[Groonga-commit] groonga/groonga at c267455 [master] select: use null instead of "null" for unknown type

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Kouhei Sutou null+****@clear*****
Tue May 24 23:47:51 JST 2016


Kouhei Sutou	2016-05-24 23:47:51 +0900 (Tue, 24 May 2016)

  New Revision: c26745583c2c07876efc8c42bdfbce33574e6d19
  https://github.com/groonga/groonga/commit/c26745583c2c07876efc8c42bdfbce33574e6d19

  Message:
    select: use null instead of "null" for unknown type
    
    It's backward incompatible but maybe nobody depends on it.

  Modified files:
    lib/output.c
    test/command/suite/select/filter/logical_operation/and/all_not_false.expected
    test/command/suite/select/filter/logical_operation/and/false.expected
    test/command/suite/select/filter/logical_operation/and/null.expected
    test/command/suite/select/filter/logical_operation/or/all_false.expected
    test/command/suite/select/filter/logical_operation/or/all_null.expected
    test/command/suite/select/filter/logical_operation/or/not_false.expected
    test/command/suite/select/function/highlight/default.expected
    test/command/suite/select/function/highlight/default_tag.expected
    test/command/suite/select/function/highlight/html_escape.expected
    test/command/suite/select/function/highlight/no_normalizer.expected
    test/command/suite/select/function/highlight/normalizer.expected
    test/command/suite/select/function/highlight/two_keywords.expected
    test/command/suite/select/function/highlight_full/invalid/lack_close_tag.expected
    test/command/suite/select/function/highlight_full/invalid/lack_normalizer.expected
    test/command/suite/select/function/highlight_full/invalid/not_normalizer.expected
    test/command/suite/select/function/highlight_full/no_normalize.expected
    test/command/suite/select/function/highlight_full/not_use_html_escape.expected
    test/command/suite/select/function/highlight_full/one_keyword.expected
    test/command/suite/select/function/highlight_full/two_keywords.expected
    test/command/suite/select/function/highlight_html/empty_column.expected
    test/command/suite/select/function/highlight_html/empty_query.expected
    test/command/suite/select/function/highlight_html/no_hit.expected
    test/command/suite/select/function/highlight_html/no_query.expected
    test/command/suite/select/function/highlight_html/one_hit.expected
    test/command/suite/select/function/highlight_html/one_keyword.expected
    test/command/suite/select/function/highlight_html/twice_hits.expected
    test/command/suite/select/function/highlight_html/two_keywords.expected
    test/command/suite/select/function/html_untag/attribute.expected
    test/command/suite/select/function/html_untag/cast.expected
    test/command/suite/select/function/html_untag/cast_failure.expected
    test/command/suite/select/function/html_untag/not_escaped_gt.expected
    test/command/suite/select/function/html_untag/simple.expected
    test/command/suite/select/function/number/number_classify/float.expected
    test/command/suite/select/function/number/number_classify/int32.expected
    test/command/suite/select/function/number/number_classify/uint32.expected
    test/command/suite/select/function/snippet/cache.expected
    test/command/suite/select/function/snippet/default.expected
    test/command/suite/select/function/snippet/default_tag.expected
    test/command/suite/select/function/snippet/empty_option.expected
    test/command/suite/select/function/snippet/html_escape.expected
    test/command/suite/select/function/snippet/leading_space.expected
    test/command/suite/select/function/snippet/max_results.expected
    test/command/suite/select/function/snippet/no_normalizer.expected
    test/command/suite/select/function/snippet/normalizer.expected
    test/command/suite/select/function/snippet/prefix.expected
    test/command/suite/select/function/snippet/suffix.expected
    test/command/suite/select/function/snippet/twice_keyword.expected
    test/command/suite/select/function/snippet_html/compressed.expected
    test/command/suite/select/function/snippet_html/concat.expected
    test/command/suite/select/function/snippet_html/empty_query.expected
    test/command/suite/select/function/snippet_html/empty_text.expected
    test/command/suite/select/function/snippet_html/first.expected
    test/command/suite/select/function/snippet_html/more.expected
    test/command/suite/select/function/snippet_html/none.expected
    test/command/suite/select/function/snippet_html/one.expected
    test/command/suite/select/function/snippet_html/second.expected
    test/command/suite/select/function/snippet_html/third.expected
    test/command/suite/select/function/snippet_html/twice.expected
    test/command/suite/select/function/string/string_length/ascii.expected
    test/command/suite/select/function/string/string_length/invalid.expected
    test/command/suite/select/function/string/string_length/multibyte.expected
    test/command/suite/select/function/time/time_classify_day/valid.expected
    test/command/suite/select/function/time/time_classify_hour/default.expected
    test/command/suite/select/function/time/time_classify_hour/interval.expected
    test/command/suite/select/function/time/time_classify_minute/default.expected
    test/command/suite/select/function/time/time_classify_minute/interval.expected
    test/command/suite/select/function/time/time_classify_month/default.expected
    test/command/suite/select/function/time/time_classify_month/interval.expected
    test/command/suite/select/function/time/time_classify_second/default.expected
    test/command/suite/select/function/time/time_classify_second/interval.expected
    test/command/suite/select/function/time/time_classify_week/not_underflowed.expected
    test/command/suite/select/function/time/time_classify_week/underflow_month.expected
    test/command/suite/select/function/time/time_classify_week/underflow_year.expected
    test/command/suite/select/function/time/time_classify_year/default.expected
    test/command/suite/select/function/time/time_classify_year/interval.expected
    test/command/suite/select/function/vector/vector_size/reference_vector.expected
    test/command/suite/select/function/vector/vector_size/vector.expected
    test/command/suite/select/output_columns/expression/addition.expected
    test/command/suite/select/output_columns/expression/division.expected
    test/command/suite/select/output_columns/expression/literal/string/double_quote.expected
    test/command/suite/select/output_columns/expression/literal/string/single_quote.expected
    test/command/suite/select/output_columns/expression/multiplication.expected
    test/command/suite/select/output_columns/expression/string_plus.expected
    test/command/suite/select/output_columns/expression/subtraction.expected
    test/command/suite/select/output_columns/function_call.expected

