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CurtizJ 2019-09-02 18:22:27 +03:00
parent de5e2b4d6b
commit e122d54dcb
3 changed files with 12 additions and 4 deletions
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4
dbms/src/Common/FillingRow.h
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@ -10,6 +10,10 @@ namespace DB
bool less(const Field & lhs, const Field & rhs, int direction);
bool equals(const Field & lhs, const Field & rhs);
/** Helps to implement modifier WITH FILL for ORDER BY clause.
* Stores row as array of fields and provides functions to generate next row for filling gaps and for comparing rows.
* Used in FillingBlockInputStream and in FillingTransform.
*/
class FillingRow
{
public:

6
dbms/src/DataStreams/FillingBlockInputStream.h
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@ -6,8 +6,10 @@
namespace DB
{
/** Implements the WITH FILL part of ORDER BY operation.
*/
/** Implements modifier WITH FILL of ORDER BY clause.
* It fills gaps in data stream by rows with missing values in columns with set WITH FILL and deafults in other columns.
* Optionally FROM, TO and STEP values can be specified.
*/
class FillingBlockInputStream : public IBlockInputStream
{
public:

6
dbms/src/Processors/Transforms/FillingTransform.h
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@ -6,8 +6,10 @@
namespace DB
{
/** Implements the WITH FILL part of ORDER BY operation.
*/
/** Implements modifier WITH FILL of ORDER BY clause.
* It fills gaps in data stream by rows with missing values in columns with set WITH FILL and deafult values in other columns.
* Optionally FROM, TO and STEP values can be specified.
*/
class FillingTransform : public ISimpleTransform
{
public: