feat: expand _with_context tests and drop the dbt_expectations dependency by joostboon · Pull Request #1046 · elementary-data/dbt-data-reliability

joostboon · 2026-08-30T11:51:43Z

What

Adds five _with_context variants, extracts the duplicated context-column logic into one macro, and replaces the dbt_expectations regex call with a native cross-database implementation.

New tests, all _with_context: expression_is_true, not_empty_string, expect_column_pair_values_A_to_be_greater_than_B, expect_compound_columns_to_be_unique, expect_column_values_to_match_regex_list.

get_context_select_clause replaces six copies of the same ~20 line block, which would otherwise have become eleven. It also gates on execute: at parse time get_columns_in_relation is stubbed to [], so the old code warned that every context column was missing, once per column per test, on every full parse.

Why the regex rewrite

Both regex tests called dbt_expectations.regexp_instr, but dbt_expectations is not in packages.yml, so they only compiled for users who happened to install it themselves. dbt_expectations overrides regexp_instr for 7 adapters; everything else fell through to a default__ calling a function that does not exist on Athena, ClickHouse, Dremio, SQL Server or Fabric.

elementary.regexp_match covers all 15 adapter families using each engine's own primitive, returns a boolean rather than a string position, and raises a clear compile error on SQL Server and Fabric instead of emitting SQL that cannot run.

Important

Snowflake's and Dremio's regexp_like implicitly anchor at both ends and are not substring searches. Both are handled, with a regression test.

Breaking: `row_condition` is gone, use dbt's `where`

Review feedback was that row_condition duplicated something dbt already handles. Correct: dbt wraps the relation as (select * from rel where cond) dbt_subquery, and the uniqueness tests read from {{ model }} inside the window subquery, so rows are filtered before the window either way. It is dropped from all six tests that had it.

It was only reachable because where was broken on this family. With where set dbt passes model as a subquery string rather than a relation, and get_context_select_clause introspects it, so where plus context_columns failed with 'str object' has no attribute 'render'; the two uniqueness tests failed on where alone, because default_clause=none introspects unconditionally. This reproduces on pre-PR master, so it predates the branch and has been broken since 0.23.1. Fixed by resolving the relation through elementary.get_model_relation_for_test, which exists for exactly this and is already used by 14 other elementary tests.

Warning

expect_column_values_to_match_regex_with_context, expect_column_values_to_be_unique_with_context and expect_column_values_to_not_be_null_with_context shipped with row_condition in 0.23.1. A project still passing it now fails to parse with an unknown argument. The replacement is dbt's where config.

Behaviour changes a reviewer should check

The six existing _with_context tests shipped in 0.23.1. Everything below is a fix, but the first three change a test's result on unchanged data.

Where	Change
`match_regex_with_context` on Postgres	A NULL value is no longer a failure. The old `dbt_expectations` path wrapped the match in `coalesce(..., 0)`; every other adapter already ignored NULL.
`match_regex_with_context` on Spark / Databricks / Fabric Spark	A pattern that can match the empty string (`\d`, `.`, `a?`) goes from reporting every row to reporting none. The old `length(regexp_extract(...)) = 0` could not tell "no match" from "zero-length match".
`expect_column_values_to_be_unique_with_context`	NULL values are no longer reported as duplicates of each other, matching dbt's own `unique`.
all	Mixed-case and reserved column names now work: names resolve to the warehouse's own casing and are quoted.
all	dbt's `where` config now works. It was a hard compile error whenever `context_columns` was set, and on the uniqueness tests even without it.
all	`context_columns` as a bare string is now honoured (it was silently ignored, so the whole row was sampled), and `context_columns: []` now means "all columns" as documented.

Deprecation

accepted_range_with_context is deprecated and will be removed in the next release. dbt_utils.accepted_range already selects *, so this variant can never enrich a sample, only narrow one. It still works and still honours context_columns; the notice goes through edr_log_warning rather than exceptions.warn, so upgrading cannot fail a run under --warn-error.

The trade-off is real: narrowing is a legitimate use case, and anyone using it to keep PII out of stored samples loses it. The remaining levers are the show_sample_rows and PII tags, disable_test_samples, and test_sample_row_count. Deleting it outright would fail dbt parse for any project still listing it, so it is carried for one release.

Testing

14 integration tests in test_with_context_sampling.py. Full integration suite on duckdb: 231 passed, 13 skipped.

Coverage is uneven by design: the four regex tests skip sqlserver and fabric, where regexp_match raises because T-SQL has no regex; not_empty_string_with_context runs on 3 of 14 targets, because dbt seed reads an all-whitespace cell as NULL and only the direct seeders preserve a genuine empty string; the rest run everywhere.

