Translation to sql server - date functions

[eric-fey-hus]

When translating to tsql, the date functions are not converted correctly. For example, it translates "date_part('year', start_date)" to "EXTRACT(year FROM start_date)". But what is needed (correct) "YEAR(start_date)" or "DATEPART(year, start_date)".

Note: EXTRACT is not valid in tsql, SQL Server: https://learn.microsoft.com/en-us/sql/t-sql/functions/date-and-time-data-types-and-functions-transact-sql?view=sql-server-ver16#GetDateandTimeParts

Discussed in #1884

^{Originally posted by eric-fey-hus July 4, 2023}
Hi,

I want to use the transpile function to translate postgres to sql server. I am using write="tsql", but still get errors. For example, it translates "date_part('year', start_date)" to "EXTRACT(year FROM start_date)". But what I need is "YEAR(start_date)".

How can I define my own "translation" of this in a custom dialect?

Kind regards, Eric