Doc: add a bit to indices.sgml about what is an indexable clause.
commit499342e81b0fba471889439e47e0c37fe9e62bc0
authorTom Lane <tgl@sss.pgh.pa.us>
Sun, 17 Dec 2023 21:49:44 +0000 (17 16:49 -0500)
committerTom Lane <tgl@sss.pgh.pa.us>
Sun, 17 Dec 2023 21:49:44 +0000 (17 16:49 -0500)
tree15ecafe87da958c3a4fe3fb87ca025f3f121f4be
parentba66f253362a1797bec9641570a02574a65b3a93
Doc: add a bit to indices.sgml about what is an indexable clause.

We didn't explain this clearly until somewhere deep in the
"Extending SQL" chapter, but really it ought to be mentioned
in the introductory material too.

Discussion: https://postgr.es/m/4097442.1694967650@sss.pgh.pa.us
doc/src/sgml/indices.sgml