derby - Using sql DATEADD function in java

Question

When I run queries using DATEADD it seems that the database does not recognize this function. also when I just run select DATEADD(Month, -3, GETDATE()) I'm getting:

Error code -1, SQL state 42X01: Syntax error: Encountered "<EOF>" at line 1, column 36.

I added the JAR file from hsqldb-2.2.9 as you can see

What am I missing here?

Answer 1

Derby does not have a DATEADD function. You need to use the JDBC function timestampadd to achieve this:

select {fn TIMESTAMPADD(SQL_TSI_MONTH, -3, CURRENT_TIMESTAMP)}
from sysibm.sysdummy1

An alternative to using sysdummy1 is the ANSI standard values clause which works both in Derby and HSQLDB:

values ({fn TIMESTAMPADD(SQL_TSI_MONTH, -3, CURRENT_TIMESTAMP)})