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 Zilliz Cloud. To use it, simply specify its name in the filter section within analyzer_params.
- Python
- Java
- NodeJS
- Go
- cURL
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 Zilliz Cloud, refer to Tokenizer Reference.
After defining analyzer_params, you can apply them to a VARCHAR field when defining a collection schema. This allows Zilliz Cloud 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
- Python
- Java
- NodeJS
- Go
- cURL
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']