Uses of Class ai.rapids.cudf.ColumnView (cudfjni 22.02.0 API)

Packages that use ColumnView
Package Description

ai.rapids.cudf

Packages that use ColumnView
Package	Description
ai.rapids.cudf

Uses of ColumnView in ai.rapids.cudf

Subclasses of ColumnView in ai.rapids.cudf
Modifier and Type	Class and Description
`class`	`ColumnVector` This class represents the immutable vector of data.

Methods in ai.rapids.cudf that return ColumnView
Modifier and Type	Method and Description
`ColumnView`	ColumnView.`bitCastTo(DType type)` Zero-copy cast between types with the same underlying length.
`static ColumnView`	ColumnView.`fromDeviceBuffer(BaseDeviceMemoryBuffer buffer, long startOffset, DType type, int rows)` Create a new column view from a raw device buffer.
`ColumnView`	ColumnView.`getChildColumnView(int childIndex)` Returns the child column view at a given index.
`ColumnView[]`	ColumnView.`getChildColumnViews()` Returns the child column views for this view Please note that it is the responsibility of the caller to close these views.
`ColumnView[]`	Scalar.`getChildrenFromStructScalar()` Fetches views of children columns from struct scalar.
`ColumnView`	Scalar.`getListAsColumnView()` Returns the scalar value as a ColumnView.
`ColumnView`	ColumnView.`logicalCastTo(DType type)` Deprecated. this has changed to bit_cast in C++ so use that name instead
`static ColumnView`	ColumnView.`makeStructView(ColumnView... columns)` Create a new struct column view of existing column views.
`static ColumnView`	ColumnView.`makeStructView(long rows, ColumnView... columns)` Create a new struct column view of existing column views.
`ColumnView`	ColumnView.`replaceChildrenWithViews(int[] indices, ColumnView[] views)` This method takes in a nested type and replaces its children with the given views Note: Make sure the numbers of rows in the leaf node are the same as the child replacing it otherwise the list can point to elements outside of the column values.
`ColumnView`	ColumnView.`replaceListChild(ColumnView child)` This method takes in a list and returns a new list with the leaf node replaced with the given view.
`ColumnView[]`	ColumnView.`splitAsViews(int... indices)` Splits a ColumnView (including null values) into a set of ColumnViews according to a set of indices.
`ColumnView`	GatherMap.`toColumnView(long startRow, int numRows)` Create a column view that can be used to perform a gather operation.

