[DERBY-69] RFE: HEX function

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Component/s: SQL
• Assignee: Unassigned
• Reporter: Christian d'Heureuse
• Created: 16/Nov/04 22:57
• Updated: 12/Mar/13 11:44
• Resolved: 12/Mar/13 11:44

Description

It would be good to have a built-in HEX function, or another method to create character values with arbitrary ASCII values (e.g. TAB, CR/LF, etc.).

If "CHAR FOR BIT DATA" values could be converted to CHAR or VARCHAR, the x'...' syntax could be used to create binary character constants. But I found no way to convert "CHAR FOR BIT DATA" to CHAR.

I didn't find an explicit description of the X'...' syntax in the reference manual. The only 2 occurences are in the SQL examples of the LENGTH function ("VALUES LENGTH(X'FF')") and of the "CHAR FOR BIT DATA" data type ("INSERT INTO t VALUES (X'DE');"). Is the x'...' syntax an unwanted remains from an old Cloudscape version, or will it still be supported (and properly documeted) in future Derby versions?

Issue Links

• duplicates: DERBY-1360 Implement SQL Unicode character string literal