distinctJSONPaths

Introduzido em: v24.9.0 Calcula uma lista de caminhos distintos armazenados em uma coluna JSON. Sintaxe

distinctJSONPaths(json)

Argumentos

json — coluna JSON. JSON

Valor retornado Retorna a lista ordenada de paths. Array(String) Exemplos Uso básico com JSON aninhado

Query

DROP TABLE IF EXISTS test_json;
CREATE TABLE test_json(json JSON) ENGINE = Memory;
INSERT INTO test_json VALUES ('{"a" : 42, "b" : "Hello"}'), ('{"b" : [1, 2, 3], "c" : {"d" : {"e" : "2020-01-01"}}}'), ('{"a" : 43, "c" : {"d" : {"f" : [{"g" : 42}]}}}');

SELECT distinctJSONPaths(json) FROM test_json;

Response

┌─distinctJSONPaths(json)───┐
│ ['a','b','c.d.e','c.d.f'] │
└───────────────────────────┘

Com JSON paths declarados

Query

DROP TABLE IF EXISTS test_json;
CREATE TABLE test_json(json JSON) ENGINE = Memory;
INSERT INTO test_json VALUES ('{"a" : 42, "b" : "Hello"}'), ('{"b" : [1, 2, 3], "c" : {"d" : {"e" : "2020-01-01"}}}'), ('{"a" : 43, "c" : {"d" : {"f" : [{"g" : 42}]}}}')

SELECT distinctJSONPaths(json) FROM test_json;

Response

┌─distinctJSONPaths(json)─┐
│ ['a','b','c']           │
└─────────────────────────┘

​distinctJSONPaths

distinctJSONPaths