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I'm looking to provide a case statement based on whether a substring is within a filename.
mysql_dumps/tpmysqldump-tps_dev_russell_development-information_schema-2014-03-26.sql
case $DUMPFILE in
*"tpdata"*)
database="tpdata";;
*"tpmrbs"*)
database="tpmrbs";;
*"information_schema"*)
database="information_schema";;
*"performance_schema"*)
database="performance_schema";;
*)
echo "INVALID FILE";;
esac
916
The short answer is yes, you can nest an if inside of swtich / case statement (or vice versa).
For small items with two outcomes, I typically use IIF statements (i.e. If x < a, then 1, else 0) but for longer drawn out statements that can have multiple outcomes, I use CASE.
The CASE statement is SQL's way of handling if/then logic. The CASE statement is followed by at least one pair of WHEN and THEN statements—SQL's equivalent of IF/THEN in Excel.
Method 1 - Using CHARINDEX() function This function is used to search for a specific word or a substring in an overall string and returns its starting position of match. In case no word is found, then it will return 0 (zero).
How do you initialize $DUMPFILE? If I run the following, the output is information_schema, which is what I expected...
#!/bin/bash
DUMPFILE=mysql_dumps/tpmysqldump-tps_dev_russell_development-information_schema-2014-03-26.sql
case $DUMPFILE in
*"tpdata"*)
database="tpdata";;
*"tpmrbs"*)
database="tpmrbs";;
*"information_schema"*)
database="information_schema";;
*"performance_schema"*)
database="performance_schema";;
*)
echo "INVALID FILE";;
esac
echo $database
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