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Comparison between DateTime64 and String values (just like for DateTime)
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Vasily Nemkov
parent
228dbf475e
commit
86edceeb81
@ -1125,12 +1125,10 @@ public:
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if (!((both_represented_by_number && !has_date) /// Do not allow compare date and number.
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|| (left.isStringOrFixedString() && right.isStringOrFixedString())
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|| (left.isDate() && right.isDate())
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|| (left.isDate() && right.isString()) /// You can compare the date, datetime and an enumeration with a constant string.
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|| (left.isString() && right.isDate())
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|| (left.isDateTime() && right.isDateTime())
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|| (left.isDateTime() && right.isString())
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|| (left.isString() && right.isDateTime())
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/// You can compare the date, datetime, or datatime64 and an enumeration with a constant string.
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|| (left.isString() && right.isDateOrDateTime())
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|| (left.isDateOrDateTime() && right.isString())
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|| (left.isDateOrDateTime() && right.isDateOrDateTime() && left.idx == right.idx) /// only date vs date, or datetime vs datetime
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|| (left.isUUID() && right.isUUID())
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|| (left.isUUID() && right.isString())
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|| (left.isString() && right.isUUID())
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@ -1228,6 +1226,65 @@ public:
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{
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executeTuple(block, result, col_with_type_and_name_left, col_with_type_and_name_right, input_rows_count);
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}
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else if (which_left.idx != which_right.idx
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&& (which_left.isDateTime64() || which_right.isDateTime64())
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&& (which_left.isStringOrFixedString() || which_right.isStringOrFixedString()))
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{
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/** Special case of comparing DateTime64 against a string.
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*
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* Can't be moved to executeDateOrDateTimeOrEnumOrUUIDWithConstString()
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* since DateTime64 is basically a Decimal, but we do similar things, except type inference.
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* Outline:
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* - Extract string content
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* - Parse it as a ColumnDateTime64 value (same type as DateTime64, means same precision)
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* - Fabricate a column with type and name
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* - Compare left and right comlumns as DateTime64 columns.
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*/
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const size_t datetime64_col_index = which_left.isDateTime64() ? 0 : 1;
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const size_t string_col_index = which_left.isStringOrFixedString() ? 0 : 1;
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const auto & datetime64_col_with_type_and_name = block.getByPosition(arguments[datetime64_col_index]);
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const auto & string_col_with_type_and_name = block.getByPosition(arguments[string_col_index]);
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if (!isColumnConst(*string_col_with_type_and_name.column))
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throw Exception(getName() + ", illegal column type of argument #" + std::to_string(string_col_index)
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+ " '" + string_col_with_type_and_name.name + "'"
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" expected const String or const FixedString,"
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" got " + string_col_with_type_and_name.type->getName(),
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ErrorCodes::ILLEGAL_COLUMN);
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if (datetime64_col_with_type_and_name.column->size() == 0 || string_col_with_type_and_name.column->size() == 0)
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{
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// For some reason, when both left and right columns are empty (dry run while building a header block)
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// executeDecimal() fills result column with bogus value.
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block.getByPosition(result).column = ColumnUInt8::create();
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return;
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}
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auto parsed_tmp_column_holder = datetime64_col_with_type_and_name.type->createColumn();
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{
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const StringRef string_value = string_col_with_type_and_name.column->getDataAt(0);
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ReadBufferFromMemory in(string_value.data, string_value.size);
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datetime64_col_with_type_and_name.type->deserializeAsWholeText(*parsed_tmp_column_holder, in, FormatSettings{});
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if (!in.eof())
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throw Exception(getName() + ": String is too long for " + datetime64_col_with_type_and_name.type->getName() + " : " + string_value.toString(), ErrorCodes::TOO_LARGE_STRING_SIZE);
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}
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// It is necessary to wrap tmp column in ColumnConst to avoid overflow when comparing.
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// (non-const columns are expected to have same number of rows as every other column in block).
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const ColumnWithTypeAndName parsed_tmp_col_with_type_and_name{
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ColumnConst::create(std::move(parsed_tmp_column_holder), 1),
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datetime64_col_with_type_and_name.type,
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string_col_with_type_and_name.name};
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executeDecimal(block, result,
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which_left.isDateTime64() ? datetime64_col_with_type_and_name : parsed_tmp_col_with_type_and_name,
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which_right.isDateTime64() ? datetime64_col_with_type_and_name : parsed_tmp_col_with_type_and_name);
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}
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else if (isColumnedAsDecimal(left_type) || isColumnedAsDecimal(right_type))
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{
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// compare
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@ -0,0 +1,15 @@
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in SELECT
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1
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1
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1
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1
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in WHERE
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0
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0
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0
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0
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other operators
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0
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0
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0
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0
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35
tests/queries/0_stateless/01268_DateTime64_in_WHERE.sql
Normal file
35
tests/queries/0_stateless/01268_DateTime64_in_WHERE.sql
Normal file
@ -0,0 +1,35 @@
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-- Error cases:
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-- non-const string column
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT DT64 = materialize(S); -- {serverError 44}
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT materialize(S) = toDateTime64(S, 3); -- {serverError 44}
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 = materialize(S); -- {serverError 44}
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE materialize(S) = DT64; -- {serverError 44}
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SELECT * WHERE toDateTime64(123.345, 3) == 'ABCD'; -- {serverError 131} -- invalid DateTime64 string
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SELECT * WHERE toDateTime64(123.345, 3) == '2020-02-05 14:34:12.33333333333333333333333333333333333333333333333333333333'; -- {serverError 131} -- invalid string length
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SELECT 'in SELECT';
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT DT64 = S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT S = DT64;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT materialize(DT64) = S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT S = materialize(DT64);
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SELECT 'in WHERE';
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 = S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S = DT64;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE materialize(DT64) = S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S = materialize(DT64);
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SELECT 'other operators';
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 <= S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 >= S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S <= DT64;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S >= DT64;
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-- empty results
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 < S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 > S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE DT64 != S;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S < DT64;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S > DT64;
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WITH '2020-02-05 14:34:12.333' as S, toDateTime64(S, 3) as DT64 SELECT * WHERE S != DT64;
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