XMLFOREST is causing ORA-07445:[qctcpqbl()+68] (Doc ID 2830574.1)

Last updated on JULY 20, 2024

Applies to:

Symptoms

XMLFOREST in 19c causing ORA-07445:[qctcpqbl()+68]

This issue can be reproduced as below.

create table number_scale (N number);
insert into number_scale values(1);
insert into number_scale values(2);
insert into number_scale values(3);
insert into number_scale values(4);
insert into number_scale values(5);
insert into number_scale values(6);
insert into number_scale values(7);
insert into number_scale values(8);
insert into number_scale values(9);
insert into number_scale values(10);
insert into number_scale values(11);
insert into number_scale values(12);
commit;

SELECT
XMLFOREST( xmlconcat( xmlsequence( CURSOR(
SELECT 'Pos ' || n Pos,
n Num
FROM number_scale
WHERE rownum < 11
),
xmlformat('NUMBER_SCALE_ROW')))
number_scale_concat).extract('NUMBER_SCALE_CONCAT/NUMBER_SCALE_ROW')
FROM dual;

Database instance may also crash when using query with XMLSequence and nested cursor.

Changes

Cause

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