add sqlalchemy engine

cognee/infrastructure/databases/relational/config.py

@@ -11,9 +11,11 @@ class RelationalConfig(BaseSettings):
     db_port: str =  "5432"
     db_user: str = "cognee"
     db_password: str =  "cognee"
-    database_engine: object = create_relational_engine(db_path, db_name)
+    db_provider: str = "duckdb"
+    database_engine: object = create_relational_engine(db_path, db_name, db_provider)
     db_file_path: str = os.path.join(db_path, db_name)
 
+
     model_config = SettingsConfigDict(env_file = ".env", extra = "allow")
 
     def create_engine(self):
@@ -29,6 +31,7 @@ def to_dict(self) -> dict:
             "db_user": self.db_user,
             "db_password": self.db_password,
             "db_engine": self.database_engine,
+            "db_provider": self.db_provider,
         }
 
 @lru_cache

cognee/infrastructure/databases/relational/create_relational_engine.py

@@ -1,10 +1,33 @@
+from enum import Enum
+
+from cognee.infrastructure.databases.relational.sqlalchemy.SqlAlchemyAdapter import SQLAlchemyAdapter
 from cognee.infrastructure.files.storage import LocalStorage
-from cognee.infrastructure.databases.relational import DuckDBAdapter
+from cognee.infrastructure.databases.relational import DuckDBAdapter, get_relationaldb_config
+
+
+class DBProvider(Enum):
+    DUCKDB = "duckdb"
+    POSTGRES = "postgres"
+
+
 
-def create_relational_engine(db_path: str, db_name: str):
+def create_relational_engine(db_path: str, db_name: str, db_provider:str):
     LocalStorage.ensure_directory_exists(db_path)
 
-    return DuckDBAdapter(
-        db_name = db_name,
-        db_path = db_path,
-    )
+    llm_config = get_relationaldb_config()
+
+    provider = DBProvider(llm_config.llm_provider)
+
+
+    if provider == DBProvider.DUCKDB:
+
+        return DuckDBAdapter(
+            db_name = db_name,
+            db_path = db_path,
+        )
+    elif provider == DBProvider.POSTGRES:
+        return SQLAlchemyAdapter(
+            db_name = db_name,
+            db_path = db_path,
+            db_type = db_provider,
+        )

