handle user variables in load data #2656
Merged
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This PR adds support for assigning user variables within a
LOAD DATA
query, and referencing user variables withing an expression forSET
clauses within the sameLOAD DATA
query.Additionally, this PR refactors much of the
LOAD DATA
code.We also moved
GetField
indexing out of iterator and into analyzerfixes: dolthub/dolt#8307