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ABAP Keyword Documentation → ABAP − Reference → Processing External Data → ABAP Database Accesses → Open SQL → Open SQL - Read Accesses → SELECT → SELECT - WHERE → WHERE - sql_cond →sql_cond - NULL
Syntax
... col IS [NOT] NULL ...
Effect
This expression is true if the value of col is (not) the null value. If this expression is used, the SELECT statement bypasses SAP buffering.
Note
All other relational expressions of a WHERE condition are unknown if a participating column contains the null value.