From 41c5055530b317c45066264a3fff75e4c3f94832 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 27 Feb 2026 19:15:47 +0000
Subject: [PATCH 1/5] fix: use py_<yymmdd>_<branch>_<hash> schema naming to
 prevent CI collisions
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Replace the old truncation-based schema naming with a hash-based approach
that prevents cross-branch collisions when concurrent CI jobs share the
same warehouse. Uses py_ prefix to identify the Python package CI
(matching dbt_ prefix in dbt-data-reliability).

Format: py_<YYMMDD>_<branch≤29>_<8-char-hash>
The hash is derived from the concurrency group key.

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>
---
 .github/workflows/test-warehouse.yml | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index fe52d9c7f..b5373e210 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -65,7 +65,8 @@ jobs:
       run:
         working-directory: elementary
     concurrency:
-      # This is what eventually defines the schema name in the data platform.
+      # Serialises runs for the same warehouse × dbt-version × branch.
+      # The schema name is derived from a hash of this group (see "Write dbt profiles").
       group: tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${{ github.head_ref || github.ref_name }}
       cancel-in-progress: true
     steps:
@@ -116,13 +117,25 @@ jobs:
         env:
           CI_WAREHOUSE_SECRETS: ${{ secrets.CI_WAREHOUSE_SECRETS || '' }}
         run: |
-          DBT_VERSION=$(pip show dbt-core | grep -i version | awk '{print $2}' | sed 's/\.//g')
-          UNDERSCORED_REF_NAME=$(echo "${{ inputs.warehouse-type }}_dbt_${DBT_VERSION}_${BRANCH_NAME}" | awk '{print tolower($0)}' | head -c 40 | sed "s/[-\/]/_/g")
+          # Schema name = py_<YYMMDD>_<branch≤29>_<8-char hash>
+          # The hash prevents collisions across concurrent jobs; the branch
+          # keeps it human-readable; the date helps with stale schema cleanup.
+          #
+          # Budget (PostgreSQL 63-char limit):
+          #   py_(3) + date(6) + _(1) + branch(≤29) + _(1) + hash(8) = 48
+          #   + _elementary(11) + _gw7(4) = 63
+          CONCURRENCY_GROUP="tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${BRANCH_NAME}"
+          SHORT_HASH=$(echo -n "$CONCURRENCY_GROUP" | sha256sum | head -c 8)
+          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g" | head -c 29)
+          DATE_STAMP=$(date +%y%m%d)
+          SCHEMA_NAME="py_${DATE_STAMP}_${SAFE_BRANCH}_${SHORT_HASH}"
+
+          echo "Schema name: $SCHEMA_NAME (branch='${BRANCH_NAME}', date=${DATE_STAMP}, hash of concurrency group)"
 
           python "${{ github.workspace }}/elementary/tests/profiles/generate_profiles.py" \
             --template "${{ github.workspace }}/elementary/tests/profiles/profiles.yml.j2" \
             --output ~/.dbt/profiles.yml \
-            --schema-name "py_$UNDERSCORED_REF_NAME"
+            --schema-name "$SCHEMA_NAME"
 
       - name: Run Python package unit tests
         run: pytest -vv tests/unit --warehouse-type ${{ inputs.warehouse-type }}

From 3f540f6861477074e59a87e6c106b099a9d09394 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 27 Feb 2026 19:20:49 +0000
Subject: [PATCH 2/5] style: collapse consecutive underscores in SAFE_BRANCH
 (CodeRabbit nitpick)

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>
---
 .github/workflows/test-warehouse.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index b5373e210..b166009ff 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -126,7 +126,7 @@ jobs:
           #   + _elementary(11) + _gw7(4) = 63
           CONCURRENCY_GROUP="tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${BRANCH_NAME}"
           SHORT_HASH=$(echo -n "$CONCURRENCY_GROUP" | sha256sum | head -c 8)
-          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g" | head -c 29)
+          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 29)
           DATE_STAMP=$(date +%y%m%d)
           SCHEMA_NAME="py_${DATE_STAMP}_${SAFE_BRANCH}_${SHORT_HASH}"
 

From 415b35b86cd1c288b547f54fd4437b91f960b02b Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 27 Feb 2026 21:09:45 +0000
Subject: [PATCH 3/5] feat: add HHMM to schema timestamp for per-run uniqueness

