Table of Contents
Advertisement
Other factors affecting the display of data
Other factors affecting the display of data
216
•
indicates that binary zeros convert to NULLS.
ZEROS
•
indicates that all occurrences of the specified literal convert to
literal
NULLS. The specified literal must match exactly, including leading
and/or trailing blanks, with the value in the input file, for Adaptive Server
IQ to recognize it as a match. You can list up to 20 literal values.
You may need to use additional conversion options on the same column. For
example, to insert ASCII data into an
format, and convert blanks in the input data to NULLS when inserted, use the
conversion option to convert the input to binary and the
ASCII
option to convert blanks to NULLS.
Here is a Windows NT example:
LOAD TABLE lineitem(
l_orderkey NULLS(ZEROS) ASCII(4),
l_partkey ASCII(3),
l_shipdate date('MM/DD/YY'),
l_suppkey ascii(5),
FILLER(1))
FROM 'C:\\MILL1\\tt.t'
PREVIEW ON
Whenever Adaptive Server IQ requires an explicit or implicit conversion from
one data type to another during a query or insert, it always truncates the results.
The following describes such situations:
•
When you explicitly convert data from a higher scale to a lower scale,
Adaptive Server IQ truncates the values in the results. For example, if you
a column value in a query to a scale 2 when it is stored with a scale
CAST
4, values such as 2.4561 become 2.45. See Chapter 8, "SQL Functions" in
the Adaptive Server IQ Reference Manual for more information.
•
When Adaptive Server IQ implicitly converts from a higher scale to a
lower scale during an insertion, it truncates the values before inserting the
data into the table. For example, if you insert from one table with a data
type of
NUMERIC(7,3)
values such as 2.456 will become 2.45.
column, which is stored in binary
INT
to another table with a data type of
conversion
NULL
,
DECIMAL(12,2)
Advertisement
Table of Contents
