@bazilio-san/af-stream/dist/esm/db/DbPostgres.js

Data stream from database table

// @ts-ignore
import * as pg from 'pg';
import { DbBase } from './DbBase';
const postgresDefaults = {
    // all valid client config options are also valid here
    // in addition here are the pool specific configuration parameters:
    // number of milliseconds to wait before timing out when connecting a new client
    // by default this is 0 which means no timeout
    connectionTimeoutMillis: 30000,
    // number of milliseconds a client must sit idle in the pool and not be checked out
    // before it is disconnected from the backend and discarded
    // default is 10000 (10 seconds) - set to 0 to disable auto-disconnection of idle clients
    idleTimeoutMillis: 10000,
    // maximum number of clients the pool should contain
    // by default this is set to 10.
    max: 10,
    statement_timeout: 30000,
    query_timeout: 30000, // number of milliseconds before a query call will timeout, default is no timeout
};
export class DbPostgres extends DbBase {
    constructor(options) {
        super(options);
        this.pool = null;
        const { dbOptions, dbConfig } = options;
        const postgresDbOptions = { ...postgresDefaults, ...(dbOptions || {}) };
        this.cfg = { ...postgresDbOptions, ...dbConfig };
    }
    async getPool() {
        if (this.pool) {
            return this.pool;
        }
        this.pool = new pg.Pool(this.cfg);
        return this.pool;
    }
    async close() {
        const self = this;
        return new Promise((resolve) => {
            var _a;
            (_a = self.pool) === null || _a === void 0 ? void 0 : _a.end().then(() => resolve(true));
        });
    }
    async query(strSQL) {
        const pool = await this.getPool();
        return pool.query(strSQL);
    }
    async _getColumnsNames() {
        const { fields } = await this.query(`${'SELECT'} * FROM ${this.schemaAndTable} LIMIT 1`);
        return fields.map((field) => field.name);
    }
    // eslint-disable-next-line class-methods-use-this
    limitIt(strSQL, limit) {
        return `${strSQL} LIMIT ${limit}`;
    }
}
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