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Throw nice error if server is too old to support psql's \ef or \sf command.

Previously, you'd get "function pg_catalog.pg_get_functiondef(integer) doesnot exist", which is at best rather unprofessional-looking. Back-patchto 8.4 where \ef was introduced.Josh Kupershmidt

1 parent019d45e commitc49130aCopy full SHA for c49130a

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src/bin/psql
- command.c

1 file changed

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`‎src/bin/psql/command.c`

Lines changed: 7 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -508,7 +508,13 @@ exec_command(const char *cmd,`
`508`	`508`	`*/`
`509`	`509`	`elseif (strcmp(cmd,"ef")==0)`
`510`	`510`	`{`
`511`		`-if (!query_buf)`
	`511`	`+if (pset.sversion<80400)`
	`512`	`+{`
	`513`	`+psql_error("The server (version %d.%d) does not support editing function source.\n",`
	`514`	`+pset.sversion /10000, (pset.sversion /100) %100);`
	`515`	`+status=PSQL_CMD_ERROR;`
	`516`	`+}`
	`517`	`+elseif (!query_buf)`
`512`	`518`	`{`
`513`	`519`	`psql_error("no query buffer\n");`
`514`	`520`	`status=PSQL_CMD_ERROR;`

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Commitc49130a

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`‎src/bin/psql/command.c`

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