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USING INFORMATICA WITH TERADATA UTILITIES -III(Script creation)

TPUMP:

The basic steps involved in the TPUMP script creation:

(a) Setting up a Logtabe an! Logging onto Te"a!ata: Thelogtable is defined using the .logtable command. The table name is

arbitrary. However to avoid duplication, usage of target table nameis preferred. By default, the ntegration !ervice uses

T"#$target#table#name%$partition#number%. The database

where the table has to be located is also specified li&e in the belowe'. ()*+#B.")-#PUMP where ()*+#B is the database name

and ")-#PUMP is the table name/. The .*U0 1"2 command isused to run the logon file.

NOTE:The logtable in case of all the 3 loaders stores the information

about the progress during the load.

(b) #egin oa! p"o$e%%& a!! Pa"a'ete"%& na'ing t(e e""o"

tabe:n this section of the script the parameters such as!2!!)0, P45+ 145T)*, 2**)* "MT are defined based on the

re6uirements.1or e'. the P45+ 145T)* has been defined as 78

which means that TPUMP would pac& 78 rows at a time and load.

The error table names are also specified here.(c) De)ining t(e INPUT )at )ie:The ."49)UT command is used to

define the layout. The different layouts supported by TPUMP are

mentioned in )ig *. The column names and their data types are

listed using the .12" command. The ;< is used as a separatorbetween the columns or the .1""2* command for positioning the

cursor for the ne't field.

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Fig *

(d) De)ining t(e DML a$ti+itie% to o$$u":The 0!2*T, UP4T2

and 2"2T2 !="s are defined in this section. The M4*+ and

-0)*2 parameters are defined to define the type of errors to be

stored and the ones to be neglected respectively.(e) Na'ing t(e IMPORT )ie an! !e)ining it% FORMAT: The

.MP)*T 0"02 command is used to define the input file and its

format. n the below e'. >5(#2'port.t't> is the input file.

(f) A%%o$iate !ata ,it( !e%$"iption:1or the input file imported alayout such as 1"2"49)UT is specified.

(g) Teing t(e %%te' to %ta"t oa!ing !ata "o,%: 1inally the4PP"9 .M" "4B2" to instruct TPUMP to start loading data in to the

target tables. The e'ample below is for a simple 0!2*T script

hence there is a single .M" label. n case of UP!2*T scriptsseparate .M" "4B2"! can also be defined and conditional

statements can be defined in the 4PP"9 statement of .MP)*Tclause to e'ecute the labels.

(h) Fini%(ing oa!ing an! ogging o)) o) Te"a!ata:The .20")4 command tells TPUMP to finish the load and .")-)11

command causes TPUMP to log off and e'it from Teradata.

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Sa'pe Tpu'p %$"ipt .Si'pe In%e"t/

MLOAD:

!teps involved in a simple MU"T")4 script:

Setting up a Logtabe: This step is similar to that of TPUMP

using the .")-T4B"2 command followed by logging into Teradata.The order of these commands is interchangeable but it is better to

define the logtable and then logon into Teradata. The default

logtable name is M"#$target#table#name%. I!enti)ing t(e Ta"get& Wo"0 an! E""o" tabe%: The target,

wor& and error table names are defined here. Their names and the

database where they are to be located have to be specified. M")4creates them automatically. f unspecified integration service uses

(T#$target#table#name%, 2T#$target#table#name% and

U?#$target#table#name%.The .4T4B4!2 command can be used

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to specify the database for all the tables to be created or thedatabase can be defined individually for each of the tables.

De)ining t(e INPUT )at )ie: The input flat file structure is

defined. ata input files come in a variety of formats but Multi"oadis fle'ible enough to handle many of them. Multi"oad supports thefollowing five format options: B04*9, 14!T")4, T2@T, U01)*M4T

and ?4*T2@T same as a TPUMP A "e)e" to )ig */

De)ining t(e DML a$ti+itie% to o$$u": !=" for the various

M" operation are defined .The error trac&ing conditions can also

be defined here. M4*+ and -0)*2 parameters/. "i&e TPUMPmultiple labels can be defined for performing various M"

operations.

Na'ing t(e IMPORT )ie& aout an! %ta"t !ata oa!: Usingthe .MP)*T label the input file name and its format is specifiedand then the 4PP"9 label triggers the load.

Fini%(ing oa!ing an! ogging o)) o) Te"a!ata:The .20

M")4 command is used to finish the data load and finally the

.")-)11 command to e'it Teradata.

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Sa'pe MLOAD %$"ipt .%i'pe in%e"t %$"ipt/

FLOAD:

Logging onto Te"a!ata:The fastload script begins by definingthe no. of sessions that would be needed to e'ecute the load

followed by the Teradata logon. De)ining t(e Te"a!ata tabe t(at ou ,ant to oa! .ta"get

tabe/: The structure of the empty table which has to be

fastloaded is specified. The 5*24T2 T4B"2 statement can be usedto define the structure or the .2102 command can be used to

define the internal flat file structure. However the usage of 5*24T2

T4B"2 is not considered a good practice. nstead by ust defining atcolumn level using .2102 the 1astload automatically creates the

table from the script. De)ining t(e INPUT !ata )ie:The input file structure with its

layout type is specified. The layouts supported are T2@T,U01)*M4TT2 )* ?4*T2@T.

Teing t(e %%te' to %ta"t oa!ing:The .B2-0 ")40-

command is used to initiate the load. n this statement the target

table name and the two error table names are defined. The

5H25+P)0T parameter can also be defined in this section. Thisparameter is optional but is useful during restartability as it &eeps a

trac& of the no. of rows loaded successfully. The 0!2*T !=" for

loading the rows is defined below the .B2-0 ")40- label. Fini%(ing t(e oa! an! ogging o)): The last step is to logoff

from all the sessions. 4t this point the table loc&s are released and

error tables are dropped automatically. f however there is anyentry into the error table then the data has to be chec&ed and the

table has to be dropped manually.

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Si'pe Fa%toa! %$"ipt

Re)e"en$e%:

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