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fix

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This commit is contained in:
Andrei Nekrashevich 2020-05-17 16:07:37 +03:00
parent c4ff7eec01
commit 9d2801e0d8
3 changed files with 11 additions and 18 deletions
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5
src/Functions/randomString.cpp
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@ -44,8 +44,9 @@ public:
"Function " + getName() + " requires at most two arguments: the size of resulting string and optional disambiguation tag",
ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
if (!isUnsignedInteger(*arguments[0]))
throw Exception("First argument for function " + getName() + " must be unsigned integer", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
const IDataType & length_type = *arguments[0];
if (!isNumber(length_type))
throw Exception("First argument of function " + getName() + " must have numeric type", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return std::make_shared<DataTypeString>();
}

21
src/Functions/randomStringUTF8.cpp
View File

@ -38,8 +38,8 @@ public:
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{
if (!isUnsignedInteger(*arguments[0]))
throw Exception("First argument for function " + getName() + " must be unsigned integer", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
if (!isNumber(*arguments[0]))
throw Exception("First argument of function " + getName() + " must have numeric type", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
return std::make_shared<DataTypeString>();
}
@ -86,7 +86,7 @@ public:
/// Generate highest byte in [0, 6]
/// https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
UInt32 code_point = (rand >> 16) * 7u;
code_point &= ((-1) ^ 0xFFFF);
code_point &= ~0xFFFF;
code_point |= rand & 0xFFFF; // and other bytes obtaining in a simple way
if (code_point >= 0x40000)
@ -97,14 +97,9 @@ public:
if (0xD7FF < code_point && code_point < 0xE000) // this range will not be valid in isValidUTF8
{
/* TODO(reviewer) choose with @axolm variant:
* 1. Not to do this if (isValidUTF8 can return 0)
* 2. just return 0
* 3. capture rng in lambda and do while(code_point is bad) { recalc... }
* 4. ...
* */
return 0u;
}
return code_point;
};
@ -114,7 +109,7 @@ public:
size_t utf8_len = length_column.getUInt(row_num);
auto * pos = data_to.data() + offset;
size_t last_writed_bytes = 0;
size_t last_writen_bytes = 0;
size_t i = 0;
for (; i < utf8_len; i += 2)
{
@ -125,13 +120,13 @@ public:
/// We have padding in column buffers that we can overwrite.
pos += UTF8::convert(*reinterpret_cast<int *>(&code_point1), pos, sizeof(int));
last_writed_bytes = UTF8::convert(*reinterpret_cast<int *>(&code_point2), pos, sizeof(int));
pos += last_writed_bytes;
last_writen_bytes = UTF8::convert(*reinterpret_cast<int *>(&code_point2), pos, sizeof(int));
pos += last_writen_bytes;
}
offset = pos - data_to.data() + 1;
if (i > utf8_len)
{
offset -= last_writed_bytes;
offset -= last_writen_bytes;
}
offsets_to[row_num] = offset;
}

3
tests/queries/0_stateless/01278_random_string_utf8.sql
View File

@ -1,8 +1,5 @@
SELECT randomStringUTF8('string'); -- { serverError 43 }
SELECT randomStringUTF8(-10); -- { serverError 43 }
SELECT lengthUTF8(randomStringUTF8(100));
SELECT toTypeName(randomStringUTF8(10));
SELECT isValidUTF8(randomStringUTF8(100000));
SELECT randomStringUTF8(0);
-- SELECT DISTINCT c > 30000 FROM (SELECT arrayJoin(arrayMap(x -> reinterpretAsUInt8(substring(randomStringUTF8(100), x + 1, 1)), range(100))) AS byte, count() AS c FROM numbers(100000) GROUP BY byte ORDER BY byte);