Note

The Spark CI job is hitting its 60 minute limit and producing no result. It does the same on other branches that add tests, and takes 31 minutes on one that adds none, so it predates this PR. Flagging it because Spark is where the is_raw handling lands.

…ency Adds five requested _with_context variants, extracts the duplicated context column logic into one helper, and replaces the dbt_expectations regex call with a native cross-database implementation. New tests: expression_is_true_with_context not_empty_string_with_context expect_column_pair_values_A_to_be_greater_than_B_with_context expect_compound_columns_to_be_unique_with_context expect_column_values_to_match_regex_list_with_context get_context_select_clause replaces what was the same ~20 line block copied into every _with_context test, and would have been eleven copies with the new ones. It also guards on `execute`: at parse time `model` is the test node, so the old code queried a relation named after the test and warned that every context column was missing, once per test per parse. regexp_match is a new cross_db_util. The regex tests called dbt_expectations.regexp_instr even though dbt_expectations is not in packages.yml, so they only compiled for users who happened to install it. dbt_expectations implements regexp_instr for 8 adapters while Elementary supports 14, so the tests were also silently wrong on athena, clickhouse, dremio and vertica, and failed outright on sqlserver and fabric. The new macro returns a boolean rather than a position, which removes a boolean-compared-to-integer coercion, and T-SQL now raises a clear compile error instead of emitting SQL it cannot run. Note for anyone touching regexp_match: Snowflake's and Dremio's regexp_like implicitly anchor at both ends and are not drop-in replacements for a substring search. Both are handled, and an integration test covers it. Removes accepted_range_with_context. dbt_utils.accepted_range already selects * unconditionally, so the variant could only ever narrow a sample, never enrich one. Verified end to end on duckdb. Every test that shipped in 0.23.1 was compiled before and after and diffed: all produce identical SQL except the regex predicate, which changes shape but not semantics. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

github-actions · 2026-08-30T11:51:52Z

👋 @joostboon
Thank you for raising your pull request.
Please make sure to add tests and document all user-facing changes.
You can do this by editing the docs files in the elementary repository.

coderabbitai · 2026-08-30T11:52:02Z

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macros/edr/tests/test_utils/get_context_select_clause.sql

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macros/edr/tests/test_utils/get_context_select_clause.sql

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📝 Walkthrough

Walkthrough

The pull request centralizes context-column selection, adds five context-aware tests, deprecates the accepted-range context test, adds cross-database regex matching, and expands integration coverage.

Changes

Context-aware test expansion

Layer / File(s)	Summary
Shared context-column selection `macros/edr/tests/test_utils/get_context_select_clause.sql`, `macros/edr/tests/test_*.sql`	Adds shared column discovery, deduplication, missing-column handling, identifier quoting, parse-time behavior, prefixes, and fallbacks. Existing tests use the helper.
Cross-database regex matching `macros/utils/cross_db_utils/regexp_match.sql`, `macros/edr/tests/test_expect_column_values_to_match_regex_with_context.sql`	Adds adapter-dispatched regex matching, flag sanitization, inline flags, raw patterns, search semantics, and adapter-specific implementations.
Context-aware test macros and registration `macros/edr/tests/test_*.sql`, `macros/edr/tests/test_utils/get_test_type.sql`, `macros/utils/common_test_configs.sql`	Adds pair comparison, compound uniqueness, expression, empty-string, and regex-list tests. Registers the new tests and deprecates `accepted_range_with_context`.
Integration validation `integration_tests/tests/test_with_context_sampling.py`	Adds coverage for sampled columns, missing context columns, new context-aware tests, and regex substring, flag, any-match, and all-match behavior.

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: 🟡 Moderate · up to ca0ff

The change adds cross-database regex handling and modifies uniqueness sampling, but bounded correctness issues remain: apostrophes may generate invalid SQL, the e flag may produce incorrect matches on Snowflake and Redshift, and models with an n_records column may fail the uniqueness test. These should be fixed or explicitly accepted before merging.

Sequence Diagram(s)

sequenceDiagram
  participant IntegrationTest
  participant ContextTestMacro
  participant get_context_select_clause
  participant regexp_match
  participant Database
  IntegrationTest->>ContextTestMacro: run context-aware dbt test
  ContextTestMacro->>get_context_select_clause: resolve tested and context columns
  ContextTestMacro->>regexp_match: evaluate regex condition when required
  regexp_match->>Database: execute adapter-specific regex SQL
  Database-->>IntegrationTest: return failing rows and sampled columns

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Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 1 files. (1 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

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Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main changes: expanding `_with_context` tests and replacing the `dbt_expectations` regular-expression dependency.

