System tables of a geodatabase in PostgreSQL

The system tables for a geodatabase enforce geodatabase behavior, store information about the geodatabase, and keep track of the data stored in the geodatabase.

View a diagram of enterprise geodatabase system tables.

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The system tables and their contents should not be altered using anything other than ArcGIS software. However, you can use SQL to view the contents of the system tables.

gdb_itemrelationships

The gdb_itemrelationships table stores information about how objects in the gdb_items table are related. For example, feature datasets and replicas are tracked in this table.

Field name	Field type	Description	Null?
objectid	integer	Unique identifier for the row	NOT NULL
uuid	varchar(38)	Unique identifier of the item	NOT NULL
type	varchar(38)	Corresponds to uuid in the gdb_itemrelationshiptypes table	NOT NULL
originid	varchar(38)	Corresponds to uuid in the gdb_items table	NOT NULL
destid	varchar(38)	Corresponds to uuid in the gdb_items table	NOT NULL
properties	integer	Bitmask of item properties
attributes	xml	Property set representing the attribute pairs

gdb_itemrelationshiptypes

The gdb_itemrelationshiptypes table maintains data on the types of relationships that exist between the objects in the gdb_items table.

Field name	Field type	Description	Null?
objectid	integer	Unique identifier for the row	NOT NULL
uuid	varchar(38)	Unique identifier of the item	NOT NULL
name	varchar(226)	Name of the relationship type; values include the following: DatasetInFeatureDataset DatasetInFolder DatasetOfReplicaDataset DatasetsRelatedThrough DomainInDataset FeatureClassInGeometricNetwork FeatureClassInNetworkDataset FeatureClassInParcelFabric FeatureClassInTerrain FeatureClassInTopology FolderInFolder ItemInFolder ReplicaDatasetInReplica RepresentationOfFeatureClass TableInParcelFabric	NOT NULL
forwardlabel	varchar(226)	Label that describes the relationship from the context of the origin item
backwardlabel	varchar(226)	Label that describes the relationship from the context of the destination item
origitemtypeid	varchar(38)	Corresponds to uuid in the gdb_itemtypes table	NOT NULL
destitemtypeid	varchar(38)	Corresponds to uuid in the gdb_itemtypes table	NOT NULL
iscontainment	smallint	Indicates whether the origin item's existence controls the existence of the destination object

gdb_items

Items are any object used in the ArcGIS system that can be indexed and searched, including tables, domains, topologies, and networks. The gdb_items table maintains information about all the items stored in the geodatabase.

Field name	Field type	Description	Null?
objectid	integer	Unique identifier for the row	NOT NULL
uuid	varchar(38)	Unique identifier of the item	NOT NULL
type	varchar(38)	Corresponds to uuid in the gdb_itemtypes table	NOT NULL
name	varchar(226)	Name of the item (logical)	NOT NULL
physicalname	varchar(226)	Fully qualified name of the item
path	varchar(512)	The unique relative path to the item
url	varchar(255)	The associated URL for the item; used with catalog services
properties	integer	Bitmask of item properties
defaults	bytea	Information about the item that is independent of the underlying dataset, such as a serialized renderer; a symbol for a feature class; or column widths, colors, or fonts for tables
datasetsubtype1	integer	Indicates the feature type of the table Possible values are as follows for feature classes and raster catalogs: Null 1 = simple feature 7 = simple junction feature 8 = simple edge 10 = complex edge 11 = annotation feature 13 = dimension feature 14 = raster catalog item For relationship classes, the cardinality of the relationship class is stored. Possible values are: 1 = 1:1 2 = 1:M 3 = M:N For topologies, this column stores the Topology ID.
datasetsubtype2	integer	Indicates the geometry type of the table Possible values are as follows for feature classes and raster catalogs: Null 1 = single, zero dimensional geometry 2 = ordered collection of points 3 = ordered collection of paths 4 = collection of rings ordered by their containment relationship 9 = collection of surface patches For relationship classes, the value in this column indicates whether the relationship class is attributed. Possible values are 0 = nonattributed, or 1 = attributed.
datasetinfo1	varchar(255)	Stores the shape field name for feature classes
datasetinfo2	varchar(255)	Stores information for feature classes that participate in topologies
definition	xml	Stores information about the item
documentation	xml	Data definition of the item (metadata)
iteminfo	xml	Storage information for the item, such as symbology, that is independent of the underlying dataset
shape	st_geometry	The spatial extent of the item

gdb_itemtypes

The gdb_itemtypes table stores information on what type of object each item in the gdb_items table is.

