PostgreSQL create and drop tables

Introduction

This document consolidates the workflows for managing tables within a PostgreSQL instance, specifically designed for sandbox environment. It encompasses two primary operations:

Creating tables (/postgres/create_table)
Dropping tables (/postgres/drop_tables)

Both operations are crucial for dynamic database schema management, allowing for the creation and removal of tables based on incoming data. The structure of the tables is predefined and aligns with other examples, with provisions for generating new SQL queries to modify the table structure as needed.

Common Components and Processes

Receiving POST Requests

Both flows initiate by receiving data through a POST request to a specified endpoint. These requests must contain necessary information for database operations, including PostgreSQL username and password. It’s important to note that the username and password provided in the example are placeholders, and users should replace them with their actual database credentials.

Example of Post request to send:

{
  "info": {
    "_postman_id": "56ff6dea-0cd1-40b3-80ef-8a7426935ede",
    "name": "IoTool",
    "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
    "_exporter_id": "4611963"
  },
  "item": [
    {
      "name": "postgres_drop_table",
      "request": {
        "method": "POST",
        "header": [],
        "body": {
          "mode": "urlencoded",
          "urlencoded": [
            {
              "key": "un",
              "value": "username",
              "type": "text"
            },
            {
              "key": "up",
              "value": "password",
              "type": "text"
            }
          ]
        },
        "url": {
          "raw": "http://dev.sandbox.engineering:1880/postgres_drop_table",
          "protocol": "http",
          "host": [
            "test.sandbox.engineering"
          ],
          "port": "1880",
          "path": [
            "android",
            "postgres_drop_table"
          ]
        }
      },
      "response": []
    }
  ]
}

Dynamic SQL Query Generation

A key component of both flows is the setting of dynamic queries within a function node for database operations. These dynamic queries are constructed based on the incoming POST request data, allowing for flexible table creation and deletion.

Unique Aspects of Each Flow

Create Table: This flow is dedicated to the creation of new tables within the PostgreSQL database, using predefined structures that can be modified through new SQL queries.
Drop Table: This flow focuses on removing existing tables from the PostgreSQL database, ensuring that tables can be dynamically managed in response to changing data or schema requirements.

Conclusion

The unified documentation for PostgreSQL table management provides a comprehensive overview of the flows involved in creating and dropping tables within a PostgreSQL database. By understanding these flows, users can effectively manage their database schema, ensuring that their database structures remain aligned with their data and application requirements.