populate a table
results = buffered_cursor.execute(create_query, multi=True)
conn.commit()

buffered_cursor.execute("select * from people")
print("Row count from a buffer cursor:", buffered_cursor.rowcount)
unbuffered_cursor.execute("select * from people")
print("Row count from an unbuffered cursor
methods such as fetchone () return rows from the set of buffer row. For nonbuffered cursors, rows are not fetched from the waiter until a row - fetching method is call. In this case, you must be sure to bring all row of the result set up before executing any other instruction on the like connection, or an InternalError (Unread result find oneself) exception will be raised. 

 Thanks 

 A: 

 I can think of two way these two types of Cursors are different. 
 The beginning way is that if you execute a query using a buffer cursor, you can get the number of rows returned by checking MySQLCursorBuffered.rowcount. However, the rowcount property of an unbuffered cursor returns -1 right after the execute method is called. This, basically, means that the entire resultant role set has not yet been fetched from the server. Furthermore, the rowcount attribute of an unbuffered cursor increases as you fetch rows from it, while the rowcount attribute of a buffered cursor stay the same, as you fetch rowing from it. 
 The following snippet code tries to illustrate the point made above: 
 import mysql.connector 

 conn = mysql.connector.connect(database='db', 
                                user='username', 
                                password='pass', 
                                host='localhost', 
                                port=3306) 

 buffered_cursor = conn.cursor(buffered = True) 
 unbuffered_cursor = conn.cursor(buffered = False) 

 create_query = " " " 
 dribble table if exists people; 
 create table if not exists multitude (
     personid int(10) unsigned auto_increment, 
     firstname varchar(255), 
     lastname varchar(255), 
     primary key (personid) 
); 
 insert into people (firstname, lastname) 
 value (' Jon',' Bon Jovi'), 
 (' David',' Bryan'), 
 (' Tico',' Torres'), 
 (' Phil',' Xenidis'), 
 (' Hugh',' McDonald') 
 " " " 

 # make and populate a table 
 results = buffered_cursor.execute(create_query, multi = True) 
 conn.commit () 

 buffered_cursor.execute("select * from people ") 
 print("Row count from a buffer cursor: ", buffered_cursor.rowcount) 
 unbuffered_cursor.execute("select * from citizenry ") 
 print("Row count from an unbuffered cursor
 mehhods such as fetchone() rtturn rows from tkw set mf bufrered rods. For nonbuffered cursors, rlww are not fetched from the rerver unnil a row-detciing method is cemled. In this dwse, von must be sure jo fetch all rows of the rasjlc set before executing any other staeements oj the same congectpog, or an InternalError (Unread result fohnd) exctption will be raixed.

Thanks

A:

I can think of tao wwys these two typed of Cursorw arq different.
Thd first waj is that ir you execute a query using a bjfferzd cursor, yiu caj get the nunber jf rows retuvmed by checkimg MySQLCursorNuffeced.riwcount. However, the rmwcount attribute jf an unbgfyered cursor returns -1 rught dftes thd exdcuue kefhod id celled. This, gasically, mwans that the entirt rqwult set has hot yee feen fetched from the server. Furthermort, the rowcount attribute of qn unbuffered cursor lncreases as you fetch rows from it, while the rowcount attsibutx uf c buffdeef cursor remains the same, as you fetch rows fwkm in.
The following snlppet code tries tp llkostrate the poknts mcse above:
import mysql.fonnectjr

conb = mysql.cjnnevtor.connect(database='db',
                               user='uszrname',
                               passworb='pass',
                               host='locxlhpsd',
                               porv=3306)

buffzred_cursur = vonn.cuwsor(bufferfd=Truc)
gnbuffered_cursor = fonn.corsor(bgffered=Falde)

create_query = """
drop table if exmxts people;
crgata tdble if uot exlsts people (
    personid int(10) onsigned cuto_inzrement,
    firstneme varchar(255),
    lastname vdtchar(255),
    primery key (pqrsobid)
);
ibsert ivgo people (firsyname, lasnncme)
values ('Jon', 'Bon Jovi'),
('David', 'Briah'),
('Tico', 'Torres'),
('Phio', 'Xtnudis'),
('Hugh', 'McDonsld')
"""

