Package com.illumon.iris.db.v2.select

Interface FormulaColumn

All Superinterfaces:

SelectColumn

All Known Implementing Classes:

AbstractFormulaColumn, DhFormulaColumn, NumbaFormulaColumn

public interface FormulaColumn
extends SelectColumn

Field Summary

Fields inherited from interface com.illumon.iris.db.v2.select.SelectColumn

ZERO_LENGTH_SELECT_COLUMN_ARRAY

Method Summary

Modifier and Type	Method	Description
static FormulaColumn	createFormulaColumn(String columnName, String formulaString)
static FormulaColumn	createFormulaColumn(String columnName, String formulaString, FormulaParserConfiguration parser)
static FormulaColumn	createFormulaColumn(String columnName, String formulaString, FormulaParserConfiguration parser, boolean alwaysUpdate)
default com.fishlib.base.Pair<String,Map<Long,List<MatchPair>>>	getFormulaShiftColPair()	Returns a Pair object consisting of formula string and shift to column MatchPairs.
default boolean	hasConstantArrayAccess()	Returns true if the formula expression of the column has Array Access that conforms to "i +/- <constant>" or "ii +/- <constant>".
default boolean	hasConstantValue()	returns true if the column only has single constant value for all rows.
ColumnSource	updateData(WritableSource result, long destPos, long sourcePos)

Methods inherited from interface com.illumon.iris.db.v2.select.SelectColumn

alwaysEvaluate, alwaysEvaluateCopy, copy, disallowRefresh, getColumnArrays, getColumns, getConstantValueView, getDataView, getLazyView, getMatchPair, getName, getReturnedType, initDef, initInputs, initInputs, isRetain, newDestInstance

Method Details

createFormulaColumn

static FormulaColumn createFormulaColumn(String columnName, String formulaString, FormulaParserConfiguration parser)

createFormulaColumn

static FormulaColumn createFormulaColumn(String columnName, String formulaString, FormulaParserConfiguration parser, boolean alwaysUpdate)

createFormulaColumn

static FormulaColumn createFormulaColumn(String columnName, String formulaString)

updateData

ColumnSource updateData(WritableSource result, long destPos, long sourcePos)

hasConstantValue

default boolean hasConstantValue()

returns true if the column only has single constant value for all rows.

Returns:

true if column rows only have single constant value

hasConstantArrayAccess

default boolean hasConstantArrayAccess()

Returns true if the formula expression of the column has Array Access that conforms to "i +/- <constant>" or "ii +/- <constant>".

Returns:

true or false

getFormulaShiftColPair

default com.fishlib.base.Pair<String,Map<Long,List<MatchPair>>> getFormulaShiftColPair()

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.