SQL Transform with VARIABLE

Question

Hello!
I have the SQL Transform with global variable.
First, I have a script for iniciality the variable:
$DATE_CUST= to_date('2011/11/15 00:00:00.000','YYYY/MM/DD HH24:MI:SS.FF');
I print the variable, in the execution write:
2800     896     PRINTFN     2011.11.15 00:00:00.000000000
STEP in SQL Transforms: 
1.  SELECT * FROM TABLE_CUSTOMER
2.  PUSH the update Schema button
3.  add the where clause:  WHERE DATE_CUSTOMER > [$DATE_CUST]
4.  save the DataFlow.
When the execute the job, But we got error...  The variable is null or empty
In the log trace: 
|Data flow DF_VAR|Reader SQL
SELECT query <select * from TABLE_CUSTOMER
WHERE DATE_CUSTOMER  > 
The database error message is <Sybase SQL Server <CRMGCPSA> error message for operation <ct_results>: <Sybase ASE Server message number <102> State <1> Severity <15> From Server <ASEDWHD>:   Message Text is: Incorrect syntax near ')'.
>.
Why no have value the variable ?
The script correct should be
SELECT query <select * from TABLE_CUSTOMER
WHERE DATE_CUSTOMER  >  2011.11.15 00:00:00.000000000

Answer 1

Both braces and square brackets can be used to reference variables, however they behave slightly differently.
suppose I have the following hard-coded SQL statement
select * from al_funcinfo where name = 'avg'
Now I want to make it dynamic, I can use a variable and some square brackets
select * from al_funcinfo where name = '[$G_Name]'
or braces
select * from al_funcinfo where name = {$G_Name}
As you can see, braces adds single quotes around the varible value.  It is very useful when constructing complex statements requiring string values to be delimited with quotes (as most SQL DBs do).  These variable interpolation techniques can be used in scripts.
M