在shell腳本中使用GNU並行執行多個mysql腳本並行

Question

我有一個shell腳本，它具有多個加載數據語句，可以將來自csv文件的數據加載到MySQL中的表中。如何使用GNU Parallel並行執行這些語句？

我的shell腳本是這樣的：

#!/bin/bash 

mysql --defaults-extra-file=config.cnf -e "SELECT * 
FROM table1 
INTO OUTFILE '$path/table1.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';" 

mysql --defaults-extra-file=config.cnf -e "SELECT * 
FROM table2 
INTO OUTFILE '$path/table2.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';" 

mysql --defaults-extra-file=config.cnf -e "SELECT * 
FROM table3 
INTO OUTFILE '$path/table3.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';" 

echo "END of script" 

Answer 1

doit() { 
    table="$1" 
    tablepath="$2" 
    mysql --defaults-extra-file=config.cnf -e "SELECT * 
    FROM $table 
    INTO OUTFILE '$tablepath' FIELDS TERMINATED BY ',' ENCLOSED BY '\"' LINES TERMINATED BY '\n';" 
} 
export -f doit 
parallel doit {/.} {} ::: path/table*.csv