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Quote Nullable

Definition​

The quoteNullable method allows you to add the QUOTE_NULLABLE function to the query. The QUOTE_NULLABLE function return the given string suitably quoted to be used as a string literal in an SQL statement string; or, if the argument is null, return NULL.

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:

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

Example​

Java code:

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

SQL generated:

SELECT
    QUOTE_NULLABLE(au.email)
FROM app_user au

Parameters:

  • None

2. Calling from the KFunction class​

The only one method available to use this functionality calling from the KFunction class are:

  • quoteNullable(KColumn kColumn): Receives a KColumn or a KTableColumn which will be supplied to the QUOTE_NULLABLE function.

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

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

Example​

Java code:

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

SQL generated:

SELECT
    QUOTE_NULLABLE(au.email)
FROM app_user au

Parameters:

  • None