# MDX Function Reference

eazyBI uses Mondrian OLAP reporting engine and MDX query language implementation. In addition to Mondrian provided MDX functions eazyBI defines additional MDX functions which can be used in calculated member formulas. Please start with introduction about calculated members to learn how to create calculated members and MDX calculation formulas.

This page lists all supported MDX functions grouped by their category of return value, or you can select function by name from the alphabetical list in the table of contents (in the left navigation sidebar). eazyBI specific additional MDX functions (which are not available in standard Mondrian OLAP engine) are marked with EAZYBI.

Detailed function description pages are still work in progress. Please contact eazyBI support and let us know which function detailed description and examples you would like to be added to this documentation.

**On this page:**

## Date Functions

Function | Description |
---|---|

EAZYBI Returns the date plus the specified number of days. | |

DateAddWorkdays | EAZYBI Returns the date plus the specified number of workdays. |

DateParse | EAZYBI Returns the date that is parsed from a string argument. |

DateSerial | Returns the date for the specified year, month, and day. |

DateToTimestamp | EAZYBI Transforms date and time from date format to timestamp format (integer). |

DateWithoutTime | EAZYBI Returns the date without the time from the provided date or string argument. |

getDate | EAZYBI Similar to get function but will always return the member property value as a datetime value. |

NextStartDate | EAZYBI Returns the start date of the next time period. |

Now | Returns the current date and time according your eazyBI server system date and time. |

StartDate | EAZYBI Returns the time period start date. |

TimestampToDate | EAZYBI Transforms date and time from timestamp format (integer) to date format. |

## Hierarchy Functions

Function | Description |
---|---|

EAZYBI Returns the dimension hierarchy of the current member. | |

Hierarchy | Returns the hierarchy that contains a specified member or level. |

Dimension | Returns the dimension that contains a specified member, level, or hierarchy. |

Dimensions | Returns a hierarchy specified by a numeric or string expression. |

## Level Functions

Function | Description |
---|---|

Level | Returns the level of a member. |

Levels | Returns the level whose position in a dimension or hierarchy is specified by a numeric expression or whose name is specified by a string expression. |

## Logical Functions

Function | Description |
---|---|

AnyDateInPeriod | EAZYBI Returns if any date from comma separated string is between time period start and end dates. |

IsEmpty | Determines if an expression evaluates to the empty cell value. |

DateAfterPeriodEnd | EAZYBI Returns if date is after time period end date. |

DateBeforePeriodEnd | EAZYBI Returns if date is before time period end date. |

DateBetween | EAZYBI Returns if date is between other two dates. |

DateInPeriod | EAZYBI Returns if date is between time period start and end dates. |

getBoolean | EAZYBI Similar to get function but will always return the member property value as a boolean `true` or `false` value. |

## Member Functions

Function | Description |
---|---|

Ancestor | Returns the ancestor of a member at a specified level or distance. |

ClosingPeriod | Returns the last sibling among the descendants of a member at a specified level. |

CurrentDateMember | EAZYBI Returns the Time dimension hierarchy level member which contains current date. |

CurrentHierarchyMember | EAZYBI Returns the current dimension hierarchy member. |

CurrentMember | Returns the current member along a specified dimension or hierarchy during iteration. |

CurrentUser | EAZYBI Returns a key value of the user (from all user dimensions, for example, Assignee, Logged By etc) which is currently using eazyBI. |

CurrentUserEmail | EAZYBI Returns an email of the user which is currently using eazyBI. |

CurrentUserName | EAZYBI Returns a name of the user which is currently using eazyBI. |

DataMember | Returns the system-generated data member that is associated with a non-leaf member of a dimension. |

DateMembersBetween | EAZYBI Returns Time dimension level members between two dates. |

DefaultMember | Returns the default member of a dimension or hierarchy. |

FirstChild | Returns the first child of a member. |

FirstSibling | Returns the first child of the parent of a member. |

GetLinkedMember | EAZYBI Returns member with a specified key value in the same dimension and level. |

GetLinkedMembers | EAZYBI Returns members with a specified keys in the same dimension and level. |

GetLinkedMemberName | EAZYBI Returns name of linked member with a specified key value in the same dimension and level. |

GetLinkedMemberNames | EAZYBI Returns names of members with a specified keys in the same dimension and level. |

GetMemberByKey | EAZYBI Returns level member with specified key value. |

GetMembersByKeys | EAZYBI Returns level members with specified key values. |

GetMemberNamebyKey | EAZYBI Returns level member name with specified key value. |

Item | Returns a member from a specified tuple. |

Lag | Returns the member that is a specified number of positions before a specified member along the member's dimension. |

LastChild | Returns the last child of a specified member. |

LastSibling | Returns the last child of the parent of a specified member. |

Lead | Returns the member that is a specified number of positions following a specified member along the member's dimension. |

Members | Returns a member specified by a string expression. |

NextMember | Returns the next member in the level that contains a specified member. |

OpeningPeriod | Returns the first sibling among the descendants of a specified level, optionally at a specified member. |

ParallelPeriod | Returns a member from a prior period in the same relative position as a specified member. |

