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[TD-6078]<fix>: fix binary/nchar null error in node.js [ci skip] (#7366)

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Linhe Huo 2021-08-14 12:04:12 +08:00 committed by GitHub
parent 9976d7a093
commit 9161244c22
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 57 additions and 2 deletions
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24
src/connector/nodejs/nodetaos/cinterface.js
View File

@ -109,6 +109,24 @@ function convertDouble(data, num_of_rows, nbytes = 0, offset = 0, precision = 0)
return res;
}
function convertBinary(data, num_of_rows, nbytes = 0, offset = 0, precision = 0) {
data = ref.reinterpret(data.deref(), nbytes * num_of_rows, offset);
let res = [];
let currOffset = 0;
while (currOffset < data.length) {
let len = data.readIntLE(currOffset, 2);
let dataEntry = data.slice(currOffset + 2, currOffset + len + 2); //one entry in a row under a column;
if (dataEntry[0] == 255) {
res.push(null)
} else {
res.push(dataEntry.toString("utf-8"));
}
currOffset += nbytes;
}
return res;
}
function convertNchar(data, num_of_rows, nbytes = 0, offset = 0, precision = 0) {
data = ref.reinterpret(data.deref(), nbytes * num_of_rows, offset);
let res = [];
@ -117,7 +135,11 @@ function convertNchar(data, num_of_rows, nbytes = 0, offset = 0, precision = 0)
while (currOffset < data.length) {
let len = data.readIntLE(currOffset, 2);
let dataEntry = data.slice(currOffset + 2, currOffset + len + 2); //one entry in a row under a column;
if (dataEntry[0] == 255 && dataEntry[1] == 255) {
res.push(null)
} else {
res.push(dataEntry.toString("utf-8"));
}
currOffset += nbytes;
}
return res;
@ -132,7 +154,7 @@ let convertFunctions = {
[FieldTypes.C_BIGINT]: convertBigint,
[FieldTypes.C_FLOAT]: convertFloat,
[FieldTypes.C_DOUBLE]: convertDouble,
[FieldTypes.C_BINARY]: convertNchar,
[FieldTypes.C_BINARY]: convertBinary,
[FieldTypes.C_TIMESTAMP]: convertTimestamp,
[FieldTypes.C_NCHAR]: convertNchar
}

33
src/connector/nodejs/test/testnchar.js Normal file
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@ -0,0 +1,33 @@
const taos = require('../tdengine');
var conn = taos.connect({ host: "localhost" });
var c1 = conn.cursor();
function checkData(data, row, col, expect) {
let checkdata = data[row][col];
if (checkdata == expect) {
// console.log('check pass')
}
else {
console.log('check failed, expect ' + expect + ', but is ' + checkdata)
}
}
c1.execute('drop database if exists testnodejsnchar')
c1.execute('create database testnodejsnchar')
c1.execute('use testnodejsnchar');
c1.execute('create table tb (ts timestamp, value float, text binary(200))')
c1.execute("insert into tb values('2021-06-10 00:00:00', 24.7, '中文10000000000000000000000');") -
c1.execute('insert into tb values(1623254400150, 24.7, NULL);')
c1.execute('import into tb values(1623254400300, 24.7, "中文3中文10000000000000000000000中文10000000000000000000000中文10000000000000000000000中文10000000000000000000000");')
sql = 'select * from tb;'
console.log('*******************************************')
c1.execute(sql);
data = c1.fetchall();
console.log(data)
//check data about insert data
checkData(data, 0, 2, '中文10000000000000000000000')
checkData(data, 1, 2, null)
checkData(data, 2, 2, '中文3中文10000000000000000000000中文10000000000000000000000中文10000000000000000000000中文10000000000000000000000')