enable output_format_arrow_string_as_string (#98)

fix #92

Author: nmreadelf

src/Core/Settings.h

@@ -983,7 +983,7 @@ class IColumn;
     M(UInt64, cross_to_inner_join_rewrite, 1, "Use inner join instead of comma/cross join if there're joining expressions in the WHERE section. Values: 0 - no rewrite, 1 - apply if possible for comma/cross, 2 - force rewrite all comma joins, cross - if possible", 0) \
     \
     M(Bool, output_format_arrow_low_cardinality_as_dictionary, false, "Enable output LowCardinality type as Dictionary Arrow type", 0) \
-    M(Bool, output_format_arrow_string_as_string, false, "Use Arrow String type instead of Binary for String columns", 0) \
+    M(Bool, output_format_arrow_string_as_string, true, "Use Arrow String type instead of Binary for String columns", 0) \
     M(Bool, output_format_arrow_fixed_string_as_fixed_byte_array, true, "Use Arrow FIXED_SIZE_BINARY type instead of Binary for FixedString columns.", 0) \
     M(ArrowCompression, output_format_arrow_compression_method, "lz4_frame", "Compression method for Arrow output format. Supported codecs: lz4_frame, zstd, none (uncompressed)", 0) \
     \