nodejs: How to parse each column of a csv and based on each column value perform a desired task like:
I am having a master table in GCS, which is having information related to Bucket,source, big query dataset, big query table..based on a file landing in gcs it should be loaded into the bq with the mapped table.
like:
bucket File Dataset Target
A A.csv A A.csv
A B.csv A B.csv
B A.csv A C.csv
How I can achieve this using nodejs function.
here, is the code which I wrote:
parsing the csv:
let fs = require('fs');
let fastcsv = require('fast-csv');
let readableStreamInput = fs.createReadStream('gs://…./Master_Table.csv');
let csvData = ;
fastcsv
.fromStream(readableStreamInput, {headers: true})
.on('data', (data) => {
let rowData = {};
Object.keys(data).forEach(current_key => {
rowData[current_key] = data[current_key]
});
csvData.push(rowData);
}).on('end', () => {
console.log('csvData', csvData);
console.log('total rows of table', csvData.length);
})
node.js google-cloud-functions
asked Nov 12 '18 at 18:00
flametechflametech
1
add a comment |
I am having a master table in GCS, which is having information related to Bucket,source, big query dataset, big query table..based on a file landing in gcs it should be loaded into the bq with the mapped table.
like:
bucket File Dataset Target
A A.csv A A.csv
A B.csv A B.csv
B A.csv A C.csv
How I can achieve this using nodejs function.
here, is the code which I wrote:
parsing the csv:
let fs = require('fs');
let fastcsv = require('fast-csv');
let readableStreamInput = fs.createReadStream('gs://…./Master_Table.csv');
let csvData = ;
fastcsv
.fromStream(readableStreamInput, {headers: true})
.on('data', (data) => {
let rowData = {};
Object.keys(data).forEach(current_key => {
rowData[current_key] = data[current_key]
});
csvData.push(rowData);
}).on('end', () => {
console.log('csvData', csvData);
console.log('total rows of table', csvData.length);
})
node.js google-cloud-functions
asked Nov 12 '18 at 18:00
flametechflametech
1
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08
add a comment |
I am having a master table in GCS, which is having information related to Bucket,source, big query dataset, big query table..based on a file landing in gcs it should be loaded into the bq with the mapped table.
like:
bucket File Dataset Target
A A.csv A A.csv
A B.csv A B.csv
B A.csv A C.csv
How I can achieve this using nodejs function.
here, is the code which I wrote:
parsing the csv:
let fs = require('fs');
let fastcsv = require('fast-csv');
let readableStreamInput = fs.createReadStream('gs://…./Master_Table.csv');
let csvData = ;
fastcsv
.fromStream(readableStreamInput, {headers: true})
.on('data', (data) => {
let rowData = {};
Object.keys(data).forEach(current_key => {
rowData[current_key] = data[current_key]
});
csvData.push(rowData);
}).on('end', () => {
console.log('csvData', csvData);
console.log('total rows of table', csvData.length);
})
node.js google-cloud-functions
asked Nov 12 '18 at 18:00
flametechflametech
1
I am having a master table in GCS, which is having information related to Bucket,source, big query dataset, big query table..based on a file landing in gcs it should be loaded into the bq with the mapped table.
like:
bucket File Dataset Target
A A.csv A A.csv
A B.csv A B.csv
B A.csv A C.csv
How I can achieve this using nodejs function.
here, is the code which I wrote:
parsing the csv:
let fs = require('fs');
let fastcsv = require('fast-csv');
let readableStreamInput = fs.createReadStream('gs://…./Master_Table.csv');
let csvData = ;
fastcsv
.fromStream(readableStreamInput, {headers: true})
.on('data', (data) => {
let rowData = {};
Object.keys(data).forEach(current_key => {
rowData[current_key] = data[current_key]
});
csvData.push(rowData);
}).on('end', () => {
console.log('csvData', csvData);
console.log('total rows of table', csvData.length);
})
node.js google-cloud-functions
node.js google-cloud-functions
asked Nov 12 '18 at 18:00
flametechflametech
1
asked Nov 12 '18 at 18:00
flametechflametech
1
asked Nov 12 '18 at 18:00
flametechflametech
1
asked Nov 12 '18 at 18:00
flametechflametech
1
asked Nov 12 '18 at 18:00
flametechflametech
1
1
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08
add a comment |
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53267678%2fnodejs-how-to-parse-each-column-of-a-csv-and-based-on-each-column-value-perform%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53267678%2fnodejs-how-to-parse-each-column-of-a-csv-and-based-on-each-column-value-perform%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
You need to add more info to what do you want to do. the question in unclear and unlikely to be answered.
– tbking
Nov 12 '18 at 18:09
let me re-phrase it once, ultimate goal is to move the data dynamically to BQ as soon as the files comes in GCS.so, for this I am having a master table in GCS which is having four fields : Bucket Name, File Name, Dataset Name, Table Name..based on the mapping from the respective attributes I want the data to be inserted into BQ. I want to use nodejs for parsing the .csv file , and based on each column value it will ingest the data into BQ
– flametech
Nov 12 '18 at 19:08