JSON.RESP - Amazon MemoryDB for Redis
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JSON.RESP

Return the JSON value at the given path in Redis Serialization Protocol (RESP). If the value is container, the response is RESP array or nested array.

  • JSON null is mapped to the RESP Null Bulk String.

  • JSON boolean values are mapped to the respective RESP Simple Strings.

  • Integer numbers are mapped to RESP Integers.

  • 64-bit IEEE double floating point numbers are mapped to RESP Bulk Strings.

  • JSON Strings are mapped to RESP Bulk Strings.

  • JSON Arrays are represented as RESP Arrays, where the first element is the simple string [, followed by the array's elements.

  • JSON Objects are represented as RESP Arrays, where the first element is the simple string {, followed by key-value pairs, each of which is a RESP bulk string.

Syntax

JSON.RESP <key> [path]
  • key (required) – Redis key of JSON document type

  • path (optional) – a JSON path. Defaults to the root if not provided

Return

If the path is enhanced syntax:

  • Array of arrays. Each array element represents the RESP form of the value at one path.

  • Empty array if the document key does not exist.

If the path is restricted syntax:

  • Array, representing the RESP form of the value at the path.

  • Null if the document key does not exist.

Examples

Enhanced path syntax:

127.0.0.1:6379> JSON.SET k1 . '{"firstName":"John","lastName":"Smith","age":27,"weight":135.25,"isAlive":true,"address":{"street":"21 2nd Street","city":"New York","state":"NY","zipcode":"10021-3100"},"phoneNumbers":[{"type":"home","number":"212 555-1234"},{"type":"office","number":"646 555-4567"}],"children":[],"spouse":null}' OK 127.0.0.1:6379> JSON.RESP k1 $.address 1) 1) { 2) 1) "street" 2) "21 2nd Street" 3) 1) "city" 2) "New York" 4) 1) "state" 2) "NY" 5) 1) "zipcode" 2) "10021-3100" 127.0.0.1:6379> JSON.RESP k1 $.address.* 1) "21 2nd Street" 2) "New York" 3) "NY" 4) "10021-3100" 127.0.0.1:6379> JSON.RESP k1 $.phoneNumbers 1) 1) [ 2) 1) { 2) 1) "type" 2) "home" 3) 1) "number" 2) "555 555-1234" 3) 1) { 2) 1) "type" 2) "office" 3) 1) "number" 2) "555 555-4567" 127.0.0.1:6379> JSON.RESP k1 $.phoneNumbers[*] 1) 1) { 2) 1) "type" 2) "home" 3) 1) "number" 2) "212 555-1234" 2) 1) { 2) 1) "type" 2) "office" 3) 1) "number" 2) "555 555-4567"

Restricted path syntax:

127.0.0.1:6379> JSON.SET k1 . '{"firstName":"John","lastName":"Smith","age":27,"weight":135.25,"isAlive":true,"address":{"street":"21 2nd Street","city":"New York","state":"NY","zipcode":"10021-3100"},"phoneNumbers":[{"type":"home","number":"212 555-1234"},{"type":"office","number":"646 555-4567"}],"children":[],"spouse":null}' OK 127.0.0.1:6379> JSON.RESP k1 .address 1) { 2) 1) "street" 2) "21 2nd Street" 3) 1) "city" 2) "New York" 4) 1) "state" 2) "NY" 5) 1) "zipcode" 2) "10021-3100" 127.0.0.1:6379> JSON.RESP k1 1) { 2) 1) "firstName" 2) "John" 3) 1) "lastName" 2) "Smith" 4) 1) "age" 2) (integer) 27 5) 1) "weight" 2) "135.25" 6) 1) "isAlive" 2) true 7) 1) "address" 2) 1) { 2) 1) "street" 2) "21 2nd Street" 3) 1) "city" 2) "New York" 4) 1) "state" 2) "NY" 5) 1) "zipcode" 2) "10021-3100" 8) 1) "phoneNumbers" 2) 1) [ 2) 1) { 2) 1) "type" 2) "home" 3) 1) "number" 2) "212 555-1234" 3) 1) { 2) 1) "type" 2) "office" 3) 1) "number" 2) "555 555-4567" 9) 1) "children" 2) 1) [ 10) 1) "spouse" 2) (nil)