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Fix UB and overflow

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This commit is contained in:
Alexey Milovidov 2020-11-08 16:41:25 +03:00
parent 44b363d16b
commit 8e1a2fc9e4
1 changed files with 34 additions and 25 deletions
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49
src/Storages/MergeTree/MergeTreeIndexConditionBloomFilter.cpp
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@ -1,17 +1,17 @@
#include <Storages/MergeTree/MergeTreeIndexConditionBloomFilter.h>
#include <Interpreters/misc.h>
#include <Interpreters/BloomFilterHash.h>
#include <Common/HashTable/ClearableHashMap.h>
#include <Storages/MergeTree/RPNBuilder.h>
#include <Storages/MergeTree/MergeTreeIndexGranuleBloomFilter.h>
#include <Common/FieldVisitorsAccurateComparison.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeTuple.h>
#include <Columns/ColumnConst.h>
#include <ext/bit_cast.h>
#include <Columns/ColumnTuple.h>
#include <Storages/MergeTree/RPNBuilder.h>
#include <Storages/MergeTree/MergeTreeIndexGranuleBloomFilter.h>
#include <Storages/MergeTree/MergeTreeIndexConditionBloomFilter.h>
#include <Parsers/ASTSubquery.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/ASTLiteral.h>
#include <Columns/ColumnTuple.h>
#include <Interpreters/misc.h>
#include <Interpreters/BloomFilterHash.h>
#include <Interpreters/castColumn.h>
#include <Interpreters/convertFieldToType.h>
@ -338,7 +338,7 @@ static bool indexOfCanUseBloomFilter(const ASTPtr & parent)
{
return true;
}
else if (function->name == "equals"
else if (function->name == "equals" /// notEquals is not applicable
|| function->name == "greater" || function->name == "greaterOrEquals"
|| function->name == "less" || function->name == "lessOrEquals")
{
@ -346,24 +346,33 @@ static bool indexOfCanUseBloomFilter(const ASTPtr & parent)
return false;
/// We don't allow constant expressions like `indexOf(arr, x) = 1 + 0` but it's neglible.
/// We should return true when the corresponding expression implies that the array contains the element.
/// Example: when `indexOf(arr, x)` > 10 is written, it means that arr definitely should contain the element
/// (at least at 11th position but it does not matter).
bool reversed = false;
const ASTLiteral * constant = nullptr;
if (const ASTLiteral * left = function->arguments->children[0]->as<ASTLiteral>())
{
if (function->name == "equals" && left->value.get<Int64>() != 0)
return true;
else if (function->name == "less" && left->value.get<Int64>() >= 0)
return true;
else if (function->name == "lessOrEquals" && left->value.get<Int64>() > 0)
return true;
constant = left;
reversed = true;
}
else if (const ASTLiteral * right = function->arguments->children[1]->as<ASTLiteral>())
{
if (function->name == "equals" && right->value.get<Int64>() != 0)
return true;
else if (function->name == "greater" && right->value.get<Int64>() >= 0)
return true;
else if (function->name == "greaterOrEquals" && right->value.get<Int64>() > 0)
return true;
constant = right;
}
else
return false;
Field zero(0);
return (function->name == "equals" /// indexOf(...) = c, c != 0
&& !applyVisitor(FieldVisitorAccurateEquals(), constant->value, zero))
|| (function->name == (reversed ? "less" : "greater") /// indexOf(...) > c, c >= 0
&& !applyVisitor(FieldVisitorAccurateLess(), constant->value, zero))
|| (function->name == (reversed ? "lessOrEquals" : "greaterOrEquals") /// indexOf(...) >= c, c > 0
&& applyVisitor(FieldVisitorAccurateLess(), zero, constant->value));
}
}