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ENTERA DEVELOPER SUPPORT
Frequently Asked Questions NULL characters from data access server Question: If my SQL statement returns a string of length NULL it returns the string "NULL" not the character NULL ('\0' in C or C++). Is there a way to change this? Answer: With Entera 3.x the default setting is to return a string that contains "NULL" for any column that is 0 length. If you wish to change the way an Entera 3.x data access server represents a NULL string you can set the DAP_NULL_CHAR environment variable. For example - if you what the server to return the string 'no_data' type: export DAP_NULL_CHAR='no_data' from bash before you start your server. If you upgrade an Entera 2.x server to 3.x and plan to use existing Entera 2.x clients you will probably want to type: export DAP_NULL_CHAR='' because Entera 2.x servers return '\0' and 3.x return "NULL" for empty columns. By doing this you ensure that the 2.x clients recieve valid NULL columns.
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Made in Borland® Copyright© 1994-2003 Borland Software Corporation. All rights reserved. Last Modified Friday, 23-Mar-2001 17:07:03 PST |