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Blank-Line Grouping in Lists

The edge cases behind one row of the gap table in Preserve Breaks: an empty line between two list items is a BLANK_LINE gap, and a BLANK_LINE gap is honored at every tier — including preserveBreaks: off, because a blank line is meaning rather than layout.

There is no setting for this and no separate mechanism behind it. Read Preserve Breaks for the model; this page is the corners.

Blank-line groups between select items survive​

select
    k_student,
    any_value(tenant_code) as tenant_code,

    max(a) as is_title_i_active,

    max(b) as is_title_i_annual,

    max(c) as part_status
from stage
select
    k_student,
    any_value(tenant_code) as tenant_code,

    max(a) as is_title_i_active,

    max(b) as is_title_i_annual,

    max(c) as part_status
from stage

A run of blank lines collapses to one​

select
    a,



    b
from t
select
    a,

    b
from t

A grouped list never collapses onto one line​

select a, b,

c from t
select
    a,
    b,

    c
from t

An own-line comment is not a group boundary​

select
    a,
    -- own-line comment
    b
from t
select
    a,
    -- own-line comment
    b
from t