sql: handle single clause UPDATE ... SET for JSONB descriptors #83764
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* Introduce a tree.ColumnRef type that includes a column name and reference, similar to PG's definition. * Make this work for single SELECT statements for this commit only. Release note: None
This commit re-uses `json_set` to deal with array subscript assignments for JSON. Release note (sql change): Using JSONB style subscripts for UPDATE clauses (e.g. `UPDATE t SET j['a'] = 1, k['a'] = 2`) now works.
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otan
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Please see #77434 (comment).