What Are Function Purity Levels?

1.	What Are Function Purity Levels?
Answer» Function purity levels DEFINE what type of DATA structures can be read or modified by a function. There are four function purity levels, which are given as follows: WNDS —Writes no database state. The function does not MODIFY any database table using any DML statement. RNDS—Reads no database state. The function does not read any database TABLES using the SELECT statement. WNPS —Writes no package state. The function does not modify any PACKAGED variables. RNPS— Reads no package state. The function does not read any packaged variables. Function purity levels define what type of data structures can be read or modified by a function. There are four function purity levels, which are given as follows:

Answer»

Function purity levels DEFINE what type of DATA structures can be read or modified by a function. There are four function purity levels, which are given as follows:

WNDS —Writes no database state. The function does not MODIFY any database table using any DML statement.
RNDS—Reads no database state. The function does not read any database TABLES using the SELECT statement.
WNPS —Writes no package state. The function does not modify any PACKAGED variables.
RNPS— Reads no package state. The function does not read any packaged variables.

Function purity levels define what type of data structures can be read or modified by a function. There are four function purity levels, which are given as follows:

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What Are Function Purity Levels?

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