Filter Rules
Filter strings must adhere to the following rules:
Field names can be fully qualified, such as:
struct_field.seq_field[2]
A character constant is a single character surrounded by single quotation marks. For example:
'A'
A string constant is zero or more characters surrounded by double quotation marks. For example:
"account"
If a character or string constant contains a single or double quotation mark, precede the quote with a backslash. For example:
'\"'
You can use parentheses to control the order of operator precedence.