[BUGFIX] Fix LegacyRow import. (#7446)

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great_expectations/core/util.py

@@ -76,9 +76,17 @@
 
 try:
     LegacyRow = sqlalchemy.engine.row.LegacyRow
+except (
+    ImportError,
+    AttributeError,
+):  # We need to catch an AttributeError since sqlalchemy>=2 does not have LegacyRow
+    LegacyRow = SQLALCHEMY_NOT_IMPORTED
+
+# This is a separate try/except than the LegacyRow one since TextClause exists in sqlalchemy 2. This means LegacyRow
+# may be not importable while TextClause is.
+try:
     TextClause = sqlalchemy.sql.elements.TextClause
 except ImportError:
-    LegacyRow = SQLALCHEMY_NOT_IMPORTED
     TextClause = SQLALCHEMY_NOT_IMPORTED
 
 SCHEMAS = {