Horton

Re: [PATCH] Generic type subscripting

Dmitry Dolgov <9erthalion6@gmail.com>

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From: Dmitry Dolgov <9erthalion6@gmail.com>
To: Arthur Zakirov <a.zakirov@postgrespro.ru>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, David Steele <david@pgmasters.net>, peter.eisentraut@2ndquadrant.com, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2017-03-27T20:28:40Z
Lists: pgsql-hackers

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Here is a new version of this patch. What was changed:

* I rebased code against the latest version of master and adapted recent
  changes about the expression execution

* Several names (functions and related pg_type column) were changed

* A new oid function field was introduced to handle nested assignment
situation

* I updated the documentation for patch

* `MAXDIM` was replaced by `MAX_SUBSCRIPT_DEPTH`

* I returned one `SubscriptingRef` for both fetch & assign operations, since
  there is no real readability improvements at this point (they're already
  separated at the time of evaluation, and besides the evaluation code
fetch &
  assign are handled almost identically).

Commits

  1. Throw error when assigning jsonb scalar instead of a composite object

  2. Filling array gaps during jsonb subscripting

  3. Implementation of subscripting for jsonb

  4. Allow ALTER TYPE to update an existing type's typsubscript value.

  5. Allow subscripting of hstore values.

  6. Support subscripting of arbitrary types, not only arrays.

  7. jit: Reference function pointer types via llvmjit_types.c.

  8. Teach contain_leaked_vars that assignment SubscriptingRefs are leaky.

  9. jit: Correct parameter type for generated expression evaluation functions.

  10. Renaming for new subscripting mechanism

  11. Fix assertion failure for SSL connections.

  12. Teach eval_const_expressions() to handle some more cases.