Class StringSubstringMethod

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

public class StringSubstringMethod extends Object implements SQLMethod
Method for evaluating {strExpr}.substring(numExpr1 [,numExpr2]). Returns a StringExpression that equates to
  • SUBSTRING(strExpr FROM numExpr1+1)
    when no end position provided.
  • SUBSTRING(strExpr FROM numExpr1+1 FOR numExpr2-numExpr1)
    when end position provided.
  • Constructor Details

    • StringSubstringMethod

      public StringSubstringMethod()
  • 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