Add classes to capture table metadata

Author: bishwajit-db

src/databricks/labs/remorph/reconcile/metadata/__init__.py

@@ -0,0 +1,36 @@
+from dataclasses import dataclass, field
+from typing import Any
+
+
+@dataclass
+class TableFQN:
+    catalog: str | None
+    schema: str
+    name: str
+
+    @property
+    def fqn(self) -> str:
+        if self.catalog:
+            return f"{self.catalog}.{self.schema}.{self.name}"
+        else:
+            return f"{self.schema}.{self.name}"
+
+
+@dataclass
+class FieldInfo:
+    name: str
+    data_type: str
+    nullable: bool | None = None
+    metadata: dict[str, Any] | None = None
+
+
+@dataclass
+class TableDefinition:
+    fqn: TableFQN
+    location: str | None = None
+    table_format: str | None = None
+    view_text: str | None = None
+    columns: list[FieldInfo] = field(default_factory=list)
+    primary_keys: list[str] | None = None
+    size_gb: int = 0
+    comment: str | None = None