Methods in ai.rapids.cudf with parameters of type ColumnView
Modifier and Type	Method and Description
`ColumnVector`	ColumnView.`addCalendricalMonths(ColumnView months)` Add the specified number of months to the timestamp.
`static ColumnVector`	ColumnVector.`concatenate(ColumnView... columns)` Create a new vector by concatenating multiple columns together.
`ColumnVector`	ColumnView.`contains(ColumnView needles)` Returns a new ColumnVector of `DType.BOOL8` elements containing true if the corresponding entry in haystack is contained in needles and false if it is not.
`static Table`	Table.`convertFromRows(ColumnView vec, DType... schema)` Convert a column of list of bytes that is formatted like the output from `convertToRows` and convert it back to a table.
`static Table`	Table.`convertFromRowsFixedWidthOptimized(ColumnView vec, DType... schema)` Convert a column of list of bytes that is formatted like the output from `convertToRows` and convert it back to a table.
`ColumnVector`	ColumnView.`copyWithBooleanColumnAsValidity(ColumnView boolColumn)` Creates a deep copy of a column while replacing the validity mask.
`Table`	Table.`filter(ColumnView mask)` Filters this table using a column of boolean values as a mask, returning a new one.
`ColumnVector`	ColumnView.`findAndReplaceAll(ColumnView oldValues, ColumnView newValues)` Returns a vector with all values "oldValues[i]" replaced with "newValues[i]".
`Table`	Table.`gather(ColumnView gatherMap)` Gathers the rows of this table according to `gatherMap` such that row "i" in the resulting table's columns will contain row "gatherMap[i]" from this table.
`Table`	Table.`gather(ColumnView gatherMap, OutOfBoundsPolicy outOfBoundsPolicy)` Gathers the rows of this table according to `gatherMap` such that row "i" in the resulting table's columns will contain row "gatherMap[i]" from this table.
`ColumnVector`	ColumnView.`ifElse(ColumnView trueValues, ColumnView falseValues)` For a BOOL8 vector, computes a vector whose rows are selected from two other vectors based on the boolean value of this vector in the corresponding row.
`ColumnVector`	ColumnView.`ifElse(ColumnView trueValues, Scalar falseValue)` For a BOOL8 vector, computes a vector whose rows are selected from two other inputs based on the boolean value of this vector in the corresponding row.
`ColumnVector`	ColumnView.`ifElse(Scalar trueValue, ColumnView falseValues)` For a BOOL8 vector, computes a vector whose rows are selected from two other inputs based on the boolean value of this vector in the corresponding row.
`static ColumnVector`	ColumnVector.`listConcatenateByRow(boolean ignoreNull, ColumnView... columns)` Concatenate columns of lists horizontally (row by row), combining a corresponding row from each column into a single list row of a new column.
`static ColumnVector`	ColumnVector.`listConcatenateByRow(ColumnView... columns)` Concatenate columns of lists horizontally (row by row), combining a corresponding row from each column into a single list row of a new column.
`ColumnVector`	ColumnView.`listContainsColumn(ColumnView key)` Create a column of bool values indicating whether the list rows of the first column contain the corresponding values in the second column.
`static Scalar`	Scalar.`listFromColumnView(ColumnView list)` Creates a scalar of list from a ColumnView.
`ColumnVector`	ColumnView.`listIndexOf(ColumnView keys, ColumnView.FindOptions findOption)` Create a column of int32 indices, indicating the position of each row in the search key column in the corresponding row of the lists column.
`static ColumnVector`	ColumnVector.`makeList(ColumnView... columns)` Create a LIST column from the given columns.
`static ColumnVector`	ColumnVector.`makeList(long rows, DType type, ColumnView... columns)` Create a LIST column from the given columns.
`ColumnVector`	ColumnVector.`makeListFromOffsets(long rows, ColumnView offsets)` Create a LIST column from the current column and a given offsets column.
`static ColumnVector`	ColumnVector.`makeStruct(ColumnView... columns)` Create a new struct vector made up of existing columns.
`static ColumnVector`	ColumnVector.`makeStruct(long rows, ColumnView... columns)` Create a new struct vector made up of existing columns.
`static ColumnView`	ColumnView.`makeStructView(ColumnView... columns)` Create a new struct column view of existing column views.
`static ColumnView`	ColumnView.`makeStructView(long rows, ColumnView... columns)` Create a new struct column view of existing column views.
`static ColumnVector`	ColumnVector.`md5Hash(ColumnView... columns)` Create a new vector containing the MD5 hash of each row in the table.
`ColumnVector`	ColumnView.`mergeAndSetValidity(BinaryOp mergeOp, ColumnView... columns)` Create a deep copy of the column while replacing the null mask.
`PartitionedTable`	Table.`partition(ColumnView partitionMap, int numberOfPartitions)` Partition this table using the mapping in partitionMap.
`Table`	Table.`repeat(ColumnView counts)` Create a new table by repeating each row of this table.
`Table`	Table.`repeat(ColumnView counts, boolean checkCount)` Create a new table by repeating each row of this table.
`ColumnVector`	ColumnView.`repeatStrings(ColumnView repeatTimes)` Given a strings column, an output strings column is generated by repeating each of the input string by a number of times given by the corresponding row in a `repeatTimes` numeric column.
`ColumnVector`	ColumnView.`repeatStrings(ColumnView repeatTimes, ColumnView outputStringSizes)` This function is an overloaded version of `repeatStrings`, with an additional parameter `outputStringSizes` that provides a column containing the pre-computed sizes of the output strings.
`ColumnView.StringSizes`	ColumnView.`repeatStringsSizes(ColumnView repeatTimes)` Compute sizes of the output strings if each string in an input strings column is repeated by a different number of times given by the corresponding row in a `repeatTimes` numeric column (i.e., compute sizes of the strings resulted from `repeatStringsWithColumnRepeatTimes(long, long, long)`).
