SAP Knowledge Base Article - Preview

2538857 - Text space usage - SAP ASE

Symptom

How to minimize the size of a text or image column?


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Environment

 SAP Adaptive Server Enterprise (ASE) all versions

Product

SAP Adaptive Server Enterprise 12.5 ; SAP Adaptive Server Enterprise 15.7 ; SAP Adaptive Server Enterprise 15.7 Cluster Edition ; SAP Adaptive Server Enterprise 16.0 ; Sybase Adaptive Server Enterprise 12.5 ; Sybase Adaptive Server Enterprise 15.0 ; Sybase Adaptive Server Enterprise 15.5 ; Sybase Adaptive Server Enterprise Cluster Edition 15.0 ; Sybase Adaptive Server Enterprise Cluster Edition 15.5 ; Sybase Adaptive Server Enterprise Cluster Edition 15.7

Keywords

reducing the size, frees up space, LOB, deallocate, first text page, compression

use test
go
drop table t1
go
create table t1 (c1 int, c2 text null)
go
insert t1 values (1, "a")
go
update t1 set c2 = null
go
insert t1 values (2,null)
go
select char_length(c2) from t1
go
 -----------
           0
        NULL (2 rows affected)  
, KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , How To

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