should be it

external/duckdb/test/sql/copy/copy_blob.test

@@ -0,0 +1,45 @@
+# name: test/sql/copy/copy_blob.test
+# group: [copy]
+
+statement error
+COPY (select 'foo') TO '__TEST_DIR__/test.blob' (FORMAT BLOB);
+----
+Binder Error: "COPY (FORMAT BLOB)" only supports a single BLOB column
+
+statement error
+COPY (select 'foo'::BLOB, 10) TO '__TEST_DIR__/test.blob' (FORMAT BLOB);
+----
+Binder Error: "COPY (FORMAT BLOB)" only supports a single BLOB column
+
+
+statement ok
+COPY (select 'foo'::BLOB) TO '__TEST_DIR__/test.blob' (FORMAT BLOB);
+
+query III
+select filename LIKE '%test.blob', content, size from read_blob('__TEST_DIR__/test.blob');
+----
+true	foo	3
+
+
+statement error
+COPY (select 'foo'::BLOB) TO '__TEST_DIR__/test.blob.gz' (FORMAT BLOB, ASDFGH);
+----
+Binder Error: Unrecognized option for COPY (FORMAT BLOB): "ASDFGH"
+
+# With compression
+statement ok
+COPY (select 'foo'::BLOB) TO '__TEST_DIR__/test.blob.gz' (FORMAT BLOB);
+
+query II
+select filename LIKE '%test.blob.gz', size from read_blob('__TEST_DIR__/test.blob.gz');
+----
+true	26
+
+# With explicit compression
+statement ok
+COPY (select 'foo'::BLOB) TO '__TEST_DIR__/test2.blob' (FORMAT BLOB, COMPRESSION 'GZIP');
+
+query II
+select filename LIKE '%test2.blob', size from read_blob('__TEST_DIR__/test2.blob');
+----
+true	26