在 ClickHouse db 中通过 CSV 格式插入字符串数组

Question

我有一个简单的table:

CREATE TABLE t1
(
    v1 Int32, 
    a1 Array(Int32), 
    s2 Array(String)
) ENGINE = Memory

但不知道如何插入字符串数组：

insert into t1 format CSV 1,"[1,2]","[a1,a2]"

失败并出现以下错误：

Exception on client:
Code: 26. DB::Exception: Cannot parse quoted string: expected opening     quote: 
Could not print diagnostic info because two last rows aren't in    buffer (rare case)
: (at row 1)

Answer 1

抱歉，重新阅读文档，发现数组中的字符串应该用单引号括起来。

 insert into t1 format CSV 1,"[1,2]","['a1','a2']"

Answer 2

如果它能帮助到这里的任何人，导入数组列有一些 non-standard CSV 要求，也包括对象映射列。

数组：[]

空条目或单个条目未加引号：[] 或 [75]
多个条目用引号括起来：“[6,73,74]”

对象：{}

整数键总是不带引号
字符串键总是单引号
填充对象 {} 被引号包裹：“{95:26}”或“{'a':26}”

desc	arrField	arrdesc	objField	objDesc
empty	[]	no quotes	{}	no quotes
single int key	[10]	no quotes	"{10:20}"	wrap in "
single str key	['ten']	single quote	"{'ten':20}"	' (key) and wrap in "
single str key val			"{'ten':'twenty'}"	' (key and val) and wrap in "
multi arr/ob	"[6,73,74]"	wrap in "	"{6:6,73:8,74:4}"	wrap in "

示例 CSV raw - 注意缺少双引号。

one,two,three
[75],"{95:26}","{'a':66}"
[75],"{75:2}",{}
"[6,73,74]","{6:6,73:8,74:4}","{'a':8,'b':9,'c':6}"
"[340,272,205]","{340:2,272:2,205:2,206:2,208:2,141:2,142:4}","{'a':7}"
[204],"{204:2}",{}
"[142,141,73]","{142:2,141:4,73:4}","{'a':2,'b':4}"
[74],"{74:20}","{'a':36}"
"[5,74,73]","{5:2,74:10,73:8}","{'a':17}"

在 ClickHouse db 中通过 CSV 格式插入字符串数组

Inserting String Array through CSV format in ClickHouse db

clickhouse

数组：[]

对象：{}