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Editorial Team
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Asked: 2026-06-11T22:55:55+00:00

I have a table in which date column is stores as varchar. while doing

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I have a table in which date column is stores as varchar.
while doing the Object relational mapping (i am using eclipselink) i want to map this string/varchar to Date object in java.

My table is : 

T_BUSINESS
  TRAN_ID        Number, 
  BUSINESS_DATE  Varchar

and I want to select all the rows where business date is between two input dates, here problem is since BUSINESS_DATE is varchar i cannot carry out the comparison. I can’t modify the table and i don’t wanna use the Native sql.

Can anybody tell me how can I do this.

Thanks in advance!

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1 Answer

  1. Editorial Team

    You can use a TypeConverter to map this,

    See,

    http://www.eclipse.org/eclipselink/documentation/2.4/jpa/extensions/a_typeconverter.htm#CHDHCCJF

    Doing comparisons in queries may be more difficult, I think the default date format is yyyy-mm-dd so a varchar comparison may work. Otherwise you really need a real DATE field on the database. You could use a database function to convert the varchar to a DATE for comparison, such as using CAST or FUNCTION which EclipseLink support is JPQL.

    See,
    http://www.eclipse.org/eclipselink/documentation/2.4/jpa/extensions/j_cast.htm#cast

    http://www.eclipse.org/eclipselink/documentation/2.4/jpa/extensions/j_func.htm#func

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