feat(thoughtspot): bidirectional ThoughtSpot TML <-> Ossie converter

.github/workflows/converter-thoughtspot-ci.yml

@@ -0,0 +1,69 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+name: Converters ThoughtSpot CI
+on:
+  push:
+    branches: [ "main" ]
+    paths:
+      - 'converters/thoughtspot/**'
+      - '.github/workflows/converter-thoughtspot-ci.yml'
+      # catalog.py's spec_construct_names() parses this file directly (it is the
+      # upstream-spec coverage oracle, not vendored into converters/thoughtspot/),
+      # so a change here must trigger this workflow even though it touches no
+      # converter file. No sibling workflow parses the spec, hence this addition
+      # is not mirrored anywhere else.
+      - 'core-spec/expression_language.md'
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - 'converters/thoughtspot/**'
+      - '.github/workflows/converter-thoughtspot-ci.yml'
+      - 'core-spec/expression_language.md'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install uv
+        run: |
+          curl -LsSf https://astral.sh/uv/install.sh | sh
+          echo "${HOME}/.local/bin" >> "${GITHUB_PATH}"
+
+      - name: Sync dependencies
+        working-directory: converters/thoughtspot
+        run: |
+          uv sync
+
+      - name: Unit Tests
+        working-directory: converters/thoughtspot
+        run: |
+          uv run pytest

converters/README.md

@@ -76,6 +76,7 @@ The Ossie specification currently defines extensions for the following vendors:
 | `OMNI` | Omni semantic model |
 | `WISDOM` | WisdomAI domain |
 | `NVIDIA_GSF` | NVIDIA Generative Semantic Fabric standalone YAML |
+| `THOUGHTSPOT` | ThoughtSpot TML (Model + Table/SQL View) |
 
 Each vendor may define custom extensions (via the `custom_extensions` field in the Ossie spec) to carry vendor-specific metadata that does not have an equivalent in the core specification.
 

converters/thoughtspot/.gitignore

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+__pycache__/
+*.py[cod]
+.pytest_cache/
+*.egg-info/
+dist/
+build/
+.venv/
+venv/

converters/thoughtspot/docs/datatype-map.md

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+<!--
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements.  See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership.  The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied.  See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+<!-- GENERATED FILE -- do not edit by hand.
+     Produced by `tools/generate_reference_docs.py` from:
+     - `src/ossie_thoughtspot/datatypes.py`
+     Regenerate with:
+       uv run --python 3.13 python tools/generate_reference_docs.py
+     tests/test_reference_docs_current.py fails the suite if this file
+     drifts from what the generator currently produces. -->
+
+# Ossie <-> ThoughtSpot Datatype Map
+
+The bidirectional Ossie <-> ThoughtSpot TML datatype map. The map is **not injective** — several Ossie types collapse onto one TML spelling and cannot be told apart on the way back; see "Not injective" below.
+
+## The closed Ossie datatype enum
+
+`Boolean`, `Date`, `DateTime`, `DateTimeTz`, `Decimal`, `Float`, `Integer`, `Opaque`, `String`, `Time`
+
+## Ossie -> TML
+
+| Ossie datatype | TML `data_type` (default) | Notes |
+|---|---|---|
+| `Boolean` | `BOOLEAN` | connection-dependent spelling — `BOOLEAN` by default, `BOOL` when the connection's own TML spells it that way |
+| `Date` | `DATE` | exact, single spelling |
+| `DateTime` | `DATE_TIME` | exact, single spelling |
+| `DateTimeTz` | `DATE_TIME` | ThoughtSpot has no offset-aware column type; the value becomes DATE_TIME and returns as DateTime. |
+| `Decimal` | `DOUBLE` | exact, single spelling |
+| `Float` | `DOUBLE` | connection-dependent spelling — `DOUBLE` by default, `FLOAT` when the connection's own TML spells it that way; ThoughtSpot has one approximate numeric type, so Float and Decimal both become DOUBLE and return as Decimal. |
+| `Integer` | `INT64` | exact, single spelling |
+| `Opaque` | `VARCHAR` | Opaque is Ossie's marker for a type outside the portable vocabulary; it becomes VARCHAR and returns as String. |
+| `String` | `VARCHAR` | exact, single spelling |
+| `Time` | `VARCHAR` | ThoughtSpot has no time-of-day column type; the value becomes VARCHAR. |
+
+A column with no declared `datatype` at all infers `INT64` rather than raising — `datatype` is optional in Ossie, but TML rejects a column with no `db_column_properties` block at all.
+
+## TML -> Ossie
+
+| TML `data_type` | Ossie datatype |
+|---|---|
+| `BOOL` | `Boolean` |
+| `BOOLEAN` | `Boolean` |
+| `DATE` | `Date` |
+| `DATE_TIME` | `DateTime` |
+| `DOUBLE` | `Decimal` |
+| `FLOAT` | `Float` |
+| `INT64` | `Integer` |
+| `VARCHAR` | `String` |
+
+A TML `data_type` outside this map returns no Ossie datatype at all — `datatype` is optional in Ossie, so omitting it is preferred over inventing one.
+
+## Not injective — declared losses
+
+| Ossie datatype | Why the round trip is lossy |
+|---|---|
+| `DateTimeTz` | ThoughtSpot has no offset-aware column type; the value becomes DATE_TIME and returns as DateTime. |
+| `Float` | ThoughtSpot has one approximate numeric type, so Float and Decimal both become DOUBLE and return as Decimal. |
+| `Opaque` | Opaque is Ossie's marker for a type outside the portable vocabulary; it becomes VARCHAR and returns as String. |
+| `Time` | ThoughtSpot has no time-of-day column type; the value becomes VARCHAR. |
+