pgsql: Allow _h_indexbuild() to be interrupted.

Allow _h_indexbuild() to be interrupted.

When we are building a hash index that is large enough to need
pre-sorting (larger than either maintenance_work_mem or NBuffers),
the initial sorting phase is interruptible, but the insertion
phase wasn't. Add the missing CHECK_FOR_INTERRUPTS().

Per bug #18616 from Alexander Lakhin. Back-patch to all
supported branches.

Pavel Borisov

Discussion: /messages/by-id/18616-acbb9e5caf41e964@postgresql.org

Branch
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REL_16_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/d23109f4bd65ef217dbd72846afa949927640463

Modified Files
--------------
src/backend/access/hash/hashsort.c | 3 +++
1 file changed, 3 insertions(+)