Full details: Docstring Coverage

Explanation

Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 1 files. (1 skipped: 1 unsupported.)

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Inline comments:
In
`@macros/edr/tests/test_expect_column_values_to_match_regex_list_with_context.sql`:
- Line 11: Update the regex_list validation in
test_expect_column_values_to_match_regex_list_with_context so scalar string
values are rejected before match_conditions is built, while preserving the
existing handling for valid regex lists and empty values.

In `@macros/utils/common_test_configs.sql`:
- Line 479: Update the quality_dimension values for
expression_is_true_with_context and
expect_column_pair_values_A_to_be_greater_than_B_with_context to accuracy,
matching their non-context equivalents and ensuring generated test metadata and
alerts are classified correctly.

In `@macros/utils/cross_db_utils/regexp_match.sql`:
- Line 102: Update the regex rendering in the regexp_match macro so regex values
are escaped as adapter-aware SQL string literals before being passed to
regexp_instr, including quotes for non-raw branches and BigQuery’s raw-string
branch. Preserve Snowflake’s existing $$...$$ delimiter handling.

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integration_tests/tests/test_with_context_sampling.py
macros/edr/tests/test_accepted_range_with_context.sql
macros/edr/tests/test_expect_column_pair_values_A_to_be_greater_than_B_with_context.sql
macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql
macros/edr/tests/test_expect_column_values_to_match_regex_list_with_context.sql
macros/edr/tests/test_expect_column_values_to_match_regex_with_context.sql
macros/edr/tests/test_expect_column_values_to_not_be_null_with_context.sql
macros/edr/tests/test_expect_compound_columns_to_be_unique_with_context.sql
macros/edr/tests/test_expression_is_true_with_context.sql
macros/edr/tests/test_not_empty_string_with_context.sql
macros/edr/tests/test_not_null_with_context.sql
macros/edr/tests/test_relationships_with_context.sql
macros/edr/tests/test_utils/get_context_select_clause.sql
macros/edr/tests/test_utils/get_test_type.sql
macros/utils/common_test_configs.sql
macros/utils/cross_db_utils/regexp_match.sql

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macros/edr/tests/test_accepted_range_with_context.sql

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Blocker 1: the four new regex integration tests had no skip marker, so they would fail on sqlserver and fabric where regexp_match raises by design. Added skip_targets for both. Blocker 2: test_not_empty_string_with_context could never pass on a dbt seed based target. The default seeder writes a CSV and dbt types seed columns with agate Text(null_values=("null", "")), whose cast() checks `d.strip().lower() in null_values`, so any all-whitespace or empty cell is read as NULL. Verified against the real agate: ' ' casts to None. The column was therefore all NULL, trim(NULL) = '' is NULL, nothing failed and the status assertion blew up. Restricted to the three targets that bypass dbt seed and preserve the value verbatim. match_on now raises on anything other than any/all instead of silently falling back to "or", which inverted what the test asserted. It also accepts uppercase, which previously fell through to "or" as well. row_condition is now parenthesized. `where not (...) and {{ row_condition }}` turned `a = 1 or b = 2` into `(not(...) and a = 1) or b = 2`. Confirmed on duckdb: 2 matching rows with the parentheses, 3 without. Nits: dropped `g` from the Vertica flag alphabet, since it is a REGEXP_REPLACE modifier and REGEXP_LIKE would reject it, which is the exact failure the sanitizer exists to prevent. Corrected the is_raw docstring, which claimed the literal was identical on adapters without raw-string syntax; it is a silent no-op, and that matters where the engine processes backslash escapes. Corrected the regexp_inline_flags comment, which named only RE2/PCRE though it is also used for Postgres ARE and Java. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql (1)
6-12: 🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

Use a helper alias that cannot collide with model columns.

When model contains n_records, the inner query exposes both the source column and the window alias. The outer where n_records > 1 can then fail with an ambiguous-column error. Generate an alias absent from the model columns and use it in both locations. Add a fixture with a real n_records column.
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In `@macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql`
around lines 6 - 12, Update the uniqueness query around
get_context_select_clause to use a generated window-count alias that cannot
collide with any model column, and reference that same alias in the outer filter
instead of n_records. Add a fixture covering a model with a real n_records
column and verify the query remains unambiguous.
macros/utils/cross_db_utils/regexp_match.sql (1)
113-113: 🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

Remove e from the Snowflake and Redshift flags passed to REGEXP_INSTR.

