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TDengine

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TDengine
未验证 提交 f0b77fa3 编写于 作者: H Huo Linhe 提交者： GitHub
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[TD-4258]<fix>: speedup nodejs fetchall() with taos_fetch_block (#6165)

上级 4697cdfd
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src/connector/nodejs/nodetaos/cursor.js
浏览文件 @ f0b77fa3
const ref = require('ref-napi'); const ref = require('ref-napi');
require('./globalfunc.js') require('./globalfunc.js')
const CTaosInterface = require('./cinterface') const CTaosInterface = require('./cinterface')
const errors = require ('./error') const errors = require('./error')
const TaosQuery = require('./taosquery') const TaosQuery = require('./taosquery')
const { PerformanceObserver, performance } = require('perf_hooks'); const { PerformanceObserver, performance } = require('perf_hooks');
module.exports = TDengineCursor; module.exports = TDengineCursor;
...@@ -22,7 +22,7 @@ module.exports = TDengineCursor; ...@@ -22,7 +22,7 @@ module.exports = TDengineCursor;
* @property {fields} - Array of the field objects in order from left to right of the latest data retrieved * @property {fields} - Array of the field objects in order from left to right of the latest data retrieved
* @since 1.0.0 * @since 1.0.0
*/ */
function TDengineCursor(connection=null) { function TDengineCursor(connection = null) {
//All parameters are store for sync queries only. //All parameters are store for sync queries only.
this._rowcount = -1; this._rowcount = -1;
this._connection = null; this._connection = null;
...@@ -176,27 +176,22 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) { ...@@ -176,27 +176,22 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) {
throw new errors.OperationalError("Invalid use of fetchall, either result or fields from query are null. First execute a query first"); throw new errors.OperationalError("Invalid use of fetchall, either result or fields from query are null. First execute a query first");
} }
let data = []; let num_of_rows = this._chandle.affectedRows(this._result);
let data = new Array(num_of_rows);
this._rowcount = 0; this._rowcount = 0;
//let nodetime = 0;
let time = 0; let time = 0;
const obs = new PerformanceObserver((items) => { const obs = new PerformanceObserver((items) => {
time += items.getEntries()[0].duration; time += items.getEntries()[0].duration;
performance.clearMarks(); performance.clearMarks();
}); });
/*
const obs2 = new PerformanceObserver((items) => {
nodetime += items.getEntries()[0].duration;
performance.clearMarks();
});
obs2.observe({ entryTypes: ['measure'] });
performance.mark('nodea');
*/
obs.observe({ entryTypes: ['measure'] }); obs.observe({ entryTypes: ['measure'] });
performance.mark('A'); performance.mark('A');
while(true) { while (true) {
let blockAndRows = this._chandle.fetchBlock(this._result, this._fields); let blockAndRows = this._chandle.fetchBlock(this._result, this._fields);
// console.log(blockAndRows);
// break;
let block = blockAndRows.blocks; let block = blockAndRows.blocks;
let num_of_rows = blockAndRows.num_of_rows; let num_of_rows = blockAndRows.num_of_rows;
if (num_of_rows == 0) { if (num_of_rows == 0) {
...@@ -205,16 +200,18 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) { ...@@ -205,16 +200,18 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) {
this._rowcount += num_of_rows; this._rowcount += num_of_rows;
let numoffields = this._fields.length; let numoffields = this._fields.length;
for (let i = 0; i < num_of_rows; i++) { for (let i = 0; i < num_of_rows; i++) {
data.push([]); // data.push([]);
let rowBlock = new Array(numoffields); let rowBlock = new Array(numoffields);
for (let j = 0; j < numoffields; j++) { for (let j = 0; j < numoffields; j++) {
rowBlock[j] = block[j][i]; rowBlock[j] = block[j][i];
} }
data[data.length-1] = (rowBlock); data[this._rowcount - num_of_rows + i] = (rowBlock);
// data.push(rowBlock);
} }
} }
performance.mark('B'); performance.mark('B');
performance.measure('query', 'A', 'B'); performance.measure('query', 'A', 'B');
let response = this._createSetResponse(this._rowcount, time) let response = this._createSetResponse(this._rowcount, time)
...@@ -239,7 +236,7 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) { ...@@ -239,7 +236,7 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) {
* @return {number | Buffer} Number of affected rows or a Buffer that points to the results of the query * @return {number | Buffer} Number of affected rows or a Buffer that points to the results of the query
* @since 1.0.0 * @since 1.0.0
*/ */
TDengineCursor.prototype.execute_a = function execute_a (operation, options, callback, param) { TDengineCursor.prototype.execute_a = function execute_a(operation, options, callback, param) {
if (operation == undefined) { if (operation == undefined) {
throw new errors.ProgrammingError('No operation passed as argument'); throw new errors.ProgrammingError('No operation passed as argument');
return null; return null;
...@@ -265,14 +262,14 @@ TDengineCursor.prototype.execute_a = function execute_a (operation, options, cal ...@@ -265,14 +262,14 @@ TDengineCursor.prototype.execute_a = function execute_a (operation, options, cal
} }
if (resCode >= 0) { if (resCode >= 0) {
// let fieldCount = cr._chandle.numFields(res2); // let fieldCount = cr._chandle.numFields(res2);
// if (fieldCount == 0) { // if (fieldCount == 0) {
// //cr._chandle.freeResult(res2); // //cr._chandle.freeResult(res2);
// return res2; // return res2;
// } // }
// else { // else {
// return res2; // return res2;
// } // }
return res2; return res2;
} }
...@@ -360,17 +357,17 @@ TDengineCursor.prototype.fetchall_a = function fetchall_a(result, options, callb ...@@ -360,17 +357,17 @@ TDengineCursor.prototype.fetchall_a = function fetchall_a(result, options, callb
for (let k = 0; k < fields.length; k++) { for (let k = 0; k < fields.length; k++) {
rowBlock[k] = block[k][j]; rowBlock[k] = block[k][j];
} }
data[data.length-1] = rowBlock; data[data.length - 1] = rowBlock;
} }
} }
cr._chandle.freeResult(result2); // free result, avoid seg faults and mem leaks! cr._chandle.freeResult(result2); // free result, avoid seg faults and mem leaks!