  Modified: lib/output.c (+1 -1)
===================================================================
--- lib/output.c    2016-05-24 23:29:34 +0900 (44542b2)
+++ lib/output.c    2016-05-24 23:47:51 +0900 (9fc26d4)
@@ -1374,7 +1374,7 @@ grn_output_table_column(grn_ctx *ctx, grn_obj *outbuf,
                                  outbuf,
                                  output_type,
                                  GRN_TEXT_VALUE(buf),
-                                 "null");
+                                 NULL);
   } else {
     grn_obj *range_obj;
     char type_name[GRN_TABLE_MAX_KEY_SIZE];

  Modified: test/command/suite/select/filter/logical_operation/and/all_not_false.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/and/all_not_false.expected    2016-05-24 23:29:34 +0900 (fe49e1f)
+++ test/command/suite/select/filter/logical_operation/and/all_not_false.expected    2016-05-24 23:47:51 +0900 (be7bb47)
@@ -8,4 +8,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users   --output_columns '_id, "not false" && 29 && name'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,"Alice"]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,"Alice"]]]]

  Modified: test/command/suite/select/filter/logical_operation/and/false.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/and/false.expected    2016-05-24 23:29:34 +0900 (f5b380a)
+++ test/command/suite/select/filter/logical_operation/and/false.expected    2016-05-24 23:47:51 +0900 (79c1721)
@@ -7,4 +7,4 @@ load --table Records
 ]
 [[0,0.0,0.0],1]
 select Records   --output_columns '_id, false && "not false"'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,false]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,false]]]]

  Modified: test/command/suite/select/filter/logical_operation/and/null.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/and/null.expected    2016-05-24 23:29:34 +0900 (bcf7959)
+++ test/command/suite/select/filter/logical_operation/and/null.expected    2016-05-24 23:47:51 +0900 (41e7580)
@@ -7,4 +7,4 @@ load --table Records
 ]
 [[0,0.0,0.0],1]
 select Records   --output_columns '_id, null && "not false"'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,false]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,false]]]]

  Modified: test/command/suite/select/filter/logical_operation/or/all_false.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/or/all_false.expected    2016-05-24 23:29:34 +0900 (884e8ee)
+++ test/command/suite/select/filter/logical_operation/or/all_false.expected    2016-05-24 23:47:51 +0900 (fc5a510)
@@ -7,4 +7,4 @@ load --table Records
 ]
 [[0,0.0,0.0],1]
 select Records   --output_columns '_id, false || false || false'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,false]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,false]]]]

  Modified: test/command/suite/select/filter/logical_operation/or/all_null.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/or/all_null.expected    2016-05-24 23:29:34 +0900 (3a3eb68)
+++ test/command/suite/select/filter/logical_operation/or/all_null.expected    2016-05-24 23:47:51 +0900 (662a4e4)
@@ -7,4 +7,4 @@ load --table Records
 ]
 [[0,0.0,0.0],1]
 select Records   --output_columns '_id, null || null || null'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,false]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,false]]]]

  Modified: test/command/suite/select/filter/logical_operation/or/not_false.expected (+1 -1)
===================================================================
--- test/command/suite/select/filter/logical_operation/or/not_false.expected    2016-05-24 23:29:34 +0900 (f590d3a)
+++ test/command/suite/select/filter/logical_operation/or/not_false.expected    2016-05-24 23:47:51 +0900 (3df6046)
@@ -8,4 +8,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users   --output_columns '_id, null || name || "unknown"'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,"Alice"]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,"Alice"]]]]