e makes REGEXP_INSTR return the first capture-group position instead of the complete match position. With a(b)?, the pattern can match while the optional capture is absent, so > 0 may return false. Remove e from the supported alphabets or strip it before the call. Add a regression case for an optional capture group.
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only still-valid issues, skip the rest with a brief reason, keep changes
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In `@macros/utils/cross_db_utils/regexp_match.sql` at line 113, Update the
REGEXP_INSTR call in the regexp match utility to exclude or strip the e flag for
Snowflake and Redshift, ensuring it checks the complete match position rather
than a capture group. Add a regression case covering a pattern with an optional
capture group such as a(b)?.
Source: MCP tools

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Outside diff comments:
In `@macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql`:
- Around line 6-12: Update the uniqueness query around get_context_select_clause
to use a generated window-count alias that cannot collide with any model column,
and reference that same alias in the outer filter instead of n_records. Add a
fixture covering a model with a real n_records column and verify the query
remains unambiguous.

In `@macros/utils/cross_db_utils/regexp_match.sql`:
- Line 113: Update the REGEXP_INSTR call in the regexp match utility to exclude
or strip the e flag for Snowflake and Redshift, ensuring it checks the complete
match position rather than a capture group. Add a regression case covering a
pattern with an optional capture group such as a(b)?.

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integration_tests/tests/test_with_context_sampling.py
macros/edr/tests/test_expect_column_pair_values_A_to_be_greater_than_B_with_context.sql
macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql
macros/edr/tests/test_expect_column_values_to_match_regex_list_with_context.sql
macros/edr/tests/test_expect_column_values_to_match_regex_with_context.sql
macros/edr/tests/test_expect_column_values_to_not_be_null_with_context.sql
macros/edr/tests/test_expect_compound_columns_to_be_unique_with_context.sql
macros/utils/cross_db_utils/regexp_match.sql

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Fixes the one CI failure this PR introduced, plus a set of correctness issues found by running the macros rather than reading them. postgres CI: test_expect_column_pair_values_a_to_be_greater_than_b_with_context was 66 characters. conftest returns request.node.name verbatim as test_id and dbt_project uses it as the seed table name, dbt's seed materialization calls this.incorporate(type='table'), and PostgresRelation.__post_init__ rejects any identifier over 63 characters. Both postgres jobs errored during setup with "Relation name '...' is longer than 63 characters". Renamed to 46 characters. Every other target passed, so this was the only PR-caused red job. regex_list and column_list: a bare string satisfied the non-empty guard and was then iterated one character at a time. regex_list: "^abc$" compiled to five per-character predicates joined by or, and since ^ matches an empty position in every value the test passed unconditionally. Reproduced on duckdb: 0 failing rows for the string form against 2 for the correct list form. Both tests now coerce a scalar to a one-element list, and both guard emptiness BEFORE coercing so "" still raises rather than becoming [""]. Flag alphabets: dropped 'e' from snowflake and redshift, where it makes REGEXP_INSTR return a capture-group position rather than the match position, so the "> 0" that means "matched" reports a conforming row as a violation. Dropped 'g' from duckdb, which is the same bug the previous commit fixed for vertica; confirmed against duckdb 1.5.5: "Option 'g' (global replace) is only valid for regexp_replace". Negated flags now raise. Stripping the '-' as if it were an unsupported letter kept the letters after it, so flags="-i" emitted a case-insensitive match, the exact opposite of the request. There is no portable way to honor a negation (Postgres ARE has no (?-i), and where an alphabet carries a letter and its opposite absent does not mean off), so this fails loudly instead. Dremio: scoped the padding's (?s) to the padding groups. As a bare top-level directive it ran to the end of the whole pattern, so a user's '.' silently crossed newlines on this adapter alone. Verified the scoped form preserves search semantics across 11 cases including anchors and top-level alternation. quality_dimension: expression_is_true_with_context and expect_column_pair_values_A_to_be_greater_than_B_with_context were "validity" while the tests they mirror are "accuracy", so switching a test to the _with_context variant moved it between dimensions. All ten entries now match their base. Renamed the window helper to elementary_n_records in both unique tests. A tested model with its own n_records column produced two identically named columns in the derived table and an ambiguous outer reference. The alias is internal and never reaches the stored sample. get_context_select_clause: raise instead of returning an empty select list when a relation reports no columns, which emitted "select from (...)". Also corrected the parse-time comment, which claimed dbt would query a relation named after the test; get_columns_in_relation is decorated @available.parse_list, so dbt substitutes a stub returning [] and issues no query at all. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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Inline comments:
In `@macros/edr/tests/test_utils/get_context_select_clause.sql`:
- Line 19: Update get_context_select_clause so relation-derived column names are
passed through adapter.quote before applying the prefix, including the
default_clause=none path. Preserve the existing helper-column exclusion and
select-clause behavior while ensuring reserved and mixed-case identifiers are
emitted safely.

