Nullability mark for optional type can not be processed when creating tables with YQL about ydb HOT 3 CLOSED

All columns in CREATE TABLE are already nullable by default, no explicit optional mark required (it will actually add second level of optionality).

Non-nullable types will be supported later with NOT NULL column setting:

CREATE TABLE Test (
    Key Int64 NOT NULL,
    PRIMARY KEY (Key)
);

from ydb.

Non-nullable types will be supported later with NOT NULL column setting:

Excuse me for offtopic, but how seen it will be supported in serverless YDB?

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We'll report in #4 once it is available.

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