WIP test: add columns[NAME].stage test case without cache

When the value of --columns[NAME].stage parameter is changed, Groonga
returns result without using cache.

test/command/suite/sharding/logical_select/cache/columns/stage.expected

@@ -0,0 +1,38 @@
+plugin_register sharding
+[[0,0.0,0.0],true]
+plugin_register functions/number
+[[0,0.0,0.0],true]
+table_create Logs_20170315 TABLE_NO_KEY
+[[0,0.0,0.0],true]
+column_create Logs_20170315 timestamp COLUMN_SCALAR Time
+[[0,0.0,0.0],true]
+column_create Logs_20170315 item COLUMN_SCALAR ShortText
+[[0,0.0,0.0],true]
+column_create Logs_20170315 price COLUMN_SCALAR UInt32
+[[0,0.0,0.0],true]
+table_create Logs_20170316 TABLE_NO_KEY
+[[0,0.0,0.0],true]
+column_create Logs_20170316 timestamp COLUMN_SCALAR Time
+[[0,0.0,0.0],true]
+column_create Logs_20170316 item COLUMN_SCALAR ShortText
+[[0,0.0,0.0],true]
+column_create Logs_20170316 price COLUMN_SCALAR UInt32
+[[0,0.0,0.0],true]
+load --table Logs_20170315
+[
+{"timestamp": "2017/03/15 00:00:00", "item": "Book", "price": 1000},
+{"timestamp": "2017/03/15 01:00:00", "item": "Pencil", "price": 100}
+]
+[[0,0.0,0.0],2]
+load --table Logs_20170316
+[
+{"timestamp": "2017/03/16 10:00:00", "item": "Note", "price": 520},
+{"timestamp": "2017/03/16 11:00:00", "item": "Pen", "price": 510},
+{"timestamp": "2017/03/16 11:00:00", "item": "Box", "price": 500}
+]
+[[0,0.0,0.0],3]
+logical_select Logs   --shard_key timestamp   --limit 0   --columns[content].stage initial   --columns[content].type ShortText   --columns[content].flags COLUMN_SCALAR   --columns[content].value 'snippet_html(item)'   --output_columns content   --query "Book"
+[[[-63,0.0,0.0],"syntax error: <constant is null>(-63)"]]
+#|e| constant is null
+logical_select Logs   --shard_key timestamp   --limit 0   --columns[content].stage filtered   --columns[content].type ShortText   --columns[content].flags COLUMN_SCALAR   --columns[content].value 'snippet_html(item)'   --output_columns content   --query "Book"
+[[[-63,0.0,0.0],"syntax error: <constant is null>(-63)"]]

test/command/suite/sharding/logical_select/cache/columns/stage.test

@@ -0,0 +1,48 @@
+#@on-error omit
+plugin_register sharding
+#@on-error default
+
+plugin_register functions/number
+
+table_create Logs_20170315 TABLE_NO_KEY
+column_create Logs_20170315 timestamp COLUMN_SCALAR Time
+column_create Logs_20170315 item COLUMN_SCALAR ShortText
+column_create Logs_20170315 price COLUMN_SCALAR UInt32
+
+table_create Logs_20170316 TABLE_NO_KEY
+column_create Logs_20170316 timestamp COLUMN_SCALAR Time
+column_create Logs_20170316 item COLUMN_SCALAR ShortText
+column_create Logs_20170316 price COLUMN_SCALAR UInt32
+
+load --table Logs_20170315
+[
+{"timestamp": "2017/03/15 00:00:00", "item": "Book", "price": 1000},
+{"timestamp": "2017/03/15 01:00:00", "item": "Pencil", "price": 100}
+]
+
+load --table Logs_20170316
+[
+{"timestamp": "2017/03/16 10:00:00", "item": "Note", "price": 520},
+{"timestamp": "2017/03/16 11:00:00", "item": "Pen", "price": 510},
+{"timestamp": "2017/03/16 11:00:00", "item": "Box", "price": 500}
+]
+
+logical_select Logs \
+  --shard_key timestamp \
+  --limit 0 \
+  --columns[content].stage initial \
+  --columns[content].type ShortText \
+  --columns[content].flags COLUMN_SCALAR \
+  --columns[content].value 'snippet_html(item)' \
+  --output_columns content \
+  --query "Book"
+
+logical_select Logs \
+  --shard_key timestamp \
+  --limit 0 \
+  --columns[content].stage filtered \
+  --columns[content].type ShortText \
+  --columns[content].flags COLUMN_SCALAR \
+  --columns[content].value 'snippet_html(item)' \
+  --output_columns content \
+  --query "Book"