public static interface SqlWriter.Frame
Every frame has a beginning, a series of clauses and separators, and an end. A typical frame is a comma-separated list. It begins with a "(", consists of expressions separated by ",", and ends with a ")".
A select statement is also a kind of frame. The beginning and end are are empty strings, but it consists of a sequence of clauses. "SELECT", "FROM", "WHERE" are separators.
A frame is current between a call to one of the
SqlWriter.startList(java.lang.String, java.lang.String) methods and the call to
SqlWriter.endList(Frame). If other code starts a frame in the mean
time, the sub-frame is put onto a stack.
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