Thank you helen.



Now I have the real content.



One question about the string:



and RDB$FIELD_NAME = ''' || fname || '''';

results: field_name = ''COLUMNNAME''' and returns a sql exception.

and RDB$FIELD_NAME = ''' || fname || '''; (your example) goes wrong. All
other text after is marked as text.



How can I realize:

Fiels_name = 'COLUMNNAME''? I have test all combinations from one ' to four.



Thanks



Best regards Olaf



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