Field name	Field type	Description	Null?
objectid	integer	Unique identifier for the row	NOT NULL
uuid	varchar(38)	Unique identifier of the item	NOT NULL
parenttypeid	varchar(226)	Corresponds to uuid in this (the gdb_itemtypes) table	NOT NULL
name	varchar(38)	Name of the item type; values include the following: AbstractTable Catalog Dataset Coded Value Domain Dataset Domain Extension Dataset Feature Class Feature Dataset Folder Geometric Network Historical Marker Item Mosaic Dataset Network Dataset Parcel Fabric Range Domain Raster Catalog Raster Dataset Relationship Class Replica Replica Dataset Representation Class Resource Schematic Dataset Survey Datraset Table Terrain Tin Toolbox Topology Workspace Workspace Extension	NOT NULL

gdb_replicalog

Each time a replica exports or imports changes, information about the operation is stored in the gdb_replicalog table.

Field name	Field type	Description	Null?
id	integer	Unique identifier for the row	NOT NULL
replicaid	integer	Corresponds to the objectid field in the gdb_items table	NOT NULL
event	integer	Indicates whether an import (1) or an export (2) has been logged	NOT NULL
errorcode	integer	The error code associated with the event; you can search the developer help to get the description associated with the error. If the event was successful, a success error code is returned.	NOT NULL
logdate	timestamp without time zone	The date on which the event occurred	NOT NULL
sourcebegingen	integer	Several generations of data changes may be imported or exported in one event. This value indicates the generation number of the first generation of changes involved. For example, if generations 1 to 3 were imported, this field would have the value 1.	NOT NULL
sourceendgen	integer	Several generations of data changes may be imported or exported in one event. This value indicates the generation number of the last generation of changes involved. For example, if generations 1 to 3 were imported, this field would have the value 3.	NOT NULL
targetgen	integer	The generation to which changes are to be applied; this value is used to apply changes to the appropriate version in the target replica.	NOT NULL

gdb_tables_last_modified

The gdb_tables_last_modified table is used to validate geodatabase system tables when cached by the client application.

Field name	Field type	Description	Null?
table_name	varchar(160)	Name of the geodatabase system table that was modified	NOT NULL
last_modified_count	integer	Keeps a count of the number of times a system table is modified; incrementally increases for each modification	NOT NULL

sde_archives

The sde_archives table stores the metadata for the archives in a geodatabase.

Field Name	Field Type	Description	Null?
archiving_regid	integer	The registration ID of the business table	NOT NULL
history_regid	integer	The registration ID of the archive table	NOT NULL
from_date	varchar(32)	The name of the from date field	NOT NULL
to_date	varchar(32)	The name of the to date field	NOT NULL
archive_date	bigint	The date the archive was created	NOT NULL
archive_flags	bigint	Not currently used	NOT NULL

sde_column_registry

The sde_column_registry table manages all registered columns.

Caution:

If you alter column definitions using a SQL interface, the records in the sde_column_registry table are not updated. This may cause any subsequent exports of the data to fail.

