abap-sql-amdp

ABAP SQL & AMDP

Guide for writing modern ABAP SQL statements and ABAP Managed Database Procedures (AMDP) in ABAP Cloud and Standard ABAP.

Workflow

1. Determine the user's goal:

   • Writing or optimizing ABAP SQL queries
   • Using advanced SQL features (window functions, CTEs, aggregates)
   • Creating AMDP procedures or functions
   • Implementing CDS table functions via AMDP
   • Understanding PRIVILEGED ACCESS for authorization bypass

2. Identify the context:

   • ABAP for Cloud Development vs. Standard ABAP (affects available syntax)
   • Performance optimization needs
   • Whether AMDP is justified (prefer ABAP SQL when possible)

3. Guide implementation using modern ABAP SQL syntax

Modern ABAP SQL Quick Reference

Basic SELECT with Inline Declaration

"Single record
SELECT SINGLE FROM ztravel
  FIELDS travel_id, description, total_price, currency_code
  WHERE travel_id = @lv_travel_id
  INTO @DATA(ls_travel).

"Multiple records into internal table
SELECT FROM ztravel
  FIELDS travel_id, description, total_price, currency_code
  WHERE status = 'O'
  ORDER BY total_price DESCENDING
  INTO TABLE @DATA(lt_travels)
  UP TO 100 ROWS.

Expressions in SELECT List

SELECT FROM zflight
  FIELDS carrier_id,
         connection_id,
         flight_date,
         seats_max - seats_occupied AS seats_free,
         CASE WHEN seats_occupied > seats_max * 80 / 100
              THEN 'FULL'
              ELSE 'AVAILABLE'
         END AS availability,
         CAST( price AS DECFLOAT34 ) AS price_dec,
         CONCAT( carrier_id, connection_id ) AS flight_key
  INTO TABLE @DATA(lt_flights).

Aggregate Functions and GROUP BY

SELECT FROM zflight
  FIELDS carrier_id,
         COUNT(*) AS flight_count,
         SUM( seats_occupied ) AS total_passengers,
         AVG( price ) AS avg_price,
         MIN( flight_date ) AS first_flight,
         MAX( flight_date ) AS last_flight
  GROUP BY carrier_id
  HAVING COUNT(*) > 10
  INTO TABLE @DATA(lt_stats).