<refsynopsisdiv>

<synopsis>

JSON (

<parameter>expression</parameter>[ FORMAT JSON[ ENCODING UTF8] ]

[ { WITH | WITHOUT } UNIQUE[ KEYS] ]

[ RETURNING <replaceable class="parameter">json_data_type</replaceable>]

<function>JSON</function> (

<parameter>expression</parameter><optional> FORMAT JSON<optional> ENCODING UTF8</optional> </optional>

<optional> { WITH | WITHOUT } UNIQUE<optional> KEYS</optional> </optional>

<optional> RETURNING <replaceable class="parameter">json_data_type</replaceable></optional>

)

</synopsis>

</refsynopsisdiv>

<variablelist>

<varlistentry>

<term>

<literal><parameter>expression</parameter>[ FORMAT JSON[ ENCODING UTF8] ]</literal>

<literal><parameter>expression</parameter><optional> FORMAT JSON<optional> ENCODING UTF8</optional> </optional></literal>

</term>

<listitem>

<para>

</varlistentry>

<varlistentry>

<term>

<literal>[{ WITH | WITHOUT } UNIQUE[ KEYS] ]</literal>

<literal>{ WITH | WITHOUT } UNIQUE<optional> KEYS</optional></literal>

</term>

<listitem>

<para>