[JENA-2116] Performance regression in xsd:decimal division.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Done
• Affects Version/s: Jena 3.17.0, Jena 4.0.0, Jena 4.1.0
• Fix Version/s: Jena 4.2.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 08/Jun/21 20:36
• Updated: 16/Sep/21 11:26
• Resolved: 22/Jun/21 20:12

Description

Report from users@ : 2021-06-04

As a result of JENA-1943, Java BigDecimal division will cause an ArithmeticException when then is no exact decimal result. In the report, division by 3 will mean no exact answer.

But the change in JENA-1943 (arbitray precision for exact answers) is also desirable. Simply having a quite large division precise (e.g. 100) isn't ideal because e.g. 1/3 returns 0.333333333333333333333333 (precision of 24) currently, not 0.3333...... length about 100.

Also, there is an unnecessary canonicalization of a value that is only used in further calculation so the lexical form isn't needed.

Issue Links

• split to: JENA-2122 Add MOD and IDIV