[postgis-tickets] [PostGIS] #4341: Use PgSQL12 "support function" API for indexed functions

[PostGIS]

#4341: Use PgSQL12 "support function" API for indexed functions
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 Reporter:  pramsey      |      Owner:  pramsey
     Type:  enhancement  |     Status:  assigned
 Priority:  high         |  Milestone:  PostGIS 3.0.0
Component:  postgis      |    Version:  trunk
 Keywords:               |
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 The PgSQL "support function" API allows functions to be re-written during
 the planning phase to include appropriate index operators.

 https://github.com/postgres/postgres/blob/93473c6ac805994a74e74ed13828c6c9433c8faf/src/include/nodes/supportnodes.h

 Using this API will allow many of the SQL wrapper functions to be retired
 and for spatial functions to be more appropriately costed.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4341>
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