diff --git a/README.md b/README.md index 3ccf3a1..a733636 100644 --- a/README.md +++ b/README.md @@ -1,66 +1,56 @@ -Spark Schema Generator from PostgreSQL Table Schema -This repository contains a Python script that generates a Spark StructType schema from a PostgreSQL table schema. + -Requirements -To use the script, you will need: +
-Python 3.x -pyspark module -psycopg2 module -Access to a PostgreSQL database with the schema you want to generate a Spark schema for -Usage -Clone the repository to your local machine: +This Python program generates a PySpark StructType schema from a PostgreSQL table schema. The program connects to a PostgreSQL database, reads the schema of the specified table, and maps the PostgreSQL data types to the corresponding PySpark data types.
-pip install pyspark psycopg2 -Open the generate_spark_schema.py file in your preferred text editor. +git clone https://github.com/username/repo.git
cd repo
config.ini
file to specify the PostgreSQL database connection parameters and the name of the table to generate the schema frompython generate_schema.py
The program can be configured by editing the config.ini
file. The file contains the following parameters:
host
: the hostname or IP address of the PostgreSQL serverport
: the port number of the PostgreSQL serverdatabase
: the name of the PostgreSQL databaseuser
: the username to connect to the PostgreSQL databasepassword
: the password to connect to the PostgreSQL databasetable_name
: the name of the table to generate the schema fromThe program generates output similar to the following:
-Notes -The script assumes that any PostgreSQL column with a NOT NULL constraint is required in the Spark schema, and any column without a NOT NULL constraint is nullable in the Spark schema. -The script assumes that any PostgreSQL array column contains string elements. -The script assumes that any PostgreSQL numeric column has a specified precision and scale. If your database uses the default precision and scale for numeric columns, you may need to modify the script to handle this case. -The script assumes that the PostgreSQL schema name you provide has access to the tables you want to generate a Spark schema for. If you need to generate a schema for tables in a different schema, you will need to update the script accordingly. +StructType(List(StructField(id,IntegerType,true),StructField(name,StringType,true),StructField(age,IntegerType,true)))
-License
-This project is licensed under the MIT License. See the LICENSE file for details.
+ Contributions are welcome! Please submit a pull request if you'd like to contribute.
+This program is licensed under the MIT license. See the LICENSE.md file for details.
+ + +