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Documentation of the system catalogs, directed toward PostgreSQL developers

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<entry><type>char</type></entry>

<entry></entry>

<entry>Foreign key update action code:

<literal>a</> = no action,

<literal>r</> = restrict,

<literal>c</> = cascade,

<literal>n</> = set null,

<literal>d</> = set default

</entry>

<literal>a</> = no action,

<literal>r</> = restrict,

<literal>c</> = cascade,

<literal>n</> = set null,

<literal>d</> = set default

</entry>

</row>

<row>

<entry><structfield>confdeltype</structfield></entry>

<entry><type>char</type></entry>

<entry></entry>

<entry>Foreign key deletion action code:

<literal>a</> = no action,

<literal>r</> = restrict,

<literal>c</> = cascade,

<literal>n</> = set null,

<literal>d</> = set default

</entry>

<literal>a</> = no action,

<literal>r</> = restrict,

<literal>c</> = cascade,

<literal>n</> = set null,

<literal>d</> = set default

</entry>

</row>

<row>

<entry><structfield>confmatchtype</structfield></entry>

<entry><type>char</type></entry>

<entry></entry>

<entry>Foreign key match type:

<literal>f</> = full,

<literal>p</> = partial,

<literal>u</> = simple (unspecified)

</entry>

<literal>f</> = full,

<literal>p</> = partial,

<literal>u</> = simple (unspecified)

</entry>

</row>

<row>