Field Name	Field Type	Description	Null?
database_name	varchar(32)	Name of the database in which the table containing the column is stored	NOT NULL
table_name	varchar(128)	Name of the table that contains the registered column	NOT NULL
owner	varchar(32)	Owner of the table in which the column resides (the user who created the table)	NOT NULL
column_name	varchar(32)	Name of the registered column	NOT NULL
sde_type	integer	Code for the column's data type; possible values and their definitions include the following: 1 = SE_INT16_TYPE—2-byte integer 2 = SE_INT32_TYPE—4-byte integer 3 = SE_FLOAT32_TYPE—4-byte float 4 = SE_FLOAT64_TYPE—8-byte float 5 = SE_STRING_TYPE—Null terminal character array 6 = SE_BLOB_TYPE—Variable length data 7 = SE_DATE_TYPE—Structured time date 8 = SE_SHAPE_TYPE—Shape geometry (SE_SHAPE) 9 = SE_RASTER_TYPE—Raster 10 = SE_XML_TYPE—XML document 11 = SE_INT64_TYPE—8-byte integer 12 = SE_UUID_TYPE—A universal unique ID 13 = SE_CLOB_TYPE—Character variable length data 14 = SE_NSTRING_TYPE—Unicode null terminal character array 15 = SE_NCLOB_TYPE—Unicode character large object 20 = SE_POINT_TYPE—Point user-defined type 21 = SE_CURVE_TYPE—Linestring user-defined type 22 = SE_LINESTRING_TYPE—Linestring user-defined type 23 = SE_SURFACE_TYPE—Polygon user-defined type 24 = SE_POLYGON_TYPE— Polygon user-defined type 25 = SE_GEOMETRYCOLLECTION_TYPE—Multipoint user-defined type 26 = SE_MULTISURFACE_TYPE—Linestring user-defined type 27 = SE_MULTICURVE_TYPE—Linestring user-defined type 28 = SE_MULTIPOINT_TYPE—Multipoint user-defined type 29 = SE_MULTILINESTRING_TYPE—Multilinestring user-defined type 30 = SE_MULTIPOLYGON_TYPE—Multipolygon user-defined type 31 = SE_GEOMETRY_TYPE—Geometry user-defined type
column_size	integer	The length of the registered column value
decimal_digits	integer	Number of integers to the right of the decimal in the column value
description	varchar(65)	A description of the type of column
object_flags	integer	Stores the column properties, which include the following: Has a row ID Row ID column controlled by ArcSDE Allows NULLs Stores Oracle LONG RAW data Stores BLOB data Stores CLOB data Stores ST_Geometry geometry data Stores binary geometry data Stores user-defined type geometry data Stores Oracle LOB geometry data Stores binary raster data Stores user-defined type raster data Stores XML data Stores dates Stores time Stores a timestamp Stores a Unicode string	NOT NULL
object_id	integer	This value is set to the rastercolumn_id of the sde_raster_columns table if the column is a raster column or the layer_id of the sde_layers table if this column is a geometry column.

sde_compress_log

The sde_compress_log table tracks all compress operations performed on the geodatabase.

Note:

This table is created the first time you compress the geodatabase.

Field name	Field type	Description	Null?
compress_id	integer	Unique identifier of a compress operation	NOT NULL
sde_id	integer	Process identification number of the compress operation; references sde_id column in sde_process_information table	NOT NULL
server_id	integer	System process_id of the ArcSDE server process that performed or is performing the compress operation	NOT NULL
direct_connect	varchar(1)	Y (yes) or N (no) if the client is making a direct connection to the geodatabase	NOT NULL
compress_start	timestamp without time zone	The date and time the compress operation started	NOT NULL
start_state_count	integer	The number of states present when compress started	NOT NULL
compress_end	timestamp without time zone	The date and time the compress operation completed	NOT NULL
end_state_count	integer	The number of remaining states after the compress operation	NOT NULL
compress_status	varchar(20)	Indicates whether or not the compress operation completed successfully	NOT NULL

sde_coordinate_systems

The sde_coordinate_systems table stores standard coordinate systems. This table is prepopulated with coordinate systems to be used to define spatial references.

Field name	Field type	Description	Null?
name	varchar(128)	Name of the coordinate system
type	varchar(128)	Either PROJECTED, GEOGRAPHIC, or UNSPECIFIED
definition	varchar(2048)	Well-known text description of the coordinate system
organization	varchar(128)	Name of the organization that defined the coordinate system
id	integer	The identifier for the coordinate system; assigned by the organization that defined the coordinate system	NOT NULL
description	varchar(256)	Text that provides descriptive information about the coordinate system

sde_dbtune

The sde_dbtune table stores the configuration keywords forArcSDE data objects, such as feature classes.

