This processor executes a delete operation against one or more indices using the _delete_by_query handler. The query should be a valid Elasticsearch JSON DSL query (Lucene syntax is not supported). An example query:
{
"query": {
"match": {
"username.keyword": "john.smith"
}
}
}
To delete all of the contents of an index, this could be used:
{
"query": {
"match_all": {}
}
}