Pseudo Code Generator

Create Temporary Table Logic in Relational Database

This pseudo code outlines the steps to create a temporary table in a relational database, fetching records from an existing table with conditions based on source system and deleted status. It encapsulates functionality and ensures clarity

Prompt

CREATE OR REPLACE TEMPORARY TABLE {ENV}_DNA_PRESENTATION.LOGISTICS.TMP_MAT_NAM AS
    SELECT
        *
    FROM
        {ENV}_DNA_CORE.EDM.MATERIAL_NAMES MAT_NAME
    WHERE
        MAT_NAME.SOURCE_SYSTEM_NAME='SAP'
        AND COALESCE(MAT_NAME.IS_DELETED,'FALSE')='FALSE'
;--~~

Answer

Pseudo Code for Creating Temporary Table

Purpose

This pseudo code represents the logic to create a temporary table in a relational database that fetches specific records from an existing table based on given conditions.

Input Specifications

Environment variable {ENV}
Source system name 'SAP'
Deleted status represented as 'FALSE'

Pseudo Code

SET ENVIRONMENT_VARIABLE = {ENV}  // Set the environment variable

// Create or replace a temporary table for logistics
FUNCTION create_temp_table()

    // Define the name of the temporary table
    DEFINE TEMPORARY_TABLE_NAME AS ENVIRONMENT_VARIABLE + "_DNA_PRESENTATION.LOGISTICS.TMP_MAT_NAM"
    
    // SQL for creating the temporary table
    EXECUTE "CREATE OR REPLACE TEMPORARY TABLE " + TEMPORARY_TABLE_NAME + " AS"
    
    // Select records from the MATERIAL_NAMES table
    EXECUTE "SELECT * FROM " + ENVIRONMENT_VARIABLE + "_DNA_CORE.EDM.MATERIAL_NAMES AS MAT_NAME"
    
    // Add conditions to filter records
    WHERE
        MAT_NAME.SOURCE_SYSTEM_NAME = 'SAP'  // Ensure source system is 'SAP'
        AND COALESCE(MAT_NAME.IS_DELETED, 'FALSE') = 'FALSE'  // Check IS_DELETED status

END FUNCTION

Explanation

Set Environment Variable: The code starts by setting an environment variable based on user input.
Create Temporary Table: A function is defined for creating the temporary table. This helps encapsulate the functionality.
Temporary Table Name: It combines the environment variable with the table name to dynamically create the table's name.
SQL Execution: The EXECUTE statements run SQL commands to create the table based on a selection from the MATERIAL_NAMES table.
Filtering Conditions: The WHERE clause filters results where:
- The SOURCE_SYSTEM_NAME is equal to 'SAP'.
- The IS_DELETED status is either not set or is explicitly 'FALSE'.

Conclusion

This pseudo code outlines the steps needed to create a temporary table in the database while ensuring that only relevant records are selected based on given conditions. This approach facilitates clarity in understanding the data manipulation process.