Package io.deephaven.engine.table.impl.select

Class DhFormulaColumn

java.lang.Object

io.deephaven.engine.table.impl.select.AbstractFormulaColumn

io.deephaven.engine.table.impl.select.DhFormulaColumn

All Implemented Interfaces:

Selectable, FormulaColumn, SelectColumn

public class DhFormulaColumn
extends AbstractFormulaColumn

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.engine.table.impl.select.SelectColumn

SelectColumn.ExpressionAdapter

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	useKernelFormulasProperty

Fields inherited from class io.deephaven.engine.table.impl.select.AbstractFormulaColumn

ALLOW_UNSAFE_REFRESHING_FORMULAS, COLUMN_SUFFIX, columnDefinitions, columnName, columnSources, formulaFactoryFuture, formulaString, originalFormulaString, params, returnedType, usedColumnArrays, usedColumns, usesI, usesII, usesK

Fields inherited from interface io.deephaven.engine.table.impl.select.SelectColumn

ZERO_LENGTH_SELECT_COLUMN_ARRAY

Method Summary

Modifier and Type	Method	Description
SelectColumn	copy()	Create a copy of this SelectColumn.
FormulaColumnPython	getFormulaColumnPython()
protected CompletionStageFuture<FormulaKernelFactory>	getFormulaKernelFactory(@NotNull QueryCompilerRequestProcessor compilationRequestProcessor)
Pair<String,Map<Long,List<MatchPair>>>	getFormulaShiftColPair()	Returns a Pair object consisting of formula string and shift to column MatchPairs.
protected FormulaSourceDescriptor	getSourceDescriptor()
static Class<?>	getVectorType(Class<?> declaredType)
boolean	hasConstantValue()
List<String>	initDef(@NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap)	Initialize any internal column definitions from the provided initial.
List<String>	initDef(@NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap, @NotNull QueryCompilerRequestProcessor compilationRequestProcessor)	Initialize any internal column definitions from the provided initial.
boolean	isStateless()	Returns true if this column is stateless (i.e.

Methods inherited from class io.deephaven.engine.table.impl.select.AbstractFormulaColumn

applyUsedVariables, createKernelFormulaFactory, getColumnArrays, getColumns, getDataView, getLazyView, getMatchPair, getName, getReturnedComponentType, getReturnedType, hasVirtualRowVariables, initInputs, isRetain, newDestInstance, newFlatDestInstance, onCopy, toString, validateColumnDefinition, validateSafeForRefresh

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.deephaven.engine.table.impl.select.FormulaColumn

hasConstantArrayAccess

Methods inherited from interface io.deephaven.engine.table.impl.select.SelectColumn

expression, newColumn, recomputeOnModifiedRow, withRecomputeOnModifiedRow

Field Details

useKernelFormulasProperty

public static boolean useKernelFormulasProperty

Method Details

getFormulaColumnPython

public FormulaColumnPython getFormulaColumnPython()

getVectorType

public static Class<?> getVectorType(Class<?> declaredType)

initDef

public List<String> initDef(@NotNull
 @NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap)

Description copied from interface: SelectColumn

Initialize any internal column definitions from the provided initial. Any formulae will be compiled immediately using the QueryCompiler in the current ExecutionContext.

Parameters:

columnDefinitionMap - the starting set of column definitions; valid for this call only

Returns:

a list of columns on which the result of this is dependent

initDef

public List<String> initDef(@NotNull
 @NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap,
 @NotNull
 @NotNull QueryCompilerRequestProcessor compilationRequestProcessor)

Description copied from interface: SelectColumn

Initialize any internal column definitions from the provided initial. A compilation request consumer is provided to allow for deferred compilation of expressions that belong to the same query.

Compilations must be resolved before using this SelectColumn.

Parameters:

columnDefinitionMap - the starting set of column definitions; valid for this call only

compilationRequestProcessor - a consumer to submit compilation requests; valid for this call only

Returns:

a list of columns on which the result of this is dependent

getSourceDescriptor

protected FormulaSourceDescriptor getSourceDescriptor()

Specified by:

getSourceDescriptor in class AbstractFormulaColumn

getFormulaKernelFactory

protected CompletionStageFuture<FormulaKernelFactory> getFormulaKernelFactory(@NotNull
 @NotNull QueryCompilerRequestProcessor compilationRequestProcessor)

copy

public SelectColumn copy()

Description copied from interface: SelectColumn

Create a copy of this SelectColumn.

Returns:

an independent copy of this SelectColumn.

hasConstantValue

public boolean hasConstantValue()

Returns:

true if all rows have a single constant value

getFormulaShiftColPair

public Pair<String,Map<Long,List<MatchPair>>> getFormulaShiftColPair()

Description copied from interface: FormulaColumn

Returns a Pair object consisting of formula string and shift to column MatchPairs. If the column formula or expression has Array Access that conforms to "i +/- <constant>" or "ii +/- <constant>". If there is a parsing error for the expression null is returned.

Returns:

Pair of final formula string and shift to column MatchPairs.

isStateless

public boolean isStateless()

Description copied from interface: SelectColumn

Returns true if this column is stateless (i.e. one row does not depend on the order of evaluation for another row).