Apex Reference Guide

Apex Reference Guide
Release Notes
Apex DML Operations
ApexPages Namespace
AppLauncher Namespace
Approval Namespace
Auth Namespace
Cache Namespace
Canvas Namespace
ChatterAnswers Namespace
CommerceBuyGrp Namespace
CommerceExtension Namespace
CommerceOrders Namespace
CommercePayments Namespace
CommerceTax Namespace
commonserviceexcellence Namespace
ComplianceMgmt Namespace
Compression Namespace
ConnectApi Namespace
Context Namespace
Database Namespace
Datacloud Namespace
DataRetrieval Namespace
DataSource Namespace
DataWeave Namespace
Dom Namespace
embeddedai Namespace
EventBus Namespace
ExternalService Namespace
Flow Namespace
Flowtesting Namespace
flowuiruntime Namespace
FormulaEval Namespace
disputemanagement Namespace
fsccashflow Namespace
fsccomplaintmanagement Namespace
fschousehold Namespace
fscserviceprocesses Namespace
fscwmgen Namespace
industriespersonalizedfinance Namespace
Functions Namespace
ise_bots_apex Namespace
IssueCreditMemo Namespace
ind_mfg_sample_mgmt_apex Namespace
industriesNlpSvc
IndustriesDigitalLending Namespace
Invocable Namespace
InvoiceWriteOff Namespace
IsvPartners Namespace
KbManagement Namespace
LxScheduler Namespace
Messaging Namespace
Metadata Namespace
PlaceQuote Namespace
Pref_center Namespace
Process Namespace
QuickAction Namespace
renew_assets_summary Namespace
Reports Namespace
RevSignaling Namespace
RevSalesTrxn Namespace
RichMessaging Namespace
RulesAppln Namespace
runtime_industries_cpq Namespace
runtime_industries_insurance Namespace
Schema Namespace
Search Namespace
setup_flow_performance Namespace
Sfc Namespace
Sfdc_Checkout Namespace
Sfdc_Enablement Namespace
sfdc_surveys Namespace
sfdw Namespace
sfsqlquery Namespace
Site Namespace
Slack Namespace
Support Namespace
System Namespace
TerritoryMgmt Namespace
TxnSecurity Namespace
UserProvisioning Namespace
VisualEditor Namespace
Wave Namespace
QueryBuilder Class
QueryNode Class
QueryNode Methods
ProjectionNode Class
Templates Class
TemplatesSearchOptions Class
Appendices
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

QueryNode Class

Define each node of the query - such as projection, groups, order, filters. Execute the query.

Namespace

wave

Usage

Refer to the QueryBuilder example.

QueryNode Methods

The following are methods for QueryNode.

build(streamName)

Build the query string represented by this QueryNode and assign it to a stream name.

Signature

public String build(String streamName)

Parameters

  • streamName:

    Type: String

    The identifier for the stream - for example, “q”.

Return Value

Type: String

The SAQL query string represented by the QueryNode.

foreach(projections)

Applies a set of expressions to every row in a dataset. This action is often referred to as projection.

Signature

public wave.QueryNode foreach(List<wave.ProjectionNode> projections)

Parameters

  • projections:

    Type: List<wave.ProjectionNode>

    A list of ProjectionNodes to be added to this QueryNode.

Return Value

Type: wave.QueryNode

group(groups)

Groups matched records (group by specific dataset attributes).

Signature

public wave.QueryNode group(List<String> groups)

Parameters

  • groups:

    Type: List<String>

    A list of expressions.

Return Value

Type: wave.QueryNode

Example

1Wave.ProjectionNode[] projs = new Wave.ProjectionNode[]{Wave.QueryBuilder.get('Name'), Wave.QueryBuilder.get('Revenue').sum().alias('REVENUE_SUM')};
2ConnectApi.LiteralJson result = Wave.QueryBuilder.load('datasetId', 'datasetVersionId').group(new String[]{'Name'}).foreach(projs).build('q');

group()

Groups matched records (group by all).

Signature

public wave.QueryNode group()

Return Value

Type: wave.QueryNode

Example

1String query = Wave.QueryBuilder.load('datasetId', 'datasetVersionId').group().foreach(projs).build('q');

order(orders)

Sorts in ascending or descending order on one or more fields.

Signature

public wave.QueryNode order(List<List<String>> orders)

Parameters

  • orders: Type: List<List<String>> A list of column names and associated ascending or descending keywords, for example 
    1List<List<String>>{new List<String>{'Name', 'asc'}, new List<String>{'Revenue', 'desc'}}

Return Value

Type: wave.QueryNode

cap(cap)

Limits the number of results that are returned.

Signature

global Wave.QueryNode cap(Integer cap)

Parameters

  • cap:

    Type: Integer

    The maximum number of rows to return.

Return Value

Type: wave.QueryNode

filter(filterCondition)

Selects rows from a dataset based on a filter condition (a predicate).

Signature

public wave.QueryNode filter(String filterCondition)

Parameters

  • filterCondition:

    Type: String

    For example: filter('Name != \'My Name\'')

Return Value

Type: wave.QueryNode

filter(filterConditions)

Selects rows from a dataset based on multiple filter conditions (predicates).

Signature

public wave.QueryNode filter(List<String> filterCondition)

Parameters

  • filterCondition:

    Type: List<String>

    A list of filter conditions.

Return Value

Type: wave.QueryNode

execute(streamName)

Execute the query and return rows as JSON.

Signature

global ConnectApi.LiteralJson execute(String streamName)

Parameters

  • streamName:

    Type: String

    The query stream to execute. For example:
    1ConnectApi.LiteralJson result = Wave.QueryBuilder.load('datasetId',
2      'datasetVersionId').group().foreach(projs).execute('q');

Return Value

Type: ConnectApi.LiteralJson