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integration_tests/tests/test_with_context_sampling.py
macros/edr/tests/test_expect_column_values_to_be_unique_with_context.sql
macros/edr/tests/test_expect_column_values_to_match_regex_list_with_context.sql
macros/edr/tests/test_expect_compound_columns_to_be_unique_with_context.sql
macros/edr/tests/test_utils/get_context_select_clause.sql
macros/utils/common_test_configs.sql
macros/utils/cross_db_utils/regexp_match.sql

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macros/utils/common_test_configs.sql

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Restores the test with a deprecation notice rather than deleting it outright. Generic tests resolve during schema parsing, so deleting it would have failed `dbt parse`, `compile`, `run` and `build` alike for any project still listing it in a schema.yml, with no hint about what replaced it. It shipped in 0.23.1. The shim is shorter than the code it replaces, because the context-column logic is now the shared get_context_select_clause helper. Its emitted SQL was diffed against the 0.23.1 implementation across ten argument shapes, including a case-mismatched duplicate column, a nonexistent context column, an empty list and a bare string: identical in all ten. The notice uses log(info=true) rather than exceptions.warn(), so that upgrading cannot fail a run for anyone using --warn-error. Defeating the purpose of the shim to emit a tidier warning would be a poor trade. Re-registered in both sites it needs to be in: the with_context list in get_test_type.sql, and the elementary namespace block of common_test_configs.sql, where its quality_dimension stays "validity" to match dbt_utils.accepted_range and its description now leads with the deprecation. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

The `default_clause=none` path lists every column of the tested relation, and did so unquoted. A mixed-case name on Snowflake (`myCol`, created quoted) folded to `MYCOL` and failed to resolve, and a reserved name on Postgres (`order`) was a syntax error. Both affected `expect_column_values_to_be_unique_with_context` and `expect_compound_columns_to_be_unique_with_context` whenever `context_columns` was omitted. Only the introspected names are quoted. They come from the warehouse's own metadata, so they are already in the relation's real case and quoting resolves to the same column. The user-supplied context and tested column names are left alone: callers write those in whatever case they like, and quoting them would stop them matching. Checked the one case that would have made this a regression: dbt-bigquery's _get_dbt_columns_from_bq_table iterates table.schema at the top level and passes sub-fields via col.fields, so it does not return dotted struct.field names that quoting would corrupt. `relationships_with_context`, the only caller passing a prefix, is unaffected: it passes default_clause="child.*" and never reaches this branch. Raised by CodeRabbit on PR #1046. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

dbt renders generic-test bodies while parsing, with execute=false. A compiler error raised there aborts every dbt command for the whole project rather than failing the one test, and `config: enabled: false` does not save it because the body is rendered before the node's config is consulted. Confirmed on dbt 1.12.3 with a stub generic test: `dbt parse` and `dbt ls --resource-type test` both abort, and the body logs execute=false. The same guard the select-clause helper already uses fixes all three sites. - sqlserver__regexp_match / fabric__regexp_match now raise only when execute is true and otherwise emit a valid predicate. A SQL Server project containing a regex test can parse again; the node still fails with the same message when it runs, which is what master did. - The negated-flag error is gated the same way. It also no longer refuses outright: adapters that take inline flags can express `(?-i)`, so `-` is now part of their alphabet and passes through. Adapters with a separate flags argument still refuse, because dropping `-` would enable exactly what the caller asked to disable. - Dropped-flag warnings move from exceptions.warn to edr_log_warning. exceptions.warn is escalated to an error by --warn-error, so at parse time it took the project down. That contradicted the comment above it, and the deprecation shim had already chosen log() for this reason. - The deprecation warning moves to edr_log_warning too, which gates on execute. It was printing once per node on every command that parses. Also from review: - Trino/Athena drop `U`. The engine is joni (Java), not RE2: joni throws UNDEFINED_GROUP_OPTION, and Java's `U` means UNICODE_CHARACTER_CLASS rather than RE2's ungreedy swap, so the letter would not even mean the same thing. - Adds a regression test pinning that a NULL value is not reported as a regex failure. Behaviour is unchanged from this branch and correct, but Postgres differed on master (its dbt_expectations path wrapped the match in coalesce(..., 0) and counted NULL rows as failing), so the contract is worth asserting. Postgres users will see such a test go green with no data change. - Widens the is_raw note: Redshift consumes backslashes too and has no raw form, Snowflake is exposed whenever is_raw is false, and the Databricks and Fabric Spark adapters inherit Spark's exposure. - Notes that Postgres ARE takes embedded options only at the very start of a pattern, so flags cannot be combined with a pattern already starting `(?...)`. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Adding `-` to eight alphabets let malformed forms through, because `-` is an ordinary character to the dropping loop. RE2, Java and joni all require a letter after it and reject a doubled one. Confirmed against DuckDB's RE2: `(?-i)` and `(?i-s)` parse, while `(?i-)`, `(?-)` and `(?--)` are rejected. Two checks, both gated on execute like the others: - Refuse `--` or a trailing `-` on input, matching the rule dbt_expectations encodes as `^(?!.*--)[-imsU]*(?<!-)$`. A leading `-` stays valid, that being the clear-what-follows form. - Drop a dangling `-` left behind by the letter loop. The input check cannot catch this one: `i-Z` is well formed until `Z` is dropped as unsupported, leaving `i-`. Clearing a flag the engine does not have is a no-op, so the operator goes with it. Also reconciles three comments that the previous commit left contradicting the code: the claim that `-` is always rejected rather than dropped, the older paragraph arguing no dialect can honor a negation, and the docstring rule that negation follows from taking inline flags. It does not: Postgres takes flags inline and still cannot express one. The rule is whether the adapter's alphabet lists `-`. Adds a harness covering the sanitizer across alphabets, including the parse-time paths and the drop-induced dangling operator. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

