b2c01b1286
Aggregate functions like array_agg and string_agg will return NULL instead of empty arrays and empty strings resp. when run on zero rows. This change reflects that in the haskell types. It also adds a "maybeArray" function that coalesces NULL into an empty array, because currently there is no way to write an empty array literal (`val []` does not work) |
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| MySQL | ||
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| SQLite | ||