ArxCapability enum · PostgreSQL in C#

Definition

Namespace: ARX.SDK.Services
Package: ARX.SDK

public enum ArxCapability

The features that differ between providers. A provider declares the ones it supports, so code can choose a path before it calls. The flags never replace the rule: a provider refuses an unsupported part of a call with ArxNotSupportedException (ARX8001) naming it, and never ignores it.

Values

None= 0: No feature.
Joins= 1 << 0: Linked entities in a query (ArxLinkEntity): SQL joins, MongoDB $lookup.
Aggregates= 1 << 1: Aggregates and grouping in a query (AggregateInfo).
OffsetPaging= 1 << 2: Paging by page number (PageInfo.PageNumber beyond 1).
TokenPaging= 1 << 3: Paging by an opaque cookie from the previous page (PageInfo.PagingCookie).
TotalCount= 1 << 4: The total of matching rows (PageInfo.ReturnTotalRecordCount).
Transactions= 1 << 5: ARX transactions and batch scopes across several calls.
BulkWrite= 1 << 6: CreateMultiple, UpdateMultiple and DeleteMultiple.
Upsert= 1 << 7: Reserved for an insert-or-update operation. ARX has none yet, so no provider declares it.
StoredProcedures= 1 << 8: Execute: stored procedures and functions (ArxProcedureExpression).
FullTextSearch= 1 << 9: Full-text search conditions (ArxFullTextSearch).
LikeOperators= 1 << 10: Pattern conditions: Like, BeginsWith, EndsWith, Contains (and their negations).
OrFilters= 1 << 11: Filters joined by Or (ArxFilterExpression with the Or operator).
SecondaryIndexQuery= 1 << 12: A read that names a secondary index (DynamoDB GSIs). Relational databases choose indexes themselves and don't declare it.
OptimisticConcurrency= 1 << 13: Optimistic concurrency: a table's version column (ArxSchemaCatalogBuilder.Version) kept and checked on writes (ARX2004).
SchemaResolution= 1 << 14: Without a schema catalog, the service reads each table's id column, keys and column types from the database when a call needs them. Without this capability, a service with no catalog refuses an undeclared table (ARX1016).
Savepoints= 1 << 15: A batch scope can undo one failed call alone, through a savepoint (Savepoints). Without it the default batch scope has no savepoints, and asking for them is ARX8001.
WriteByFilter= 1 << 16: Update and delete by a filter: UpdateMultipleAsync(values, filter) and DeleteMultipleAsync(table, filter) change the rows a filter of the table's own columns matches. DynamoDB declares it with a rule: the filter must give the partition key (else ARX8001), and at most 100 items change.

Usage

A line from a verified sample; the full, runnable code is on its page.

Show($"ready: {check.IsReady}; transactions here: {check.Supports(ArxCapability.Transactions)}; limits: {check.Limits.Count}");

Set the service up for production, scenario 2

Used in:

Set the service up for productionCreate