Core Data Services (CDS) ABAP Feature Matrix

• INNER JOIN
• LEFT OUTER JOIN
• RIGHT OUTER JOIN

• UNION
• UNION ALL

• WHERE
• GROUP BY
• HAVING
• AS

• AVG
• MAX
• MIN
• SUM
• COUNT( DISTINCT )
• COUNT( * )

• In SELECT list, e.g.: 'literal' AS fieldName
• As RHS value

• +
• -
• *

• / (Float-based division)

• CEIL
• MOD

• ABS
• DIV (Integer-based division)
• DIVISION (Decimal-based division)
• FLOOR
• ROUND

• SUBSTRING
• LPAD

• CONCAT
• REPLACE

• CAST to built-in DDIC types, e.g.: abap.fltp

• COALESCE
• CURRENCY_CONVERSION
• UNIT_CONVERSION
• DECIMAL_SHIFT

• "Simple" CASE (behaves like switch statement)
• Nested CASE statements

• "Searched" CASE (behaves like if ... else if)

• Boolean Operators
  • NOT, AND, OR
• Comparison Operators
  • BETWEEN, =, <>, <, >, <=, >=, LIKE
  • IS [NOT] NULL**

**Only in WHERE conditions

Extensibility

$EXTENSION.* (support for database table extensions)

EXTEND VIEW**

** Added elements cannot be input parameters, path expressions or aggregate expressions

• Path expressions in
  • SELECT list
  • FROM clause
  • WHERE clause
  • HAVING clause
• Filter conditions in path expressions, e.g.: products._texts[ langu = 'EN' ] as english_name

"Core" Annotations

• End-user Texts
• (Implicit) Client Handling
• SAP Buffering
• Reference Fields for amounts/quantities

• Data Aging
• Compiler (compare filter conditions of path expressions to reduce number of JOINs)

• KEY elements

• Input parameters