Package org.evomaster.client.java.sql.internal

Class SelectTransformer

java.lang.Object

org.evomaster.client.java.sql.internal.SelectTransformer

public class SelectTransformer
extends Object

Constructor Summary

Constructors

Constructor	Description
SelectTransformer()

Method Summary

Modifier and Type	Method	Description
static String	addFieldsToSelect(String select)	The constraints in the WHERE clause might reference fields that are not retrieved in the SELECT.
static String	addLimitForHandlingRowCount(String select, boolean doRemoveOtherConstraints, int limitedRowCount)	add LIMIT for select in order to control row count
static String	removeConstraints(String select)
static String	removeOperations(String select)	For example, when we have "select count(*)" we are not interested in the count, but the actual involved fields, so we want to transform it into "select *" by removing the count() operation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SelectTransformer

public SelectTransformer()

Method Details

addFieldsToSelect

public static String addFieldsToSelect(String select)

The constraints in the WHERE clause might reference fields that are not retrieved in the SELECT. Therefore, we need to add them, otherwise it would not be possible to calculate any heuristics

Parameters:

select - the string containing the SQL SELECT command

Returns:

the modified SQL SELECT

removeOperations

public static String removeOperations(String select)

For example, when we have "select count(*)" we are not interested in the count, but the actual involved fields, so we want to transform it into "select *" by removing the count() operation.

Parameters:

select - SQL command to transform

Returns:

a transformed SQL select

removeConstraints

public static String removeConstraints(String select)

addLimitForHandlingRowCount

public static String addLimitForHandlingRowCount(String select,
 boolean doRemoveOtherConstraints,
 int limitedRowCount)

add LIMIT for select in order to control row count

Parameters:

select - specifies SELECT sql

doRemoveOtherConstraints - specified whether to remove other constraints

limitedRowCount - specifies the limit

Returns:

select statement with LIMIT clause