Implemented DECLARE support for variables and cursors #1440
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This adds support for
DECLARE
variables and cursors. I implemented nesting support by giving all variables a procedure-unique ID, with the scope determining which ID is resolved. A flat slice of IDs are far simpler to track than a proper tree structure.I did skip one test for GMS, as a
RowIter
reads the current state of the table, rather than the state that theRowIter
generated with.