SYSTEM CATALOG · System catalog

pg_propgraph_element

PostgreSQL documentation ↗Source definition ↗

The catalog pg_propgraph_element stores information about the vertices and edges of a property graph, collectively called the elements of the property graph.

First seen PG 19Last seen PG 19Columns 14

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

Checked column by column against a PostgreSQL 19beta3 instance · Raw measurement record ↗

Columns PostgreSQL 19

pg_propgraph_element

COLUMN	TYPE	DESCRIPTION
`oid`	`oid`NOT NULL	Row identifier
`pgepgid`	`oid`NOT NULL	Reference to the property graph that this element belongs toReferences:`pg_class.oid`
`pgerelid`	`oid`NOT NULL	Reference to the table that contains the data for this property graph elementReferences:`pg_class.oid`
`pgealias`	`name`NOT NULL	The alias of the element. This is a unique identifier for the element within the graph. It is set when the property graph is defined and defaults to the name of the underlying element table.
`pgekind`	`"char"`NOT NULLDocumented as:`char`	v for a vertex, e for an edge
`pgesrcvertexid`	`oid`NOT NULL	For an edge, a link to the source vertex. (Zero for a vertex.)References:`pg_propgraph_element.oid`
`pgedestvertexid`	`oid`NOT NULL	For an edge, a link to the destination vertex. (Zero for a vertex.)References:`pg_propgraph_element.oid`
`pgekey`	`smallint[]`NOT NULLDocumented as:`int2[]`	An array of column numbers in the table referenced by pgerelid that defines the key to use for this element table. (This defaults to the primary key when the property graph is created.)References:`pg_attribute.attnum`
`pgesrckey`	`smallint[]`Documented as:`int2[]`	For an edge, an array of column numbers in the table referenced by pgerelid that defines the source key to use for this element table. (Null for a vertex.) The combination of pgesrckey and pgesrcref creates the link between the edge and the source vertex.References:`pg_attribute.attnum`
`pgesrcref`	`smallint[]`Documented as:`int2[]`	For an edge, an array of column numbers in the table reached via pgesrcvertexid. (Null for a vertex.) The combination of pgesrckey and pgesrcref creates the link between the edge and the source vertex.References:`pg_attribute.attnum`
`pgesrceqop`	`oid[]`	For an edge, an array of equality operators for pgesrcref = pgesrckey comparison. (Null for a vertex.)References:`pg_operator.oid`
`pgedestkey`	`smallint[]`Documented as:`int2[]`	For an edge, an array of column numbers in the table referenced by pgerelid that defines the destination key to use for this element table. (Null for a vertex.) The combination of pgedestkey and pgedestref creates the link between the edge and the destination vertex.References:`pg_attribute.attnum`
`pgedestref`	`smallint[]`Documented as:`int2[]`	For an edge, an array of column numbers in the table reached via pgedestvertexid. (Null for a vertex.) The combination of pgedestkey and pgedestref creates the link between the edge and the destination vertex.References:`pg_attribute.attnum`
`pgedesteqop`	`oid[]`	For an edge, an array of equality operators for pgedestref = pgedestkey comparison. (Null for a vertex.)References:`pg_operator.oid`

Columns marked "implicit" are not included in SELECT *; some early statistics views are completed from same-version source, and the extra provenance is shown in the column description.

Common system columns 6

System attributes PostgreSQL provides, normally not expanded by SELECT *. Kept separately so they are not mixed in with ordinary columns.

Columns	Type	attnum
`tableoid`	`oid`	-6
`cmax`	`cid`	-5
`xmax`	`xid`	-4
`cmin`	`cid`	-3
`xmin`	`xid`	-2
`ctid`	`tid`	-1

Column evolution matrix

Hover a cell for the column type

PresentAdded / type or attribute changeRemoved

COLUMN	9.0	9.1	9.2	9.3	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18
`oid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgepgid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgerelid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgealias`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgekind`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgesrcvertexid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgedestvertexid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgekey`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgesrckey`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgesrcref`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgesrceqop`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgedestkey`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgedestref`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgedesteqop`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

9.0 is the coverage baseline; a column already present in the baseline is not marked as added. The matrix aligns columns by name, so a rename appears as the old column removed and a new column added.

Evolution timeline

Changes between adjacent majors

PostgreSQL 19 ← 18Catalog added

+ oid+ pgepgid+ pgerelid+ pgealias+ pgekind+ pgesrcvertexid+ pgedestvertexid+ pgekey+ pgesrckey+ pgesrcref+ pgesrceqop+ pgedestkey+ pgedestref+ pgedesteqop

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