  Modified: test/command/suite/select/function/highlight/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/default.expected    2016-05-24 23:29:34 +0900 (e558bad)
+++ test/command/suite/select/function/highlight/default.expected    2016-05-24 23:47:51 +0900 (d3afcdb)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "groonga", "<span class=\\"
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight/default_tag.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/default_tag.expected    2016-05-24 23:29:34 +0900 (60c83f8)
+++ test/command/suite/select/function/highlight/default_tag.expected    2016-05-24 23:47:51 +0900 (f9d1175)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "Groonga", "Mroonga",   {"d
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight/html_escape.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/html_escape.expected    2016-05-24 23:29:34 +0900 (ea46750)
+++ test/command/suite/select/function/highlight/html_escape.expected    2016-05-24 23:47:51 +0900 (c3fd8e7)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "groonga", "<span class=\\"
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight/no_normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/no_normalizer.expected    2016-05-24 23:29:34 +0900 (af3fb3b)
+++ test/command/suite/select/function/highlight/no_normalizer.expected    2016-05-24 23:47:51 +0900 (193b2da)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "groonga", "<span class=\\"
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight/normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/normalizer.expected    2016-05-24 23:29:34 +0900 (5cd8413)
+++ test/command/suite/select/function/highlight/normalizer.expected    2016-05-24 23:47:51 +0900 (f73a109)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "groonga", "<span class=\\"
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight/two_keywords.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight/two_keywords.expected    2016-05-24 23:29:34 +0900 (7625a5b)
+++ test/command/suite/select/function/highlight/two_keywords.expected    2016-05-24 23:47:51 +0900 (80f14a3)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight(body,   "Groonga", "<span class=\\"
       [
         [
           "highlight",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_full/invalid/lack_close_tag.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/invalid/lack_close_tag.expected    2016-05-24 23:29:34 +0900 (1f20b8a)
+++ test/command/suite/select/function/highlight_full/invalid/lack_close_tag.expected    2016-05-24 23:47:51 +0900 (f8e4dea)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries --output_columns   'highlight_full(body, "NormalizerAuto", true,   "Groonga", "<span class=\\"keyword1\\">", "</span>",   "mysql", "<span class=\\"keyword2\\">")'
-[[0,0.0,0.0],[[[1],[["highlight_full","null"]],[null]]]]
+[[0,0.0,0.0],[[[1],[["highlight_full",null]],[null]]]]

  Modified: test/command/suite/select/function/highlight_full/invalid/lack_normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/invalid/lack_normalizer.expected    2016-05-24 23:29:34 +0900 (31332cf)
+++ test/command/suite/select/function/highlight_full/invalid/lack_normalizer.expected    2016-05-24 23:47:51 +0900 (3fcf440)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries --output_columns   'highlight_full(body, true,   "Groonga", "<span class=\\"keyword1\\">", "</span>")'
-[[0,0.0,0.0],[[[1],[["highlight_full","null"]],[null]]]]
+[[0,0.0,0.0],[[[1],[["highlight_full",null]],[null]]]]

  Modified: test/command/suite/select/function/highlight_full/invalid/not_normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/invalid/not_normalizer.expected    2016-05-24 23:29:34 +0900 (1b5051e)
+++ test/command/suite/select/function/highlight_full/invalid/not_normalizer.expected    2016-05-24 23:47:51 +0900 (55d0c0f)
@@ -25,7 +25,7 @@ select Entries --output_columns   'highlight_full(body, "TokenBigram", true,   "
       [
         [
           "highlight_full",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_full/no_normalize.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/no_normalize.expected    2016-05-24 23:29:34 +0900 (f544916)
+++ test/command/suite/select/function/highlight_full/no_normalize.expected    2016-05-24 23:47:51 +0900 (d0343e9)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight_full(body, "", true,   "Groonga", "
       [
         [
           "highlight_full",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_full/not_use_html_escape.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/not_use_html_escape.expected    2016-05-24 23:29:34 +0900 (87a4766)
+++ test/command/suite/select/function/highlight_full/not_use_html_escape.expected    2016-05-24 23:47:51 +0900 (4f879c1)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight_full(body, "NormalizerAuto", false,
       [
         [
           "highlight_full",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_full/one_keyword.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/one_keyword.expected    2016-05-24 23:29:34 +0900 (a140874)
+++ test/command/suite/select/function/highlight_full/one_keyword.expected    2016-05-24 23:47:51 +0900 (b463e01)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight_full(body, "NormalizerAuto", true,
       [
         [
           "highlight_full",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_full/two_keywords.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_full/two_keywords.expected    2016-05-24 23:29:34 +0900 (6267fb3)
+++ test/command/suite/select/function/highlight_full/two_keywords.expected    2016-05-24 23:47:51 +0900 (7d536e9)
@@ -22,7 +22,7 @@ select Entries --output_columns   'highlight_full(body, "NormalizerAuto", true,
       [
         [
           "highlight_full",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/empty_column.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/empty_column.expected    2016-05-24 23:29:34 +0900 (440c083)
+++ test/command/suite/select/function/highlight_html/empty_column.expected    2016-05-24 23:47:51 +0900 (24209fc)
@@ -12,4 +12,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries --output_columns   --query 'body:@groonga OR _id:1'   --output_columns 'highlight_html(body)'
-[[0,0.0,0.0],[[[1],[["highlight_html","null"]],[""]]]]
+[[0,0.0,0.0],[[[1],[["highlight_html",null]],[""]]]]

