`UPDATE [FROM <alias>] [ON <key>] [RANDOM] REPLACE <f1> WITH <x1>
[, <fN> WITH <xN>]` becomes a preprocessor rewrite to a new RTL
primitive __dbUpdate. For each detail record, find the master
record with matching key (forward-walk if both sorted, full scan
when RANDOM) and apply the REPLACE clauses in master's context.
Same shape as harbour-core/src/rdd/dbupdat.prg. The REPLACE clauses
expand to comma-separated assignments inside one block —
`{|| _FIELD->total := del->amt, _FIELD->status := "OK" }` — using
the multi-pair `[, <fN> WITH <xN>]` optional-repeat that std.ch
already establishes for SUM and DEFAULT.
Five-specific tweak: ON <key> wraps as `{|| _FIELD-><key> }` rather
than Harbour's bare `<{key}>`. Five doesn't auto-resolve a bare
identifier in a code block to the current workarea's field, and the
UPDATE block must evaluate against both detail and master so an
explicit alias prefix won't do — _FIELD-> dispatches to whichever
area is selected at eval time, which is what's needed.
Wiring up UPDATE surfaced one further matchSegment gap that fell
out of the multi-pair `[REPLACE ... [, ...]]` shape:
* matchSegment didn't handle nested `[...]` inside its body.
`[REPLACE <f1> WITH <x1> [, <fN> WITH <xN>]]` gave the inner
`[` as a literal token to match against the line, so even the
single-pair `REPLACE total WITH del->amt` form failed and f1/x1
came back empty. Now matchSegment runs the same repeat-loop on
inner `[...]` blocks that the top-level matcher uses, with its
own outer-tail computed from the segment tail past the inner
`]`.
Parser cleanup: UPDATE removed from the IDENT-statement no-op switch.
Gates green:
go test ./... : PASS
FiveSql2 SQL:1999 : 43/43
Harbour compat : 56/56
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
CharlesKWON
80a18daf8d