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Add new error code for "file name too long"

This new error code, named file_name_too_long, maps internally to theerrno ENAMETOOLONG to produce a proper error code rather than aninternal code under errcode_for_file_access(). This error code can bereached with some SQL command patterns, like a snapshot file name.Reported-by: Alexander LakhinReviewed-by: Daniel GustafssonDiscussion:https://postgr.es/m/Zo4ROR9mgy8bowMo@paquier.xyz

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src/backend/utils
- errcodes.txt
- error
  - elog.c

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`‎src/backend/utils/errcodes.txt`

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Original file line number	Diff line number	Diff line change
`@@ -439,6 +439,7 @@ Section: Class 58 - System Error (errors external to PostgreSQL itself)`
`439`	`439`	`58030 E ERRCODE_IO_ERROR io_error`
`440`	`440`	`58P01 E ERRCODE_UNDEFINED_FILE undefined_file`
`441`	`441`	`58P02 E ERRCODE_DUPLICATE_FILE duplicate_file`
	`442`	`+58P03 E ERRCODE_FILE_NAME_TOO_LONG file_name_too_long`
`442`	`443`
`443`	`444`	`Section: Class F0 - Configuration File Error`
`444`	`445`

`‎src/backend/utils/error/elog.c`

Lines changed: 4 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -929,6 +929,10 @@ errcode_for_file_access(void)`
`929`	`929`	`edata->sqlerrcode=ERRCODE_IO_ERROR;`
`930`	`930`	`break;`
`931`	`931`
	`932`	`+caseENAMETOOLONG:/* File name too long */`
	`933`	`+edata->sqlerrcode=ERRCODE_FILE_NAME_TOO_LONG;`
	`934`	`+break;`
	`935`	`+`
`932`	`936`	`/* All else is classified as internal errors */`
`933`	`937`	`default:`
`934`	`938`	`edata->sqlerrcode=ERRCODE_INTERNAL_ERROR;`

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Commit2d8ef5e

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2 files changed

2 files changed

`‎src/backend/utils/errcodes.txt`

`‎src/backend/utils/error/elog.c`

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