1 | #include <Functions/FunctionFactory.h> |
---|---|
2 | #include <Functions/FunctionsVisitParam.h> |
3 | #include <Functions/FunctionsStringSearch.h> |
4 | |
5 | |
6 | namespace DB |
7 | { |
8 | |
9 | struct ExtractBool |
10 | { |
11 | using ResultType = UInt8; |
12 | |
13 | static UInt8 extract(const UInt8 * begin, const UInt8 * end) |
14 | { |
15 | return begin + 4 <= end && 0 == strncmp(reinterpret_cast<const char *>(begin), "true", 4); |
16 | } |
17 | }; |
18 | |
19 | struct NameVisitParamExtractBool { static constexpr auto name = "visitParamExtractBool"; }; |
20 | using FunctionVisitParamExtractBool = FunctionsStringSearch<ExtractParamImpl<ExtractBool>, NameVisitParamExtractBool>; |
21 | |
22 | |
23 | void registerFunctionVisitParamExtractBool(FunctionFactory & factory) |
24 | { |
25 | factory.registerFunction<FunctionVisitParamExtractBool>(); |
26 | } |
27 | |
28 | } |
29 |