Leave column agreement to the records that read DataType, name the text spelling beside a typed column read, and check a column after the columns it reads

2026-09-15 21:13:34 +02:00
parent f781fa47d1
commit acad25708a
6 changed files with 55 additions and 24 deletions
@@ -627,7 +627,8 @@ tokens add cost in proportion to the output.
  its columns from a struct instead, because a Go caller has already written that
  schema: the fields name the columns and their types are the datatypes, so a tag
  says only what to draw, and a `datatype` in it would be a second spelling of the
-  type.
+  type. The Go type is a struct column's one datatype, so its items need not agree on
+  one among themselves; each must only hold that type.
 - **A struct's records follow Go's field access, and compile on first use.** The
  fields an embedded struct promotes are the struct's own — `e.First`, as
  `encoding/json` and SQL mappers read them — so they are columns of its record and