[teiid-issues] [JBoss JIRA] Created: (TEIID-1767) Hibernate Month Date Extraction

[Johnathon Lee (JIRA)]

Hibernate Month Date Extraction
-------------------------------

                 Key: TEIID-1767
                 URL: https://issues.jboss.org/browse/TEIID-1767
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
    Affects Versions: 7.1.1
            Reporter: Johnathon Lee
            Assignee: Steven Hawkins
             Fix For: 7.4.1, 7.6


When using teiid-hibernate-dialect-7.1.1.GA, the TeiidDialect does not include a function to get the month value of a date object. It includes functions to get other date attributes (year, dayofmonth etc). Without a defined function, attempting to get a month value falls back on the hibernate-core function which attempts to utilize an extract method which is not supported in 7.1.1. 

Example Query: select d from Data d where month(d.date)='09'

HQL Generated: 

select
        data0_.Id as Id25_,
        data0_.DataAmt as DataAmt25_,
        data0_.Data as Data25_,
    from
        Data data0_ 
    where
        extract(month 
    from
        data0_.date)='09'


Being able to obtain a month value from a date is a critical requirement.

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