61 lines
1.2 KiB
JavaScript
Executable File
61 lines
1.2 KiB
JavaScript
Executable File
// SPDX-License-Identifier: LGPL-2.1-or-later
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// Copyright (c) 2015-2024 MariaDB Corporation Ab
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'use strict';
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const Query = require('./query');
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const { Readable } = require('stream');
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/**
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* Protocol COM_QUERY with streaming events.
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* see : https://mariadb.com/kb/en/library/com_query/
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*/
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class Stream extends Query {
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constructor(cmdParam, connOpts, socket) {
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super(
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() => {},
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() => {},
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connOpts,
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cmdParam
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);
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this.socket = socket;
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this.inStream = new Readable({
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objectMode: true,
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read: () => {
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this.socket.resume();
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}
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});
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this.on('fields', function (meta) {
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this.inStream.emit('fields', meta);
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});
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this.on('error', function (err) {
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this.inStream.emit('error', err);
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});
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this.on('close', function (err) {
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this.inStream.emit('error', err);
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});
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this.on('end', function (err) {
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if (err) this.inStream.emit('error', err);
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this.socket.resume();
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this.inStream.push(null);
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});
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this.inStream.close = function () {
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this.handleNewRows = () => {};
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this.socket.resume();
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}.bind(this);
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}
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handleNewRows(row) {
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if (!this.inStream.push(row)) {
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this.socket.pause();
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}
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}
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}
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module.exports = Stream;
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