nssalian commented on code in PR #2045:
URL: https://github.com/apache/iceberg-go/pull/2045#discussion_r4077112644
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website/src/expression-dsl.md:
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@@ -56,6 +56,7 @@ A *term* is the left-hand side of a predicate. Iceberg-go has
two flavors:
- `Reference("column_name")` - an unbound term that names a column
(`exprs.go:373`). Typing happens at bind time, when the expression is matched
against a schema. This is what you almost always want.
- `BoundReference` - the resolved form, produced by `Reference.Bind(schema,
caseSensitive)` (`exprs.go:389`). You only encounter these when writing custom
expression visitors.
+- `Extract(ref, path, type)` - a variant sub-path term that navigates a dotted
JSONPath into a `variant` column and casts the leaf to `type`
(`variant_extract.go`). Use it inside any predicate builder to filter on a
field within a variant. See [Row Filter
Syntax](./row-filter-syntax.md#variant-extraction).
Review Comment:
Done, both spots (this bullet and the table row) now use `typ`.
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