INCLUDEUnder review

DBInfo.ch

#Include "DBInfo.ch"

Provides identifiers for record information, RDD capabilities, locks and table characteristics.

IncludesRDD and databaseHistorical referenceCompilation

01 · OVERVIEW

Overview

Provides identifiers for record information, RDD capabilities, locks and table characteristics. Symbols highlighted by the historical file include: DBRI_DELETED; DBRI_LOCKED; DBRI_RECNO; DBI_ISDBF; DBI_GETRECSIZE; DBI_GETLOCKARRAY. Confirm names, availability and behavior against the official include package for the target environment.

02 · SYNTAX

Syntax

#Include "DBInfo.ch"

Parameters

DBInfo.ch

.ch fileOptional

Compile-time include; whether it is required depends on the symbols used by the source.

Return value

An include has no runtime return value. Its directives are processed during compilation.

03 · PRACTICAL EXAMPLE

Minimal include for study

#Include "DBInfo.ch"

User Function ExDbinfo()
    // Use only symbols documented for the target release.
Return

Expected result

The preprocessor makes definitions from the configured include path available.

BEST PRACTICES

Include it only when the source depends on one of its symbols.
Use includes matching the environment and LIB version.
Search the current package before treating a historical symbol as valid.
Prefer current official documentation for supported APIs.

COMMON PITFALLS

The analyzed file is historical.
Copying an old include can create LIB or RPO incompatibilities.
A declared directive does not prove that its related API is still supported.