Parent | Returns the parent of a member. |

PrevMember | Returns the previous member in the level that contains a specified member. |

PreviousPeriods | EAZYBI Returns a set of previous time dimension members for calculation of cumulative sums. |

StrToMember | Returns the member specified by an MDX–formatted string. |

## Numeric Functions

Function | Description |
---|---|

Aggregate | Returns a calculated value using the appropriate aggregate function, based on the context of the query. |

Avg | Returns the average value of a numeric expression evaluated. |

CoalesceEmpty | Coalesces an empty cell value to a number or string and returns the coalesced value. |

Correlation | Returns the correlation coefficient of two series evaluated over a set. |

Count | Returns the number of tuples in a set. |

Covariance | Returns the population covariance of two series evaluated over a set, using the biased population formula. |

CovarianceN | Returns the sample covariance of two series evaluated over a set, using the unbiased population formula. |

DateCompare | EAZYBI Returns -1 if first date is less than second date, 1 if first date is greater than second date, and 0 if dates are equal. |

DateDiffDays | EAZYBI Returns difference in days from first date to second date. |

DateDiffWorkdays | EAZYBI Returns difference in workdays from first date to second date. |

DateDiffHours | EAZYBI Returns difference in hours from first date to second date. |

DateDiffMinutes | EAZYBI Returns difference in minutes from first date to second date. |

FirstQ | Returns the 1st quartile value of a numeric expression evaluated over a set. |

getNumber | |

IIf | Returns one of two values determined by a logical test. |

Len | Returns the number of characters in a string |

LinRegIntercept | Calculates the linear regression of a set and returns the value of b in the regression line y = ax + b. |

LinRegPoint | Calculates the linear regression of a set and returns the value of y in the regression line y = ax + b. |

LinRegR2 | Calculates the linear regression of a set and returns R2 (the coefficient of determination). |

LinRegSlope | Calculates the linear regression of a set and returns the variance associated with the regression line y = ax + b. |

Max | Returns the maximum value of a numeric expression evaluated over a set. |

Median | Returns the median value of a numeric expression evaluated over a set. |

Min | Returns the minimum value of a numeric expression evaluated over a set. |

NonZero | EAZYBI Returns numeric value if non-zero. |

Ordinal | Returns the zero-based ordinal value associated with a level. |

Percentile | Returns the value of the tuple that is at a given percentile of a set. |

Rank | Returns the one-based rank of a specified tuple in a specified set. |

Round | Rounds the values in its first argument to the specified number of decimal places. |

Stddev | Alias for Stdev. |

StddevP | Alias for StdevP. |

Stdev | Returns the sample standard deviation of a numeric expression evaluated over a set, using the unbiased population formula. |

StdevP | Returns the population standard deviation of a numeric expression evaluated over a set, using the biased population formula. |

Sum | Returns the sum of a numeric expression evaluated over a set. |

ThirdQ | Returns the 3rd quartile value of a numeric expression evaluated over a set. |

Val | Returns the numbers contained in a string as a numeric value of appropriate type. |

Value | Returns the value of a measure. |

Var | Returns the sample variance of a numeric expression evaluated over a set, using the unbiased population formula. |

VarP | Returns the population variance of a numeric expression evaluated over a set, using the biased population formula. |

Variance | Alias for Var. |

VarianceP | Alias for VarP. |

## Set Functions

Function | Description |
---|---|

AddCalculatedMembers | Returns a set generated by adding calculated members to a specified set. |

AllMembers | Returns a set that contains all members, including calculated members, of the specified dimension, hierarchy, or level. |

Ascendants | Returns the set of the ascendants of a specified member, including the member itself. |

BottomCount | Returns a specified number of items from the bottom of a set, optionally ordering the set first. |

BottomPercent | Sorts a set and returns the bottom N elements whose cumulative total is at least a specified percentage. |

BottomSum | Sorts a set and returns the bottom N elements whose cumulative total is at least a specified value. |

Cache | Caches the result of the calculation in memory for query in execution. Can be useful when same calculation is repeated during the report more than once. |

CascadingChildrenSet | EAZYBI Returns cascading children set of aggregate calculated member (set argument of Aggregate function). If any children member is also an aggregated calculated member then it is expanded to detailed members as well. |

Children | Returns the children of a specified member. |

ChildrenSet | EAZYBI Returns children set of aggregate calculated member (set argument of Aggregate function). |

Crossjoin | Returns the cross product of two sets. |

Descendants | Returns the set of descendants of a member at a specified level, optionally including or excluding descendants in other levels. |

Distinct | Returns a set, removing duplicate tuples from a specified set. |

DrilldownLevel | Drills down the members of a set, at a specified level, to one level below. Alternatively, drills down on a specified dimension in the set. |

DrilldownLevelBottom | Drills down the bottommost members of a set, at a specified level, to one level below. |

DrilldownLevelTop | Drills down the topmost members of a set, at a specified level, to one level below. |

DrilldownMember | Drills down the members in a set that are present in a second specified set. |

Except | Finds the difference between two sets, optionally retaining duplicates. |

Exists | Returns the the set of tuples of the first set that exist with one or more tuples of the second set. |

