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Version: Stable-3.1

hll_empty

Description​

Generates an empty HLL column to supplement the default values when inserting or loading data.

Syntax​

HLL_EMPTY()

Return value​

Returns an empty HLL.

Examples​

Supplement the default values when inserting data.

insert into hllDemo(k1,v1) values(10,hll_empty());

Supplement the default values when loading data.

curl --location-trusted -u <username>:<password> \
    -H "columns: temp1, temp2, col1=hll_hash(temp1), col2=hll_empty()" \
    -T example7.csv -XPUT \
    http://<fe_host>:<fe_http_port>/api/test_db/table7/_stream_load