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Adding comments to expressions

You can use the following comment specifiers to insert comments in expressions:

Two dashes:

-- These are comments

Two forward slashes:

// These are comments

Data integration tasks ignore all text on a line preceded by comment specifiers. For example, to concatenate two strings, enter the following expression with comments in the middle of the expression:

 -- This expression concatenates first and last names for customers: 
FIRST_NAME -- First names from the CUST table 
|| // Concat symbol 
LAST_NAME // Last names from the CUST table 
// Joe Smith Aug 18 1998

Data integration tasks ignore the comments and evaluates the expression as follows:

FIRST_NAME || LAST_NAME

You cannot continue a comment to a new line:

-- This expression concatenates first and last names for customers: 
FIRST_NAME -- First names from the CUST table 
|| // Concat symbol 
LAST_NAME // Last names from the CUST table 
Joe Smith Aug 18 1998

In this case, data integration tasks do not validate the expression because the last line is not a valid expression.

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Adding comments to expressions

Adding comments to expressions