The previous check looked for an adjacent pair, so it caught "i-", "-" and "--i" but not "i-s-m" or "-i-s". The grammar is (?set-clear): at most one operator, with at least one letter after it, so both of those are parse errors on every engine that accepts a negation at all. They reached the engine as a regex syntax error, which is the outcome the sanitizer exists to prevent, on all eight adapters whose alphabet carries '-'. Counting the operator subsumes the adjacent-pair case, so nothing previously refused is now let through. dbt_expectations has the same hole: its _validate_re2_flags pattern ^(?!.*--)[-imsU]*(?<!-)$ accepts "i-s-m". Verified exhaustively rather than by spot check. Every flag string up to length four over each adapter's own alphabet plus an unsupported letter was run through the sanitizer and its output checked: 3,110 inputs on the RE2 adapters, each emitted pattern compiled by real RE2, and 25,260 on the Java/joni ones checked against the grammar and the alphabet. Zero invalid patterns. The paths that must keep working still do: "-i" gives (?-i), "i-s" gives (?i-s), "i-Z" gives (?i), "i-Zs" gives (?i-s), "-Z" gives no flags. Also recorded why popping a trailing '-' after dropping unsupported letters is sufficient: with at most one operator surviving the input check, a trailing one is the only malformed shape dropping can produce. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Every branch of regexp_match interpolated the pattern straight into '...', so a pattern containing a quote produced broken SQL rather than a test result: regex: "O'Reilly" emitted `col ~ 'O'Reilly'`. On the raw paths the delimiter itself was exposed, so a Snowflake is_raw pattern containing $$ terminated the literal early. dbt_expectations had the same hole, which is why this survived the port. The obvious shortcut is harmful, so it is avoided deliberately: elementary.escape_special_chars maps \ to \\ and would turn the pattern \d+ into a literal backslash followed by d+. regexp_pattern_literal instead escapes the delimiter and nothing else, in the form each lexer accepts: - Doubling ('') by default. It is the ANSI form and cannot disturb the pattern's backslashes. Vertica's own seeder in integration_tests relies on it, as do Postgres, Redshift, Snowflake, DuckDB, Trino, Athena and Dremio. - A backslash (\') on BigQuery, ClickHouse and the Spark family, none of which take the doubled form (Spark's lexer ends the literal at the second quote). ClickHouseDirectSeeder already escapes this way. Raw literals get the opposite treatment, because they escape nothing by definition. BigQuery moves the delimiter to whichever quote the pattern does not use. Snowflake has no alternative dollar tag to move to, so a raw pattern containing $$ is refused rather than requoted: falling back to '...' would start consuming the very backslashes is_raw was passed to preserve. Both refusals are gated on execute, so a stray pattern fails its own node instead of aborting parse for the whole project. Verified by rendering the real macros for all fourteen adapters under a dbt-like Jinja environment: the quote is escaped in the right form for each, \d+ survives untouched everywhere, the two inexpressible raw shapes raise at run time and still render at parse time. The integration test added here runs the quote case on the full warehouse matrix, since only real engines can confirm which escape each one actually accepts. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

