StringSubstring4Method (DataNucleus RDBMS plugin 5.2.8 API)

java.lang.Object
- org.datanucleus.store.rdbms.sql.method.StringSubstring4Method

All Implemented Interfaces:

SQLMethod
```
public class StringSubstring4Method
extends Object
implements SQLMethod
```
Method for evaluating {strExpr}.substring(numExpr1 [,numExpr2]). Returns a StrignExpression that equates to
- ```
SUBSTRING(strExpr, numExpr1+1)
```
  when no end position provided.
- ```
SUBSTRING(strExpr, numExpr1+1, numExpr2-numExpr1)
```
  when end position provided.
Typically required by SQLServer.

Constructor Summary

Constructors
Constructor Description

StringSubstring4Method()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SQLExpression`	`getExpression(SQLStatement stmt, SQLExpression expr, List<SQLExpression> args)`	Return the expression for this SQL function.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - StringSubstring4Method
```
public StringSubstring4Method()
```
- Method Detail
  - 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