有關如何在shell腳本

Question

我試圖執行此bash的代碼時，有一個問題中運行的黑斑羚殼：

function createImpalaPartition() { 

period_id=$1; 
database=$2 
node=$3 

actual_full=$(date -d@"$period_id" +%Y/%m/%d/%H/%M/) 
template="use c2d;create EXTERNAL TABLE exptopology_$period_id (child_id bigint,parent_id bigint,level INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' WITH SERDEPROPERTIES ('serialization.format'=',', 'field.delim'=',') STORED AS TEXTFILE LOCATION '/hfc/sip/service/topology/$actual_full'" 

echo "template is $template"; 
#impala-shell -V -i $node -d $database -q $template 
impala-shell -V -i $node -q $template 
} 

這是我如何調用它：

createImpalaPartition $actual $impalaDatabase $impalaNode 

其中

actual=$(date +'%s') 
impalaDatabase="dbName" 
impalaNode="name_of_the_node" 

該腳本的執行返回：

[core@dub-vcd-vms170 ~]$ createImpalaPartition $actual $impalaDatabase $impalaNode 
template is use c2d;create EXTERNAL TABLE exptopology_1428326587 (child_id bigint,parent_id bigint,level INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' WITH SERDEPROPERTIES ('serialization.format'=',', 'field.delim'=',') STORED AS TEXTFILE LOCATION '/hfc/sip/service/topology/2015/04/06/14/23/' 
Error, could not parse arguments "c2d;create EXTERNAL TABLE exptopology_1428326587 (child_id bigint,parent_id bigint,level INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' WITH SERDEPROPERTIES ('serialization.format'=',', 'field.delim'=',') STORED AS TEXTFILE LOCATION '/hfc/sip/service/topology/2015/04/06/14/23/'" 
Usage: impala_shell.py [options] 

正如你所看到的，我必須使用shell腳本創建表。

UPDATE：

下面這個link，我可以看到黑斑羚殼可以用這種方式，但我沒有使用正確的PARAMS。

我已經使用了-f而不是-q，同樣的錯誤依然存在。有人可以幫我嗎？

Answer 1

你需要引用的$template擴大爲整個字符串作爲單個參數進行處理，以impala-shell：

impala-shell -V -i $node "$template" 

其中-V啓用詳細輸出。對於非詳細（安靜）輸出，用-q替換-V。

Answer 2

最後我發現如何解決我的問題。

function createImpalaPartition() { 

period_id=$1; 
database=$2 
node=$3 

actual_full=$(date -d@"$period_id" +%Y/%m/%d/%H/%M/) 
#UC=$(impala-shell -r -q "select count(1) from table where condition=1" -d $DB -i $HOST -B) 
# attention, i have to use this way impala-shell 
impala-shell -V -i $node -d $database -q "create EXTERNAL TABLE exptopology_$period_id (child_id bigint,parent_id bigint,level INT) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' WITH SERDEPROPERTIES ('serialization.format'=',', 'field.delim'=',') STORED AS TEXTFILE LOCATION '/hfc/sip/service/topology/$actual_full'" 
} 

我不能使用模板var與create命令，我必須以這種方式傳遞命令。