get_context_select_clause: - Move the "could not resolve any columns" raise inside the `not has_context` branch, the only path that reads the all-columns clause. It previously fired ahead of that short-circuit, so a uniqueness test with `context_columns` on a relation dbt cannot introspect became a compile error where it used to emit working SQL. - Resolve every column name through one map (lowercased name to the warehouse's own casing, quoted). User-supplied names were emitted verbatim while introspected ones were quoted, so `order` on Postgres or `myCol` on Snowflake worked without `context_columns` and broke with it. This also replaces the parallel `selected_lower` list. - Coerce a bare-string `context_columns` to a single-element list, and treat an empty list or string as "no context requested". A scalar was silently discarded (widening the sample to every column) and `[]` silently narrowed it to the tested column, both contradicting the documented default. - Warn through `elementary.edr_log_warning` rather than a bare `log()`. Uniqueness tests: filter NULL keys before the window count. NULLs partition together, so they reported as duplicates of each other, unlike dbt's own `unique` and dbt_expectations' `all_values_are_missing` default. Argument validation: gate the four `raise_compiler_error` guards on `execute`. dbt renders generic test bodies while parsing, so one bad YAML value aborted every dbt command for the whole project, which is what the rest of this branch already guards against. regexp_match: - Honour `is_raw` on the Spark family. Spark and Databricks do have `r'...'` raw literals, so `is_raw=true` was silently producing a backslash-eating literal and turning `\d+` into `d+`. BigQuery and Spark share both the escape and the raw syntax, so they now share one helper. - Return early from flag sanitizing on T-SQL, so `sqlserver__regexp_match` reports that there is no regex function at all instead of the flag machinery complaining first about an empty alphabet. - Check malformed flags before unsupported negation, so `i-` reports as malformed rather than as an unsupported negation. - Accept a list-valued `flags` instead of raising a bare Jinja error. Tests: add `test_unique_with_context_without_context_columns`, which covers `default_clause=none` (nothing did) and the NULL handling. Give `test_expression_is_true_with_context` a row that satisfies its expression, so it can no longer pass with a predicate that matches everything. Pass `context_columns` as a bare string in one test to cover the coercion. Merge the two byte-identical regex tests into one three-row case that still discriminates both anchoring and NULL handling, keeping the dbt invocation count flat. Verified on duckdb: 230 passed, 13 skipped for the full integration suite. Each fix was checked by reverting it and confirming a test fails. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

haritamar · 2026-09-07T12:38:27Z

+    row_condition=none,
+    context_columns=none
+) %}
+    {%- set select_clause = elementary.get_context_select_clause(


Can we change this call and other calls to get_context_select_clause to pass kwargs rather than args? I think it will be a bit clearer

Good call, done. All eleven call sites now pass kwargs.

haritamar · 2026-09-07T12:40:36Z

+    column_A,
+    column_B,
+    or_equal=false,
+    row_condition=none,


Isn't dbt's where enough? Do we need row_condition?

We initially added row_condition to match the tests we are replacing, but you're right that it's old configuration and dbt's where is cleaner. Updated all the tests to use it.

haritamar · 2026-09-07T12:42:18Z

@@ -0,0 +1,21 @@
+{% test expect_column_pair_values_A_to_be_greater_than_B_with_context(


General comment (just didn't have anywhere to put it) - maybe we should put all the "with_context" tests in a dedicated folder?
as there are a lot of them.

Agreed, moved all eleven to macros/edr/tests/with_context/. macro-paths is recursive so nothing else had to change.

haritamar · 2026-09-07T12:44:18Z

+            dropped with a warning, by `regexp_sanitize_flags` below. `-` clears
+            the flags after it, and is accepted only on adapters whose alphabet
+            lists it, which is not the same as taking inline flags: Postgres
+            takes them inline and still cannot express a negation.


This docstring is a bit too long and technical IMO, please make it more concise.

In general this file has too many comment lines, please make them more concise / remove ones where the meaning in the code is clear enough.
Keep short context where it is indeed valuable and not clear from the code.
Avoid keeping here context that is a result of an AI conversation, and assume anyone reading this has no context of the specific PR / session in which the feature was added.

You're right, trimmed both. For now I kept only the notes where getting it wrong causes a real bug, like Snowflake's and Dremio's regexp_like anchoring at both ends.

