Error when trying to insert values in Postgres query inside Bash script

问题

I'm executing the query as follows:

ssh user@XX.XX.1XX.XX "PGPASSWORD=myPassword psql -U psqlUser -h XX.XX.XX.XX -p 5432 -d myDB -c
'INSERT INTO table(\"CPU_IDLE_TIME\",\"TOTAL_SIZE\",\"USED_SIZE\",\"USED_STORAGE_P\") VALUES ($idlecputime,$totalSize,$usedSize,$usedStoragePercentage)';"

I obtain the values previous to this query doing snmpwalks. In order for the query to work the values have to be surrounded by single quotes (' '). I tried putting single quotes around the variable but everytime I get an error because the query is already surroundes by " ' ' ". I can't seem to find the configuration of quotes, or scaping quotes to make it work.

The variables are of type var char, integer and float.

One of the errores I get:

ERROR:  syntax error at or near ","

Thanks in advance for your help.

回答1:

Use printf to format the string for you

ssh user@XX.XX.1XX.XX "PGPASSWORD=myPassword psql -U psqlUser -h XX.XX.XX.XX -p 5432 -d myDB -c ""$(printf 'INSERT INTO table("CPU_IDLE_TIME","TOTAL_SIZE","USED_SIZE","USED_STORAGE_P") VALUES (%d, %d, %d, %d);' $idlecputime $totalSize $usedSize $usedStoragePercentage)"

The $( ) construct executes printf in a subshell.

来源：https://stackoverflow.com/questions/52939090/error-when-trying-to-insert-values-in-postgres-query-inside-bash-script