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Handle XLOG_BTREE_META_CLEANUP in btree_desc() and btree_identify()

New WAL record XLOG_BTREE_META_CLEANUP introduced in857f9c3 has no handlingin btree_desc() and btree_identify(). This patch implements correspondinghandling.Alexander Korotkov

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src/backend/access/rmgrdesc
- nbtdesc.c

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`‎src/backend/access/rmgrdesc/nbtdesc.c`

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Original file line number	Diff line number	Diff line change
`@@ -96,6 +96,15 @@ btree_desc(StringInfo buf, XLogReaderState *record)`
`96`	`96`	`xlrec->node.relNode,xlrec->latestRemovedXid);`
`97`	`97`	`break;`
`98`	`98`	`}`
	`99`	`+caseXLOG_BTREE_META_CLEANUP:`
	`100`	`+{`
	`101`	`+xl_btree_metadataxlrec= (xl_btree_metadata)rec;`
	`102`	`+`
	`103`	`+appendStringInfo(buf,"oldest_btpo_xact %u; last_cleanup_num_heap_tuples: %lf",`
	`104`	`+xlrec->oldest_btpo_xact,`
	`105`	`+xlrec->last_cleanup_num_heap_tuples);`
	`106`	`+break;`
	`107`	`+}`
`99`	`108`	`}`
`100`	`109`	`}`
`101`	`110`
`@@ -148,6 +157,9 @@ btree_identify(uint8 info)`
`148`	`157`	`caseXLOG_BTREE_REUSE_PAGE:`
`149`	`158`	`id="REUSE_PAGE";`
`150`	`159`	`break;`
	`160`	`+caseXLOG_BTREE_META_CLEANUP:`
	`161`	`+id="META_CLEANUP";`
	`162`	`+break;`
`151`	`163`	`}`
`152`	`164`
`153`	`165`	`returnid;`

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Commit3d92796

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`‎src/backend/access/rmgrdesc/nbtdesc.c`

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