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>
---
 .github/workflows/test-warehouse.yml | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index b166009ff..0139e557d 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -117,20 +117,21 @@ jobs:
         env:
           CI_WAREHOUSE_SECRETS: ${{ secrets.CI_WAREHOUSE_SECRETS || '' }}
         run: |
-          # Schema name = py_<YYMMDD>_<branch≤29>_<8-char hash>
+          # Schema name = py_<YYMMDD_HHMM>_<branch≤21>_<8-char hash>
           # The hash prevents collisions across concurrent jobs; the branch
-          # keeps it human-readable; the date helps with stale schema cleanup.
+          # keeps it human-readable; the timestamp helps with stale schema
+          # cleanup and ensures each CI run gets a unique schema.
           #
           # Budget (PostgreSQL 63-char limit):
-          #   py_(3) + date(6) + _(1) + branch(≤29) + _(1) + hash(8) = 48
-          #   + _elementary(11) + _gw7(4) = 63
+          #   py_(3) + timestamp(11) + _(1) + branch(≤21) + _(1) + hash(8) = 45
+          #   + _elementary(11) + _gw7(4) = 60
           CONCURRENCY_GROUP="tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${BRANCH_NAME}"
           SHORT_HASH=$(echo -n "$CONCURRENCY_GROUP" | sha256sum | head -c 8)
-          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 29)
-          DATE_STAMP=$(date +%y%m%d)
+          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 21)
+          DATE_STAMP=$(date +%y%m%d_%H%M)
           SCHEMA_NAME="py_${DATE_STAMP}_${SAFE_BRANCH}_${SHORT_HASH}"
 
-          echo "Schema name: $SCHEMA_NAME (branch='${BRANCH_NAME}', date=${DATE_STAMP}, hash of concurrency group)"
+          echo "Schema name: $SCHEMA_NAME (branch='${BRANCH_NAME}', timestamp=${DATE_STAMP}, hash of concurrency group)"
 
           python "${{ github.workspace }}/elementary/tests/profiles/generate_profiles.py" \
             --template "${{ github.workspace }}/elementary/tests/profiles/profiles.yml.j2" \

From 4a3f43bf186b434ffb17325d891e95f3ea501373 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 27 Feb 2026 21:13:31 +0000
Subject: [PATCH 4/5] style: use explicit UTC for timestamp (date -u)

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>
---
 .github/workflows/test-warehouse.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index 0139e557d..5a720c475 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -128,7 +128,7 @@ jobs:
           CONCURRENCY_GROUP="tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${BRANCH_NAME}"
           SHORT_HASH=$(echo -n "$CONCURRENCY_GROUP" | sha256sum | head -c 8)
           SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 21)
-          DATE_STAMP=$(date +%y%m%d_%H%M)
+          DATE_STAMP=$(date -u +%y%m%d_%H%M)
           SCHEMA_NAME="py_${DATE_STAMP}_${SAFE_BRANCH}_${SHORT_HASH}"
 
           echo "Schema name: $SCHEMA_NAME (branch='${BRANCH_NAME}', timestamp=${DATE_STAMP}, hash of concurrency group)"

From 649af0b212a01274fab69d54d3b3e718b98f1c90 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 27 Feb 2026 21:56:41 +0000
Subject: [PATCH 5/5] style: add seconds to timestamp (YYMMDD_HHMMSS) per
 maintainer request

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>
---
 .github/workflows/test-warehouse.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test-warehouse.yml b/.github/workflows/test-warehouse.yml
index 5a720c475..73e1a2331 100644
--- a/.github/workflows/test-warehouse.yml
+++ b/.github/workflows/test-warehouse.yml
@@ -117,18 +117,18 @@ jobs:
         env:
           CI_WAREHOUSE_SECRETS: ${{ secrets.CI_WAREHOUSE_SECRETS || '' }}
         run: |
-          # Schema name = py_<YYMMDD_HHMM>_<branch≤21>_<8-char hash>
+          # Schema name = py_<YYMMDD_HHMMSS>_<branch≤19>_<8-char hash>
           # The hash prevents collisions across concurrent jobs; the branch
           # keeps it human-readable; the timestamp helps with stale schema
           # cleanup and ensures each CI run gets a unique schema.
           #
           # Budget (PostgreSQL 63-char limit):
-          #   py_(3) + timestamp(11) + _(1) + branch(≤21) + _(1) + hash(8) = 45
+          #   py_(3) + timestamp(13) + _(1) + branch(≤19) + _(1) + hash(8) = 45
           #   + _elementary(11) + _gw7(4) = 60
           CONCURRENCY_GROUP="tests_${{ inputs.warehouse-type }}_dbt_${{ inputs.dbt-version }}_${BRANCH_NAME}"
           SHORT_HASH=$(echo -n "$CONCURRENCY_GROUP" | sha256sum | head -c 8)
-          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 21)
-          DATE_STAMP=$(date -u +%y%m%d_%H%M)
+          SAFE_BRANCH=$(echo "${BRANCH_NAME}" | awk '{print tolower($0)}' | sed "s/[^a-z0-9]/_/g; s/__*/_/g" | head -c 19)
+          DATE_STAMP=$(date -u +%y%m%d_%H%M%S)
           SCHEMA_NAME="py_${DATE_STAMP}_${SAFE_BRANCH}_${SHORT_HASH}"
 
           echo "Schema name: $SCHEMA_NAME (branch='${BRANCH_NAME}', timestamp=${DATE_STAMP}, hash of concurrency group)"