Docs: added missing column for gp_pgdatabase
instance and its mirror will have the same content ID.<p>For a segment the value is
from 0-<i>N-1</i>, where <i>N</i> is the number of segments in Greenplum Database.</p><p>For the master, the value is -1.</p></entry>
</row>
+ <row>
+ <entry><codeph>valid</codeph></entry>
+ <entry>boolean</entry>
+ <entry>gp_segment_configuration.mode</entry>
+ <entry>Whether or not this instance is up and the mode is either <i>s</i>(synchronized)
+ or <i>n</i> (not in sync). </entry>
+ </row>
<row>
<entry colname="col1">
<codeph>definedprimary</codeph>
