Class CoalesceFunction

java.lang.Object
org.datanucleus.store.rdbms.sql.method.CoalesceFunction
All Implemented Interfaces:
SQLMethod

public class CoalesceFunction extends Object implements SQLMethod
Expression handler to invoke the SQL COALESCE function. For use in evaluating COALESCE({expr [,expr2[,expr3]]}) where the RDBMS supports this function. All args must be of consistent expression types. Returns an SQLExpression "COALESCE({expr})".
  • Constructor Details

    • CoalesceFunction

      public CoalesceFunction()
  • Method Details

    • getExpression

      public SQLExpression getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args)
      Description copied from interface: SQLMethod
      Return the expression for this SQL function.
      Specified by:
      getExpression in interface SQLMethod
      Parameters:
      stmt - SQLStatement that this expression is for
      expr - The expression that it is invoked on
      args - Arguments passed in
      Returns:
      The SQL expression using the SQL function