What is the meaning $, $$, $$$ in Informatica
$ refers Session Parameters like $source,$target.
$$ refers Mapping Parameters like $$State,$$Time.
$$$ refers System Parameters like $$$SessStartTime.
Actually $ means internal Parameter/Variable (such as $DBConnection prefix or $PMSessionLogDir) whereas $$ are used for user-defined parameters or variables (which could be defined at mapping or workflow/worklet level).
You can declare and use variables and parameters starting with $$ You can override and use pre-defined parameters starting with $PM* (i.e. $PMSessionLogDir, $PMWorkflowLogCount) You can use without declaration parameters following predefined templates (i.e. $InputFile, $DBConnection, etc.).
$ refers Session Parameters like $source,$target.
$$ refers Mapping Parameters like $$State,$$Time.
$$$ refers System Parameters like $$$SessStartTime.
Actually $ means internal Parameter/Variable (such as $DBConnection prefix or $PMSessionLogDir) whereas $$ are used for user-defined parameters or variables (which could be defined at mapping or workflow/worklet level).
You can declare and use variables and parameters starting with $$ You can override and use pre-defined parameters starting with $PM* (i.e. $PMSessionLogDir, $PMWorkflowLogCount) You can use without declaration parameters following predefined templates (i.e. $InputFile, $DBConnection, etc.).
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