How to do a bitwise operation on a specific column in the database timesten

Hello

I need to do a bitwise operation and (&) operation on a column of data (whose datatype is NUMBER).

If I do something like SELECT 1010 & COLUMN1 from TABLENAME;

It will give the error: 'type 'NUMBER' not valid for operator 'BITAND' operand in expr data '.

Anyboday can help me?

Thanks in advance

Concerning

Arnaud

NUMBER is floating point format. Bitwise operators apply only to INTEGER values. There are several ways to work around it...

1. If the column in the database only stores integral values and then change its definition to NUMBER (n) (choose n) properly.

2. change the select statement to SELECT 1010 & CAST (COLUMN1 AS TT_INTEGER) (or TT_BIGINT according to the maximum value if you tore in the column)

3. change the column to a native integer TimesTen type as TT_INTEGER, TT_BIGINT etc. It uses less space and more efficient.

The columns should * only * be defined as NUMBER (with no precision or scale) if they really need to have this flexibility. Always use an explicit precision (and which adapted as appropriate) because this saves memory and allows to avoid this kind of issue. Better yet, use whole native types TimesTen, wherever possible. They use less memory and provide superior performance to those of all variants of NUMBER.

Chris

Tags: Database

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