Sybase 12.4.2 manual Other factors affecting the display of data, 216

Other factors affecting the display of data

•ZEROS indicates that binary zeros convert to NULLS.

•literal indicates that all occurrences of the specified literal convert to 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 INT column, which is stored in binary format, and convert blanks in the input data to NULLS when inserted, use the ASCII conversion option to convert the input to binary and the NULL conversion 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

Other factors affecting the display of data

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 CAST a column value in a query to a scale 2 when it is stored with a scale 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 ofNUMERIC(7,3) to another table with a data type of DECIMAL(12,2), values such as 2.456 will become 2.45.

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