(2/x) Enable behaviour from #326 behind an environment variable

Signed-off-by: Jesse Whitehouse <jesse.whitehouse@databricks.com>

Author: Jesse Whitehouse

dbt/adapters/databricks/impl.py

@@ -2,6 +2,7 @@
 from contextlib import contextmanager
 from itertools import chain
 from dataclasses import dataclass
+import os
 import re
 from typing import (
     Any,
@@ -448,12 +449,17 @@ def _get_one_catalog(
                     table_names.add(relation.identifier)
 
         columns: List[Dict[str, Any]] = []
-        identifier = "|".join(table_names)
+
+        _identifier = "|".join(table_names)
+        bypass_2048_char_limit = os.environ.get("DBT_DESCRIBE_TABLE_2048_CHAR_BYPASS", "false")
+        if bypass_2048_char_limit == "true":
+            _identifier = _identifier if len(_identifier) < 2048 else "*"
+
         if len(table_names) > 0:
             schema_relation = self.Relation.create(
                 database=database,
                 schema=schema,
-                identifier=identifier,
+                identifier=_identifier,
                 quote_policy=self.config.quoting,
             )
             for relation, information in self._list_relations_with_information(schema_relation):