Some functions in this table have a <literal>RETURNING</literal> clause,

which specifies the data type returned. It must be one of <type>json</type>,

<type>jsonb</type>, <type>bytea</type>, a character string type (<type>text</type>,

<type>char</type>,<type>varchar</type>,or <type>nchar</type>), or a type

<type>char</type>, or <type>varchar</type>), or a type

for which there is a cast from <type>json</type> to that type.

By default, the <type>json</type> type is returned.

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