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3601639 - Performance issue when using TO_DECIMAL Function in SQL statement

Symptom

Similar SQL statement with big different performance for the execution.

  • Bad Case 
    SELECT COUNT(1) FROM ACDOCA WHERE TIMESTAMP > TO_DECIMAL(TO_VARCHAR(ADD_SECONDS(CURRENT_TIMESTAMP, -900), 'YYYYMMDDHH24MISS' ));
  • Good Case 
    SELECT COUNT(1) FROM ACDOCA WHERE TIMESTAMP> TO_DECIMAL(TO_VARCHAR(ADD_SECONDS(CURRENT_TIMESTAMP, -900), 'YYYYMMDDHH24MISS'), 15, 0)


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Environment

  • HANA database platform 1.0
  • HANA database platform 2.0

Product

SAP HANA, platform edition all versions

Keywords

data type, execution time, DECIMAL, SAP HANA, SQL statement, hash statement, SELECT COUNT. , KBA , HAN-DB-PERF , SAP HANA Database Performance , HAN-DB , SAP HANA Database , How To

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