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Update readme file with new command line syntax to specify rows per insert #40

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Update readme file with new command line syntax to specify rows per insert #40

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fe658ac
Update readme file with new command line syntax to specify rows per i…
ahmad-511 Dec 23, 2023
246b2ec
Code refactoring: Decoupling / Pass process.args as parameters
ahmad-511 Dec 23, 2023
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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ Provide table data as a CSV ([comma-separated values](https://en.wikipedia.org/w
1. Confirm you have a directory named `csv`
2. Confirm you have a directory named `sql`
3. Save your input CSV file in the `csv` directory
4. In a terminal window, first run `npm install` to install dependencies and then run `npm start YourFileName`
4. In a terminal window, first run `npm install` to install dependencies and then run `npm start YourFileName` or `npm start YourFileName RowsPerInsert` where `RowsPerInsert` is an optional integer number specifies how many rows to include in one `INSERT` statement
5. Watch the terminal window for any error messages
6. Your SQL insert statement will be saved in `sql/YourFileName.sql`

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22 changes: 12 additions & 10 deletions src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,15 +3,14 @@ import {createIfNot} from "./utils/fileUtils.js"
import * as path from "node:path"
async function writeSQL(statement: string, saveFileAs = "", isAppend: boolean = false) {
try {
const destinationFile = process.argv[2] || saveFileAs;
if (!destinationFile) {
if (!saveFileAs) {
throw new Error("Missing saveFileAs parameter");
}
createIfNot(path.resolve(`./sql/${destinationFile}.sql`))
if(isAppend){
await fs.appendFile(`sql/${process.argv[2]}.sql`, statement);
createIfNot(path.resolve(`./sql/${saveFileAs}.sql`))
if(isAppend){
await fs.appendFile(`sql/${saveFileAs}.sql`, statement);
}else{
await fs.writeFile(`sql/${process.argv[2]}.sql`, statement);
await fs.writeFile(`sql/${saveFileAs}.sql`, statement);
}
} catch (err) {
console.log(err);
Expand All @@ -20,10 +19,10 @@ async function writeSQL(statement: string, saveFileAs = "", isAppend: boolean =

async function readCSV(csvFileName = "", batchSize: number = 0) {
try {
const fileAndTableName = process.argv[2] || csvFileName;
const fileAndTableName = csvFileName || 'output';

batchSize = parseInt(process.argv[3]) || batchSize || 500;
let isAppend: boolean = false;
batchSize = batchSize || 500;
let isAppend: boolean = false;

if (!fileAndTableName) {
throw new Error("Missing csvFileName parameter");
Expand Down Expand Up @@ -91,5 +90,8 @@ async function readCSV(csvFileName = "", batchSize: number = 0) {
console.log(err);
}
}
readCSV();

const outputFileName = process.argv[2];
const batchSize = parseInt(process.argv[3]);
readCSV(outputFileName, batchSize);
console.log("Finished!");