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<chapter id="datatype">

exists <emphasis>only</emphasis> for storage of internal catalog

names and is not intended for use by the general user. Its length

is currently defined as 64 bytes (63 usable characters plus terminator)

but should be referenced using themacro

but should be referenced using theconstant

<symbol>NAMEDATALEN</symbol>. The length is set at compile time

(and is therefore adjustable for special uses); the default

maximum length may change in a future release. The type

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PostgreSQL documentation

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<para>

The operator <replaceable class="parameter">name</replaceable>

is a sequence of up to <symbol>NAMEDATALEN</>-1 (31 by default) characters

is a sequence of up to <symbol>NAMEDATALEN</>-1 (63 by default) characters

from the following list:

<literallayout>

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