Field name	Field type	Description	Null?
keyword	varchar(32)	The configuration keyword	NOT NULL
parameter_name	varchar(32)	The configuration parameter	NOT NULL
config_string	varchar(2048)	The value of the configuration parameter

sde_geometry_columns

The sde_geometry_columns table stores a row for each column of type Geometry in the database that complies with the OpenGIS SQL specification. ArcSDE treats this table as write only—the only time it is accessed by ArcSDE is when a layer is added or deleted that uses an OpenGIS SQL data format. This table is defined by the OpenGIS SQL specification and may be updated by other applications with geometry columns not managed by ArcSDE. When a new Geometry column is created in an OpenGIS compliant format, the fully qualified table, column name, and spatial reference ID (srid) are added to the sde_geometry_columns table.

Each geometry column is associated with a spatial reference system. ArcSDE stores information on each spatial reference system in the sde_spatial_references table.

Field name	Field type	Description	Null?
f_table_catalog	varchar(32)	The database in which the geometry column's table is stored	NOT NULL
f_table_schema	varchar(32)	Schema in which the business table is stored	NOT NULL
f_table_name	varchar(160)	Name of the business table of the dataset	NOT NULL
f_geometry_column	varchar(32)	Name of the geometry column in the business table	NOT NULL
storage_type	integer	Code for the storage type of the geometry; code could represent either WKB, WKT, or BINARY
geometry_type	integer	The geometry type code; ArcSDE inserts one of the following values into this field: 0 = ST_Geometry 1 = ST_Point 3 = ST_LineString 5 = ST_Polygon 7 = ST_MultiPoint 9 = ST_MultiLineString 11 = ST_MultiPolygon
coord_dimension	integer	Code for the coordinate dimension: 0 = point 1 = linear 2 = area
max_ppr	integer	Maximum points per row (no longer used by ArcSDE)
srid	integer	Spatial reference ID Foreign key to srid in sde_spatial_references table	NOT NULL

sde_layer_locks

The sde_layer_locks table maintains the locks on feature classes.

Field name	Field type	Description	Null?
sde_id	integer	Process identification number of the process that has locked the layer; foreign key to the sde_id column in process_information table	NOT NULL
layer_id	integer	Corresponds to layer_id field in layers table	NOT NULL
autolock	character(1)	Set to 1 if the layer lock was set internally; otherwise, set to 0 if the layer lock was set by the application.	NOT NULL
lock_type	character(1)	The type of layer lock can be one of the following: 0 = A read lock on the entire layer 1 = A write lock on the entire layer 2 = A read lock on an area within the layer 3 = A write lock on an area within the layer 4 = A layer autolock	NOT NULL
minx	bigint	The minimum x-coordinate of the bounding box used to define the features within an area locked during an area lock
miny	bigint	The minimum y-coordinate of the bounding box used to define the features within an area locked during an area lock
maxx	bigint	The maximum x-coordinate of the bounding box used to define the features within an area locked during an area lock
maxy	bigint	The maximum y-coordinate of the bounding box used to define the features within an area locked during an area lock
lock_time	timestamp without time zone	The date and time the layer lock was acquired	NOT NULL

sde_layer_stats

The sde_layer_stats table is no longer used.

sde_layers

The sde_layers table maintains data about each feature class in the database. The information helps build and maintain spatial indexes, ensure proper shape types, maintain data integrity, and store the spatial reference for the coordinate data.

This table stores a row for each spatial column in the database. Applications use the layer properties to discover available spatial data sources. The layer properties are used by ArcSDE to constrain and validate the contents of the spatial column, index geometry values, and properly create and manage the associated DBMS tables.

