Skip to main content

Lower

Definition​

The lower method allows you to add the LOWER function to the query. The LOWER function is used to convert a string from upper case to lower case.

There are 2 ways to call this method:

1. Calling from a KColumn or a KTableColumn​

The only one method available to use this functionality calling from a KColumn or a KTableColumn is:

  • lower(): It does not receive any parameters. The KColumn or KTableColumn that invokes the method will be the one supplied to the LOWER function.

Example​

Java code:

k
.select(
    APP_USER.EMAIL.lower()
)
.from(APP_USER)
.multiple();

SQL generated:

SELECT
    LOWER(au.email)
FROM app_user au

Parameters:

  • None

2. Calling from the KFunction class​

The methods available to use this functionality calling from the KFunction class are:

  • lower(KColumn kColumn): Receives a KColumn or a KTableColumn which will be supplied to the LOWER function.
  • lower(KValTextField kValTextField): Receives a KValTextField which will be supplied to the LOWER function.

To use this way, you need to import the static functions as follows:

import static com.myzlab.k.KFunction.*;

Example: (KColumn)​

Java code:

k
.select(
    lower(APP_USER.EMAIL)
)
.from(APP_USER)
.multiple();

SQL generated:

SELECT
    LOWER(au.email)
FROM app_user au

Parameters:

  • None

Example: (KValTextField)​

Java code:

k
.select(
    lower(val("A short text"))
)
.single();

SQL generated:

SELECT LOWER(?1)

Parameters:

  • ?1: "A short text"