/tags/expression/ Recent content in expression on Stroom Hugo -- gohugo.io Tue, 27 Jul 2021 00:00:00 +0000 /docs/reference-section/expressions/ Tue, 27 Jul 2021 00:00:00 +0000 /docs/reference-section/expressions/ <p>Expressions can be used to manipulate data on Stroom Dashboards and Queries.</p> <p>Each function has a name, and some have additional aliases.</p> <p>In some cases, functions can be nested. The return value for some functions being used as the arguments for other functions.</p> <p>The arguments to functions can either be other functions, literal values, or they can refer to fields on the input data using the field reference <code>${val}</code> syntax.</p> <div class="td-card-deck card-deck mb-4"> <div class="td-card card mb-4"> <div class="card-header"> Aggregate Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="aggregate#average">Average</a></li> <li><a href="aggregate#count">Count</a></li> <li><a href="aggregate#count-groups">Count Groups</a></li> <li><a href="aggregate#count-unique">Count Unique</a></li> <li><a href="aggregate#distinct">Distinct</a></li> <li><a href="aggregate#joining">Joining</a></li> <li><a href="aggregate#max">Max</a></li> <li><a href="aggregate#min">Min</a></li> <li><a href="aggregate#standard-deviation">Standard Deviation</a></li> <li><a href="aggregate#sum">Sum</a></li> <li><a href="aggregate#variance">Variance</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> String Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="string#concat">Concat</a></li> <li><a href="string#current-user">Current User</a></li> <li><a href="string#decode">Decode</a></li> <li><a href="string#decodeurl">DecodeUrl</a></li> <li><a href="string#encodeurl">EncodeUrl</a></li> <li><a href="string#exclude">Exclude</a></li> <li><a href="string#hash">Hash</a></li> <li><a href="string#include">Include</a></li> <li><a href="string#index-of">Index Of</a></li> <li><a href="string#last-index-of">Last Index Of</a></li> <li><a href="string#lower-case">Lower Case</a></li> <li><a href="string#match">Match</a></li> <li><a href="string#query-param">Query Param</a></li> <li><a href="string#query-params">Query Params</a></li> <li><a href="string#replace">Replace</a></li> <li><a href="string#string-length">String Length</a></li> <li><a href="string#substring">Substring</a></li> <li><a href="string#substring-after">Substring After</a></li> <li><a href="string#substring-before">Substring Before</a></li> <li><a href="string#upper-case">Upper Case</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Mathematics Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="mathematics#add">Add</a></li> <li><a href="mathematics#average">Average</a></li> <li><a href="mathematics#divide">Divide</a></li> <li><a href="mathematics#max">Max</a></li> <li><a href="mathematics#min">Min</a></li> <li><a href="mathematics#modulo">Modulo</a></li> <li><a href="mathematics#multiply">Multiply</a></li> <li><a href="mathematics#negate">Negate</a></li> <li><a href="mathematics#power">Power</a></li> <li><a href="mathematics#random">Random</a></li> <li><a href="mathematics#subtract">Subtract</a></li> <li><a href="mathematics#sum">Sum</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Type Checking Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="type-checking#is-boolean">Is Boolean</a></li> <li><a href="type-checking#is-double">Is Double</a></li> <li><a href="type-checking#is-error">Is Error</a></li> <li><a href="type-checking#is-integer">Is Integer</a></li> <li><a href="type-checking#is-long">Is Long</a></li> <li><a href="type-checking#is-null">Is Null</a></li> <li><a href="type-checking#is-number">Is Number</a></li> <li><a href="type-checking#is-string">Is String</a></li> <li><a href="type-checking#is-value">Is Value</a></li> <li><a href="type-checking#type-of">Type Of</a></li> </ul> </p> </div> </div> </div> <div class="td-card-deck card-deck mb-4"> <div class="td-card card mb-4"> <div class="card-header"> Link Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="link#annotation">Annotation</a></li> <li><a href="link#dashboard">Dashboard</a></li> <li><a href="link#data">Data</a></li> <li><a href="link#link">Link</a></li> <li><a href="link#stepping">Stepping</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Cast Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="cast#to-boolean">To Boolean</a></li> <li><a href="cast#to-double">To Double</a></li> <li><a href="cast#to-integer">To Integer</a></li> <li><a href="cast#to-long">To Long</a></li> <li><a href="cast#to-string">To String</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Date Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="date#format-date">Format Date</a></li> <li><a href="date#parse-date">Parse Date</a></li> <li><a href="date#ceiling-yearmonthdayhourminutesecond">Ceiling Functions</a></li> <li><a href="date#floor-yearmonthdayhourminutesecond">Floor Functions</a></li> <li><a href="date#round-yearmonthdayhourminutesecond">Round Functions</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Logic Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="logic#equals">Equals</a></li> <li><a href="logic#greater-than">Greater Than</a></li> <li><a href="logic#greater-than-or-equal-to">Greater Than or Equal To</a></li> <li><a href="logic#if">If</a></li> <li><a href="logic#less-than">Less Than</a></li> <li><a href="logic#less-than-or-equal-to">Less Than or Equal To</a></li> <li><a href="logic#not">Not</a></li> <li><a href="logic#case">Case</a></li> </ul> </p> </div> </div> </div> <div class="td-card-deck card-deck mb-4"> <div class="td-card card mb-4"> <div class="card-header"> Rounding Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="rounding#ceiling">Ceiling</a></li> <li><a href="rounding#floor">Floor</a></li> <li><a href="rounding#round">Round</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Selection Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="selection#any">Any</a></li> <li><a href="selection#bottom">Bottom</a></li> <li><a href="selection#first">First</a></li> <li><a href="selection#last">Last</a></li> <li><a href="selection#nth">Nth</a></li> <li><a href="selection#top">Top</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> URI Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="uri#extractauthorityfromuri">extractAuthorityFromUri</a></li> <li><a href="uri#extractfragmentfromuri">extractFragmentFromUri</a></li> <li><a href="uri#extracthostfromuri">extractHostFromUri</a></li> <li><a href="uri#extractpathfromuri">extractPathFromUri</a></li> <li><a href="uri#extractportfromuri">extractPortFromUri</a></li> <li><a href="uri#extractqueryfromuri">extractQueryFromUri</a></li> <li><a href="uri#extractschemefromuri">extractSchemeFromUri</a></li> <li><a href="uri#extractschemespecificpartfromuri">extractSchemeSpecificPartFromUri</a></li> <li><a href="uri#extractuserinfofromuri">extractUserInfoFromUri</a></li> </ul> </p> </div> </div> <div class="td-card card mb-4"> <div class="card-header"> Value Functions </div> <div class="card-body"> <p class="card-text"> <ul> <li><a href="value#err">Err</a></li> <li><a href="value#false">False</a></li> <li><a href="value#null">Null</a></li> <li><a href="value#true">True</a></li> </ul> </p> </div> </div> </div>