  Modified: test/command/suite/select/function/highlight_html/empty_query.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/empty_query.expected    2016-05-24 23:29:34 +0900 (5aecf6f)
+++ test/command/suite/select/function/highlight_html/empty_query.expected    2016-05-24 23:47:51 +0900 (725ee26)
@@ -26,7 +26,7 @@ select Entries --output_columns   --match_columns body --query ''   --output_col
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/no_hit.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/no_hit.expected    2016-05-24 23:29:34 +0900 (c0dcb9f)
+++ test/command/suite/select/function/highlight_html/no_hit.expected    2016-05-24 23:47:51 +0900 (9139d23)
@@ -12,4 +12,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries --output_columns   --match_columns body --query 'droonga'   --output_columns 'highlight_html(body)'
-[[0,0.0,0.0],[[[0],[["highlight_html","null"]]]]]
+[[0,0.0,0.0],[[[0],[["highlight_html",null]]]]]

  Modified: test/command/suite/select/function/highlight_html/no_query.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/no_query.expected    2016-05-24 23:29:34 +0900 (b058139)
+++ test/command/suite/select/function/highlight_html/no_query.expected    2016-05-24 23:47:51 +0900 (65fea44)
@@ -26,7 +26,7 @@ select Entries   --output_columns 'highlight_html(body)'
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/one_hit.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/one_hit.expected    2016-05-24 23:29:34 +0900 (5cf2211)
+++ test/command/suite/select/function/highlight_html/one_hit.expected    2016-05-24 23:47:51 +0900 (37d0f03)
@@ -26,7 +26,7 @@ select Entries --output_columns   --match_columns body --query 'rroonga'   --out
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/one_keyword.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/one_keyword.expected    2016-05-24 23:29:34 +0900 (393e3eb)
+++ test/command/suite/select/function/highlight_html/one_keyword.expected    2016-05-24 23:47:51 +0900 (39ceefd)
@@ -26,7 +26,7 @@ select Entries --output_columns   --match_columns body --query 'groonga'   --out
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/twice_hits.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/twice_hits.expected    2016-05-24 23:29:34 +0900 (f26c07a)
+++ test/command/suite/select/function/highlight_html/twice_hits.expected    2016-05-24 23:47:51 +0900 (b4ecf45)
@@ -26,7 +26,7 @@ select Entries --output_columns   --match_columns body --query 'Groonga'   --out
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/highlight_html/two_keywords.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/highlight_html/two_keywords.expected    2016-05-24 23:29:34 +0900 (314a68b)
+++ test/command/suite/select/function/highlight_html/two_keywords.expected    2016-05-24 23:47:51 +0900 (e1adc76)
@@ -26,7 +26,7 @@ select Entries --output_columns   --match_columns body --query 'groonga mysql'
       [
         [
           "highlight_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/html_untag/attribute.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/html_untag/attribute.expected    2016-05-24 23:29:34 +0900 (e06e7c2)
+++ test/command/suite/select/function/html_untag/attribute.expected    2016-05-24 23:47:51 +0900 (3ebe192)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries   --output_columns "html_untag(content)"
-[[0,0.0,0.0],[[[1],[["html_untag","null"]],["I am a boy."]]]]
+[[0,0.0,0.0],[[[1],[["html_untag",null]],["I am a boy."]]]]

  Modified: test/command/suite/select/function/html_untag/cast.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/html_untag/cast.expected    2016-05-24 23:29:34 +0900 (a3d68e1)
+++ test/command/suite/select/function/html_untag/cast.expected    2016-05-24 23:47:51 +0900 (8fcef51)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries   --output_columns "html_untag(id)"
-[[0,0.0,0.0],[[[1],[["html_untag","null"]],["29"]]]]
+[[0,0.0,0.0],[[[1],[["html_untag",null]],["29"]]]]

  Modified: test/command/suite/select/function/html_untag/cast_failure.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/html_untag/cast_failure.expected    2016-05-24 23:29:34 +0900 (ff11dea)
+++ test/command/suite/select/function/html_untag/cast_failure.expected    2016-05-24 23:47:51 +0900 (a5c8898)
@@ -27,7 +27,7 @@ select Entries   --output_columns "html_untag(keyword)"
       [
         [
           "html_untag",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/html_untag/not_escaped_gt.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/html_untag/not_escaped_gt.expected    2016-05-24 23:29:34 +0900 (7728636)
+++ test/command/suite/select/function/html_untag/not_escaped_gt.expected    2016-05-24 23:47:51 +0900 (19c7f47)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries   --output_columns "html_untag(content)"
-[[0,0.0,0.0],[[[1],[["html_untag","null"]],["I am a boy. >:|"]]]]
+[[0,0.0,0.0],[[[1],[["html_untag",null]],["I am a boy. >:|"]]]]

  Modified: test/command/suite/select/function/html_untag/simple.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/html_untag/simple.expected    2016-05-24 23:29:34 +0900 (342c9a7)
+++ test/command/suite/select/function/html_untag/simple.expected    2016-05-24 23:47:51 +0900 (dd33119)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries   --output_columns "html_untag(content)"
-[[0,0.0,0.0],[[[1],[["html_untag","null"]],["I am a boy."]]]]
+[[0,0.0,0.0],[[[1],[["html_untag",null]],["I am a boy."]]]]

