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ftParadoxOle

ftParadoxOle = 19

Example​

function IsLegacyParadoxOLE(Field: TField): Boolean;
begin
  Result := Field.DataType = ftParadoxOle;
end;

Usage​

ftParadoxOle identifies legacy Paradox OLE large-object metadata that Velox handles as opaque blob content.

Additional Technical Info​

ftParadoxOle is declaration ordinal 19 of TFieldType. It labels an embedded OLE value from legacy Paradox storage. It does not create a COM/OLE object or make the stored content trustworthy.

The installed RTL maps this member to TBlobField and treats it as base ftBlob for compatibility checks. Read and write it as opaque bytes through the dataset's blob stream unless the originating Paradox schema and object format are known. The enum supplies no embedded-application identity, container version or portable conversion contract.

Legacy embedded objects can depend on unavailable applications, proprietary serialization and platform-specific behavior. Preserve source bytes during archival or migration, record their origin/content type separately, and use a deliberately isolated converter if interpretation is required. Do not activate untrusted OLE content as part of ordinary mapping.

New designs should use an explicit content type and a documented portable payload. Use ftBlob for generic binary LOB semantics; retain this member only for genuine provider compatibility.

The example only inspects metadata and was source-reviewed; no OLE activation, Paradox, blob, dataset, database, runtime or image test ran.

External references

Created 2026-07-15