Field name	Field type	Description	Null?
layer_id	integer	The unique identifier for the layer	NOT NULL
description	varchar(65)	User-defined description of the layer
database_name	varchar(32)	Name of the database in which the layer is stored	NOT NULL
owner	varchar(30)	The user who created the layer	NOT NULL
table_name	varchar(128)	Name of the business table of the layer	NOT NULL
spatial_column	varchar(128)	Name of the spatial column in the layer	NOT NULL
eflags	integer	Stores the following layer properties: Stores single-precision or double-precision coordinates Stores 3D coordinates Stores measures Has autolocking enabled or disabled Is in load-only I/O mode or normal I/O mode Stores annotation Stores CAD data Is a view of another layer Does not have a spatial index The DBMS data type in which the layer data is stored The sde types that the layer can accept, which can be such types as points, linestrings, and polygons	NOT NULL
layer_mask	integer	Stores additional internal properties about the layer	NOT NULL
minx	double precision	Minimum x-coordinate value of the layer	NOT NULL
miny	double precision	Minimum y-coordinate value of the layer	NOT NULL
maxx	double precision	Maximum x-coordinate value of the layer	NOT NULL
maxy	double precision	Maximum y-coordinate value of the layer	NOT NULL
minz	double precision	Minimum z-coordinate value of the layer
maxz	double precision	Maximum z-coordinate value of the layer
minm	double precision	Minimum m-coordinate value of the layer
maxm	double precision	Maximum m-coordinate value of the layer
cdate	integer	The date the layer was created	NOT NULL
layer_config	varchar(32)	The configuration keyword that was specified when the layer was created
optimal_array_size	integer	Geometry array buffer size
stats_date	integer	The date statistics were last calculated for a layer
minimum_id	integer	The minimum feature ID value of a binary layer
srid	integer	Spatial reference identification number; foreign key to srid value in the sde_spatial_references table	NOT NULL
secondary_srid	integer	Foreign key to srid field in sde_spatial_references table
base_layer_id	integer	Stores the base layer's layer_id value for a layer that is actually a view	NOT NULL
gsize1	double precision	Size of first spatial grid	NOT NULL
gsize2	double precision	Size of second spatial grid	NOT NULL
gsize3	double precision	Size of third spatial grid	NOT NULL

sde_lineages_modified

The sde_lineages_modified table contains a state lineage ID and its most recent modification time stamp.

Field name	Field type	Description	Null?
lineage_name	bigint	Corresponds to the lineage_name field in the states_lineages table	NOT NULL
time_last_modified	timestamp without time zone	The date and time the lineage was last modified	NOT NULL

sde_locators

The sde_locators table stores information about locator objects.

Field name	Field type	Description	Null?
locator_id	integer	Unique identifier of the locator	NOT NULL
name	varchar(32)	The name of the locator	NOT NULL
owner	varchar(32)	The name of the user who owns the locator	NOT NULL
category	varchar(32)	The category of the locator; address locators have a category value of Address	NOT NULL
type	integer	The type of locator; values represented as follows: 0—Defines locator styles 1—Defines locators 2—Defines attached locators; in other words, locators that are attached to a geocoded feature class and are a copy of the locator and the geocoding options that were used to create the geocoded feature class	NOT NULL
description	varchar(64)	The description of the locator	NOT NULL

sde_logfile_pool

The sde_logfile_pool table will be present in the geodatabase when it is first created, regardless of what type of log files you use. For a description of this and other log file tables, see Log file tables in a geodatabase in PostgreSQL.

sde_metadata

When you add a locator to a geodatabase in a DBMS, a row is added to the sde_metadata table for each property of the locator.

Field name	Field type	Description	Null?
record_id	integer	Unique identifier for the record	NOT NULL
object_database	varchar(32)	The name of the database in which the locator is stored
object_name	varchar(160)	The name of the locator to which the property belongs and foreign key to the name column in the sde_locators table	NOT NULL
object_owner	varchar(32)	The name of the user who owns the record	NOT NULL
object_type	integer	Always a value of 2 for locator properties	NOT NULL
class_name	varchar(32)	Always a value of SDE_internal for locator properties
property	varchar(32)	The name of the locator property
prop_value	varchar(255)	The value of the locator property
description	varchar(65)	Not used for locator properties
creation_date	timestamp without time zone	Date and time the locator property was created	NOT NULL

sde_mvtables_modified

The sde_mvtables_modified table maintains the list of all tables that are modified in each state of the database. This information aids in quickly determining if conflicts exist between versions or states of the database.

The sde_mvtables_modified table maintains a record of all tables modified by state. This information allows applications to determine which tables need to be checked for changes when reconciling potential conflicts between versions and states in the database.

Any time a feature class or table is modified in a state, a new entry is created in the sde_mvtables_modified table. When two versions are reconciled, the first step in the process is to identify the states these two versions reference—the current edit version’s state and the target version’s state. From these states, a common ancestor state is identified by tracing back through the state lineage of these two versions.

