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TypeRead/writeAuthorAvailability
Data providerWriteFinbourneProvided with LUSID

Providing you have sufficient access control permissions, the Lusid.Portfolio.Writer provider enables you to write a Luminesce SQL query that either creates, updates or deletes one or more LUSID portfolios.

Note: By default, Lusid.Portfolio.Writer cannot add properties to portfolios. To do this, you must first configure Lusid.Portfolio.Writer to 'inline' properties. See how to do this.

You must construct a valid table of data to write, one portfolio per record. Lusid.Portfolio.Writer lists the fields (columns) available to populate with values for each record, and has a set of parameters to help you construct a valid table.

Your query can use the WriteAction field to perform one of the following operations:

  • Upsert a portfolio; that is, create a portfolio if it does not exist, and update it if it does. This is the default operation if you omit WriteAction. You must specify the PortfolioType field to declare either a transaction, derived transaction or reference portfolio.
  • Insert (create) a portfolio. This operation fails if the portfolio already exists.
  • Update a portfolio. Note it is only possible to change the DisplayName and Description fields, or add or change properties. This operation fails if the portfolio does not already exist.
  • Delete a portfolio.

See also: Lusid.Portfolio

Basic usage

@table_of_data = <select-statement>;
select * from Lusid.Portfolio.Writer where toWrite = @table_of_data;

Query parameters

Lusid.Portfolio.Writer has parameters that help you construct a valid table of data to write.

Note: The toWrite parameter is mandatory and used to actually write the table of data into LUSID.

To list available parameters, their data types, default values, and an explanation for each, run the following query using a suitable tool:

select FieldName, DataType, ParamDefaultValue, Description from Sys.Field where TableName = 'Lusid.Portfolio.Writer' and FieldType = 'Parameter';

Data fields

Lusid.Portfolio.Writer lists the fields you can populate in your table of data to write.

Depending on the operation you want to perform and the type of portfolio, the following fields are mandatory to include in the table of data:

OperationMandatory fields in table of data to write for all portfoliosMandatory fields for transaction portfoliosMandatory fields for derived transaction portfoliosMandatory fields for reference portfolios
Upsert, InsertPortfolioScope
PortfolioCode
DisplayName
Created
'Insert' as WriteAction (for insert operations)		'Transaction' as PortfolioType
BaseCurrency
SubHoldingKeys (can be empty string)		'DerivedTransaction' as PortfolioType
SubHoldingKeys (can be empty string)		'Reference' as PortfolioType
UpdatePortfolioScope
PortfolioCode
'Update' as WriteAction		'Transaction' as PortfolioType'DerivedTransaction' as PortfolioType'Reference' as PortfolioType
DeletePortfolioScope
PortfolioCode
'Delete' as WriteAction		'Transaction' as PortfolioType'DerivedTransaction' as PortfolioType'Reference' as PortfolioType

To list all available fields, their data types, whether fields are considered 'main', and an explanation for each, run the following query using a suitable tool:

select FieldName, DataType, IsMain, IsPrimaryKey, SampleValues, Description from Sys.Field where TableName = 'Lusid.Portfolio.Writer' and FieldType = 'Column';

Write errors

We recommend examining the results of every write query using one or more of the WriteError, WriteErrorCode and WriteErrorDetail fields.

For each record in the table of data to write, Lusid.Portfolio.Writer returns an error code. If the operation is successful, the error code is 0. If unsuccessful, a positive error code and explanation help you discover why LUSID considers the operation invalid.  

For example, the query:

@table_of_data = select 'Finbourne-Examples' as PortfolioScope, 'UK-Benchmark' as PortfolioCode, 'UK Benchmark Index' as DisplayName, #2020-01-01# as Created;
select WriteErrorCode, WriteError, WriteErrorDetail from Lusid.Portfolio.Writer where toWrite = @table_of_data;


...fails because a PortfolioType is not specified.

Examples

Note: For more example Luminesce SQL queries, visit our Github repo.

Example 1: Create a transaction portfolio

If you omit the WriteAction field, an upsert operation is performed.

@table_of_data = select 'Transaction' as PortfolioType, 'Finbourne-Examples' as PortfolioScope, 'FR-Equities' as PortfolioCode,
'French Equities' as DisplayName, 'Portfolio containing French equities' as Description, #2020-01-01# as Created, 'EUR' as BaseCurrency, '' as SubHoldingKeys;
select * from Lusid.Portfolio.Writer where ToWrite = @table_of_data;

Example 2: Create a derived transaction portfolio with a sub-holding key

@table_of_data = select 'DerivedTransaction' as PortfolioType, 'Finbourne-Examples' as PortfolioScope, 'Derived-UK-Equities' as PortfolioCode,
'Finbourne-Examples' as ParentPortfolioScope, 'UK-Equities' as ParentPortfolioCode, 'Derived UK Equities' as DisplayName,
'Derived portfolio containing UK equities' as Description, #2020-01-01# as Created, 'Transaction/Vendor/Strategy' as SubHoldingKeys;
select * from Lusid.Portfolio.Writer where ToWrite = @table_of_data;

Example 3: Create a reference portfolio with particular instrument scopes

@table_of_data = select 'Reference' as PortfolioType, 'Finbourne-Examples' as PortfolioScope, 'UK-Benchmark' as PortfolioCode, 'UK Benchmark' as DisplayName, 
'Benchmark for UK equities' as Description, #2020-01-01# as Created, 'reference-instruments-1,reference-instruments-2' as InstrumentScopes;
select * from Lusid.Portfolio.Writer where ToWrite = @table_of_data;

Example 4: Update the name, description and a property on a transaction portfolio

Note that to update properties for portfolios, Lusid.Portfolio.Writer must have been configured to 'inline' the chosen properties (in this case PortfolioManager) into the standard set of portfolio fields.

@table_of_data = select 'Transaction' as PortfolioType, 'Finbourne-Examples' as PortfolioScope, 'FR-Equities' as PortfolioCode,
'Equities from France' as DisplayName, 'Portfolio containing equities from France' as Description, 'Rene Duclerc' as PortfolioManager, 'Update' as WriteAction;
select * from Lusid.Portfolio.Writer where ToWrite = @table_of_data;

Example 5: Delete a transaction portfolio

@table_of_data = select 'Transaction' as PortfolioType, 'Finbourne-Examples' as PortfolioScope, 'FR-Equities' as PortfolioCode, 'Delete' as WriteAction;
select * from Lusid.Portfolio.Writer where ToWrite = @table_of_data;
Keywords: luminesce, provider, portfolio