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Added UUIDToNum and UUDv7ToDateTime functions
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pet74alex
GitHub
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commit
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@ -1,14 +1,18 @@
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#include <Columns/ColumnDecimal.h>
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#include <Columns/ColumnsDateTime.h>
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#include <Columns/ColumnFixedString.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#include <Columns/ColumnVector.h>
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#include <Common/BitHelpers.h>
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#include <base/hex.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeFixedString.h>
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#include <DataTypes/DataTypeUUID.h>
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#include <Functions/FunctionFactory.h>
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#include <Functions/IFunction.h>
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#include <Functions/FunctionHelpers.h>
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#include <Functions/extractTimeZoneFromFunctionArguments.h>
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#include <IO/WriteHelpers.h>
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#include <Interpreters/Context_fwd.h>
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#include <Interpreters/castColumn.h>
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@ -319,10 +323,191 @@ public:
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}
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};
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class FunctionUUIDToNum : public IFunction
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{
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public:
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static constexpr auto name = "UUIDToNum";
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionUUIDToNum>(); }
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String getName() const override { return name; }
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size_t getNumberOfArguments() const override { return 0; }
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bool isInjective(const ColumnsWithTypeAndName &) const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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bool isVariadic() const override { return true; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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checkArgumentCount(arguments, name);
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if (!isUUID(arguments[0]))
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{
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of first argument of function {}, expected UUID",
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arguments[0]->getName(),
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getName());
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}
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checkFormatArgument(arguments, name);
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return std::make_shared<DataTypeFixedString>(uuid_bytes_length);
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}
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bool useDefaultImplementationForConstants() const override { return true; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
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{
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const ColumnWithTypeAndName & col_type_name = arguments[0];
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const ColumnPtr & column = col_type_name.column;
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const bool defaultFormat = (parseVariant(arguments) == UUIDSerializer::Variant::Default);
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if (const auto * col_in = checkAndGetColumn<ColumnUUID>(column.get()))
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{
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const auto & vec_in = col_in->getData();
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const UUID * uuids = vec_in.data();
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const size_t size = vec_in.size();
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auto col_res = ColumnFixedString::create(uuid_bytes_length);
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ColumnString::Chars & vec_res = col_res->getChars();
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vec_res.resize(size * uuid_bytes_length);
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size_t dst_offset = 0;
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for (size_t i = 0; i < size; ++i)
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{
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uint64_t hiBytes = DB::UUIDHelpers::getHighBytes(uuids[i]);
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uint64_t loBytes = DB::UUIDHelpers::getLowBytes(uuids[i]);
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unalignedStoreBigEndian<uint64_t>(&vec_res[dst_offset], hiBytes);
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unalignedStoreBigEndian<uint64_t>(&vec_res[dst_offset + sizeof(hiBytes)], loBytes);
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if (!defaultFormat)
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{
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std::swap(vec_res[dst_offset], vec_res[dst_offset + 3]);
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std::swap(vec_res[dst_offset + 1], vec_res[dst_offset + 2]);
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}
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dst_offset += uuid_bytes_length;
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}
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return col_res;
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}
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else
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}", arguments[0].column->getName(), getName());
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}
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};
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class FunctionUUIDv7ToDateTime : public IFunction
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{
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public:
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static constexpr auto name = "UUIDv7ToDateTime";
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static constexpr UInt32 DATETIME_SCALE = 3;
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static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionUUIDv7ToDateTime>(); }
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String getName() const override { return name; }
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size_t getNumberOfArguments() const override { return 0; }
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bool isInjective(const ColumnsWithTypeAndName &) const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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bool isVariadic() const override { return true; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override
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{
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if (arguments.empty() || arguments.size() > 2)
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throw Exception(
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "Wrong number of arguments for function {}: should be 1 or 2", getName());
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if (!checkAndGetDataType<DataTypeUUID>(arguments[0].type.get()))
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{
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of first argument of function {}, expected UUID",
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arguments[0].type->getName(),
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getName());
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}
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String timezone;
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if (arguments.size() == 2)
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{
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timezone = extractTimeZoneNameFromColumn(arguments[1].column.get(), arguments[1].name);
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if (timezone.empty())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Function {} supports a 2nd argument (optional) that must be a valid time zone",
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getName());
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}
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return std::make_shared<DataTypeDateTime64>(DATETIME_SCALE, timezone);
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}
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bool useDefaultImplementationForConstants() const override { return true; }
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
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{
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const ColumnWithTypeAndName & col_type_name = arguments[0];
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const ColumnPtr & column = col_type_name.column;
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if (const auto * col_in = checkAndGetColumn<ColumnUUID>(column.get()))
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{
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const auto & vec_in = col_in->getData();
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const UUID * uuids = vec_in.data();
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const size_t size = vec_in.size();
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auto col_res = ColumnDateTime64::create(size, DATETIME_SCALE);
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auto & vec_res = col_res->getData();
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for (size_t i = 0; i < size; ++i)
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{
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uint64_t hiBytes = DB::UUIDHelpers::getHighBytes(uuids[i]);
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if ((hiBytes & 0xf000) == 0x7000)
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{
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uint64_t ms = hiBytes >> 16;
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vec_res[i] = DecimalUtils::decimalFromComponents<DateTime64>(
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ms / intExp10(DATETIME_SCALE), ms % intExp10(DATETIME_SCALE), DATETIME_SCALE);
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}
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}
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return col_res;
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}
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else
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throw Exception(
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ErrorCodes::ILLEGAL_COLUMN, "Illegal column {} of argument of function {}", arguments[0].column->getName(), getName());
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}
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};
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REGISTER_FUNCTION(CodingUUID)
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{
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factory.registerFunction<FunctionUUIDNumToString>();
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factory.registerFunction<FunctionUUIDStringToNum>();
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factory.registerFunction<FunctionUUIDToNum>(
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FunctionDocumentation{
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.description = R"(
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This function accepts a UUID and returns a FixedString(16) as its binary representation, with its format optionally specified by variant (Big-endian by default).
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)",
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.examples{
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{"uuid",
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"select toUUID(UUIDNumToString(toFixedString('a/<@];!~p{jTj={)', 16))) as uuid, UUIDToNum(uuid) as uuidNum, "
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"UUIDToNum(uuid, 2) as uuidMsNum",
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R"(
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┌─uuid─────────────────────────────────┬─uuidNum──────────┬─uuidMsNum────────┐
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│ 612f3c40-5d3b-217e-707b-6a546a3d7b29 │ a/<@];!~p{jTj={) │ @</a];!~p{jTj={) │
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└──────────────────────────────────────┴──────────────────┴──────────────────┘
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)"}},
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.categories{"UUID"}},
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FunctionFactory::CaseSensitive);
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factory.registerFunction<FunctionUUIDv7ToDateTime>(
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FunctionDocumentation{
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.description = R"(
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This function extracts the timestamp from a UUID and returns it as a DateTime64(3) typed value.
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The function expects the UUID having version 7 to be provided as the first argument.
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An optional second argument can be passed to specify a timezone for the timestamp.
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)",
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.examples{
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{"uuid","select UUIDv7ToDateTime(generateUUIDv7())", ""},
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{"uuid","select generateUUIDv7() as uuid, UUIDv7ToDateTime(uuid), UUIDv7ToDateTime(uuid, 'America/New_York')", ""}},
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.categories{"UUID"}},
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FunctionFactory::CaseSensitive);
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}
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}
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