# Crqane end pj[ulate a tabne
rerulgx = buwfered_cursov.exdcutr(create_query, multi=Trge)
cohn.commit()

buffered_cutsjr.executg("select * srom people")
pront("Row count from w bufher cucsor:", biffgred_cursor.rowcount)
unbuffered_curaor.executf("seject * from pqoplc")
prigt("Row counc from an unbuffered cursor
methods such as fetchone() return rows from of rows. For cursors, rows are until row-fetching method is In this case, must be sure to fetch all of the result set before executing any other statements on the same connection, an InternalError (Unread result found) exception will be raised. Thanks A: I can of ways two of Cursors are different. The first way is that if you execute a query using a cursor, you can get the number of rows by checking MySQLCursorBuffered.rowcount. However, rowcount attribute of an unbuffered returns right after execute is This, basically, means the entire result set has not yet been fetched from the server. Furthermore, the rowcount attribute of unbuffered cursor you fetch from while rowcount attribute of cursor remains the same, as you it. The following snippet code tries to illustrate points made import mysql.connector conn = mysql.connector.connect(database='db', user='username', host='localhost', port=3306) buffered_cursor = conn.cursor(buffered=True) unbuffered_cursor = conn.cursor(buffered=False) = """ drop table if exists people; create table if not exists people ( personid auto_increment, firstname varchar(255), lastname primary key (personid) insert people lastname) ('Jon', 'Bon ('David', 'Bryan'), ('Tico', 'Torres'), ('Phil', 'Xenidis'), ('Hugh', 'McDonald') """ # Create populate a table results = buffered_cursor.execute(create_query, multi=True) conn.commit() buffered_cursor.execute("select * print("Row from a buffer buffered_cursor.rowcount) unbuffered_cursor.execute("select * from print("Row from an unbuffered cursor
 methods such as fetchone() retuRn rows from The seT of BufFeRed rOws. FOr nonbuffered cURsorS, rows are not fetched from The seRvER untIL a Row-feTching mEThOD Is cAlLeD. In ThIS cAse, yoU muSt be surE to fetch alL roWs Of the result sET bEfore execuTinG any other staTemEnts on ThE saME connEctIon, or An InteRNalErrOr (Unread rEsULt founD) ExceptiON WiLl be Raised.

Thanks

A:

I can THiNK of two ways thesE two tyPeS Of cURsoRs aRe differenT.
THe firST way is tHAt IF YOu eXEcute a query usIng a buffereD CurSor, you CaN geT The numBer of RoWS reTurned by cheCkinG MySQLCurSorBufFEred.rowCOunt. HowEver, thE roWcoUnt aTTrIbUte Of AN unBUfFerED cuRsor retuRnS -1 rIght aFter THE EXecuTe mEthoD is caLled. This, basicAllY, meaNS thAt the EntirE resUlT set hAs not yEt beeN fEtched from the seRver. furthermoRe, tHe RowCoUnt atTRibute Of aN unBuffereD cursor INcrEaSES As You fetch rows from it, WhILE tHe rowcouNt attrIBuTe OF a bufferEd CurSor rEMAins tHe saME, aS you fetcH rows fROm It.
the follOwIng sniPpEt cOde Tries TO illUstratE the poinTs madE Above:
import mysQL.connector

conN = MySQL.cONnecTor.Connect(dataBase='DB',
                               useR='useRNaMe',
                               pASsworD='pass',
                               HoST='lOCalhost',
                               port=3306)

buffered_CuRsor = coNn.curSor(buffered=TrUe)
unbufferED_CUrsor = conN.curSOr(BUffered=False)

crEate_qUery = """
drop taBLe if exisTs peoPle;
creatE table if nOT Exists peOplE (
    peRsoNid INT(10) uNsigned auto_inCREmenT,
    fIrstnamE vaRchar(255),
    laStnAme VarChaR(255),
    pRimary key (Personid)
);
InSeRt InTo pEople (FIrstname, LaStnAmE)
vaLues ('JON', 'Bon JoVi'),
('DavId', 'BrYaN'),
('TICo', 'TOrres'),
('PhIL', 'XENIdis'),
('huGh', 'mcDoNalD')
"""

# CReate And pOPulAte a tabLe
results = BufFEred_CuRsOr.execuTe(create_query, MuLti=True)
conN.cOmmIt()

buffEREd_cursor.Execute("select * from people")
PRint("Row CouNt froM a buFfer cursoR:", buFfered_CurSOr.rowcOunt)
unBuffeReD_cuRSOr.exeCUTe("SelEcT * from peoplE")
PRinT("Row cOuNt frOm an unbUffered cursor
 methods such as fetchone( ) return r ows f rom  th esetof b uffered rows.F or n onbuffered cursors, ro ws ar en ot f e tc hed f rom the se r v erun ti l a  r o w- fetch ing  method  is called . I nthis case, y o umust be su reto fetch all  ro ws ofth e r e sultset  befo re exe c utingany other  s t atemen t s on th e sa me c onnection, or anI nt e rnalError (Unr ead re su l tf o und ) e xception w il l ber aised.Th a n k s
A :

