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feat(connectors): generalize readiness and constraint handling (#212)

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* feat(connectors): add postgres maxConnections

* feat(connectors): add mysql maxConnections

* feat(connectors): add sqlserver maxConnections

* feat(connectors): rename snowflake pool config

* docs: document connector maxConnections

* feat(scan): add constraint discovery warning helper

* feat(scan): carry structural warnings through reports

* feat(postgres): soft-fail denied constraint discovery

* feat(mysql): soft-fail denied constraint discovery

* feat(sqlserver): soft-fail denied constraint discovery

* feat(bigquery): soft-fail denied primary key discovery

* feat(snowflake): report denied primary key discovery

* test(scan): verify constraint discovery warnings

* feat(historic-sql): use shared readiness probes

* docs: document query history readiness probes

* test(historic-sql): verify readiness probe registry

* test(ingest): account for live database warnings artifact

* Add skip option for agent setup
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Andrey Avtomonov 2026-05-24 19:30:06 +02:00 • committed by GitHub
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docs-site/content/docs/configuration/ktx-yaml.mdx
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@ -157,11 +157,14 @@ connections:
dataset_ids: [analytics, mart]
```
For Snowflake connections, set `maxSessions` when deep ingest needs more or
fewer concurrent warehouse sessions. The default is `4`. This caps all
concurrent Snowflake SQL work for that connector instance, including schema
introspection, table sampling, relationship profiling, relationship
validation, and read-only SQL execution.
For Postgres, MySQL, SQL Server, and Snowflake connections, set
`maxConnections` when scan or ingest work needs to stay below the target's
connection cap. Postgres, MySQL, and SQL Server default to `10`; Snowflake
defaults to `4`. This caps all concurrent SQL work for that connector instance,
including schema introspection, table sampling, relationship profiling,
relationship validation, and read-only SQL execution. BigQuery and ClickHouse
do not expose `maxConnections` because their connectors don't use client-side
connection pools.
For Postgres, BigQuery, and Snowflake, `historicSql` and `context.queryHistory`
toggle query-history ingest. The shape is connector-specific; the setup wizard
@ -517,7 +520,7 @@ the manifest.
| `relationships.maxLlmTablesPerBatch` | `int > 0` | `40` | Max tables included in a single LLM relationship-proposal batch. |
| `relationships.maxCandidatesPerColumn` | `int > 0` | `25` | Max join partners considered per column. |
| `relationships.profileSampleRows` | `int > 0` | `10000` | Rows sampled per table when profiling values for relationship inference. |
| `relationships.profileConcurrency` | `int > 0` | `4` | Parallel relationship-profile queries against the database. For Snowflake, effective database concurrency is also bounded by the connection's `maxSessions`. |
| `relationships.profileConcurrency` | `int > 0` | `4` | Parallel relationship-profile queries against the database. For pooled connectors, effective database concurrency is also bounded by the connection's `maxConnections`. |
| `relationships.validationConcurrency` | `int > 0` | `4` | Parallel relationship validation queries against the database. |
| `relationships.validationBudget` | `all` \| `int ≥ 0` | runtime default | Cap on validation queries per scan. `all` means unlimited. |