@squashql/squashql-codegen
v1.0.17
Published
SquashQL CLI to generate type definitions representing tables from your database
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SquashQL Codegen
This tool is inspired by Kysely Codegen
squashql-codegen generates type definitions that represent tables and fields from your database in ts file named tables.ts
.
It fetches from a database the list of available tables and fields and creates a typescript file with this information. The
types can be used with the TypeScript library to build SQL-like queries compatible with SquashQL.
NPM
https://www.npmjs.com/package/@squashql/squashql-codegen
Support
Only the following databases are supported for the time being:
Example:
import {TableField} from "@squashql/squashql-js"
export interface SquashQLTable {
_fields: TableField[]
_name: string
}
class Product implements SquashQLTable {
readonly _name = "product"
readonly productId: TableField = new TableField("product.product_id")
readonly price: TableField = new TableField("product.price")
readonly brand: TableField = new TableField("product.brand")
readonly categoryId: TableField = new TableField("product.category_id")
readonly _fields: TableField[] = [this.productId, this.price, this.brand, this.categoryId]
}
class Category implements SquashQLTable {
readonly _name = "category"
readonly categoryId: TableField = new TableField("category.category_id")
readonly status: TableField = new TableField("category.status")
readonly _fields: TableField[] = [this.categoryId, this.status]
}
const product = new Product()
const category = new Category()
export {
product, category
}
And then you can use it for your calculations that need to use the Field
interface or the constant . See the documentation.
import {product, category} from "./table"
const price: TableField = product.price
const status: TableField = category.status
const priceName: string = price.name // name of the field is accessible
// ...
Installation & Execution
To install the CLI globally
npm install -g @squashql/squashql-codegen
To execute the CLI without installing anything
npx @squashql/squashql-codegen
Configuration
Create an .env to define a couple of environment variables needed to connect to the database and correctly execute the script. It is also possible to pass the values to the CLI
In each case, a client needs to be created to connect to the DB by setting the env. variable SQUASHQL_CLIENT
.
To choose where the file should be written, the following env. variable can be set SQUASHQL_PATH
.
# .env file
SQUASHQL_CLIENT="bigquery" # mandatory
SQUASHQL_PATH="/Users/john/tmp" # optional, table.ts will be written in /Users/john/tmp directory
BigQuery
The CLI uses Application Default Credentials to authenticate.
# .env file
SQUASHQL_CLIENT="bigquery" # mandatory
SQUASHQL_BIGQUERY_DATASET_ID="nameofthedataset" # mandatory
GOOGLE_APPLICATION_CREDENTIALS="/path/to/key.json" # mandatory if this authentication method is used https://cloud.google.com/docs/authentication/application-default-credentials#GAC
Snowflake
# .env file
SQUASHQL_CLIENT="snowflake"
# Snowflake
SQUASHQL_SNOWFLAKE_ACCOUNT="abc123.north-europe.azure" # mandatory
SQUASHQL_SNOWFLAKE_USERNAME="john" # mandatory
SQUASHQL_SNOWFLAKE_PASSWORD="mypassword" # mandatory
SQUASHQL_SNOWFLAKE_DATABASE="DATABASE_NAME" # mandatory
SQUASHQL_SNOWFLAKE_SCHEMA="SCHEMA_NAME" # mandatory