Summary of runtime considerations for processing database files

This topic shows the parameters that control your program's use of the database file member, where these parameters can be specified.

For parameters that can be specified in more than one place, the system merges the values. The Override with Database File (OVRDBF) command parameters take precedence over program parameters, and Open Database File (OPNDBF) or Open Query File (OPNQRYF) command parameters take precedence over create or change file parameters.

Note: Any override parameters other than TOFILE, MBR, LVLCHK, SEQONLY, SHARE, WAITRCD, and INHWRT are ignored by the OPNQRYF command.

A table of database processing options specified on control language (CL) commands is shown here.

Table 1. Database processing options specified on CL commands
Description	Parameter	Command
Description	Parameter	CRTPF, CRTLF	CHGPF, CHGLF	OPNDBF	OPNQRYF	OVRDBF
File name	FILE	X	X¹	X	X	X
Library name		X	X²	X	X	X
Member name	MBR	X		X	X	X
Member processing options	OPTION			X	X
Record format lock state	RCDFMTLCK					X
Starting file position after open	POSITION					X
Program performs only sequential processing	SEQONLY			X	X	X
Ignore keyed sequence access path	ACCPTH			X
Time to wait for file locks	WAITFILE	X	X			X
Time to wait for record locks	WAITRCD	X	X			X
Prevent overrides	SECURE					X
Number of records to be transferred from auxiliary to main storage	NBRRCDS					X
Share open data path with other programs	SHARE	X	X			X
Format selector	FMTSLR	X³	X³			X
Force ratio	FRCRATIO	X	X			X
Inhibit write	INHWRT					X
Level check record formats	LVLCHK	X	X			X
Expiration date checking	EXPCHK					X
Expiration date	EXPDATE	X⁴	X⁴			X
Force access path	FRCACCPTH	X	X
Commitment control	COMMIT			X	X
End-of-file delay	EOFDLY					X
Duplicate key check	DUPKEYCHK			X	X
Reuse deleted record space	REUSEDLT	X⁴	X⁴
Coded character set identifier	CCSID	X⁴	X⁴
Sort Sequence	SRTSEQ	X	X		X
Language identifier	LANGID	X	X		X
¹ File name: The CHGPF and CHGLF commands use the file name for identification only. You cannot change the file name. ² Library name: The CHGPF and CHGLF commands use the library name for identification only. You cannot change the library name. ³ Format selector: Used on the CRTLF and CHGLF commands only. ⁴ Expiration date, reuse deleted records, and coded character set identifier: Used on the CRTPF and CHGPF commands only.

A table of database processing options specified in programs is shown here.

Table 2. Database processing options specified in programs
Description	RPG/400^® Language	COBOL/400^® Language	iSeries™ BASIC	iSeries PL/I	iSeries Pascal
File name	X	X	X	X	X
Library name			X	X	X
Member name			X	X	X
Program record length	X	X	X	X	X
Member processing options	X	X	X	X	X
Record format lock state			X	X
Record formats the program will use	X		X
Clear physical file member of records		X	X		X
Program performs only sequential processing	X	X		X	X
Ignore keyed sequence access path	X	X	X	X	X
Share open data path with other programs				X	X
Level check record formats	X	X	X	X
Commitment control	X	X		X
Duplicate key check		X
Note: Control language (CL) programs can also specify many of these parameters. See Table 1 for more information about the database processing options that can be specified on CL commands.