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arangodb
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implemented LENGTH in C++

This commit is contained in:
Jan Steemann 2014-12-04 17:10:48 +01:00
parent cc00bb8897
commit 4564f13bc8
4 changed files with 48 additions and 4 deletions
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2
arangod/Aql/Executor.cpp
View File

@ -137,7 +137,7 @@ std::unordered_map<std::string, Function const> const Executor::FunctionNames{
{ "MINUS", Function("MINUS", "AQL_MINUS", "l,l|+", true, false, true) },
{ "INTERSECTION", Function("INTERSECTION", "AQL_INTERSECTION", "l,l|+", true, false, true) },
{ "FLATTEN", Function("FLATTEN", "AQL_FLATTEN", "l|n", true, false, true) },
{ "LENGTH", Function("LENGTH", "AQL_LENGTH", "las", true, false, true) },
{ "LENGTH", Function("LENGTH", "AQL_LENGTH", "las", true, false, true, &Functions::Length) },
{ "MIN", Function("MIN", "AQL_MIN", "l", true, false, true) },
{ "MAX", Function("MAX", "AQL_MAX", "l", true, false, true) },
{ "SUM", Function("SUM", "AQL_SUM", "l", true, false, true) },

45
arangod/Aql/Functions.cpp
View File

@ -100,6 +100,51 @@ AqlValue Functions::IsDocument (triagens::arango::AqlTransaction* trx,
return AqlValue(new Json(j.isArray()));
}
////////////////////////////////////////////////////////////////////////////////
/// @brief function LENGTH
////////////////////////////////////////////////////////////////////////////////
AqlValue Functions::Length (triagens::arango::AqlTransaction* trx,
TRI_document_collection_t const* collection,
AqlValue const parameters) {
Json j(parameters.extractListMember(trx, collection, 0, false));
TRI_json_t const* json = j.json();
size_t length = 0;
if (json != nullptr) {
switch (json->_type) {
case TRI_JSON_UNUSED:
case TRI_JSON_NULL:
length = strlen("null");
break;
case TRI_JSON_BOOLEAN:
length = (json->_value._boolean ? strlen("true") : strlen("false"));
break;
case TRI_JSON_NUMBER:
case TRI_JSON_STRING:
case TRI_JSON_STRING_REFERENCE:
// return number of characters (not byteS) in string
length = TRI_CharLengthUtf8String(json->_value._string.data);
break;
case TRI_JSON_ARRAY:
// return number of attributes
length = json->_value._objects._length / 2;
break;
case TRI_JSON_LIST:
// return list length
length = TRI_LengthListJson(json);
break;
}
}
return AqlValue(new Json(static_cast<double>(length)));
}
// -----------------------------------------------------------------------------
// --SECTION-- END-OF-FILE
// -----------------------------------------------------------------------------

2
arangod/Aql/Functions.h
View File

@ -32,6 +32,7 @@
#include "Basics/Common.h"
#include "Aql/AqlValue.h"
#include "Basics/tri-strings.h"
#include "Utils/AqlTransaction.h"
#include <functional>
@ -55,6 +56,7 @@ namespace triagens {
static AqlValue IsString (triagens::arango::AqlTransaction*, TRI_document_collection_t const*, AqlValue const);
static AqlValue IsList (triagens::arango::AqlTransaction*, TRI_document_collection_t const*, AqlValue const);
static AqlValue IsDocument (triagens::arango::AqlTransaction*, TRI_document_collection_t const*, AqlValue const);
static AqlValue Length (triagens::arango::AqlTransaction*, TRI_document_collection_t const*, AqlValue const);
};
}

3
lib/Basics/tri-strings.h
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@ -342,9 +342,6 @@ size_t TRI_CharLengthUtf8String (const char*);
char* TRI_PrefixUtf8String (const char*, const uint32_t);
#endif
// -----------------------------------------------------------------------------