MySQL 通過SUBSTRING_INDEX函式拆分字串為陣列單元

feelpurple發表於2016-10-08
MySqlIndex函式字串陣列
vim test.sh
#Define variables
MYSQL_HOME=/usr
SQL_SCRIPT_DB_CONNECTION_STRING='-uroot -p'root''
SQL_SCRIPT_PARAMETERS_LIST="'PARAM1 PARAM2 PARAM3'"

#Execute the command
#CMD_SQL_SCRIPT_EXECUTION=${MYSQL_HOME}/bin/mysql  ${SQL_SCRIPT_DB_CONNECTION_STRING} -e "set  @VAR1=$SQL_SCRIPT_PARAMETERS_LIST ; source ${SQL_SCRIPT_FILE_LOCATION}/${SQL_SCRIPT_NAME}.sql ;" >> ${myLogFile}

${MYSQL_HOME}/bin/mysql  ${SQL_SCRIPT_DB_CONNECTION_STRING} -e "set  @VAR=$SQL_SCRIPT_PARAMETERS_LIST;
set @VAR_NUM=length(@VAR)-length(REPLACE(@VAR,' ',''))+1; /* define the total number of the variables  */
set @VAR_POS=0; /* define the variable position in the string */
/* define the variables' value, if the the variable doesn't exist, its value is null  */
set @VAR_1 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_2 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_3 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_4 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_5 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_6 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
set @VAR_7 = if(@VAR_POS < @VAR_NUM,SUBSTRING_INDEX(SUBSTRING_INDEX(@VAR, ' ', @VAR_POS:=@VAR_POS+1),' ',-1),null);
select @VAR_1, @VAR_2, @VAR_3, @VAR_4, @VAR_5, @VAR_6, @VAR_7;"

sh test.sh
Warning: Using a password on the command line interface can be insecure.
+--------+--------+--------+--------+--------+--------+--------+
| @VAR_1 | @VAR_2 | @VAR_3 | @VAR_4 | @VAR_5 | @VAR_6 | @VAR_7 |
+--------+--------+--------+--------+--------+--------+--------+
| PARAM1 | PARAM2 | PARAM3 | NULL   | NULL   | NULL   | NULL   |
+--------+--------+--------+--------+--------+--------+--------+

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/26506993/viewspace-2125937/，如需轉載，請註明出處，否則將追究法律責任。

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