  Modified: test/command/suite/select/function/number/number_classify/float.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/number/number_classify/float.expected    2016-05-24 23:29:34 +0900 (e6907f8)
+++ test/command/suite/select/function/number/number_classify/float.expected    2016-05-24 23:47:51 +0900 (fa720fb)
@@ -40,7 +40,7 @@ select Prices   --sortby _id   --limit -1   --output_columns '_key, number_class
         ],
         [
           "number_classify",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/number/number_classify/int32.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/number/number_classify/int32.expected    2016-05-24 23:29:34 +0900 (5682b4b)
+++ test/command/suite/select/function/number/number_classify/int32.expected    2016-05-24 23:47:51 +0900 (294b826)
@@ -40,7 +40,7 @@ select Prices   --sortby _id   --limit -1   --output_columns '_key, number_class
         ],
         [
           "number_classify",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/number/number_classify/uint32.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/number/number_classify/uint32.expected    2016-05-24 23:29:34 +0900 (86cc2bc)
+++ test/command/suite/select/function/number/number_classify/uint32.expected    2016-05-24 23:47:51 +0900 (e77b68d)
@@ -33,7 +33,7 @@ select Prices   --sortby _id   --limit -1   --output_columns '_key, number_class
         ],
         [
           "number_classify",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/cache.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/cache.expected    2016-05-24 23:29:34 +0900 (8d71591)
+++ test/command/suite/select/function/snippet/cache.expected    2016-05-24 23:47:51 +0900 (00903db)
@@ -23,7 +23,7 @@ select Entries   --output_columns '   snippet(content,   "SQL", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/default.expected    2016-05-24 23:29:34 +0900 (438ac6b)
+++ test/command/suite/select/function/snippet/default.expected    2016-05-24 23:47:51 +0900 (ce7cb92)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "Groonga", "<span class
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/default_tag.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/default_tag.expected    2016-05-24 23:29:34 +0900 (bac613c)
+++ test/command/suite/select/function/snippet/default_tag.expected    2016-05-24 23:47:51 +0900 (df442cf)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "Groonga", "MySQL",   {
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/empty_option.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/empty_option.expected    2016-05-24 23:29:34 +0900 (e4924f1)
+++ test/command/suite/select/function/snippet/empty_option.expected    2016-05-24 23:47:51 +0900 (15027b6)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "Groonga", "<span class
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/html_escape.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/html_escape.expected    2016-05-24 23:29:34 +0900 (642892c)
+++ test/command/suite/select/function/snippet/html_escape.expected    2016-05-24 23:47:51 +0900 (7e3d8e8)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "groonga", "<span class
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/leading_space.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/leading_space.expected    2016-05-24 23:29:34 +0900 (61ae889)
+++ test/command/suite/select/function/snippet/leading_space.expected    2016-05-24 23:47:51 +0900 (3a096c8)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "MySQL", "<span class=\
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/max_results.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/max_results.expected    2016-05-24 23:29:34 +0900 (4efab99)
+++ test/command/suite/select/function/snippet/max_results.expected    2016-05-24 23:47:51 +0900 (221a3fe)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "SQL", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/no_normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/no_normalizer.expected    2016-05-24 23:29:34 +0900 (719ccf1)
+++ test/command/suite/select/function/snippet/no_normalizer.expected    2016-05-24 23:47:51 +0900 (c65b56c)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "sql", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/normalizer.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/normalizer.expected    2016-05-24 23:29:34 +0900 (790ca12)
+++ test/command/suite/select/function/snippet/normalizer.expected    2016-05-24 23:47:51 +0900 (f645ac8)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "sql", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/prefix.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/prefix.expected    2016-05-24 23:29:34 +0900 (9674a26)
+++ test/command/suite/select/function/snippet/prefix.expected    2016-05-24 23:47:51 +0900 (36a0ee8)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "SQL", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/suffix.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/suffix.expected    2016-05-24 23:29:34 +0900 (9d44db9)
+++ test/command/suite/select/function/snippet/suffix.expected    2016-05-24 23:47:51 +0900 (d20e60e)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "SQL", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet/twice_keyword.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet/twice_keyword.expected    2016-05-24 23:29:34 +0900 (94db455)
+++ test/command/suite/select/function/snippet/twice_keyword.expected    2016-05-24 23:47:51 +0900 (daf1633)
@@ -22,7 +22,7 @@ select Entries   --output_columns '   snippet(content,   "SQL", "<span class=\\"
       [
         [
           "snippet",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/compressed.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/compressed.expected    2016-05-24 23:29:34 +0900 (863f343)
+++ test/command/suite/select/function/snippet_html/compressed.expected    2016-05-24 23:47:51 +0900 (d16e51b)
@@ -39,7 +39,7 @@ select Documents   --match_columns content --query 'mroonga MySQL'   --output_co
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/concat.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/concat.expected    2016-05-24 23:29:34 +0900 (e3579d5)
+++ test/command/suite/select/function/snippet_html/concat.expected    2016-05-24 23:47:51 +0900 (0a56402)
@@ -37,7 +37,7 @@ select Documents   --match_columns title||content --query 'groonga'   --output_c
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/empty_query.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/empty_query.expected    2016-05-24 23:29:34 +0900 (95dcfc1)
+++ test/command/suite/select/function/snippet_html/empty_query.expected    2016-05-24 23:47:51 +0900 (6ee03e1)
@@ -13,4 +13,4 @@ load --table Documents
 ]
 [[0,0.0,0.0],1]
 select Documents   --match_columns content --query ''   --output_columns 'snippet_html(content)'
-[[0,0.0,0.0],[[[1],[["snippet_html","null"]],[null]]]]
+[[0,0.0,0.0],[[[1],[["snippet_html",null]],[null]]]]

