Statement level query tag in NodeJS connector#339
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jiabin-hu wants to merge 2 commits intodatabricks:mainfrom
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Statement level query tag in NodeJS connector#339jiabin-hu wants to merge 2 commits intodatabricks:mainfrom
jiabin-hu wants to merge 2 commits intodatabricks:mainfrom
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Co-authored-by: Isaac
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vikrantpuppala
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Apr 6, 2026
## Summary - Adds per-statement query tag support via `driverctx.NewContextWithQueryTags`, allowing users to attach query tags to individual SQL statements through context - Tags are serialized into `TExecuteStatementReq.ConfOverlay["query_tags"]`, consistent with the Python ([#736](databricks/databricks-sql-python#736)) and NodeJS ([#339](databricks/databricks-sql-nodejs#339)) connector implementations - Previously only session-level query tags were supported (set once via `WithSessionParams` at connection time) ## Usage ```go ctx := driverctx.NewContextWithQueryTags(context.Background(), map[string]string{ "team": "data-eng", "app": "etl-pipeline", }) rows, err := db.QueryContext(ctx, "SELECT * FROM table") ``` ## Changes | File | Description | |------|-------------| | `driverctx/ctx.go` | `NewContextWithQueryTags`, `QueryTagsFromContext`, propagation in `NewContextFromBackground` | | `query_tags.go` *(new)* | `SerializeQueryTags` — map to wire format with escaping | | `connection.go` | Read tags from context → serialize → set `ConfOverlay["query_tags"]` | | `driverctx/ctx_test.go` | 5 tests for context helpers | | `query_tags_test.go` *(new)* | 13 tests for serialization (escaping, edge cases) | | `connection_test.go` | 6 integration tests verifying ConfOverlay behavior | | `examples/query_tags/main.go` | Updated with session + statement-level examples | ## Test plan - [x] Unit tests for `SerializeQueryTags` covering nil, empty, single/multi tags, escaping of `\`, `:`, `,` in values and keys - [x] Unit tests for `NewContextWithQueryTags` / `QueryTagsFromContext` including nil context, missing key, timeout preservation, background propagation - [x] Integration tests verifying `ConfOverlay["query_tags"]` is correctly set (or absent) in captured `TExecuteStatementReq` - [ ] Verify existing tests still pass (CI) This pull request was AI-assisted by Isaac. --------- Signed-off-by: Jooho Yeo <jooho.yeo@databricks.com> Co-authored-by: Jooho Yeo <jooho.yeo@databricks.com> Co-authored-by: Vikrant Puppala <vikrant.puppala@databricks.com>
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Summary
queryTagsoption toExecuteStatementOptionsfor per-statement query taggingserializeQueryTags()utility that converts a key/value dict to a comma-separatedkey:valuestring (matching the Python connector's format), with backslash-escaping for special characters in valuesconfOverlay["query_tags"]onTExecuteStatementReq, consistent with the Python connectorimplementation
Test plan
serializeQueryTagscovering null/empty input, basic serialization, null values, and special character escaping (tests/unit/utils/queryTags.test.ts)executeStatementverifyingconfOverlay.query_tagsis set/unset correctly (tests/unit/DBSQLSession.test.ts)npm testto confirm all unit tests pass