csv2sql-lite-2 v0.0.8
csv2sql-lite
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`--'csv2sql-lite is a transform stream which is both writable and readable. You would write a .csv file/string into it, and read out MySQL INSERT statements. Useful for large .csv files so one does not have to buffer the .csv into memory.
Note: This repo can be found on npm here: csv2sql-lite
Note: See csv2sql-stream on npm for an alternative.
Caveat: The .csv parsing is very rudimentary, however it can be replaced easily by many modules on npm, look for lineToInsert() in the source.
Caveat: Only tested on *nix OS, YMMV on Windoze.
Usage
Install:
npm install csv2sql-liteUse:
var CSV2SQL = require('csv2sql-lite');
var csv2sql = CSV2SQL(opts);See below for the documentation of opts, the options object.
Example
Open up a read stream to the .csv file and a write stream to where you want
the .sql file to be output:
//csv_stream.js
var fs = require('fs');
var rstream = fs.createReadStream('./data.csv');
var wstream = fs.createWriteStream('./mysql.sql');Load the csv2sql-lite module, with options:
var CSV2SQL = require('csv2sql-lite');
var csv2sql = CSV2SQL({
tableName: 'myTableName',
dbName: 'myFancyDatabaseName',
});Wire up the streams with pipe():
rstream.pipe(csv2sql).pipe(wstream);Execute the program:
$ nodejs csv_stream.jsIf you started with data.csv like this:
username,email,password
john,john@email.com,p455w0rd
suzie,suzie@email.com,ilovejohnYou'll end up with mysql.sql looking like this:
use myFancyDatabaseName;
INSERT INTO myTableName (username,email,password) VALUES
("john","john@email.com","p455w0rd")
,("suzie","suzie@email.com","ilovejohn")
;Then you can easily load the .sql file into MySQL:
$ mysql -u root -p < mysql.sqlOptions
You can pass an options object to csv2sql containing any of the following:
| Option | Type | Default | Explanation |
|---|---|---|---|
| tableName | String | 'undefined' | The name of the table to INSERT into |
| dbName | String | false | Optionally insert USE dbName; at beginning of .sql file |
| dropTable | Boolean | false | Optionally insert DROP TABLE IF EXISTS tableName; at beginning of .sql file |
| seperator | String | ',' | Optionally specify .csv file field seperator |
| lineSeperator | String | '\n' | Optionally specify .csv file EOL seperator |
| isEachLineInsert | Boolean | false | Optionally insert insert into xxx () values for each line,This is especially useful when dealing with large amounts of data |
| eachLineHandler | Function | undefined | before write to steam,you can use this function to deal the line string,example process geometry data everyLineHandler = (line)=>{return line.replace(/(\"POINT\(.+? .+?\)\")/g, "ST_GeomFromText($1)")} |
Testing
Run npm install && npm test from the base directory to run tests.
License
MIT
4 years ago