Field name	Field type	Description	Null?
state_id	bigint	The identifier of the state in which this table was modified; foreign key to the states table	NOT NULL
registration_id	integer	The registration id of the table that was modified in the state; corresponds to the table_registry table	NOT NULL

sde_object_ids

The sde_object_ids table keeps track of the types of objects present in the geodatabase.

Field name	Field type	Description	Null?
id_type	integer	ArcSDE system objects type identifier; object can be a layer, state, version, connection, registered table, raster, metadata, or locator.	NOT NULL
base_id	bigint	Starting or current object id for the object type	NOT NULL
object_type	varchar(30)	Name of ArcSDE system object	NOT NULL

sde_object_locks

The sde_object_locks table maintains locks on geodatabase objects.

Field name	Field type	Description	Null?
sde_id	integer	Process identification number of the process that locked the geodatabase object; references sde_id column in process_information table	NOT NULL
object_id	integer	Id from the gdb_items table of the affected dataset	NOT NULL
object_type	integer	Object lock type, for example, version,state_tree lock used by internal applications	NOT NULL
application_id	integer	Application unique identifier	NOT NULL
autolock	character(1)	Set to 1 if the layer lock was set internally; otherwise, set to 0, which means the layer lock was set by the application	NOT NULL
lock_type	character(1)	The type of object lock: S = shared or E = exclusive	NOT NULL
lock_time	timestamp without time zone	The date and time the object lock was acquired	NOT NULL

sde_process_information

The sde_process_information table collects ArcSDE session statistics such as the number of records read and the number of records written while the session was active.

Field name	Field type	Description	Null?
sde_id	integer	Process identification number	NOT NULL
spid	integer	The gsrvr process ID	NOT NULL
server_id	integer	The operating system process ID of the server process	NOT NULL
start_time	timestamp without time zone	Date and time process was started	NOT NULL
rcount	integer	The number of reads that have been processed	NOT NULL
wcount	integer	The number of writes that have been processed	NOT NULL
opcount	integer	Total number of operations a process has executed	NOT NULL
numlocks	integer	The number of locks that the process currently has open	NOT NULL
fb_partial	integer	Total number of partial features shipped by the process	NOT NULL
fb_count	integer	Total number of buffers loaded by the process	NOT NULL
fb_fcount	integer	Total number of features buffered by the process	NOT NULL
fb_kbytes	integer	Total number of kilobytes buffered by the process	NOT NULL
owner	varchar(30)	The name of the connected user	NOT NULL
direct_connect	varchar(1)	Indicates whether process was made with a direct connection: T (true) or F (false)	NOT NULL
sysname	varchar(32)	The operating system that the client machine is running	NOT NULL
nodename	varchar(255)	The connected client machine name	NOT NULL
xdr_needed	varchar(1)	Records whether client is using XDR to communicate with the gsrvr: T (true) or F (false)	NOT NULL

sde_raster_columns

The sde_raster_columns table contains a list of raster columns stored in the database.

This table references the raster data in the band, block, and auxiliary tables.

Field name	Field type	Description	Null?
rastercolumn_id	integer	The primary key of the raster column table	NOT NULL
description	varchar(65)	The user-defined description of the raster table
database_name	varchar(32)	Name of the database in which the raster is stored	NOT NULL
owner	varchar(32)	The owner of the raster column's business table	NOT NULL
table_name	varchar(128)	The business table name	NOT NULL
raster_column	varchar(128)	The raster column name	NOT NULL
cdate	integer	The date the raster column was added to the business table	NOT NULL
config_keyword	varchar(32)	The DBTUNE configuration keyword specified when the raster was created; determines how the tables and indexes of the raster are stored in the database
minimum_id	integer	Defined during the creation of the raster, establishes value of the raster table's raster_id column
base_rastercolumn_id	integer	When the raster column is part of a view and not a table, is the rastercolumn_id of the base table of the view	NOT NULL
rastercolumn_mask	integer	Set to 256 for a geodatabase raster	NOT NULL
srid	integer	Spatial reference identifier number; foreign key to the srid field in the sde_spatial_references table

sde_server_config

The sde_server_config table stores ArcSDE server configuration parameters. These parameters define how the ArcSDE software uses memory.

