NTX Bulk Build (build.go — ported from rddfive/ntx_engine.c):
- pageBuffer: dynamic memory buffer for all pages
- Phase 1: Build leaf pages in sequential memory (zero disk I/O)
- Phase 2: Build interior levels from cached leaf data (zero I/O)
- Separator promotion: remove last key from leaf only (not interior)
- Single bulk WriteAt for all pages at end
- INDEX ON 10K: 34ms → 5-8ms (4-6x improvement)
NTX Seek (ntx.go):
- Always descend to leaf on match (find first occurrence)
- fStop flag tracks path match, verified at leaf
APPEND Buffering (dbf.go):
- Append marks dirty without immediate disk write
- flushRecord writes record data only (no header/EOF per record)
- Close/Flush writes EOF marker + header once
Results: 14 packages ALL PASS, 82/82 stress test
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Bug 1: FIELD->NAME in INDEX ON expression
- evalKeyExprInner: strip FIELD->/alias-> prefix before field lookup
- exprToString: handle AliasExpr (FIELD->NAME → "FIELD->NAME")
Bug 2: AsNumInt() on Double returned IEEE 754 raw bits
- Value.AsNumInt(): check tDouble and convert via Float64frombits
- Fixed array index crash when index is result of % modulo
Bug 3: PACK/ZAP crash with open indexes
- OrderListRebuild: fully implemented (was TODO stub)
Saves index info, closes all, sets idxState=nil, recreates
- OrderCreate: set current=-1 during key evaluation (natural GoTo)
- PACK/ZAP: save/restore idxState, rebuild after operation
- Register __DBPACK, __DBZAP, DBRECALL symbol aliases
Harbour vs Five: 45/47 match (96%), 2 diffs are duplicate-key sort order
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- skipFilter: skip deleted records in GoTop/GoBottom/Skip when SET DELETED ON
- hbrdd.IsSetDeleted callback: avoids circular import hbrdd→hbrtl
- Parser: capture ON/OFF for boolean SET commands (DELETED, EXACT, SOFTSEEK, etc.)
- Parser: capture TO expr for SET DATE/DECIMALS/EPOCH
- Gengo: emit proper t.Do() calls for 11 SET toggles + 3 value SETs
- stmtSet: was stub (skipToEOL), now calls parseSet()
- RTL: register 11 SET toggle functions (SETDELETED, SETEXACT, etc.)
- RTL: DBLOCATE/DBCONTINUE for sequential search
- RTL: DBSETFILTER/DBCLEARFILTER/DBFILTER
- PadL/PadR: support 3rd param fill character
- Area interface: added SetFound, SetLocate, LocateBlock, filter methods
- MemRDD: implements new Area interface methods
- Comprehensive PRG test: test_search.prg (7 test suites all pass)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
