mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
29 lines
777 B
C++
29 lines
777 B
C++
#include <Functions/FunctionFactory.h>
|
|
#include <Functions/FunctionsVisitParam.h>
|
|
#include <Functions/FunctionsStringSearch.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
struct ExtractBool
|
|
{
|
|
using ResultType = UInt8;
|
|
|
|
static UInt8 extract(const UInt8 * begin, const UInt8 * end)
|
|
{
|
|
return begin + 4 <= end && 0 == strncmp(reinterpret_cast<const char *>(begin), "true", 4);
|
|
}
|
|
};
|
|
|
|
struct NameSimpleJSONExtractBool { static constexpr auto name = "simpleJSONExtractBool"; };
|
|
using FunctionSimpleJSONExtractBool = FunctionsStringSearch<ExtractParamImpl<NameSimpleJSONExtractBool, ExtractBool>>;
|
|
|
|
REGISTER_FUNCTION(VisitParamExtractBool)
|
|
{
|
|
factory.registerFunction<FunctionSimpleJSONExtractBool>();
|
|
factory.registerAlias("visitParamExtractBool", "simpleJSONExtractBool");
|
|
}
|
|
|
|
}
|