dt-migration

Smartscape Migration Skill

This skill migrates Dynatrace classic and Gen2 entity-based DQL queries and query patterns to Smartscape-based equivalents.

Load the dt-dql-essentials skill before writing final DQL so the translated query also follows current DQL syntax rules.

This skill focuses on Smartscape-oriented DQL migration only. It does not cover asset-level migration workflows.

Query Purpose Classification

Start here. The correct migration strategy depends on what the query is actually trying to do — not just which classic constructs it uses.

There are three distinct situations:

#	Situation	Classic anti-pattern	Migration strategy
1	Mass data query filtered by entity conditions	classicEntitySelector(...) inline in filter: of a timeseries, logs, or metrics query	Resolve entity conditions to raw data dimensions first. Smartscape is a fallback, not the default.
2	Mass data query using entity subquery for filtering	fetch dt.entity.* inside in [...], lookup [...], or join [...] to filter the outer mass data query	Same dimension-first strategy. Rewrite as raw dimension filter or in [smartscapeNodes ...] subquery.
3	Pure entity list query	fetch dt.entity.* used standalone or as the primary result source	smartscapeNodes is the only valid path. No raw dimension alternative exists.

Decision:

• Situations 1 or 2 — load references/mass-data-filtering-strategy.md and complete all steps including field discovery (Step 2) and equivalence verification (Step 4). Do not skip the fieldsSnapshot gates — they determine which approach is viable. Only fall back to the Migration Workflow below when the entity-type mapping or relationship traversal is needed to complete a Smartscape subquery.
• Situation 3 — continue with the Migration Workflow and entity mapping table below.

Note: Situation 3 has a sub-case where classicEntitySelector is used to filter the entities returned by fetch dt.entity.*. This is rare and follows the same smartscapeNodes path — resolve the selector conditions using references/mass-data-filtering-strategy.md Step 1B, then apply them as node filters in smartscapeNodes.

Migration Workflow

Follow this order for Situation 3 (pure entity list queries) and for constructing Smartscape subqueries in Situations 1 and 2:

1. Identify the classic input pattern:
   • fetch dt.entity.*
   • classicEntitySelector(...)
   • relationship field access such as belongs_to[...], runs[...], instance_of[...]
   • signal or event queries using dt.entity.*
2. Identify the involved classic entity types.
3. Look up the Smartscape replacement in the core entity mapping table below.
4. Check which classic DQL constructs need explicit migration.
5. Rewrite the query using Smartscape primitives:
   • smartscapeNodes
   • smartscapeEdges
   • traverse
   • references
   • getNodeName()
   • getNodeField()
6. Check for special cases, unsupported entities, or ID assumptions.
7. Load the matching detailed references for the specific entity family or migration pattern.

For the full migration process and output expectations, load references/migration-workflow.md.

Core Entity Mapping Table

Use this compact table first for common migrations. For the full mapping set, load references/type-mappings.md.

Classic / Gen2 entity	Smartscape field	Smartscape node type	Notes
dt.entity.host	dt.smartscape.host	HOST	Standard host mapping
dt.entity.service	dt.smartscape.service	SERVICE	Standard service mapping
dt.entity.process_group_instance	dt.smartscape.process	PROCESS	Process instance maps directly
dt.entity.container_group_instance	dt.smartscape.container	CONTAINER	Container-group instance maps directly
dt.entity.kubernetes_cluster	dt.smartscape.k8s_cluster	K8S_CLUSTER	Kubernetes cluster
dt.entity.kubernetes_node	dt.smartscape.k8s_node	K8S_NODE	Kubernetes node
dt.entity.kubernetes_service	dt.smartscape.k8s_service	K8S_SERVICE	Kubernetes service
dt.entity.cloud_application	multiple workload fields	multiple K8S workload node types	Maps to multiple workload types; load the cloud-application guide
dt.entity.cloud_application_instance	dt.smartscape.k8s_pod	K8S_POD	Classic cloud app instance becomes pod
dt.entity.cloud_application_namespace	dt.smartscape.k8s_namespace	K8S_NAMESPACE	Namespace mapping
dt.entity.application	dt.smartscape.frontend	FRONTEND	Frontend application mapping
dt.entity.aws_lambda_function	dt.smartscape.aws.lambda_function	AWS_LAMBDA_FUNCTION	Cloud-function entity mapping

DQL Constructs to Inspect During Migration

These classic constructs usually need explicit rewriting:

Classic construct	Typical Smartscape replacement	Notes
entityName(x)	name or getNodeName(x)	Prefer name when querying nodes directly
entityAttr(x, "...")	direct node field or getNodeField(x, "...")	Prefer direct fields when available
classicEntitySelector(...)	node filters plus traverse	Start from the constrained side; for mass data queries see mass-data-filtering-strategy.md first
dt.entity.* in signal queries	dt.smartscape.*	Applies to by, filter, fieldsAdd, expand, and related clauses
belongs_to[...], runs[...], instance_of[...]	traverse or references[...]	references works only for static edges
classic entity ID filters	Smartscape id	Do not reuse classic IDs blindly
affected_entity_ids and affected_entity_types	smartscape.affected_entity.ids and smartscape.affected_entity.types	Use Smartscape event fields

For the detailed function-by-function guide, load references/dql-function-migration.md.

Special Cases

Do not translate these patterns literally:

• Host group — no standalone Smartscape entity; use fields on HOST
• Process group — no standalone Smartscape entity; use fields on PROCESS
• Container group — no standalone Smartscape entity; preserve output shape with placeholders if needed
• Classic IDs — classic entity IDs do not carry over to Smartscape automatically
• Planned, missing, or not-planned mappings — check the full mapping table before assuming direct support

Load references/special-cases.md before migrating these patterns.

Entity-Focused Guides

When a migration centers on a specific entity family, load the matching detailed guide:

• references/entity-host.md
• references/entity-service.md
• references/entity-process.md
• references/entity-container.md
• references/entity-kubernetes.md
• references/entity-cloud-application.md

Each guide explains:

• what the classic entity represented
• what the Smartscape replacement is
• which fields usually change
• how relationships are migrated
• common examples and pitfalls

References

• references/README.md — Reference index and reading guide
• references/mass-data-filtering-strategy.md — Start here for Situations 1 and 2. Mandatory steps: resolve conditions, run fieldsSnapshot discovery, select approach, write query, verify equivalence
• references/auto-tagging-field-mapping.md — Maps auto-tagging rule condition keys to semantic dictionary fields (mass data and Smartscape node attributes)
• references/entity-selector-predicates.md — Full predicate vocabulary for classicEntitySelector expressions
• references/migration-workflow.md — End-to-end migration process and output expectations
• references/type-mappings.md — Full classic-to-Smartscape type and field mappings
• references/dql-function-migration.md — How to migrate classic DQL functions and patterns
• references/relationship-mappings.md — Valid Smartscape edges and traversal guidance
• references/special-cases.md — Non-literal and unsupported entity migrations
• references/quick-reference.md — Compact rules and gotchas
• references/examples.md — Before/after migration examples