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This commit is contained in:
Nikita Vasilev 2019-02-04 16:42:13 +03:00
parent fa07d1cf86
commit 5a7ca354a5
1 changed files with 4 additions and 2 deletions
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6
dbms/src/Storages/MergeTree/MergeTreeUniqueIndex.cpp
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@ -14,6 +14,8 @@
namespace DB namespace DB
{ {
const Field UNKNOWN_FIELD = Field(3);
namespace ErrorCodes namespace ErrorCodes
{ {
extern const int INCORRECT_QUERY; extern const int INCORRECT_QUERY;
@ -162,7 +164,7 @@ UniqueCondition::UniqueCondition(
expression_ast = select.prewhere_expression->clone(); expression_ast = select.prewhere_expression->clone();
else else
/// 0b11 -- can be true and false at the same time /// 0b11 -- can be true and false at the same time
expression_ast = std::make_shared<ASTLiteral>(Field(3)); expression_ast = std::make_shared<ASTLiteral>(UNKNOWN_FIELD);
/// Do not proceed if index is useless for this query. /// Do not proceed if index is useless for this query.
if ((useless = checkASTAlwaysUnknownOrTrue(expression_ast))) if ((useless = checkASTAlwaysUnknownOrTrue(expression_ast)))
@ -218,7 +220,7 @@ void UniqueCondition::traverseAST(ASTPtr & node) const
} }
if (!atomFromAST(node)) if (!atomFromAST(node))
node = std::make_shared<ASTLiteral>(Field(3)); /// can_be_true=1 can_be_false=1 node = std::make_shared<ASTLiteral>(UNKNOWN_FIELD); /// can_be_true=1 can_be_false=1
} }
bool UniqueCondition::atomFromAST(ASTPtr & node) const bool UniqueCondition::atomFromAST(ASTPtr & node) const