Reduce minimum search term length from 3 to 2 characters in SettingsBuilder

[sokojh]

Current Behavior

Currently, the elasticsearch search filter in SettingsBuilder.java enforces a minimum length of 3 characters for search terms.

datahub/metadata-io/src/main/java/com/linkedin/metadata/search/elasticsearch/indexbuilder/SettingsBuilder.java

Line 228 in a6e1624

ImmutableMap.<String, Object>builder().put(TYPE, "length").put("min", "3").build());

Proposed Change

Change the minimum length from 3 to 2 characters:

 ImmutableMap.<String, Object>builder().put(TYPE, "length").put("min", "2").build()); 

Motivation

Currently, the minimum search length of 3 characters creates significant limitations for multilingual search capabilities, especially for:

1. Non-English Language Support

• Many Asian languages (Korean, Chinese, Japanese) commonly use 2-character meaningful words
• Important search terms are being filtered out due to the 3-character minimum requirement
• This affects user experience for non-English speaking users

2. Common Use Cases Affected

• Two-letter abbreviations (e.g., AI, ML, BI)
• Short company names or product codes
• ISO country codes (US, UK, KR)
• Common industry acronyms

3. User Experience Impact

• Users are forced to type additional characters to perform searches
• Relevant search results are being missed due to length restrictions
• Creates friction in multilingual environments

Expected Impact

Positive Changes

• Enhanced multilingual search support
• Better accommodation of various writing systems
• Improved search accuracy for short but meaningful terms
• More intuitive search experience for international users