fix: Dremio CI - single-threaded dbt run/test, fix cross-schema seed refs, quote reserved words

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>

Author: devin-ai-integration[bot]

.github/workflows/test-warehouse.yml

@@ -380,7 +380,12 @@ jobs:
       - name: Run e2e dbt project
         working-directory: ${{ env.E2E_DBT_PROJECT_DIR }}
         run: |
-          dbt run --target "${{ inputs.warehouse-type }}" || true
+          # Dremio needs single-threaded execution to avoid Nessie catalog race conditions
+          EXTRA_ARGS=""
+          if [ "${{ inputs.warehouse-type }}" = "dremio" ]; then
+            EXTRA_ARGS="--threads 1"
+          fi
+          dbt run --target "${{ inputs.warehouse-type }}" $EXTRA_ARGS || true
 
           # Validate run_results.json: only error_model should be non-success
           jq -e '
@@ -402,7 +407,12 @@ jobs:
         working-directory: ${{ env.E2E_DBT_PROJECT_DIR }}
         continue-on-error: true
         run: |
-          dbt test --target "${{ inputs.warehouse-type }}"
+          # Dremio needs single-threaded execution to avoid Nessie catalog race conditions
+          EXTRA_ARGS=""
+          if [ "${{ inputs.warehouse-type }}" = "dremio" ]; then
+            EXTRA_ARGS="--threads 1"
+          fi
+          dbt test --target "${{ inputs.warehouse-type }}" $EXTRA_ARGS
 
       - name: Run help
         run: edr --help

tests/e2e_dbt_project/macros/system/generate_schema_name.sql

@@ -5,8 +5,16 @@
     {% endif %}
 
     {% if node.resource_type == "seed" %}
+      {#- Dremio (Nessie/Iceberg): seeds are datalake nodes whose path is
+          root_path + custom_schema.  Views that ref() seeds resolve database
+          to target.datalake but schema via this macro.  We must return the
+          full root_path-qualified schema so the relation renders correctly
+          as  <datalake>.<root_path>.<custom_schema>.<identifier>. -#}
+      {% if target.type == 'dremio' %}
+        {% do return("{}.{}".format(target.root_path, custom_schema_name)) %}
+      {% endif %}
       {% do return(custom_schema_name) %}
     {% endif %}
 
-    {% do return("{}_{}".format(default_schema, custom_schema_name)) %}
+    {% do return("{}_{}" .format(default_schema, custom_schema_name)) %}
 {%- endmacro %}

tests/e2e_dbt_project/models/nested/models/tree/nested.sql

@@ -1 +1 @@
-select 1 as one
+select 1 as "one"

tests/e2e_dbt_project/models/numeric_column_anomalies.sql

@@ -16,14 +16,14 @@ source as (
      select
          updated_at,
          occurred_at,
-         min,
-         max,
+         "min",
+         "max",
          zero_count,
          zero_percent,
          average,
          standard_deviation,
          variance,
-         sum
+         "sum"
      from source
  )
 

tests/e2e_dbt_project/models/one.sql

@@ -1 +1 @@
-select 1 as one
+select 1 as "one"