[8,9,10]
['a','b','c']
CREATE TABLE default.table_for_rename_nested\n(\n    `date` Date,\n    `key` UInt64,\n    `n.x` Array(UInt32),\n    `n.y` Array(String),\n    `value1` Array(Array(LowCardinality(String)))\n)\nENGINE = MergeTree()\nPARTITION BY date\nORDER BY key\nSETTINGS index_granularity = 8192
CREATE TABLE default.table_for_rename_nested\n(\n    `date` Date,\n    `key` UInt64,\n    `n.renamed_x` Array(UInt32),\n    `n.renamed_y` Array(String),\n    `value1` Array(Array(LowCardinality(String)))\n)\nENGINE = MergeTree()\nPARTITION BY date\nORDER BY key\nSETTINGS index_granularity = 8192
7	[8,9,10]
7	['a','b','c']
[['7']]
CREATE TABLE default.table_for_rename_nested\n(\n    `date` Date,\n    `key` UInt64,\n    `n.renamed_x` Array(UInt32),\n    `n.renamed_y` Array(String),\n    `renamed_value1` Array(Array(LowCardinality(String)))\n)\nENGINE = MergeTree()\nPARTITION BY date\nORDER BY key\nSETTINGS index_granularity = 8192
date	key	n.renamed_x	n.renamed_y	renamed_value1
2019-10-01	7	[8,9,10]	['a','b','c']	[['7']]