🚀 Try Zilliz Cloud, the fully managed Milvus, for free—experience 10x faster performance! Try Now>>

Milvus
Zilliz
Home
  • User Guide
  • Home
  • Docs
  • User Guide

  • Schema & Data Fields

  • Analyzer

  • Filters

  • Lowercase

Lowercase

The lowercase filter converts terms generated by a tokenizer to lowercase, making searches case-insensitive. For example, it can convert ["High", "Performance", "Vector", "Database"] to ["high", "performance", "vector", "database"].

Configuration

The lowercase filter is built into Milvus. To use it, simply specify its name in the filter section within analyzer_params.

analyzer_params = {
    "tokenizer": "standard",
    "filter": ["lowercase"],
}
Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer", "standard");
analyzerParams.put("filter", Collections.singletonList("lowercase"));
const analyzer_params = {
    "tokenizer": "standard",
    "filter": ["lowercase"],
};
analyzerParams = map[string]any{"tokenizer": "standard", "filter": []any{"lowercase"}}
# restful
analyzerParams='{
  "tokenizer": "standard",
  "filter": [
    "lowercase"
  ]
}'

The lowercase filter operates on the terms generated by the tokenizer, so it must be used in combination with a tokenizer. For a list of tokenizers available in Milvus, refer to Tokenizer Reference.

After defining analyzer_params, you can apply them to a VARCHAR field when defining a collection schema. This allows Milvus to process the text in that field using the specified analyzer for efficient tokenization and filtering. For details, refer to Example use.

Examples

Analyzer configuration

analyzer_params = {
    "tokenizer": "standard",
    "filter": ["lowercase"],
}
Map<String, Object> analyzerParams = new HashMap<>();
analyzerParams.put("tokenizer", "standard");
analyzerParams.put("filter", Collections.singletonList("lowercase"));
// javascript
analyzerParams := map[string]any{"tokenizer": "standard", "filter": []any{"lowercase"}}
# restful

Expected output

['the', 'lowercase', 'filter', 'ensures', 'uniformity', 'in', 'text', 'processing']

Try Managed Milvus for Free

Zilliz Cloud is hassle-free, powered by Milvus and 10x faster.

Get Started
Feedback

Was this page helpful?