1 files changed, 116 insertions, 0 deletions
diff --git a/src/backend/access/rmgrdesc/spgdesc.c b/src/backend/access/rmgrdesc/spgdesc.c
new file mode 100644
index 0000000..a5478e3
--- /dev/null
+++ b/src/backend/access/rmgrdesc/spgdesc.c
@@ -0,0 +1,116 @@
+/*-------------------------------------------------------------------------
+ *
+ * spgdesc.c
+ *	  rmgr descriptor routines for access/spgist/spgxlog.c
+ *
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  src/backend/access/rmgrdesc/spgdesc.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/spgxlog.h"
+
+void
+spg_desc(StringInfo buf, XLogReaderState *record)
+{
+	char	   *rec = XLogRecGetData(record);
+	uint8		info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
+
+	switch (info)
+	{
+		case XLOG_SPGIST_ADD_LEAF:
+			{
+				spgxlogAddLeaf *xlrec = (spgxlogAddLeaf *) rec;
+
+				appendStringInfoString(buf, "add leaf to page");
+				appendStringInfo(buf, "; off %u; headoff %u; parentoff %u",
+								 xlrec->offnumLeaf, xlrec->offnumHeadLeaf,
+								 xlrec->offnumParent);
+				if (xlrec->newPage)
+					appendStringInfoString(buf, " (newpage)");
+				if (xlrec->storesNulls)
+					appendStringInfoString(buf, " (nulls)");
+			}
+			break;
+		case XLOG_SPGIST_MOVE_LEAFS:
+			appendStringInfo(buf, "%u leafs",
+							 ((spgxlogMoveLeafs *) rec)->nMoves);
+			break;
+		case XLOG_SPGIST_ADD_NODE:
+			appendStringInfo(buf, "off %u",
+							 ((spgxlogAddNode *) rec)->offnum);
+			break;
+		case XLOG_SPGIST_SPLIT_TUPLE:
+			appendStringInfo(buf, "prefix off: %u, postfix off: %u (same %d, new %d)",
+							 ((spgxlogSplitTuple *) rec)->offnumPrefix,
+							 ((spgxlogSplitTuple *) rec)->offnumPostfix,
+							 ((spgxlogSplitTuple *) rec)->postfixBlkSame,
+							 ((spgxlogSplitTuple *) rec)->newPage
+				);
+			break;
+		case XLOG_SPGIST_PICKSPLIT:
+			{
+				spgxlogPickSplit *xlrec = (spgxlogPickSplit *) rec;
+
+				appendStringInfo(buf, "ndel %u; nins %u",
+								 xlrec->nDelete, xlrec->nInsert);
+				if (xlrec->innerIsParent)
+					appendStringInfoString(buf, " (innerIsParent)");
+				if (xlrec->isRootSplit)
+					appendStringInfoString(buf, " (isRootSplit)");
+			}
+			break;
+		case XLOG_SPGIST_VACUUM_LEAF:
+			/* no further information */
+			break;
+		case XLOG_SPGIST_VACUUM_ROOT:
+			/* no further information */
+			break;
+		case XLOG_SPGIST_VACUUM_REDIRECT:
+			appendStringInfo(buf, "newest XID %u",
+							 ((spgxlogVacuumRedirect *) rec)->newestRedirectXid);
+			break;
+	}
+}
+
+const char *
+spg_identify(uint8 info)
+{
+	const char *id = NULL;
+
+	switch (info & ~XLR_INFO_MASK)
+	{
+		case XLOG_SPGIST_ADD_LEAF:
+			id = "ADD_LEAF";
+			break;
+		case XLOG_SPGIST_MOVE_LEAFS:
+			id = "MOVE_LEAFS";
+			break;
+		case XLOG_SPGIST_ADD_NODE:
+			id = "ADD_NODE";
+			break;
+		case XLOG_SPGIST_SPLIT_TUPLE:
+			id = "SPLIT_TUPLE";
+			break;
+		case XLOG_SPGIST_PICKSPLIT:
+			id = "PICKSPLIT";
+			break;
+		case XLOG_SPGIST_VACUUM_LEAF:
+			id = "VACUUM_LEAF";
+			break;
+		case XLOG_SPGIST_VACUUM_ROOT:
+			id = "VACUUM_ROOT";
+			break;
+		case XLOG_SPGIST_VACUUM_REDIRECT:
+			id = "VACUUM_REDIRECT";
+			break;
+	}
+
+	return id;
+}