Boxlang 1.x Stable Released
BoxLang : A Modern Dynamic JVM Language
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This function returns true if the key exists in the query

Method Signature

Arguments

Argument
Type
Required
Description
Default

Examples

Check to see if column exists in Query

Uses the member function syntax

Result: true

Additional Examples

Related

myQuery = queryNew( "custID,custName" );
writeDump( queryKeyExists( myQuery, "age" ) );
writeDump( queryKeyExists( myQuery, "custName" ) );
  1. BoxLang Language
  2. Reference
  3. Built-in Functions
  4. query

QueryKeyExists

PreviousQueryInsertAtNextQueryMap
QueryKeyExists(query=[query], key=[string])

query

query

true

The query to check for the key

key

string

true

The key to check for

news = queryNew( "id,title", "integer,varchar", [ 
	{
		"id" : 1,
		"title" : "Dewey defeats Truman"
	},
	{
		"id" : 2,
		"title" : "Man walks on Moon"
	}
] );
writeOutput( news.keyExists( "title" ) );
Run Example
Run Example
QueryRecordCount
QueryColumnList
QueryRowSwap
QuerySort
QueryEach
QueryColumnCount
QueryReduce
QueryCurrentRow
QueryColumnData
QueryRowData
QueryFilter
QueryAddRow
QueryNew
QueryReverse
QueryPrepend
QueryColumnExists
QueryAddColumn
QueryGetCell
QueryGetResult
QueryMap
QueryEvery
QueryRecordCount
QuerySome
QueryDeleteColumn
QuerySetCell
QueryInsertAt
QueryClear
QuerySetRow
QueryColumnArray
QueryDeleteRow
QueryAppend
QuerySlice
QueryRegisterFunction
  • Method Signature
  • Arguments
  • Examples
  • Check to see if column exists in Query
  • Additional Examples
  • Related