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CHAIN for Keyed Access | iRPGenie

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File I/O

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RPG Programming · Chain Keyed Access

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97RPGLE File Declarations with dcl-f
98Reading Physical Files in RPGLE with READ
99Understanding %EOF in RPGLE File Processing
100CHAIN for Keyed Access
101Understanding %FOUND after CHAIN
102Writing Records with WRITE
103Updating Records with UPDATE
104Deleting Records with DELETE
105SETLL in RPGLE
106READE for Reading Matching Keys
107READP and Reading Backward
108Processing Duplicate Keys in RPGLE
109Basic File Locking Concept in RPGLE
110Handling File I/O Errors at a Beginner Level
111Debugging RPGLE File I/O Programs
112Common RPGLE File I/O Mistakes and Best Practices

Lessons in File I/O

97RPGLE File Declarations with dcl-f
98Reading Physical Files in RPGLE with READ
99Understanding %EOF in RPGLE File Processing
100CHAIN for Keyed Access
101Understanding %FOUND after CHAIN

Lesson 100 of 288

RPG Programming

CHAIN for Keyed Access

How to use CHAIN to look up one specific record in a keyed physical file by its key value.

~6 min read

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102

Writing Records with WRITE

103Updating Records with UPDATE

104Deleting Records with DELETE

105SETLL in RPGLE

106READE for Reading Matching Keys

107READP and Reading Backward

108Processing Duplicate Keys in RPGLE

109Basic File Locking Concept in RPGLE

110Handling File I/O Errors at a Beginner Level

111Debugging RPGLE File I/O Programs

112Common RPGLE File I/O Mistakes and Best Practices

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Try asking: “Can CHAIN look up a record using more than one key field at once?”

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