Match special pattern

[Jenny_Hsiao]

I have a question about how to parse the pattern: "hString(4 digit numbers)"

• Start with h
• follow by any string
• number in brackets

I want to parse the brackets. Can some one help me to figure out the problem?
GET /_search { "query": { "regexp":{ "pattern": "h@\([0-9]{4}\)" } } }