What is regex (lookup)? When you should use it?
- 3 Answers
- 14955 Views
- HCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rajat singh
In a regex lookup operation, each record in the lookup file must contain a regular expression in the format described in “Regular expressions in DML functions”. The regex key specifier of a regex lookup file identifies the record field to interpret as a regular expression.
A lookup function such as lookup (file_label , expression) tests the value of its second argument against the regular expression field in each record of the lookup file, until the function finds a match.
| Is This Answer Correct ? | 3 Yes | 0 No |
In INTERVAL LOOKUP we will be defining certain range of
values like 0 - 10 , 10 - 20. Similarly in regrex lookup we
will be defining values like 0|1|2|3
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / ramakrishna
lookup is also similar to join.. by using the following
syntax we will fetch the info from lookup
lookp("looupfilename",conidition).field want to fecth from
lookup
| Is This Answer Correct ? | 1 Yes | 8 No |
what is the difference between usersandbox,privatesandbox,publicsandbox,commonproject sandbox?
what is meant by fancing in abinitio ?
What is the difference between Generate Records Component and Create Data Component?
how to calculate EME version using unix ?
What is the default layout of a component ? Is it mandatory to set the layout of a component ?
What is the Reformat Layout?(i/p ->Reformat->o/p)
)what is wrapper script?where it is going to execute and why we go for wrapper?
How do you truncate a table?
What are the reasons for which business can trust the approach of data processing?
What is AB_LOCAL expression where do you use it in ab- initio?
what does layout means in terms of Ab Initio?
How will u remove header record? How will u remove tailer record?
Teradata 