`ColumnView`	ColumnView.`replaceChildrenWithViews(int[] indices, ColumnView[] views)` This method takes in a nested type and replaces its children with the given views Note: Make sure the numbers of rows in the leaf node are the same as the child replacing it otherwise the list can point to elements outside of the column values.
`ColumnView`	ColumnView.`replaceListChild(ColumnView child)` This method takes in a list and returns a new list with the leaf node replaced with the given view.
`ColumnVector`	ColumnView.`replaceMultiRegex(String[] patterns, ColumnView repls)` For each string, replaces any character sequence matching any of the regular expression patterns with the corresponding replacement strings.
`ColumnVector`	ColumnView.`replaceNulls(ColumnView replacements)` Returns a ColumnVector with any null values replaced with the corresponding row in the specified replacement column.
`Table`	Table.`scatter(ColumnView scatterMap, Table target, boolean checkBounds)` Scatters values from the source table into the target table out-of-place, returning a new result table.
`static Table`	Table.`scatter(Scalar[] source, ColumnView scatterMap, Table target, boolean checkBounds)` Scatters values from the source rows into the target table out-of-place, returning a new result table.
`static ColumnVector`	ColumnVector.`sequence(ColumnView start, ColumnView size)` Create a list column in which each row is a sequence of values starting from a `start` value, incrementing by one, and its cardinality is specified by a `size` value.
`static ColumnVector`	ColumnVector.`sequence(ColumnView start, ColumnView size, ColumnView step)` Create a list column in which each row is a sequence of values starting from a `start` value, incrementing by a `step` value, and its cardinality is specified by a `size` value.
`static ColumnVector`	ColumnVector.`serial32BitMurmurHash3(ColumnView[] columns)` Create a new vector containing the murmur3 hash of each row in the table, seed defaulted to 0.
`static ColumnVector`	ColumnVector.`serial32BitMurmurHash3(int seed, ColumnView[] columns)` Create a new vector containing the murmur3 hash of each row in the table.
`static ColumnVector`	ColumnVector.`spark32BitMurmurHash3(ColumnView[] columns)` Create a new vector containing spark's 32-bit murmur3 hash of each row in the table with the seed set to 0.
`static ColumnVector`	ColumnVector.`spark32BitMurmurHash3(int seed, ColumnView[] columns)` Create a new vector containing spark's 32-bit murmur3 hash of each row in the table.
`static ColumnVector`	ColumnVector.`stringConcatenate(ColumnView[] columns)` Concatenate columns of strings together, combining a corresponding row from each column into a single string row of a new column with no separator string inserted between each combined string and maintaining null values in combined rows.
`static ColumnVector`	ColumnVector.`stringConcatenate(ColumnView[] columns, ColumnView sepCol)` Concatenate columns of strings together using a separator specified for each row and returns the result as a string column.
`static ColumnVector`	ColumnVector.`stringConcatenate(ColumnView[] columns, ColumnView sepCol)` Concatenate columns of strings together using a separator specified for each row and returns the result as a string column.
`static ColumnVector`	ColumnVector.`stringConcatenate(ColumnView[] columns, ColumnView sepCol, Scalar separatorNarep, Scalar colNarep, boolean separateNulls)` Concatenate columns of strings together using a separator specified for each row and returns the result as a string column.
`static ColumnVector`	ColumnVector.`stringConcatenate(ColumnView[] columns, ColumnView sepCol, Scalar separatorNarep, Scalar colNarep, boolean separateNulls)` Concatenate columns of strings together using a separator specified for each row and returns the result as a string column.
`static ColumnVector`	ColumnVector.`stringConcatenate(Scalar separator, Scalar narep, ColumnView[] columns)` Concatenate columns of strings together, combining a corresponding row from each column into a single string row of a new column.
`static ColumnVector`	ColumnVector.`stringConcatenate(Scalar separator, Scalar narep, ColumnView[] columns, boolean separateNulls)` Concatenate columns of strings together, combining a corresponding row from each column into a single string row of a new column.
`ColumnVector`	ColumnView.`stringConcatenateListElements(ColumnView sepCol)` Given a lists column of strings (each row is a list of strings), concatenates the strings within each row and returns a single strings column result.
`ColumnVector`	ColumnView.`stringConcatenateListElements(ColumnView sepCol, Scalar separatorNarep, Scalar stringNarep, boolean separateNulls, boolean emptyStringOutputIfEmptyList)` Given a lists column of strings (each row is a list of strings), concatenates the strings within each row and returns a single strings column result.
`static Scalar`	Scalar.`structFromColumnViews(ColumnView... columns)` Creates a scalar of struct from a ColumnView.
`ColumnVector`	ColumnView.`substring(ColumnView start, ColumnView end)` Returns a new strings column that contains substrings of the strings in the provided column which uses unique ranges for each string
`static void`	Table.`writeColumnViewsToParquet(ParquetWriterOptions options, HostBufferConsumer consumer, ColumnView... columnViews)` This is an evolving API and most likely be removed in future releases.

Constructors in ai.rapids.cudf with parameters of type ColumnView
Constructor and Description
`ColumnView(DType type, long rows, Optional<Long> nullCount, BaseDeviceMemoryBuffer validityBuffer, BaseDeviceMemoryBuffer offsetBuffer, ColumnView[] children)` Create a new column view based off of data already on the device.

Uses of Classai.rapids.cudf.ColumnView

Uses of ColumnView in ai.rapids.cudf

Uses of Class
ai.rapids.cudf.ColumnView