What is AB_LOCAL expression where do you use it in ab-
initio?
- 5 Answers
- 28873 Views
- Cognizant, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / prasad setti
If you use an SQL SELECT statement to specify the source
for Input Table, and if the statement involves a complex
query or a join of two or more tables in an unload, Input
Table may be unable to determine the best way to run the
query in parallel. In such cases, the GDE may return an
error message suggesting you use ABLOCAL(tablename) in the
SELECT statement to tell Input Table which table to use as
the basis for the parallel unload.
To do this, you would put an ABLOCAL(tablename) in the
appropriate place in the WHERE clause in the SELECT
statement, and specify the name of the "driving table"
(often the largest table, but see below) as a single
argument.
When you run the graph, Input Table will replace the
expression "ABLOCAL(tablename)" with the appropriate
parallel query condition for that table.
For example, suppose you want to join two tables-
customer_info and acct_type-and customer_info is the
driving table. You would code the SELECT statement as
follows:
select * from acct_type, customer_info
where ABLOCAL(customer_info) and
customer_info.acctid = acct_type.id
Note that when using an alias for a table, you must tell
ABLOCAL(tablename) the alias name as well.
select * from acct_type, customer_info custinfo
where ABLOCAL(customer_info custinfo) and
custinfo.acctid = acct_type.id
| Is This Answer Correct ? | 12 Yes | 0 No |
Answer / alok
we use AB_LOCAL(expression) to increase the SQL query
performance by supplying the name of large table in
expression. This way we make it as a driving table.
| Is This Answer Correct ? | 11 Yes | 0 No |
Answer / mahendra garewal
AB_LOCAL is used for both parallel unload and for
determining the driving table in the complex queries.
| Is This Answer Correct ? | 11 Yes | 0 No |
Answer / ramanjaneyulu.i
sql queries does not recognise by Abinitio then we will use
AB_LOCAL.
| Is This Answer Correct ? | 4 Yes | 1 No |
Which Ab initio version has Hadoop connector ? and what is the latest GDE version available ?
from a graph how to select only second record always in scan?
What is flow buffering ? How it reduces the chances of having deadlock ? How to use in abinitio graph?
What is the function that transfers a string into a decimal?
Describe how you would ensure that database object definitions (tables, indices, constraints, triggers, users, logins, connection options, and server options etc)are consistent and repeatable between multiple database instances (i.e.: A test and production copy of a database)?
46.How you can create cross joined output using join component ? 47.What is the default layout of watcher files ? How to use in abinitio graph? 48.Why you get 'too many open files' error ? How to use in abinitio graph? 49.What is the significance of vnode folder under AB_WORK_DIR ? How to use in abinitio graph? 50, What is the significance AB_AIR_BRANCH? How to use in abinitio graph? 51. How can you select only unique records from a set of records ? How to use in abinitio graph? 52. How next_in_sequence work in parallel layout ? How to use in abinitio graph? 53. Why you want to set a modest number in limit ? How to use in abinitio graph? 54. How you can encrypt a password and use it in dbc file? How to use in abinitio graph? 55. Which function you should be using if you do not want to process non printable char from a feed file ? How to use in abinitio graph? 56. How you can run a component for certain conditions ? How to use in abinitio graph? 56. What is catalog and when you should use it ? How to use in abinitio graph? 57. How you can use reformat as a router ? How to use in abinitio graph? 58. How many process gets created for a n-way parallel component ? How to use in abinitio graph? 59. Why delimited DMLs take more time to process than fixed length DMLs? How to use in abinitio graph? 60. How can you select only first and last record from a file without using next_in_sequence? How to use in abinitio graph? 61.Why you should always keep largest input as driving input for Join ? How to use in abinitio graph? 62. What a catalog file contains ? How to use in abinitio graph? 63. What Is private project and public project ? How to use in abinitio graph? 64. Why you should not use checkpoint after replicate ? How
0 Answers Accenture, Mind Tree,
What is the function you would use to transfer a string into a decimal?
How can you import XML repositories exported from different tools like ODI
How many components in your most complicated graph?
Tell us about the architecture of abinitio.
How many parallelisms are in Abinitio?
what is decoding & what is NVL?
Teradata 
