tdengine-client/examples/queryExample.js

A Node.js connector for TDengine.

const taos = require('../tdengine');
const conn = taos.connect({ host: "127.0.0.1"});
const cursor = conn.cursor();


cursor.execute("create database if not exists test keep 3650",{'quiet':false});
cursor.execute("use test",{'quiet':false});
cursor.execute("create table if not exists t( ts timestamp,v1 tinyint,v2 smallint,v4 int,v8 bigint,u1 tinyint unsigned,u2 smallint unsigned,u4 int unsigned,u8 bigint unsigned,f4 float,f8 double,bin binary(20),nchr nchar(20),b bool,nilcol int)tags( bo bool,tt tinyint,si smallint,ii int,bi bigint,tu tinyint unsigned,su smallint unsigned,iu int unsigned,bu bigint unsigned,ff float,dd double,bb binary(20),nc nchar(20));",{'quiet':false});
cursor.execute("insert into t1 using t tags (true,-1,-2,-3,-4,1,2,3,4,5,5.55,'varchar_tag','nchar_tag') values(1656677700000,0,1,2,3,0,1,2,3,0,0,'varchar_col_0','nchar_col_0',true,NULL)",{'quiet':false});
cursor.execute("insert into t1 values(1656677800100,1,2,3,4,1,2,3,4,1,2,'varchar_col_1','nchar_col_1',false,NULL)",{'quiet':false});

cursor. execute("select * from  test.t;",{'quiet':false})
cursor.fetchall();
console.log(cursor.fields); // Latest query's Field metadata is stored in cursor.fields
console.log(cursor.data); // Latest query's result data is stored in cursor.data, also returned by fetchall.


let p = cursor.query("select * from test.t;")
p.execute().then((result) => result.pretty());

let p2 = cursor.query("select * from test.t;",true);
p2.then((result) =>result.pretty())