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2 pg.hba conf file of both servers (in my cases *.*110.11 & ..48.22) i have specified the connection details of the opposite server. Like @ ..110.11 I have specified connection info of ..48.22


You should use this tool from command line, not from psql.


You can do this with ST_ClusterIntersecting: SELECT attr, unnest(ST_ClusterIntersecting(geom)) FROM lines GROUP by attr;

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