Pxl e58fcf0f7a [Feature](column) do not change column nullable on ColumnDef (#35574) ...

do not change column nullable on ColumnDef

1. bitmap/hll/quantile_state will directly change nullable to false
1. Currently, complex types do not support nullable in the storage
layer. If it is set to null, it should be coredump.
2. It is meaningless to set complex types to null. For example, bitmap
can use bitmap_empty to represent null to avoid nullable overhead.
3. Users reported that if it is a not null bitmap. When inserting into,
it is necessary to explicitly declare bitmap_empty, which is
troublesome. However, the work of supporting the default value of
bitmap_empty for complex columns has been claimed by the community.
https://github.com/apache/doris/issues/34228
4. Consider changing it here so that if null is explicitly specified
when creating a table, an error will be reported. If it is not
explicitly specified (the default will be null), it is not null.
2. The aggregate type REPLACE_IF_NOT_NULL will directly change nullable
to true
1. If it is a not null column, using REPLACE_IF_NOT_NULL is meaningless,
which is equivalent to REPLACE.
2. Consider changing it here so that if not nullable is encountered, an
error will be reported, and a prompt to use REPLACE will be given.

2024-05-30 14:29:14 +08:00

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[Feature](column) do not change column nullable on ColumnDef (#35574)

2024-05-30 14:29:14 +08:00