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correct 'notLike' in key condition

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This commit is contained in:
Duc Canh Le 2022-10-28 13:39:01 +08:00
parent 69311bd5cd
commit c080964391
2 changed files with 5 additions and 3 deletions
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6
src/Storages/MergeTree/KeyCondition.cpp
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@ -55,7 +55,7 @@ String Range::toString() const
/// Example: for `Hello\_World% ...` string it returns `Hello_World`, and for `%test%` returns an empty string.
String extractFixedPrefixFromLikePattern(const String & like_pattern)
String extractFixedPrefixFromLikePattern(const String & like_pattern, bool perfect_prefix_match)
{
String fixed_prefix;
@ -68,6 +68,8 @@ String extractFixedPrefixFromLikePattern(const String & like_pattern)
case '%':
[[fallthrough]];
case '_':
if (perfect_prefix_match && std::find_if(pos+1, end, [](const char c) { return c != '%' && c != '_'; }) != end)
return "";
return fixed_prefix;
case '\\':
@ -567,7 +569,7 @@ const KeyCondition::AtomMap KeyCondition::atom_map
if (value.getType() != Field::Types::String)
return false;
String prefix = extractFixedPrefixFromLikePattern(value.get<const String &>());
String prefix = extractFixedPrefixFromLikePattern(value.get<const String &>(), true);
if (prefix.empty())
return false;

2
src/Storages/MergeTree/KeyCondition.h
View File

@ -481,6 +481,6 @@ private:
bool strict;
};
String extractFixedPrefixFromLikePattern(const String & like_pattern);
String extractFixedPrefixFromLikePattern(const String & like_pattern, bool perfect_prefix_match = false);
}