Python Elasticsearch: Retrieve All Data with match_all Query

In Elasticsearch, you can retrieve all data from an index using the 'match_all' query. Here's a Python code example:

from elasticsearch import Elasticsearch

es = Elasticsearch()

# Query for all data
query = {'query': {'match_all': {}}}
res = es.search(index='your_index_name', body=query)

# Print results
for hit in res['hits']['hits']:
    print(hit['_source'])

This code uses the Elasticsearch Python client to connect to an Elasticsearch server. It then uses the 'match_all' query to retrieve all data and prints the results.

Remember to replace 'your_index_name' with the actual name of the index you want to query.