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Dial back -Wimplicit-fallthrough to level 3

Browse Source 
The additional pain from level 4 is excessive for the gain.

Also revert all the source annotation changes to their original
wordings, to avoid back-patching pain.

Discussion: https://postgr.es/m/31166.1589378554@sss.pgh.pa.us
This commit is contained in:
Alvaro Herrera
2020-05-13 15:31:14 -04:00
parent 81ca868630
commit 17cc133f01
34 changed files with 194 additions and 199 deletions
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14
src/backend/executor/nodeHash.c
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@ -256,7 +256,7 @@ MultiExecParallelHash(HashState *node)
* way, wait for everyone to arrive here so we can proceed.
*/
BarrierArriveAndWait(build_barrier, WAIT_EVENT_HASH_BUILD_ALLOCATING);
/* FALLTHROUGH */
/* Fall through. */
case PHJ_BUILD_HASHING_INNER:
@ -1181,13 +1181,13 @@ ExecParallelHashIncreaseNumBatches(HashJoinTable hashtable)
/* All other participants just flush their tuples to disk. */
ExecParallelHashCloseBatchAccessors(hashtable);
}
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BATCHES_ALLOCATING:
/* Wait for the above to be finished. */
BarrierArriveAndWait(&pstate->grow_batches_barrier,
WAIT_EVENT_HASH_GROW_BATCHES_ALLOCATING);
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BATCHES_REPARTITIONING:
/* Make sure that we have the current dimensions and buckets. */
@ -1200,7 +1200,7 @@ ExecParallelHashIncreaseNumBatches(HashJoinTable hashtable)
/* Wait for the above to be finished. */
BarrierArriveAndWait(&pstate->grow_batches_barrier,
WAIT_EVENT_HASH_GROW_BATCHES_REPARTITIONING);
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BATCHES_DECIDING:
@ -1255,7 +1255,7 @@ ExecParallelHashIncreaseNumBatches(HashJoinTable hashtable)
dsa_free(hashtable->area, pstate->old_batches);
pstate->old_batches = InvalidDsaPointer;
}
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BATCHES_FINISHING:
/* Wait for the above to complete. */
@ -1533,13 +1533,13 @@ ExecParallelHashIncreaseNumBuckets(HashJoinTable hashtable)
/* Clear the flag. */
pstate->growth = PHJ_GROWTH_OK;
}
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BUCKETS_ALLOCATING:
/* Wait for the above to complete. */
BarrierArriveAndWait(&pstate->grow_buckets_barrier,
WAIT_EVENT_HASH_GROW_BUCKETS_ALLOCATING);
/* FALLTHROUGH */
/* Fall through. */
case PHJ_GROW_BUCKETS_REINSERTING:
/* Reinsert all tuples into the hash table. */