Teradata Parallel Data Pump

Chapter 3: Teradata TPump Commands
FIELD
FIELD
Purpose
The FIELD command specifies a field of the input record; it can also contain a NULLIF
expression. All fields specified by FIELD commands are sent to Teradata Database. Only
fields relevant to the tasks using this layout need be specified.
Syntax
.FIELD fieldname startpos datadesc
A
fieldexpr
NULLIF nullexpr
A
DROP
LEADING
TRAILING
BLANKS
NULLS
AND
TRAILING
LEADING
NULLS
BLANKS
B ;
KEY
B
3021A019
where
Syntax Element
fieldname
Description
Name of an input record field to which:
1 a DML statement refers,
2 a nullexpr of a FIELD command or condition expression of a LAYOUT
command refers, or
3 a condition expression of the IMPORT command APPLY clause refers.
A fieldname must obey the same rules for its construction as Teradata SQL
column names.
fieldname can be referenced in other FIELD commands via NULLIF and field
concatenation expressions, and in APPLY WHERE conditions in IMPORT
commands.
startpos
Starting position of a field of the data records in an external data source
It may be specified as an unsigned integer which is a character position starting
with 1, or as an asterisk which means the next available character position
beyond the preceding field. Nothing prevents redefinition of positions of input
records by specifying the same positions in multiple FIELD commands. See the
example below.
Note that where input records may be continued by use of the CONTINUEIF
condition, a startpos specified as an unsigned integer refers to a character
position in the final concatenated result from which the continuation indicator
fields have been removed. Refer to the description of the condition parameter of
the LAYOUT command.
Teradata Parallel Data Pump Reference 133