  Modified: test/command/suite/select/function/snippet_html/empty_text.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/empty_text.expected    2016-05-24 23:29:34 +0900 (8712f3b)
+++ test/command/suite/select/function/snippet_html/empty_text.expected    2016-05-24 23:47:51 +0900 (e8b5ef1)
@@ -13,4 +13,4 @@ load --table Documents
 ]
 [[0,0.0,0.0],1]
 select Documents   --match_columns content --query 'Groonga'   --output_columns 'snippet_html("")'
-[[0,0.0,0.0],[[[1],[["snippet_html","null"]],[null]]]]
+[[0,0.0,0.0],[[[1],[["snippet_html",null]],[null]]]]

  Modified: test/command/suite/select/function/snippet_html/first.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/first.expected    2016-05-24 23:29:34 +0900 (3f97c30)
+++ test/command/suite/select/function/snippet_html/first.expected    2016-05-24 23:47:51 +0900 (8332a1f)
@@ -30,7 +30,7 @@ select Entries   --output_columns 'snippet_html(title), title, content'   --matc
       [
         [
           "snippet_html",
-          "null"
+          null
         ],
         [
           "title",

  Modified: test/command/suite/select/function/snippet_html/more.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/more.expected    2016-05-24 23:29:34 +0900 (82e7a46)
+++ test/command/suite/select/function/snippet_html/more.expected    2016-05-24 23:47:51 +0900 (7ab9a9e)
@@ -39,7 +39,7 @@ select Documents   --match_columns content --query 'groonga'   --output_columns
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/none.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/none.expected    2016-05-24 23:29:34 +0900 (e25d450)
+++ test/command/suite/select/function/snippet_html/none.expected    2016-05-24 23:47:51 +0900 (7654328)
@@ -31,7 +31,7 @@ select Documents   --match_columns content --query 'MySQL'   --output_columns '_
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/one.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/one.expected    2016-05-24 23:29:34 +0900 (a3cc69f)
+++ test/command/suite/select/function/snippet_html/one.expected    2016-05-24 23:47:51 +0900 (0babdc2)
@@ -39,7 +39,7 @@ select Documents   --match_columns content --query 'mroonga MySQL'   --output_co
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/second.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/second.expected    2016-05-24 23:29:34 +0900 (42bfe35)
+++ test/command/suite/select/function/snippet_html/second.expected    2016-05-24 23:47:51 +0900 (e6542bd)
@@ -34,7 +34,7 @@ select Entries   --output_columns 'title, snippet_html(title), content'   --matc
         ],
         [
           "snippet_html",
-          "null"
+          null
         ],
         [
           "content",

  Modified: test/command/suite/select/function/snippet_html/third.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/snippet_html/third.expected    2016-05-24 23:29:34 +0900 (6e04615)
+++ test/command/suite/select/function/snippet_html/third.expected    2016-05-24 23:47:51 +0900 (edb287d)
@@ -38,7 +38,7 @@ select Entries   --output_columns 'title, content, snippet_html(title)'   --matc
         ],
         [
           "snippet_html",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/snippet_html/twice.expected (+2 -2)
===================================================================
--- test/command/suite/select/function/snippet_html/twice.expected    2016-05-24 23:29:34 +0900 (a43a333)
+++ test/command/suite/select/function/snippet_html/twice.expected    2016-05-24 23:47:51 +0900 (b04418b)
@@ -30,11 +30,11 @@ select Entries   --output_columns 'snippet_html(title), snippet_html(content), t
       [
         [
           "snippet_html",
-          "null"
+          null
         ],
         [
           "snippet_html",
-          "null"
+          null
         ],
         [
           "title",

