Groovy GString issues

Question

I\'m want use $ macro in groovy GString. When i\'m wrote this code

[\'cdata\',\'tdata\'].each { def sql = \"select * from $it_1\" }

i\'m ge

Answer 1

You can use Groovy's Sql expand feature to help here. The following code will do the trick:

['cdata','tdata'].each {table -> def sql = "select * from ${Sql.expand table}_1" }

Using this method is particularly important if you have other parameters in your GString:

def name = 'Charlie Sheen'
def tables = ['normalPeople','crazyPeople']
tables.each { table -> 
    def sqlString = "select * from ${Sql.expand table} where name = ${name}"
    /* Execute SQL here */
}

In the example above a prepared statement will still be used, and the contents of the 'name' variable will still be handled as a parameter (thus helping to protect you against SQL injection attacks) but the table variable parameter will be expanded correctly.