HS.HC.DataType.SysEnvVarPlaceHolder
datatype class HS.HC.DataType.SysEnvVarPlaceHolder extends HS.HC.DataType.SysEnvVarName
ODBC Type: VARCHAR
Change control environment variable place holderParameters
parameter REGEX = \$\{(?!_)([a-zA-Z0-9_]+)(?<!_)\};
REGEX for place holder in the format of ${variableName},
where variableName is made up of alphanumeric characters and underscores, but does not start or end with an underscore.