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Array Length

Definition​

The arrayLength method allows you to add the ARRAY_LENGTH function to the query. The ARRAY_LENGTH function is used to return the length of the requested array dimension.

Available methods​

  • arrayLength(KColumn kColumnArray, int n): Receives a KColumn or KTableColumn and a int value which will be supplied to the ARRAY_LENGTH 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(
    arrayLength(arrayAgg(APP_USER.EMAIL), 1),
    APP_USER.CREATED_AT.cast(date())
)
.from(APP_USER)
.groupBy(APP_USER.CREATED_AT.cast(date()))
.multiple();

SQL generated:

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

Parameters:

  • None