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ILIKE clauses don't work on certain characters #6633

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monetdb-team opened this issue Nov 30, 2020 · 0 comments
Closed

ILIKE clauses don't work on certain characters #6633

monetdb-team opened this issue Nov 30, 2020 · 0 comments

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@monetdb-team
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@monetdb-team monetdb-team commented Nov 30, 2020

Date: 2018-08-01 16:57:09 +0200
From: @PedroTadim
To: SQL devs <>
Version: -- development

Last updated: 2018-08-31 13:23:25 +0200

Comment 26579

Date: 2018-08-01 16:57:09 +0200
From: @PedroTadim

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36
Build Identifier:

Ilike doesn't work properly on characters such as ä,ö,ü.

Reproducible: Always

Steps to Reproduce:

  1. CREATE TABLE debugme (acol CLOB);
  2. INSERT INTO debugme VALUES ('aa'), ('aä'), ('aÄ');
  3. SELECT acol FROM debugme WHERE acol ILIKE '%ä%';

Actual Results:

+------+
| acol |
+======+
| aä |
+------+

Expected Results:

+------+
| acol |
+======+
| aä |
| aÄ |
+------+

This works on MonetDBLite because we had to remove the PCRE dependency ;)

Comment 26580

Date: 2018-08-01 17:28:45 +0200
From: MonetDB Mercurial Repository <>

Changeset e565656ecb74 made by Pedro Ferreira pedro.ferreira@monetdbsolutions.com in the MonetDB repo, refers to this bug.

For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=e565656ecb74

Changeset description:

Added test for bug #6633.

Comment 26586

Date: 2018-08-03 12:40:14 +0200
From: MonetDB Mercurial Repository <>

Changeset fccfa2ae186e made by Sjoerd Mullender sjoerd@acm.org in the MonetDB repo, refers to this bug.

For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=fccfa2ae186e

Changeset description:

Don't use strcasecmp and strcasestr since they work byte-for-byte.
This fixes bug #6633.

Comment 26587

Date: 2018-08-03 12:55:46 +0200
From: @sjoerdmullender

It turns out you can't use strcasecmp usefully on UTF-8-encoded strings.

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