cognee/infrastructure/databases/relational/sqlalchemy/SqlAlchemyAdapter.py

@@ -0,0 +1,125 @@
+import os
+from sqlalchemy import create_engine, MetaData, Table, Column, String, Boolean, TIMESTAMP, text
+from sqlalchemy.orm import sessionmaker
+
+class SQLAlchemyAdapter():
+    def __init__(self, db_type: str, db_path: str, db_name: str):
+        self.db_location = os.path.abspath(os.path.join(db_path, db_name))
+        self.engine = create_engine(f"{db_type}:///{self.db_location}")
+        self.Session = sessionmaker(bind=self.engine)
+
+    def get_datasets(self):
+        with self.engine.connect() as connection:
+            result = connection.execute(text("SELECT DISTINCT schema_name FROM information_schema.tables;"))
+            tables = [row['schema_name'] for row in result]
+        return list(
+            filter(
+                lambda schema_name: not schema_name.endswith("staging") and schema_name != "cognee",
+                tables
+            )
+        )
+
+    def get_files_metadata(self, dataset_name: str):
+        with self.engine.connect() as connection:
+            result = connection.execute(text(f"SELECT id, name, file_path, extension, mime_type FROM {dataset_name}.file_metadata;"))
+            return [dict(row) for row in result]
+
+    def create_table(self, schema_name: str, table_name: str, table_config: list[dict]):
+        fields_query_parts = [f"{item['name']} {item['type']}" for item in table_config]
+        with self.engine.connect() as connection:
+            connection.execute(text(f"CREATE SCHEMA IF NOT EXISTS {schema_name};"))
+            connection.execute(text(f"CREATE TABLE IF NOT EXISTS {schema_name}.{table_name} ({', '.join(fields_query_parts)});"))
+
+    def delete_table(self, table_name: str):
+        with self.engine.connect() as connection:
+            connection.execute(text(f"DROP TABLE IF EXISTS {table_name};"))
+
+    def insert_data(self, schema_name: str, table_name: str, data: list[dict]):
+        columns = ", ".join(data[0].keys())
+        values = ", ".join([f"({', '.join([f':{key}' for key in row.keys()])})" for row in data])
+        insert_query = text(f"INSERT INTO {schema_name}.{table_name} ({columns}) VALUES {values};")
+        with self.engine.connect() as connection:
+            connection.execute(insert_query, data)
+
+    def get_data(self, table_name: str, filters: dict = None):
+        with self.engine.connect() as connection:
+            query = f"SELECT * FROM {table_name}"
+            if filters:
+                filter_conditions = " AND ".join([
+                    f"{key} IN ({', '.join([f':{key}{i}' for i in range(len(value))])})" if isinstance(value, list)
+                    else f"{key} = :{key}" for key, value in filters.items()
+                ])
+                query += f" WHERE {filter_conditions};"
+                query = text(query)
+                results = connection.execute(query, filters)
+            else:
+                query += ";"
+                query = text(query)
+                results = connection.execute(query)
+            return {result["data_id"]: result["status"] for result in results}
+
+    def execute_query(self, query):
+        with self.engine.connect() as connection:
+            result = connection.execute(text(query))
+            return [dict(row) for row in result]
+
+    def load_cognify_data(self, data):
+        metadata = MetaData()
+        cognify_table = Table(
+            'cognify', metadata,
+            Column('document_id', String),
+            Column('layer_id', String),
+            Column('created_at', TIMESTAMP, server_default=text('CURRENT_TIMESTAMP')),
+            Column('updated_at', TIMESTAMP, nullable=True, default=None),
+            Column('processed', Boolean, default=False),
+            Column('document_id_target', String, nullable=True)
+        )
+        metadata.create_all(self.engine)
+        insert_query = cognify_table.insert().values(document_id=text(':document_id'), layer_id=text(':layer_id'))
+        with self.engine.connect() as connection:
+            connection.execute(insert_query, data)
+
+    def fetch_cognify_data(self, excluded_document_id: str):
+        with self.engine.connect() as connection:
+            connection.execute(text("""
+                CREATE TABLE IF NOT EXISTS cognify (
+                    document_id STRING,
+                    layer_id STRING,
+                    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                    updated_at TIMESTAMP DEFAULT NULL,
+                    processed BOOLEAN DEFAULT FALSE,
+                    document_id_target STRING NULL
+                );
+            """))
+            query = text(f"""
+                SELECT document_id, layer_id, created_at, updated_at, processed
+                FROM cognify
+                WHERE document_id != :excluded_document_id AND processed = FALSE;
+            """)
+            records = connection.execute(query, {'excluded_document_id': excluded_document_id}).fetchall()
+            if records:
+                document_ids = tuple(record['document_id'] for record in records)
+                update_query = text(f"UPDATE cognify SET processed = TRUE WHERE document_id IN :document_ids;")
+                connection.execute(update_query, {'document_ids': document_ids})
+            return [dict(record) for record in records]
+
+    def delete_cognify_data(self):
+        with self.engine.connect() as connection:
+            connection.execute(text("""
+                CREATE TABLE IF NOT EXISTS cognify (
+                    document_id STRING,
+                    layer_id STRING,
+                    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                    updated_at TIMESTAMP DEFAULT NULL,
+                    processed BOOLEAN DEFAULT FALSE,
+                    document_id_target STRING NULL
+                );
+            """))
+            connection.execute(text("DELETE FROM cognify;"))
+            connection.execute(text("DROP TABLE cognify;"))
+
+    def delete_database(self):
+        from cognee.infrastructure.files.storage import LocalStorage
+        LocalStorage.remove(self.db_location)
+        if LocalStorage.file_exists(self.db_location + ".wal"):
+            LocalStorage.remove(self.db_location + ".wal")

cognee/infrastructure/databases/relational/user_authentication/authentication_db.py

@@ -5,6 +5,9 @@
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 from sqlalchemy.orm import DeclarativeBase
 
+from cognee.infrastructure.databases.relational import get_relationaldb_config
+from cognee.infrastructure.databases.relational.create_relational_engine import create_relational_engine
+
 DATABASE_URL = "sqlite+aiosqlite:///./test.db"
 
 
@@ -17,8 +20,10 @@ class User(SQLAlchemyBaseUserTableUUID, Base):
 
 
 
+llm_config = get_relationaldb_config()
+
 
-engine = create_async_engine(DATABASE_URL)
+engine = create_relational_engine(llm_config.db_path, llm_config.db_name, llm_config.db_provider)
 async_session_maker = async_sessionmaker(engine, expire_on_commit=False)