[HACKERS] Access inside pg_node_tree from query?

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От Ryan Murphy
Тема [HACKERS] Access inside pg_node_tree from query?
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Msg-id CAHeEsBddCbdvY=Rrm44mFLFLCpP5LcNOtKA1-y=VkM8zT2pELA@mail.gmail.com
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Ответы Re: [HACKERS] Access inside pg_node_tree from query?  (Michael Paquier <michael.paquier@gmail.com>)
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Hi Postgressers,

Quick question, just curious - is there a way to access the members of a `pg_node_tree` value within a Postgres query?  By pg_node_tree I mean for example, the `ev_qual` field in the `pg_rewrite` table.  By "access the members" I mean in the same way that you can access the members of a json or jsonp value (using -> or ->>).  Is there anything analogous for pg_node_tree?

Thanks!
Ryan

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