how to avoid pg to parse a result object

I’m using api-service as a proxy between PostgreSQL and client so JSON.parse result from PostgreSQL and JSON.stringify the result to client is unnecessary and only eat service time. Could I switch off parsing response from PostgreSQL into JSON?

[mattzeunert]

It’s about 5000 rows with about 1kb of JSON each. I didn’t run the test with pg, I just ran explain analyze on the queries with and without ::text, and somehow the text conversion did slow it down a lot. (I wonder if it’s just because Postgres doesn’t normally count the serialization of the row data as part of the execution time?)

I eventually found a way to prevent parsing using the types property:

const types = require("pg").types;
res = await con.query({
  text: `SELECT values FROM table`,
  types: {
    getTypeParser(oid, ...rest) {
      if (oid === types.builtins.JSON || oid === types.builtins.JSONB) {
        return (v) => v;
      }
      return types.getTypeParser(oid, ...rest);
    },
  },
});

[budarin]

thanks !