callback(param2, result2, numOfRows2, {data:data,fields:fields}); callback(param2, result2, numOfRows2, { data: data, fields: fields });
} }
} }
ref.writeObject(buf, 0, param); ref.writeObject(buf, 0, param);
param = this._chandle.fetch_rows_a(result, asyncCallbackWrapper, buf); //returned param param = this._chandle.fetch_rows_a(result, asyncCallbackWrapper, buf); //returned param
return {param:param,result:result}; return { param: param, result: result };
} }
/** /**
* Stop a query given the result handle. * Stop a query given the result handle.
...@@ -428,7 +425,7 @@ TDengineCursor.prototype.subscribe = function subscribe(config) { ...@@ -428,7 +425,7 @@ TDengineCursor.prototype.subscribe = function subscribe(config) {
*/ */
TDengineCursor.prototype.consumeData = async function consumeData(subscription, callback) { TDengineCursor.prototype.consumeData = async function consumeData(subscription, callback) {
while (true) { while (true) {
let { data, fields, result} = this._chandle.consume(subscription); let { data, fields, result } = this._chandle.consume(subscription);
callback(data, fields, result); callback(data, fields, result);
} }
} }
...@@ -450,7 +447,7 @@ TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) { ...@@ -450,7 +447,7 @@ TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) {
* @return {Buffer} A buffer pointing to the stream handle * @return {Buffer} A buffer pointing to the stream handle
* @since 1.3.0 * @since 1.3.0
*/ */
TDengineCursor.prototype.openStream = function openStream(sql, callback, stime = 0, stoppingCallback, param = {}) { TDengineCursor.prototype.openStream = function openStream(sql, callback, stime = 0, stoppingCallback, param = {}) {
let buf = ref.alloc('Object'); let buf = ref.alloc('Object');
ref.writeObject(buf, 0, param); ref.writeObject(buf, 0, param);
...@@ -463,17 +460,17 @@ TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) { ...@@ -463,17 +460,17 @@ TDengineCursor.prototype.unsubscribe = function unsubscribe(subscription) {
for (let k = 0; k < fields.length; k++) { for (let k = 0; k < fields.length; k++) {
rowBlock[k] = blocks[k][j]; rowBlock[k] = blocks[k][j];
} }
data[data.length-1] = rowBlock; data[data.length - 1] = rowBlock;
} }
callback(param2, result2, blocks, fields); callback(param2, result2, blocks, fields);
} }
return this._chandle.openStream(this._connection._conn, sql, asyncCallbackWrapper, stime, stoppingCallback, buf); return this._chandle.openStream(this._connection._conn, sql, asyncCallbackWrapper, stime, stoppingCallback, buf);
} }
/** /**
* Close a stream * Close a stream
* @param {Buffer} - A buffer pointing to the handle of the stream to be closed * @param {Buffer} - A buffer pointing to the handle of the stream to be closed
* @since 1.3.0 * @since 1.3.0
*/ */
TDengineCursor.prototype.closeStream = function closeStream(stream) { TDengineCursor.prototype.closeStream = function closeStream(stream) {
this._chandle.closeStream(stream); this._chandle.closeStream(stream);
} }
src/connector/nodejs/package-lock.json 已删除 100644 → 0
浏览文件 @ 4697cdfd
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"integrity": "sha512-+5nt5AAniqsCnu2cEQQdpzCAh33kVx8n0VoFidKpB1dVVLAN/F+bgVOqOJqOnEnrhp222clB5p3vUlD+1QAnfg=="
}
}
}
src/connector/nodejs/package.json
浏览文件 @ f0b77fa3
{ {
"name": "td2.0-connector", "name": "td2.0-connector",
"version": "2.0.6", "version": "2.0.7",
"description": "A Node.js connector for TDengine.", "description": "A Node.js connector for TDengine.",
"main": "tdengine.js", "main": "tdengine.js",
"directories": { "directories": {
......
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