  Modified: test/command/suite/select/function/string/string_length/ascii.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/string/string_length/ascii.expected    2016-05-24 23:29:34 +0900 (e23fc56)
+++ test/command/suite/select/function/string/string_length/ascii.expected    2016-05-24 23:47:51 +0900 (3f2ddb3)
@@ -26,7 +26,7 @@ select Memos   --output_columns '_key, string_length(_key)'
         ],
         [
           "string_length",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/string/string_length/invalid.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/string/string_length/invalid.expected    2016-05-24 23:29:34 +0900 (964d847)
+++ test/command/suite/select/function/string/string_length/invalid.expected    2016-05-24 23:47:51 +0900 (d6ce458)
@@ -29,7 +29,7 @@ select Ages   --output_columns '_key, string_length(_key)'
         ],
         [
           "string_length",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/string/string_length/multibyte.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/string/string_length/multibyte.expected    2016-05-24 23:29:34 +0900 (dcfaf47)
+++ test/command/suite/select/function/string/string_length/multibyte.expected    2016-05-24 23:47:51 +0900 (34b0cd0)
@@ -26,7 +26,7 @@ select Memos   --output_columns '_key, string_length(_key)'
         ],
         [
           "string_length",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_day/valid.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_day/valid.expected    2016-05-24 23:29:34 +0900 (6491639)
+++ test/command/suite/select/function/time/time_classify_day/valid.expected    2016-05-24 23:47:51 +0900 (b53d5ea)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_day",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_hour/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_hour/default.expected    2016-05-24 23:29:34 +0900 (2750dab)
+++ test/command/suite/select/function/time/time_classify_hour/default.expected    2016-05-24 23:47:51 +0900 (40afbcb)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_hour",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_hour/interval.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_hour/interval.expected    2016-05-24 23:29:34 +0900 (bbafdc6)
+++ test/command/suite/select/function/time/time_classify_hour/interval.expected    2016-05-24 23:47:51 +0900 (5b74d22)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_hour",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_minute/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_minute/default.expected    2016-05-24 23:29:34 +0900 (49ef35a)
+++ test/command/suite/select/function/time/time_classify_minute/default.expected    2016-05-24 23:47:51 +0900 (5fd25ef)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_minute",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_minute/interval.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_minute/interval.expected    2016-05-24 23:29:34 +0900 (62c4ad9)
+++ test/command/suite/select/function/time/time_classify_minute/interval.expected    2016-05-24 23:47:51 +0900 (5dc41d8)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_minute",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_month/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_month/default.expected    2016-05-24 23:29:34 +0900 (8ec89e3)
+++ test/command/suite/select/function/time/time_classify_month/default.expected    2016-05-24 23:47:51 +0900 (cbabe64)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_month",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_month/interval.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_month/interval.expected    2016-05-24 23:29:34 +0900 (82584b5)
+++ test/command/suite/select/function/time/time_classify_month/interval.expected    2016-05-24 23:47:51 +0900 (e7365bd)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_month",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_second/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_second/default.expected    2016-05-24 23:29:34 +0900 (8410799)
+++ test/command/suite/select/function/time/time_classify_second/default.expected    2016-05-24 23:47:51 +0900 (19486a8)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_second",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_second/interval.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_second/interval.expected    2016-05-24 23:29:34 +0900 (e6033ae)
+++ test/command/suite/select/function/time/time_classify_second/interval.expected    2016-05-24 23:47:51 +0900 (3ccf7f5)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_second",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_week/not_underflowed.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_week/not_underflowed.expected    2016-05-24 23:29:34 +0900 (c22f9f1)
+++ test/command/suite/select/function/time/time_classify_week/not_underflowed.expected    2016-05-24 23:47:51 +0900 (df9a609)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_week",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_week/underflow_month.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_week/underflow_month.expected    2016-05-24 23:29:34 +0900 (e599043)
+++ test/command/suite/select/function/time/time_classify_week/underflow_month.expected    2016-05-24 23:47:51 +0900 (faafc0c)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_week",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_week/underflow_year.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_week/underflow_year.expected    2016-05-24 23:29:34 +0900 (476a24f)
+++ test/command/suite/select/function/time/time_classify_week/underflow_year.expected    2016-05-24 23:47:51 +0900 (2af8eb5)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_week",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_year/default.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_year/default.expected    2016-05-24 23:29:34 +0900 (a6a9b1d)
+++ test/command/suite/select/function/time/time_classify_year/default.expected    2016-05-24 23:47:51 +0900 (54e6cc7)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_year",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/time/time_classify_year/interval.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/time/time_classify_year/interval.expected    2016-05-24 23:29:34 +0900 (05aff46)
+++ test/command/suite/select/function/time/time_classify_year/interval.expected    2016-05-24 23:47:51 +0900 (33aca89)
@@ -31,7 +31,7 @@ select Timestamps   --sortby _id   --limit -1   --output_columns '_key, time_cla
         ],
         [
           "time_classify_year",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/vector/vector_size/reference_vector.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/vector/vector_size/reference_vector.expected    2016-05-24 23:29:34 +0900 (5b0ffe4)
+++ test/command/suite/select/function/vector/vector_size/reference_vector.expected    2016-05-24 23:47:51 +0900 (91907c0)
@@ -32,7 +32,7 @@ select Memos   --output_columns 'tags, vector_size(tags)'
         ],
         [
           "vector_size",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/function/vector/vector_size/vector.expected (+1 -1)
===================================================================
--- test/command/suite/select/function/vector/vector_size/vector.expected    2016-05-24 23:29:34 +0900 (9f3877a)
+++ test/command/suite/select/function/vector/vector_size/vector.expected    2016-05-24 23:47:51 +0900 (e244242)
@@ -30,7 +30,7 @@ select Memos   --output_columns 'tags, vector_size(tags)'
         ],
         [
           "vector_size",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/output_columns/expression/addition.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/addition.expected    2016-05-24 23:29:34 +0900 (30de4da)
+++ test/command/suite/select/output_columns/expression/addition.expected    2016-05-24 23:47:51 +0900 (170be11)
@@ -6,4 +6,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users --output_columns "_key, 10 + _id + 5"
-[[0,0.0,0.0],[[[1],[["_key","ShortText"],["","null"]],["alice",16]]]]
+[[0,0.0,0.0],[[[1],[["_key","ShortText"],["",null]],["alice",16]]]]