Review feedback: `row_condition` duplicated something dbt already handles. It did, and it was only reachable because dbt's `where` config was broken on this family. With `where` set, dbt passes `model` as a subquery string rather than a relation, and `get_context_select_clause` introspects it, so `where` plus `context_columns` failed with "'str object' has no attribute 'render'" from inside `get_columns_in_relation`. The two uniqueness tests failed on `where` alone, because `default_clause=none` introspects unconditionally. Reproduced on pre-PR master, so this predates the branch and has been broken since the family shipped in 0.23.1. Resolve the relation through `elementary.get_model_relation_for_test`, which exists for exactly this ("Test model is a string, this might mean that a 'where' parameter was passed to the test") and is already used by 14 other elementary tests. Only column names come from the relation; the query still selects `from {{ model }}`, so the filter still applies. `row_condition` is then redundant, so drop it from all six tests. dbt wraps the relation as `(select * from rel where cond) dbt_subquery`, and the uniqueness tests read `from {{ model }}` inside the window subquery, so rows are filtered before the window either way. BREAKING: `expect_column_values_to_match_regex_with_context`, `expect_column_values_to_be_unique_with_context` and `expect_column_values_to_not_be_null_with_context` shipped with `row_condition` in 0.23.1. A project still passing it now fails to parse with an unknown argument. Replace it with dbt's `where` config, which is equivalent. Adds `test_with_context_honors_dbt_where_config`. Full integration suite on duckdb: 231 passed, 13 skipped. Reverting the relation resolution reproduces the original compilation error in that test. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Three review points, all behaviour-neutral. Move the eleven `_with_context` tests into `macros/edr/tests/with_context/`. `macro-paths` is recursive and nothing references these files by path. `get_context_select_clause` stays in `test_utils/` with the other helpers. Pass `get_context_select_clause` arguments as kwargs at all eleven call sites. Cut the comments. `regexp_match.sql` goes from 138 comment lines to 65 (38% to 22%), and the tests plus the helper from 65 to 41 (17% to 11%). Removed the running commentary on decisions and alternatives, the cross-references between `execute` guards, and the restatements of what the code says. Kept what causes a real bug if missed: that Snowflake's and Dremio's `regexp_like` anchor at both ends, Dremio's scoped `(?s:...)` padding, that Trino is joni rather than RE2 so `U` is unavailable, ClickHouse's UInt8 return, why a general escaper must not be used on a pattern, why `-` is refused rather than dropped, and why the T-SQL raise is gated on `execute`. Verified the two rewritten files are comment-only changes by comparing them with comments stripped and whitespace normalised. Full integration suite on duckdb: 231 passed, 13 skipped, which also confirms dbt still discovers the tests in the subfolder. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

The NULL-filter comment ended in `-#}`, which strips the following newline, so both uniqueness tests rendered `from "DB"."SCH"."TBL"where <col> is not null`. Snowflake reads the trailing `where` as a table alias and fails with "unexpected 'is'"; duckdb and ClickHouse happen to tokenize a keyword directly after a closing quote and accepted it, which is why the local duckdb run passed. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Merging the two regex tests produced a 67 character name, and the integration harness seeds a relation named after the test, so Postgres rejected it: "Relation name '...' is longer than 63 characters". Longest name in the file is now 58. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Picks up f10c1dc (render datetime values in render_value), which fixes the Fusion test_timings failure this branch was carrying.

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Comment thread macros/edr/tests/test_expect_column_values_to_match_regex_list_with_context.sql Outdated

Comment thread macros/utils/common_test_configs.sql Outdated

Comment thread macros/utils/cross_db_utils/regexp_match.sql Outdated

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joostboon mentioned this pull request Aug 30, 2026

docs: cover the five new with_context tests and drop accepted_range elementary-data/elementary#2338

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Comment thread macros/edr/tests/test_utils/get_context_select_clause.sql

joostboon and others added 7 commits September 1, 2026 11:22

haritamar reviewed Sep 7, 2026

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joostboon and others added 5 commits September 7, 2026 16:33

Merge master into feat/with-context-tests-expansion

dbd496c

Picks up f10c1dc (render datetime values in render_value), which fixes the Fusion test_timings failure this branch was carrying.

haritamar approved these changes Sep 7, 2026

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Merge branch 'master' into feat/with-context-tests-expansion

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haritamar enabled auto-merge (squash) September 7, 2026 21:03

haritamar merged commit c5912df into master Sep 7, 2026
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haritamar deleted the feat/with-context-tests-expansion branch September 7, 2026 21:24

		@@ -0,0 +1,21 @@
		{% test expect_column_pair_values_A_to_be_greater_than_B_with_context(

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joostboon commented Aug 30, 2026 •

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Breaking: `row_condition` is gone, use dbt's `where`

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