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Array Append

Definition​

The arrayAppend method allows you to add the ARRAY_APPEND function to the query. The ARRAY_APPEND function is used to append elements at the end of the array.

Available methods​

  • arrayAppend(KColumn kColumnArray, KColumn kColumnElement): Receives two KColumn or KTableColumn which will be supplied to the ARRAY_APPEND function.
  • arrayAppend(KColumn kColumnArray, Object element): Receives a KColumn or KTableColumn and an Object value which will be supplied to the ARRAY_APPEND function.

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

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

Example: (KColumn, KColumn)​

Java code:

k
.select(
    arrayAppend(arrayAgg(APP_USER.EMAIL), APP_USER.FIRST_NAME),
    APP_USER.CREATED_AT.cast(date())
)
.from(APP_USER)
.groupBy(APP_USER.CREATED_AT.cast(date()), APP_USER.FIRST_NAME)
.multiple();

SQL generated:

SELECT 
    ARRAY_APPEND(ARRAY_AGG(au.email), au.first_name),
    CAST(au.created_at AS DATE)
FROM app_user au
GROUP BY CAST(au.created_at AS DATE), au.first_name

Parameters:

  • None

Example: (KColumn, Object)​

Java code:

k
.select(
    arrayAppend(arrayAgg(APP_USER.EMAIL), "EOF"),
    APP_USER.CREATED_AT.cast(date())
)
.from(APP_USER)
.groupBy(APP_USER.CREATED_AT.cast(date()))
.multiple();

SQL generated:

SELECT
    ARRAY_APPEND(ARRAY_AGG(au.email), ?1),
    CAST(au.created_at AS DATE)
FROM app_user au
GROUP BY CAST(au.created_at AS DATE)

Parameters:

  • ?1: "EOF"