feat: add Cassandra and ScyllaDB database support (#300)

* feat: add Cassandra and ScyllaDB database support

Add Cassandra as the 11th database engine in TablePro, with ScyllaDB as a
secondary type sharing the same plugin (like MySQL/MariaDB). Uses the
DataStax C/C++ driver via a C bridge module.

- CassandraDriverPlugin with full CQL support (keyspaces, tables, views,
  indexes, schema introspection via system_schema)
- DatabaseType enum: .cassandra and .scylladb cases across all switch sites
- Connection URL schemes: cassandra://, cql://, scylladb://, scylla://
- Theme colors, icon assets, default port 9042
- CQL dialect with keywords, functions, and data types for autocomplete
- CI workflow support for building downloadable plugin (build-plugin.yml)
- Build script for DataStax cpp-driver + libuv static libraries
- Documentation (English + Vietnamese)
- Tests for DatabaseType properties and URL parsing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address PR review feedback for Cassandra plugin

* fix: remove orphaned case statement and add default branch for open DatabaseType

* fix: address code review issues in Cassandra plugin driver

* fix: improve Cassandra plugin SSL, type extraction, column ordering, and UX

* fix: register ScyllaDB as additional database type ID in Cassandra plugin

* fix: resolve deadlock, dead code, system keyspace filter, and EXPLAIN handling

* chore: remove pre-built Cassandra libs from PR

* chore: remove pre-built cassandra.h header from PR

* docs: add Chinese translation for Cassandra/ScyllaDB documentation

* chore: remove extra blank line in build-release.sh

* refactor: move Cassandra dialect and metadata from core app into plugin

* refactor: remove redundant explicit no-op case in DatabaseDriver switch

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Ngo Quoc Dat <datlechin@gmail.com>

Author: 3 people

.github/workflows/build-plugin.yml

@@ -57,22 +57,27 @@ jobs:
                 TARGET="OracleDriver"; BUNDLE_ID="com.TablePro.OracleDriver"
                 DISPLAY_NAME="Oracle Driver"; SUMMARY="Oracle Database 12c+ driver via OracleNIO"
                 DB_TYPE_IDS='["Oracle"]'; ICON="server.rack"; BUNDLE_NAME="OracleDriver"
-                HOMEPAGE="https://tablepro.app/databases/oracle" ;;
+                HOMEPAGE="https://docs.tablepro.app/databases/oracle" ;;
               clickhouse)
                 TARGET="ClickHouseDriver"; BUNDLE_ID="com.TablePro.ClickHouseDriver"
                 DISPLAY_NAME="ClickHouse Driver"; SUMMARY="ClickHouse OLAP database driver via HTTP interface"
                 DB_TYPE_IDS='["ClickHouse"]'; ICON="chart.bar.xaxis"; BUNDLE_NAME="ClickHouseDriver"
-                HOMEPAGE="https://tablepro.app/databases/clickhouse" ;;
+                HOMEPAGE="https://docs.tablepro.app/databases/clickhouse" ;;
               sqlite)
                 TARGET="SQLiteDriver"; BUNDLE_ID="com.TablePro.SQLiteDriver"
                 DISPLAY_NAME="SQLite Driver"; SUMMARY="SQLite embedded database driver"
                 DB_TYPE_IDS='["SQLite"]'; ICON="internaldrive"; BUNDLE_NAME="SQLiteDriver"
-                HOMEPAGE="https://tablepro.app" ;;
+                HOMEPAGE="https://docs.tablepro.app/databases/sqlite" ;;
               duckdb)
                 TARGET="DuckDBDriver"; BUNDLE_ID="com.TablePro.DuckDBDriver"
                 DISPLAY_NAME="DuckDB Driver"; SUMMARY="DuckDB analytical database driver"
                 DB_TYPE_IDS='["DuckDB"]'; ICON="bird"; BUNDLE_NAME="DuckDBDriver"
-                HOMEPAGE="https://tablepro.app" ;;
+                HOMEPAGE="https://docs.tablepro.app/databases/duckdb" ;;
+              cassandra)
+                TARGET="CassandraDriver"; BUNDLE_ID="com.TablePro.CassandraDriver"
+                DISPLAY_NAME="Cassandra Driver"; SUMMARY="Apache Cassandra and ScyllaDB driver via DataStax C driver"
+                DB_TYPE_IDS='["Cassandra", "ScyllaDB"]'; ICON="cassandra-icon"; BUNDLE_NAME="CassandraDriver"
+                HOMEPAGE="https://docs.tablepro.app/databases/cassandra" ;;
               *) echo "Unknown plugin: $plugin_name"; return 1 ;;
             esac
           }
@@ -91,6 +96,11 @@ jobs:
 
             echo "Building $TARGET v$VERSION"
 
+            # Build Cassandra dependencies if needed
+            if [ "$PLUGIN_NAME" = "cassandra" ]; then
+              ./scripts/build-cassandra.sh both
+            fi
+
             # Build both architectures
             ./scripts/build-plugin.sh "$TARGET" arm64
             ./scripts/build-plugin.sh "$TARGET" x86_64

CHANGELOG.md

@@ -50,6 +50,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Pre-connect script: run a shell command before each connection (e.g., to refresh credentials or update ~/.pgpass)
 - `ParameterStyle` enum in TableProPluginKit: plugins declare `?` or `$1` placeholder style via `parameterStyle` property on `PluginDatabaseDriver`
 - DML statement generation in ClickHouse, MSSQL, and Oracle plugins via `generateStatements()` for database-specific UPDATE/DELETE syntax
+- Cassandra and ScyllaDB database support via DataStax C driver (downloadable plugin)
 - `quoteIdentifier` method on `PluginDatabaseDriver` and `DatabaseDriver` protocols: plugins provide database-specific identifier quoting (backticks for MySQL/SQLite/ClickHouse, brackets for MSSQL, double-quotes for PostgreSQL/Oracle/DuckDB, passthrough for MongoDB/Redis)
 
 ### Changed

Plugins/CassandraDriverPlugin/CCassandra/CCassandra.h

@@ -0,0 +1,14 @@
+//
+//  CCassandra.h
+//  TablePro
+//
+//  C bridging header for the DataStax Cassandra C driver.
+//  Headers are bundled in the include/ subdirectory.
+//
+
+#ifndef CCassandra_h
+#define CCassandra_h
+
+#include "include/cassandra.h"
+
+#endif /* CCassandra_h */

Plugins/CassandraDriverPlugin/CCassandra/module.modulemap

@@ -0,0 +1,4 @@
+module CCassandra [system] {
+    header "CCassandra.h"
+    export *
+}