homework-jianmu/docs/examples/node/nativeexample/param_bind_example.js

55 lines
1.3 KiB
JavaScript

const taos = require("@tdengine/client");
const conn = taos.connect({
host: "localhost",
});
const cursor = conn.cursor();
function prepareSTable() {
cursor.execute("CREATE DATABASE power");
cursor.execute("USE power");
cursor.execute(
"CREATE STABLE meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (location BINARY(64), groupId INT)"
);
}
function insertData() {
// init
cursor.stmtInit();
// prepare
cursor.stmtPrepare(
"INSERT INTO ? USING meters TAGS(?, ?) VALUES(?, ?, ?, ?)"
);
// bind table name and tags
let tagBind = new taos.TaosMultiBindArr(2);
tagBind.multiBindBinary(["California.SanFrancisco"]);
tagBind.multiBindInt([2]);
cursor.stmtSetTbnameTags("d1001", tagBind.getMultiBindArr());
// bind values
let rows = [[1648432611249, 1648432611749], [10.3, 12.6], [219, 218], [0.31, 0.33]];
let valueBind = new taos.TaosMultiBindArr(4);
valueBind.multiBindTimestamp(rows[0]);
valueBind.multiBindFloat(rows[1]);
valueBind.multiBindInt(rows[2]);
valueBind.multiBindFloat(rows[3]);
cursor.stmtBindParamBatch(valueBind.getMultiBindArr());
cursor.stmtAddBatch();
// execute
cursor.stmtExecute();
cursor.stmtClose();
}
try {
prepareSTable();
insertData();
} finally {
cursor.close();
conn.close();
}