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Verify range bounds to bms_add_range when necessary 

Now that the bms_add_range boundary protections are gone, some
alternative ones are needed in a few places.

Author: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
Discussion: https://postgr.es/m/3437ccf8-a144-55ff-1e2f-fc16b437823b@lab.ntt.co.jp
This commit is contained in:
Alvaro Herrera 2018-07-30 17:03:19 -04:00
parent 1b68010518
commit d25d45e4d9
3 changed files with 21 additions and 0 deletions
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5
src/backend/executor/nodeAppend.c
View File

@ -171,6 +171,7 @@ ExecInitAppend(Append *node, EState *estate, int eflags)
{
/* We'll need to initialize all subplans */
nplans = list_length(node->appendplans);
Assert(nplans > 0);
validsubplans = bms_add_range(NULL, 0, nplans - 1);
}
@ -179,7 +180,10 @@ ExecInitAppend(Append *node, EState *estate, int eflags)
* immediately, preventing later calls to ExecFindMatchingSubPlans.
*/
if (!prunestate->do_exec_prune)
{
Assert(nplans > 0);
appendstate->as_valid_subplans = bms_add_range(NULL, 0, nplans - 1);
}
}
else
{
@ -189,6 +193,7 @@ ExecInitAppend(Append *node, EState *estate, int eflags)
* When run-time partition pruning is not enabled we can just mark all
* subplans as valid; they must also all be initialized.
*/
Assert(nplans > 0);
appendstate->as_valid_subplans = validsubplans =
bms_add_range(NULL, 0, nplans - 1);
appendstate->as_prune_state = NULL;

5
src/backend/executor/nodeMergeAppend.c
View File

@ -131,6 +131,7 @@ ExecInitMergeAppend(MergeAppend *node, EState *estate, int eflags)
{
/* We'll need to initialize all subplans */
nplans = list_length(node->mergeplans);
Assert(nplans > 0);
validsubplans = bms_add_range(NULL, 0, nplans - 1);
}
@ -139,7 +140,10 @@ ExecInitMergeAppend(MergeAppend *node, EState *estate, int eflags)
* immediately, preventing later calls to ExecFindMatchingSubPlans.
*/
if (!prunestate->do_exec_prune)
{
Assert(nplans > 0);
mergestate->ms_valid_subplans = bms_add_range(NULL, 0, nplans - 1);
}
}
else
{
@ -149,6 +153,7 @@ ExecInitMergeAppend(MergeAppend *node, EState *estate, int eflags)
* When run-time partition pruning is not enabled we can just mark all
* subplans as valid; they must also all be initialized.
*/
Assert(nplans > 0);
mergestate->ms_valid_subplans = validsubplans =
bms_add_range(NULL, 0, nplans - 1);
mergestate->ms_prune_state = NULL;

11
src/backend/partitioning/partprune.c
View File

@ -486,7 +486,10 @@ get_matching_partitions(PartitionPruneContext *context, List *pruning_steps)
/* If there are no pruning steps then all partitions match. */
if (num_steps == 0)
{
Assert(context->nparts > 0);
return bms_add_range(NULL, 0, context->nparts - 1);
}
/*
* Allocate space for individual pruning steps to store its result. Each
@ -2048,8 +2051,12 @@ get_matching_hash_bounds(PartitionPruneContext *context,
bms_make_singleton(rowHash % greatest_modulus);
}
else
{
/* Getting here means at least one hash partition exists. */
Assert(boundinfo->ndatums > 0);
result->bound_offsets = bms_add_range(NULL, 0,
boundinfo->ndatums - 1);
}
/*
* There is neither a special hash null partition or the default hash
@ -2128,6 +2135,7 @@ get_matching_list_bounds(PartitionPruneContext *context,
*/
if (nvalues == 0)
{
Assert(boundinfo->ndatums > 0);
result->bound_offsets = bms_add_range(NULL, 0,
boundinfo->ndatums - 1);
result->scan_default = partition_bound_has_default(boundinfo);
@ -2140,6 +2148,7 @@ get_matching_list_bounds(PartitionPruneContext *context,
/*
* First match to all bounds. We'll remove any matching datums below.
*/
Assert(boundinfo->ndatums > 0);
result->bound_offsets = bms_add_range(NULL, 0,
boundinfo->ndatums - 1);
@ -2250,6 +2259,7 @@ get_matching_list_bounds(PartitionPruneContext *context,
break;
}
Assert(minoff >= 0 && maxoff >= 0);
result->bound_offsets = bms_add_range(NULL, minoff, maxoff);
return result;
}
@ -2327,6 +2337,7 @@ get_matching_range_bounds(PartitionPruneContext *context,
maxoff--;
result->scan_default = partition_bound_has_default(boundinfo);
Assert(minoff >= 0 && maxoff >= 0);
result->bound_offsets = bms_add_range(NULL, minoff, maxoff);
return result;