Field type

7/23/2019 Field type

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SYNON Day 2

Agenda

1. Field Types

2. Field conditions

3. Field Usage

4. Access Path

. Select!O"it c#ite#ia

$. %i#t&al Fields

'. (ands on ) *#eating +elds and Access Paths


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Part 1 -Reference Material


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Field Types

Field has a Na"e and a Field Type

*lassi+cation depends on the type o,-al&es

#oadly classi+ed as alphan&"e#ic/n&"e#ic 0 special +eld types


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Field Type Name Description Type Length Example

*D *ode A $ Stoc *ode

DT Date P '/ Date o, i#th

56* 5deg#aphic te7t A 2 8an9i na"eNA: Na##ati-e te7t A 3 *o""ents

N: N&"e# P . ; o, e"ployees

P*T Pe#centage P .2 P#o+t "a#gin

P:* P#ice o# ta#i< P '.2 Unit P#ice

=TY =&antity P . Stoc >&antity

:F :e,e#ence ) ) Field ased onanothe#

S6T S#ogate P '. Syste" 8ey

STS Stat&s A 1 Yes!No

T? Ti"e P $. *hange Ti"e

T@T Desc#ipti-e na"e A 2 P#od&ct na"e%A ?oneta#y -al&e P 11.2Stoc -al&e

%N? %alid syste" na"e A 1 File na"e


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TBo typesC Dataase +elds and F&nction+elds

Dataase +elds *ode *DE +eldsC) &sed ,o# ey +elds e.g.

*o"pany *ode

Data att#i&te AT:E +eldsC &sed ,o# non)ey +elds e.g. *o"pany Na"e

Field Usage


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F&nction +eldsThese a#e &sed only in DTT:N/ DSPT:N/ P:TF5 and

P:TO ,&nctions

They alloB ,o# co""on a#ith"etic ope#ations on a s&+leo, #eco#ds in a t#ansaction/ o# a g#o&p o, #eco#ds in a#epo#tGs ey le-el

SU? ) S&""ing a +eld -al&e th#o&gho&t a s&+le

*NT ) *o&nting the #eco#ds in the s&+le

?A@ ) :etning the "a7i"&" -al&e o, a +eld in thes&+le

?5N ) :etning the ?ini"&" -al&e o, a +eld in thes&+le

D:% *ontain any a"o&nt o, p#ocessing. Pa#a"ete#s "aye speci+ed. The #es&lt o, the &se#)de+ned calc&lation/ o#p#ocessing

US: ) O


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Field *onditions

Speci+es the -al&es o# set o, -al&es a +eld "ay tae

*ondition has a Na"e/ a type and an associated -al&e

The tBo sets o, condition types/ %A and ST ,o# STS+elds/ and *?P and :N6 ,o# othe# +eld types/ can e

&sed in ,o p#i"a#y BaysC1.al!e "#L$ %ondition Used to speci,y single -al&es that stat&s +eld can tae

tBo #elated -al&esC

inte#nal -al&e ) -al&e in the i"ple"ented dataasee7te#nal -al&e ) -al&e displayed!ente#ed on thesc#een


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&. List "L'T$ %ondition

Used to speci,y list o, -al&es that stat&s

+eld can tae Sc#een ,&nctions i"ple"ent p#o"pt ey

F4E

(. %ompare "%MP$ %ondition

De+ned in te#"s o, a +7ed -al&e and anope#ato#

%alid ope#ato#sC H=/ HN/ H6T/ HT/ H6/ H

). Range "RN*$ %ondition

De+nes #ange o, -al&es that +eld can tae

De+ned in te#"s o, F#o" and To -al&es


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Access Path

An access path de+nes the physical +le and!o# the logical-ieBs o, that +le

The o#de# in Bhich yo& Bant to #et#ie-e #eco#ds ,#o" a+le.

Ihich +elds Bill e p#esent J

Yo select!o"it c#ite#ia ,o# deciding Bhich #eco#ds ,#o"the +le Bill e #et#ie-ed y the access path.

'ix types of #ccess Paths

Physical P(YE

Update UPDE:et#ie-al :T%E

:ese>&ence :S=E

=&e#y =:YE

Span SPNE


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Physical (PHY) Access PathSingle ,o#"at +le containing +elds de#i-ed ,#o"#esol&tion o, all #elations on the +le.Not eyed.No -i#t&al +elds.*#eated a&to"atically ,o# e-e#y :F!*PT +le.Not #e,e#enced di#ectly y ,&nctions.No additional P(Y access paths alloBed ,o# a +le.


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Update (UPD) Access Path

Uni>&ely eyed/ single ,o#"at access path Bhichis &sed y ,&nctions ,o# &pdating dataase.

8eyed on the +elds that identi,y the +le.

No %i#t&al +elds.

*#eated a&to"atically ,o# e-e#y :F!*PT +le.

Additional UPD access paths "ay e c#eated Biththe sa"e ey &t s&set o, +elds.


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Retrieval (RTV) Access Path

Uni>&ely eyed/ single ,o#"at access path &sedy ,&nctions to #et#ie-e #eco#ds.

8eyed e7actly as the UPD access path.

AlloBs -i#t&al +elds.

*#eated a&to"atically ,o# e-e#y :F!*PT +le. Associated Bith the UPD access path.

Non)ey +elds can e d#opped.

*an select!o"it #eco#ds.