  Modified: test/command/suite/select/output_columns/expression/division.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/division.expected    2016-05-24 23:29:34 +0900 (3214ccc)
+++ test/command/suite/select/output_columns/expression/division.expected    2016-05-24 23:47:51 +0900 (9e9b92f)
@@ -6,4 +6,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users --output_columns "_key, 10 / _id / 5"
-[[0,0.0,0.0],[[[1],[["_key","ShortText"],["","null"]],["alice",2]]]]
+[[0,0.0,0.0],[[[1],[["_key","ShortText"],["",null]],["alice",2]]]]

  Modified: test/command/suite/select/output_columns/expression/literal/string/double_quote.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/literal/string/double_quote.expected    2016-05-24 23:29:34 +0900 (81b46cc)
+++ test/command/suite/select/output_columns/expression/literal/string/double_quote.expected    2016-05-24 23:47:51 +0900 (ae0db7d)
@@ -26,7 +26,7 @@ select Entries   --output_columns '_id, "double quoted" + " " + "string value"'
         ],
         [
           "",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/output_columns/expression/literal/string/single_quote.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/literal/string/single_quote.expected    2016-05-24 23:29:34 +0900 (fa2d00f)
+++ test/command/suite/select/output_columns/expression/literal/string/single_quote.expected    2016-05-24 23:47:51 +0900 (9528947)
@@ -26,7 +26,7 @@ select Entries   --output_columns "_id, 'single quoted' + ' ' + 'string value'"
         ],
         [
           "",
-          "null"
+          null
         ]
       ],
       [

  Modified: test/command/suite/select/output_columns/expression/multiplication.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/multiplication.expected    2016-05-24 23:29:34 +0900 (4f51d93)
+++ test/command/suite/select/output_columns/expression/multiplication.expected    2016-05-24 23:47:51 +0900 (4cecacf)
@@ -6,4 +6,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users --output_columns "_key, 10 * _id * 5"
-[[0,0.0,0.0],[[[1],[["_key","ShortText"],["","null"]],["alice",50]]]]
+[[0,0.0,0.0],[[[1],[["_key","ShortText"],["",null]],["alice",50]]]]

  Modified: test/command/suite/select/output_columns/expression/string_plus.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/string_plus.expected    2016-05-24 23:29:34 +0900 (9b02dec)
+++ test/command/suite/select/output_columns/expression/string_plus.expected    2016-05-24 23:47:51 +0900 (1e2e20d)
@@ -8,4 +8,4 @@ load --table Entries
 ]
 [[0,0.0,0.0],1]
 select Entries   --output_columns '_id, "<" + title + ">"'
-[[0,0.0,0.0],[[[1],[["_id","UInt32"],["","null"]],[1,"<groonga and MySQL>"]]]]
+[[0,0.0,0.0],[[[1],[["_id","UInt32"],["",null]],[1,"<groonga and MySQL>"]]]]

  Modified: test/command/suite/select/output_columns/expression/subtraction.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/expression/subtraction.expected    2016-05-24 23:29:34 +0900 (b87fbc9)
+++ test/command/suite/select/output_columns/expression/subtraction.expected    2016-05-24 23:47:51 +0900 (a6c6c51)
@@ -6,4 +6,4 @@ load --table Users
 ]
 [[0,0.0,0.0],1]
 select Users --output_columns "_key, 10 - _id - 5"
-[[0,0.0,0.0],[[[1],[["_key","ShortText"],["","null"]],["alice",4]]]]
+[[0,0.0,0.0],[[[1],[["_key","ShortText"],["",null]],["alice",4]]]]

  Modified: test/command/suite/select/output_columns/function_call.expected (+1 -1)
===================================================================
--- test/command/suite/select/output_columns/function_call.expected    2016-05-24 23:29:34 +0900 (bcb657a)
+++ test/command/suite/select/output_columns/function_call.expected    2016-05-24 23:47:51 +0900 (329573c)
@@ -30,7 +30,7 @@ select Users   --output_columns '_key, name, edit_distance(name, "alice")'
         ],
         [
           "edit_distance",
-          "null"
+          null
         ]
       ],
       [
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