Support ClickHouse data skipping indexes in @storage(clickhouse: {skippingIndexes})

[moose-code]

Implements proposal 1 (data skipping indices) from #1524.

What

Adds a skippingIndexes option to the per-entity ClickHouse table options, next to partitionBy/orderBy/ttl:

type Transfer @storage(
  clickhouse: {
    partitionBy: "toYYYYMM(timestamp)"
    orderBy: ["chainId", "timestamp"]
    skippingIndexes: [
      { name: "idx_from", expr: "fromAddress", type: "bloom_filter(0.01)", granularity: 4 },
      { name: "idx_to",   expr: "toAddress",   type: "bloom_filter(0.01)" }
    ]
  }
) { ... }

emitted into the history table DDL inside the column list:

CREATE TABLE IF NOT EXISTS db.`envio_history_Transfer` (
  ...,
  `envio_change` Enum8('SET', 'DELETE'),
  INDEX `idx_from` `from_address` TYPE bloom_filter(0.01) GRANULARITY 4,
  INDEX `idx_to` `to_address` TYPE bloom_filter(0.01)
)
ENGINE = ...

Design points requested in the issue, all baked in:

• expr goes through resolveExpressionColumns — the same rewriting partitionBy/ttl use, so schema field names work and get column renames (column_name_format: snake_case) and linked-entity _id suffixes resolved.
• type is a verbatim passthrough string — bloom_filter(0.01), set(100), minmax, ngrambf_v1(...) all work; nothing is hardcoded so the type can't be wrong for a given column.
• granularity is optional — omitted leaves ClickHouse's default of 1.

Validation at codegen: name/expr/type required non-empty strings, name restricted to identifier characters (it's backtick-quoted in the DDL), granularity a positive integer, unknown entry fields and duplicate index names rejected.

Changing skippingIndexes on a deployed indexer is flagged by the existing persisted-config diff (same behavior as partitionBy), since the DDL only applies on table creation.

Flow

entity_parsing.rs (directive parse + validation) → public_config.rs (internal config JSON) → Config.res (runtime parse) → ClickHouse.res makeCreateHistoryTableQuery (DDL).

Tests

• User API (ClickHouse_test.res): DDL generation with renamed columns and mixed granularity, plus a live round-trip — ClickHouse.initialize against the test ClickHouse server, asserting system.data_skipping_indices reports the declared indexes.
• UserApiValidation_test.res: options resolution across the public config boundary.
• Rust (entity_parsing.rs): parse shapes and all error cases; codegen_templates.rs: internal config JSON mirroring.
• e2e (scenarios/e2e_test + packages/e2e-tests): Transfer now declares from/to bloom-filter skipping indexes (the exact workload from ClickHouse storage: skip indices + projections for per-address retrieval (sequel to #1409/#1433) #1524), asserted against the CI ClickHouse service.

Also validated the emitted DDL manually against ClickHouse 25.8 (clickhouse local), including the combined PARTITION BY + TTL + INDEX form.

Not in scope

Proposals 2–4 from #1524 (projections, lifecycle-managed MVs, append-only view hint) — the issue's OR-across-columns caveat makes projections a separate design discussion.

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Summary by CodeRabbit

• New Features

  • Added support for configuring ClickHouse data-skipping indexes in storage options.
  • Indexes can specify a name, expression, type, and optional granularity.
  • Configured indexes are created on generated ClickHouse history tables, with schema fields resolved to database column names.

• Bug Fixes

  • Added validation for missing or invalid index settings, non-positive granularity, unsafe names, and duplicate index names.

• Tests

  • Added coverage for configuration parsing, SQL generation, serialization, and live ClickHouse index creation.

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📒 Files selected for processing (11)

• packages/cli/src/config_parsing/entity_parsing.rs
• packages/cli/src/config_parsing/public_config.rs
• packages/cli/src/hbs_templating/codegen_templates.rs
• packages/cli/test/schemas/schema-with-clickhouse-options.graphql
• packages/e2e-tests/src/e2e/e2e.test.ts
• packages/envio-tests/test/UserApiValidation_test.res
• packages/envio-tests/test/lib_tests/ClickHouse_test.res
• packages/envio/src/Config.res
• packages/envio/src/Internal.res
• packages/envio/src/bindings/ClickHouse.res
• scenarios/e2e_test/schema.graphql

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📝 Walkthrough

Walkthrough

ClickHouse storage options now support data-skipping indices. The CLI validates and serializes index definitions. Runtime code generates index clauses in history-table DDL. Tests cover parsing, SQL generation, metadata, and live ClickHouse initialization.

Changes

ClickHouse skip-index support

Layer / File(s)	Summary
Index contract and validation packages/cli/src/config_parsing/entity_parsing.rs, packages/cli/src/config_parsing/public_config.rs, packages/envio/src/Config.res, packages/envio/src/Internal.res, packages/envio-tests/test/UserApiValidation_test.res	ClickHouse options now accept index names, expressions, types, and optional granularity. Parsing validates required fields, identifiers, positive granularity, supported keys, and duplicate names. Parsed indices serialize into public configuration data.
History-table DDL generation packages/envio/src/bindings/ClickHouse.res, packages/cli/test/schemas/schema-with-clickhouse-options.graphql, scenarios/e2e_test/schema.graphql, packages/cli/src/hbs_templating/codegen_templates.rs	ClickHouse history-table creation emits configured INDEX definitions with resolved column names, types, and optional granularity. Fixtures and templates include bloom-filter and minmax indices.
Generated SQL and live validation packages/envio-tests/test/lib_tests/ClickHouse_test.res, packages/e2e-tests/src/e2e/e2e.test.ts	Tests verify index preservation, generated DDL, field resolution, ClickHouse metadata, index types, granularity, and cleanup behavior.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: ⚪ Minimal · up to ef4f5

The change adds validated ClickHouse skipping-index configuration and emits it into table creation; no actionable correctness, data, deployment, or availability risk remains at the current head after normal checks and review.

Sequence Diagram(s)

sequenceDiagram
  participant Schema
  participant CLI
  participant ClickHouseBinding
  participant ClickHouse
  Schema->>CLI: Define ClickHouse indices
  CLI->>ClickHouseBinding: Pass validated index configuration
  ClickHouseBinding->>ClickHouse: Create history-table INDEX definitions
  ClickHouse->>ClickHouseBinding: Expose index metadata

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Title check	✅ Passed	The title clearly and concisely describes the main change: adding ClickHouse data skipping index support to the @storage option.

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📥 Commits

Reviewing files that changed from the base of the PR and between fa91564 and 9d0755a.

📒 Files selected for processing (11)

• packages/cli/src/config_parsing/entity_parsing.rs
• packages/cli/src/config_parsing/public_config.rs
• packages/cli/src/hbs_templating/codegen_templates.rs
• packages/cli/test/schemas/schema-with-clickhouse-options.graphql
• packages/e2e-tests/src/e2e/e2e.test.ts
• packages/envio-tests/test/UserApiValidation_test.res
• packages/envio-tests/test/lib_tests/ClickHouse_test.res
• packages/envio/src/Config.res
• packages/envio/src/Internal.res
• packages/envio/src/bindings/ClickHouse.res
• scenarios/e2e_test/schema.graphql

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[DZakh]

Looks good to me. One comment is that I want to rename indicies to skippingIndexes

[moose-code]

Renamed to skippingIndexes in ef4f5e4 — the schema option, the internal config JSON key, and the Rust/ReScript identifiers all follow the new name. PR title/description updated to match.

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