Possile to de+ne "&ltiple :T% access paths ,o# agi-en +le/ &t all sho&ld ha-e sa"e ey +elds.


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Resequence (RSQ) Access Path

Uni>&ely o# non)&ni>&ely eyed single ,o#"at

access path &sed y ,&nctions to #et#ie-e #eco#ds. ?&st e c#eated e7plicitly.

De,a&lts to the eys o, the ased on +le.

AlloBs de,a&lt eys to e changed Bhich need not

e &ni>&e. AlloBs -i#t&al +elds.

Associated Bith :T%/ Bhich points to a UPD.

?any :S= access paths possile ,o# single +le.


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Query (QRY) Access Path

8eyed single ,o#"at access path &sed y,&nctions to #et#ie-e #eco#ds.

?&st e c#eated e7plicitly. Display File/ Select :eco#d/ :et#ie-e O9ect/ P#int

O9ect/ and P#int File

AlloBs -i#t&al +elds on ey 0 non)ey +elds.

A-ailale only ,o# P#int O9ect!P#int File ,&nctions.

De,a&lts to the eys o, the ased on +le.

AlloBs de,a&lt eys to e changed.

Associated Bith :T%/ Bhich points to a UPD

?any =:Y access paths possile ,o# single +le

5"ple"ented y OPN=:YF o# Dyna"ic S=


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Span (SPN) Access Path

A SPN access path can only e speci+ed o-e# +les BithOBned y o# :e,e#s to #elationships

A SPN access path "&st e c#eated o-e# an oBning o##e,e##ed to +le

P#ess FK on dit Access Path Details panel to +#stselect the p#i"a#y ,o#"at and then the seconda#y

,o#"at 8eyed "&lti),o#"at access path

Used y dit 0 Display t#ansaction ,&nctions to#et#ie-e #eco#ds ,#o" a pai# o, #elated +les

?&st e c#eated e7plicitly

Used ,o# the t#ansaction)type ent#y ,&nctions DTT:Nand DSPT:N

These eys can e changed

AlloBs -i#t&al +elds

Associated Bith :T%/ Bhich points to a UPD


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P#esent a s&set o, the #eco#ds ,#o" the physical+le

5, "o#e than 1 set is &sed/ the GSe>G +eld can e&sed to speci,y the o#de# in Bhich the checs a#e

ca##ied o&t/ and the lines a#e logically LO:M dtogethe#C

The +eld and conditions na"es "ay e selected&sing the GJG p#o"pt.

5, "o#e than one condition is ente#ed on thissc#een/ they a#e logically LANDedM togethe# e,o#eincl&ding a #eco#d ,o# selection.

Select!O"it


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%i#t&al Fields

Ihen a +le is #e,e#enced y anothe# +le y"eans o, a :e,e#s to #elation/ ent#ies a#ea&to"atically c#eated on the #e,e#encing

+le ,o# the ey +elds o, the #e,e#enced +le. To incl&de a non)ey +eld ,#o" the

#e,e#enced +le in the #e,e#encing +le/ yo&need to speci,y it as a -i#t&al +eld. This

"aes the +eld a-ailale ,o# &se in the,&nctions that ope#ate &pon the#e,e#encing +le.


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Pa#t 2 (ands on


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%reate ne+ ,elds in the model and edit the defa!ltlength of the ,eld


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6o to dit +eld details y taing LM against the+eld.


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Add +eld conditions. Fo# (o#se gende# add the,olloBing tBo -al&es


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Yo& can type in the %hec condition ,eld/ to 0ie+ a selectionlist of existing conditions from Edit ,eld Details screen'elect #ll 0al!es from the screen.

N t th t P t , ti + ld di l A lt


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Note that a P#o"pt ,&nction +eld noB displays. As a #es&lt/Bhen the end &se# o, the co"piled application positions thecso# on the (o#se gende# +eld and eithe# ente#s orpresses F)/ a selection list of the conditions yo!de,ned +ill 2e displayed.


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%reate a RT #ccess path

Type against one o, the #elations ,o# the (o#se +le and add the ,olloBing

#et#ie-al inde7


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Tae LM against the Access Path to edit thepa#a"ete# o, Access Path

%reate 'elect34mit criteria


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%reate 'elect34mit criteria

Type D in the AlloB select!o"it +eld to select Dyna"icOS!4 selection and type S in the S&+le selecto# to de+nethe select!o"it c#ite#ia.


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Type / S/ and the desc#iption o, the select!o"it set.


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(o#se gende# in the Field col&"n to speci,y the +eld onBhich the condition is to e ased.?a#e in the condition col&"n to indicate the -al&e the (o#segende# +eld "&st contain ,o# the #eco#d to e selected.


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Speci,y a Select c#ite#ia ,o# the Stallions AccessPath


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Speci,y the ,olloBing c#ite#ia


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5ncl&de Fo# Te7t in the #elationship y taing QMagainst the #elationship5ncl&de %i#t&al +elds in the :e,e#s To #elationship as,olloBs.


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Type LQM against the +elds Bhich ha-e to e-i#t&aliRed and p#ess ente# to con+#".:epeat the sa"e ,o# the othe# :e,e#s To #elationship


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NoB tae against the +le #elationship to displaythe dit File nt#ies panel


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Note that the -i#t&al +elds yo& 9&st speci+ed a#eincl&ded as indicated y a % in the nt#y type tEcol&"n.


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Than Yo&

Field type

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