Create equal2nullsafequals.py

[HackingRepo]

DBMS Support for MySQL NULL-safe Equality Operator <=>

DBMS	Supports <=> Operator?	Notes
MySQL	Yes	Native NULL-safe equality operator
MariaDB	Yes	Compatible with MySQL syntax
PostgreSQL	No	Does not support <=>; use IS NOT DISTINCT FROM for NULL-safe equality
SQLite	No	No equivalent operator; use IS NULL or IS NOT NULL for NULL checks
Microsoft SQL Server	No	No <=>; use ISNULL() or CASE expressions for NULL-safe comparison
Oracle	No	No <=>; use NVL or CASE expressions for NULL-safe comparison

Use Cases

Sometime weak waf/Filters filter (=) Using (<=>) instead bypass WAF/Filters filter equal sign

[tanaydin]

can simplify like

    if payload:
        return re.sub(r'(?<![><!])=(?!=)', '<=>', payload)