Class SubstringFunction

All Implemented Interfaces:
ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

public final class SubstringFunction extends FunctionN
A SUBSTRING function.
  • Constructor Details

    • SubstringFunction

      public SubstringFunction()
  • Method Details

    • getValue

      public Value getValue(SessionLocal session, Value v1, Value v2, Value v3)
      Description copied from class: FunctionN
      Returns the value of this function.
      Overrides:
      getValue in class FunctionN
      Parameters:
      session - the session
      v1 - the value of first argument, or null
      v2 - the value of second argument, or null
      v3 - the value of third argument, or null
      Returns:
      the resulting value
    • optimize

      public Expression optimize(SessionLocal session)
      Description copied from class: Expression
      Try to optimize the expression.
      Specified by:
      optimize in class Expression
      Parameters:
      session - the session
      Returns:
      the optimized expression
    • getUnenclosedSQL

      public StringBuilder getUnenclosedSQL(StringBuilder builder, int sqlFlags)
      Description copied from class: Expression
      Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.
      Overrides:
      getUnenclosedSQL in class FunctionN
      Parameters:
      builder - string builder
      sqlFlags - formatting flags
      Returns:
      the specified string builder
    • getName

      public String getName()
      Description copied from interface: NamedExpression
      Get the name.
      Returns:
      the name in uppercase