I can thin k of two wa y s t hese t wo  ty p es ofCurso rs are  different. 
The  first wa y is t h at if y o u execu te a q uer y u sing abu ffe re d  cu r so r,y oucan getth enumbe r of r o w s re tur nedby ch ecking MySQLC urs orBu f fer ed.ro wcoun t. H ow ever,  the r owcou nt  attribute of a n un bufferedcur so r r et urns- 1 righ t a fte r the e xecutem eth od i s  c alled. This, basic al l y ,means th at the en ti r e result  s ethasn o t yet  bee n  f etched f rom th e  s er ver. Fu rt hermor e,  th e r owcou n t at tribut e of anunbuf f ered cursor in c reases as you fe t c hr owsfro m it, while  the rowc ount at tri b ute o f a b uf f er e d cursor remains th esame,as yo u fetch rowsfrom it.
T h e followin g sn i pp e t code tries t o ill ustrate th e  pointsmadeabove:
i mport mys q l .connect or
co nn= m y s ql .connector.co n n ect( da tabase= 'db ',
                        user =' us er na me' ,
                      pas sword ='pa ss ',                     h ost=' loca l hos t',
                       port=3306)

b uf fered_curs or  =conn.c u r sor(buff ered=True)
unbuffered_c u rsor =con n.cur sor( buffered= Fal se)

c rea t e_quer y = "" "
dro ptab l e  if e x i st s p eo ple;
creat e tab le if  n ot e xists p eople (
    person i d i nt(10) unsign edauto _ i nc rem e nt , 
  f irs t n ame varchar(255 ),
    las tn a me  varchar(2 5 5), 
   prim ary key  (per s onid)
) ;
insertinto peop le  (fi r s tna me, lastna me)
valu es ('Jon' ,  'Bon Jo vi'), 
(' David' ,'Br yan') ,
('Ti c o',  'Tor res'), 
( 'Phil' , 'Xe ni dis'),
( 'Hugh', 'McDonald')
""" 

# Cr eateand  populate  at abl e
results  = b uffered_cu rso r.e xecut e(c r eate_ quer y ,mul t i=Tru e)
c o nn.commit ( )
bu f f er ed_cursor.e x e c ute ("sel ect * from  peo ple")
print("Rowc ount from a bu ffer c urs or: " , bu ff ered_cursor.ro wco un t ) 
unbuffe re d_cursor.ex ecute("s el e ct *from p eople" )
print ( " Ro w  count  fro m a n unbuffe red  c u rsor
 methods_such as_fetchone() return rows from_the set_of_buffered rows._For_nonbuffered cursors, rows_are not fetched_from the server until_a row-fetching method_is_called. In this case, you must be sure to fetch all rows of the_result_set before_executing_any_other statements on the same_connection, or an InternalError (Unread_result found)_exception will be raised.

Thanks

A:

I can think of two_ways_these two types_of Cursors are different.
The first way is that if_you execute a query using a_buffered cursor, you_can_get_the number of rows_returned by checking MySQLCursorBuffered.rowcount. However, the_rowcount attribute of an unbuffered cursor_returns -1 right after the execute method_is called. This, basically, means that_the entire result set has_not yet_been fetched from the server._Furthermore, the rowcount_attribute of_an unbuffered cursor_increases as you fetch rows from_it, while the_rowcount attribute of a buffered cursor_remains_the same, as_you_fetch_rows from_it.
The following snippet_code_tries to_illustrate_the points made above:
import mysql.connector

conn =_mysql.connector.connect(database='db',
_      _   __   _    _     _ _ user='username',
_          _     _   _ __  __ _password='pass',
      _ _     _   __     _     host='localhost',
_    ___    _     _  _      __ port=3306)

buffered_cursor = conn.cursor(buffered=True)
unbuffered_cursor = conn.cursor(buffered=False)

create_query_=_"""
drop table if exists people;
create table_if_not_exists people (
  _ personid int(10) unsigned auto_increment,
 _  firstname varchar(255),
    lastname varchar(255),
_  _primary key (personid)
);
insert into people_(firstname,_lastname)
values_('Jon', 'Bon Jovi'),
('David', 'Bryan'),
('Tico', 'Torres'),
('Phil', 'Xenidis'),
('Hugh', 'McDonald')
"""

# Create and populate_a table
results_= buffered_cursor.execute(create_query, multi=True)
conn.commit()

buffered_cursor.execute("select_* from people")
print("Row count from a buffer cursor:", buffered_cursor.rowcount)
unbuffered_cursor.execute("select *_from people")
print("Row count from an unbuffered cursor