GS_LOGICAL_ATTRIBUTE

GS_LOGICAL_ATTRIBUTE records information about catalog fields required for logical decoding.

**Table 1** GS_LOGICAL_ATTRIBUTE columns
Column	Type	Description
attrelid	oid	RELATION OID that contains the attribute.
attname	name	Attribute name.
atttypid	oid	OID of the data type of the attribute.
attlen	smallint	Attribute length.
attnum	smallint	Attribute ID, which uniquely identifies an attribute in a relationship.
atthasdef	boolean	Specifies whether an attribute has a default value.
csnmin	bigint	CSN when a tuple is inserted.
csnmax	bigint	CSN when a tuple is updated or deleted.
createtime	timestamp with time zone	Timestamp when a tuple is inserted.
originid	integer	Source identifier of a tuple.
dbnode	oid	Database OID.
attndims	integer	If the value is of the array type, the value is the declared dimension number. Otherwise, the value is zero.
attcacheoff	integer	Used for the byte offset of the function cache attribute in the heap tuple.
attbyval	boolean	Specifies whether an attribute is transferred by value.
attstorage	"char"	Attribute storage mode.
attalign	"char"	Alignment mode of an attribute.
attisdropped	boolean	Specifies whether the data is deleted (logically invisible).
attinitdefval	bytea	Default value expression of a storage attribute.
attcollation	oid	Copy of attcollation in PG_ATTRIBUTE of the column type.
atttypmod	integer	Copy of atttypmod in PG_ATTRIBUTE of the column type.