My Oracle Support Banner

Compression Advisor fails with ORA-20000 (Doc ID 1380611.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.

Symptoms

Compression Advisor fails with ORA-20000, if there is no data at all in the table (ZERO rows)
As an example:

DECLARE
blkcnt_cmp pls_integer;
blkcnt_uncmp pls_integer;
row_cmp pls_integer;
row_uncmp pls_integer;
cmp_ratio pls_integer;
COMPTYPE_STR varchar2(100);

BEGIN
DBMS_COMPRESSION.GET_COMPRESSION_RATIO ('BONUS', 'BONUS', 'GBELETAB_9E4C', '',
DBMS_COMPRESSION.COMP_FOR_OLTP,
blkcnt_cmp, blkcnt_uncmp, row_cmp, row_uncmp, cmp_ratio, comptype_str);

DBMS_OUTPUT.PUT_LINE('Block count compressed = ' || blkcnt_cmp);
DBMS_OUTPUT.PUT_LINE('Block count uncompressed = ' || blkcnt_uncmp);
DBMS_OUTPUT.PUT_LINE('Row count per block compressed = ' || row_cmp);
DBMS_OUTPUT.PUT_LINE('Row count per block uncompressed = ' || row_uncmp);
DBMS_OUTPUT.PUT_LINE('Compression type = ' || comptype_str);
DBMS_OUTPUT.PUT_LINE('Compression ratio = '||blkcnt_uncmp/blkcnt_cmp||' to 1');
DBMS_OUTPUT.PUT_LINE('Compression ratio org= '||cmp_ratio);
END;

ORA-20000: Compression Advisor TEMP UNCMP table failure

 

The error occurs only if the schema has any table with ZERO rows

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Cause
Solution
References


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.