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Use JSON.STRAPPEND to append text to the string values a path selects. The value is JSON text, so the appended string must be quoted, as in '"suffix"'. The reply is the new length of each string the path matched, with an error for matches that are not strings. Appending in place avoids reading and rewriting the whole document just to extend one field.

Syntax

Arguments

Important points

  • Raw TCP examples pass JSON values as valid JSON text. Typed Upstash SDK helpers serialize native objects and values for you.
  • Paths beginning with $ use JSONPath and can match multiple values, so many JSON commands return an array of per-match results.

Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.
Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.