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uncompressed data, and <literal>EXTENDED</literal> is for external,
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compressed data. <literal>EXTENDED</literal> is the default for most
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data types that support non-<literal>PLAIN</literal> storage.
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<literal>SET STORAGE</> doesn't itself change anything in the table,
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it just sets the strategy to be pursued during future table updates.
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See <xref linkend="storage-toast"> for more information.