feat(optimizer)!: add SHA function annotations for Hive (#6750)

Author: AbhishekASLK

sqlglot/typing/hive.py

@@ -14,6 +14,13 @@
             exp.Tanh,
         }
     },
+    **{
+        expr_type: {"returns": exp.DataType.Type.VARCHAR}
+        for expr_type in {
+            exp.SHA,
+            exp.SHA2,
+        }
+    },
     exp.Coalesce: {
         "annotator": lambda self, e: self._annotate_by_args(e, "this", "expressions", promote=True)
     },

tests/fixtures/optimizer/annotate_functions.sql

@@ -415,6 +415,18 @@ BINARY;
 TO_BINARY(tbl.double_col, tbl.str_col);
 BINARY;
 
+# dialect: hive, spark2, spark, databricks
+SHA(tbl.str_col);
+VARCHAR;
+
+# dialect: hive, spark2, spark, databricks
+SHA1(tbl.str_col);
+VARCHAR;
+
+# dialect: hive, spark2, spark, databricks
+SHA2(tbl.str_col, tbl.int_col);
+VARCHAR;
+
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 -- BigQuery
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