Extract | Returns a set of tuples from extracted dimension elements. The opposite of Crossjoin. |

Filter | Returns the set resulting from filtering a set based on a search condition. |

Generate | Applies a set to each member of another set, and then joins the resulting sets by union. Alternatively, this function returns a concatenated string created by evaluating a string expression over a set. |

Head | Returns the first specified number of elements in a set. |

Hierarchize | Orders the members of a set in a hierarchy. |

Intersect | Returns the intersection of two input sets, optionally retaining duplicates. |

LastPeriods | Returns a set of members prior to and including a specified member. |

Members | Returns the set of members in a dimension, level, or hierarchy. |

Mtd | Returns a set of sibling members from the same level as a given member, starting with the first sibling and ending with the given member, as constrained by the Year level in the Time dimension. A shortcut function for the PeriodsToDate function that specifies the level to be Month. |

NonEmptyCrossJoin | Returns the cross product of two sets, excluding empty tuples and tuples without associated fact table data. |

Order | Arranges members of a set, optionally preserving or breaking the hierarchy. |

PeriodsToDate | Returns a set of periods (members) from a specified level starting with the first period and ending with a specified member. |

Qtd | Returns a set of sibling members from the same level as a given member, starting with the first sibling and ending with the given member, as constrained by the Quarter level in the Time dimension. A shortcut function for the PeriodsToDate function that specifies the level to be Quarter. |

Siblings | Returns the siblings of a specified member, including the member itself. |

StrToSet | Returns the set specified by an MDX–formatted string. |

StripCalculatedMembers | Returns a set generated by removing calculated members from a specified set. |

Subset | Returns a subset of tuples from a specified set. |

Tail | Returns a subset from the end of a set. |

ToggleDrillState | Toggles the drill state of members. |

TopCount | Returns a specified number of items from the top of a set, optionally ordering the set first. |

TopPercent | Sorts a set and returns the top N elements whose cumulative total is at least a specified percentage. |

TopSum | Sorts a set and returns the top N elements whose cumulative total is at least a specified value. |

Union | Returns the union of two sets, optionally retaining duplicates. |

Unorder | Removes any enforced ordering from a specified set. |

VisibleRowsSet | EAZYBI Returns the set of all members which are visible on rows where each member is representing one row. |

VisualTotals | Dynamically totals child members specified in a set using a pattern for the total label in the result set. |

Wtd | Returns a set of sibling members from the same level as a given member, starting with the first sibling and ending with the given member, as constrained by the Week level in the Time dimension. A shortcut function for the PeriodsToDate function that specifies the level to be Week. |

Ytd | Returns a set of sibling members from the same level as a given member, starting with the first sibling and ending with the given member, as constrained by the Year level in the Time dimension. A shortcut function for the PeriodsToDate function that specifies the level to be Year. |

## String Functions

Function | Description |
---|---|

AllProperties | EAZYBI Returns all property names and values for a member. |

CoalesceEmpty | Coalesces an empty cell value to a number or string and returns the coalesced value. |

ExtractString | EAZYBI Extracts string fragment using regular expression. |

Format | Formats a number or date to a string. |

Generate | Applies a set to each member of another set, and then joins the resulting sets by union. Alternatively, this function returns a concatenated string created by evaluating a string expression over a set. |

get | EAZYBI Returns the member property value or empty result if the property does not exist. |

getProperty | EAZYBI Alias for get. |

getString | |

getMemberByKey | EAZYBI Returns level member name with specified key value. |

IIF | Returns one of two values determined by a logical test. |

LCase | Returns a string that has been converted to lowercase. |

LTrim | Returns a string containing a copy of a specified string without leading spaces. |

Left | Returns a specified number of characters from the left side of a string. |

Mid | Returns a specified number of characters from a string. |

Name | Returns the name of a dimension, hierarchy, level, or member. |

NonEmptyString | EAZYBI Returns the string if it is not empty (contains at least one character), otherwise returns an empty result. |

Properties | Returns a string (or number or date type) that contains a member property value. It is recommended to use eazyBI specific |

RTrim | Returns a string containing a copy of a specified string without trailing spaces. |

Replace | Returns a string in which a specified substring has been replaced with another substring a specified number of times. |

Right | Returns a string containing a specified number of characters from the right side of a string. |

SetToStr | Returns an MDX-formatted string of that corresponds to a specified set. |

Str | Returns a string representation of a number. |

Titleize | EAZYBI Returns titleized string. |

Trim | Returns a string containing a copy of a specified string without leading and trailing spaces. |

TupleToStr | Returns an MDX–formatted string that corresponds to specified tuple. |

UCase | Returns a string that has been converted to uppercase. |

UniqueName | Returns the unique name of a specified dimension, hierarchy, level, or member. |

## Tuple Functions

Function | Description |
---|---|

Current | Returns the current tuple from a set during iteration. |

DefaultContext | EAZYBI Returns current tuple result assuming Default level for all other dimensions that are not specified in tuple. |

Item | Returns a tuple from a set. |

StrToTuple | Returns the tuple specified by an MDX–formatted string. |