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Connected to mysql instance ONCE or TWICE?

开发者 https://www.devze.com 2022-12-08 17:01 出处:网络
I was wo开发者_Go百科ndering whether the following command (from a .bat script): (1) connects to the mysql instance once and then executes script#1 followed by script#2, or (2) does it reconnect for

I was wo开发者_Go百科ndering whether the following command (from a .bat script):

(1) connects to the mysql instance once and then executes script#1 followed by script#2, or (2) does it reconnect for each of the sql scripts?

mysql -B -b -h%HOST% -u%USER% -p%PASSWORD% %SCHEMA% < "scripts\create_and_populate.sql" < "scripts\update_joomla_article.sql"

I have a bad feeling it reconnects. If so, how would I go about changing the .bat script to execute one sql script after another without reconnecting. Cheers :)


Edit:

I only found out recently, to my great shame :-Z, that this command does not actually work as I expected.

mysql ... < script1 < script2 < script3 appeared to work at first, until I spotted that only the last script in the chain is actually executed. Still, I will welcome any suggestions as to How to get this done in a different way that what Colin Pickard suggested.


You could maybe use a couple of scripts with SELECT CONNECTION_ID( ); to determine your theory, and then something like this:

copy scripts\create_and_populate.sql+scripts\update_joomla_article.sql scripts\temp\create_update.sql
mysql -B -b -h%HOST% -u%USER% -p%PASSWORD% %SCHEMA% < "scripts\temp\create_update.sql"
del scripts\temp\create_update.sql

(WARNING: I have not tested that! try it out first!)


one more suggestion, does this work?

mysql -e script1 -e script2 -e script3
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