Field name	Field type	Description	Null?
prop_name	varchar(32)	The initialization parameter name	NOT NULL
char_prop_value	varchar(512)	The character value of the initialization parameter
num_prop_value	integer	The integer value of the initialization parameter

sde_spatial_references

The sde_spatial_references table contains the coordinate system and floating-point-to-integer transformation values. Internal functions use the parameters of a spatial reference system to translate and scale each floating-point coordinate of the geometry into 64-bit positive integers prior to storage. Upon retrieval, the coordinates are restored to their original external floating-point format.

Each geometry column of the sde_geometry_columns table is associated with a spatial reference system, the information for which is stored in the sde_spatial_references table. The columns of this table are those defined by the OpenGIS SQL specifications (srid, srtext, auth_name, and auth_srid) and those required by ArcSDE for internal coordinate transformation. The spatial reference system identifies the coordinate system for a geometry and gives meaning to the numeric coordinate values for the geometry.

This table is prepopulated with spatial references defined by the European Petroleum Survey Group (EPSG). The EPSG codes are used for the spatial reference identifier (SRID) to make it easier to share data across databases. Other spatial references get added to the table when you import data if the incoming spatial reference does not match an exisitng spatial reference.

Unlike the other system tables, this table is not stored in the SDE user's schema; it is stored in the public schema. This is necessary to allow you to successfully restore spatial data.

Field name	Field type	Description	Null?
srid	integer	Spatial reference identifier	NOT NULL
description	varchar(256)	The text description of the spatial reference system
falsex	numeric	The x offset used when transforming ground coordinates to internal system coordinates	NOT NULL
falsey	numeric	The y offset used when transforming ground coordinates to internal system coordinates	NOT NULL
xyunits	numeric	The scale factor to apply when transforming ground coordinates to internal system coordinates	NOT NULL
falsez	numeric	The z offset to use when transforming z values to internal system coordinates	NOT NULL
zunits	numeric	The scale factor to use when transforming z values to internal system coordinates	NOT NULL
falsem	numeric	The measure offset to use when transforming measure values to internal system coordinates	NOT NULL
munits	numeric	The scale factor to use when transforming measure values to internal system coordinates	NOT NULL
xycluster_tol	numeric	Xy-coordinate cluster tolerance for topological processing
zcluster_tol	numeric	Z-coordinate cluster tolerance for topological processing
mcluster_tol	numeric	Measure cluster tolerance for topological processing
object_flags	integer	Stores object attributes, including precision	NOT NULL
srtext	varchar(1024)	Descriptor for the spatial reference as seen in the ArcGIS interface	NOT NULL
srname	varchar(128)	Name of the spatial reference system, for example, GCS_WGS_84 or GCS_ASSUMED_GEOGRAPHIC_1
min_x	numeric	Minimum possible x-value for coordinates	NOT NULL
min_y	numeric	Minimum possible y-value for coordinates
min_z	numeric	Minimum possible z-value for coordinates
min_m	numeric	Minimum possible m-value for measures
max_x	numeric	Maximum possible x-value for coordinates	NOT NULL
max_y	numeric	Maximum possible y-value for coordinates
max_z	numeric	Maximum possible z-value for coordinates	NOT NULL
max_m	numeric	Maximum possible m-value for measures	NOT NULL
cs_id	integer	Coordinate system ID
cs_name	varchar(128)	Name of the coordinate system for this spatial reference system
cs_type	varchar(128)	Type of coordinate system: PROJECTED, GEOGRAPHIC, or UNSPECIFIED
organization	varchar(128)	Name of the organization that defined the coordinate system
org_coordsys_id	integer	Coordinate system ID defined by the organization

sde_state_lineages

The sde_state_lineages table stores the lineage of each state. A new lineage name is created for each version. Each time a state is added, the lineage name and the state ID are added. When a state is added that is a new version, the ancestry state lineage of the parent state is added with the lineage name.

To return the correct view of a version, its states lineage is queried to identify all the states that recorded each change made to that version. From this list of states, the table rows that correctly represent the version can be determined.

Field name	Field type	Description	Null?
lineage_name	bigint	Name that describes a state	NOT NULL
lineage_id	bigint	Unique identifier of individual states	NOT NULL

sde_state_locks

The sde_state_locks table maintains the version state locks.

Field name	Field type	Description	Null?
sde_id	integer	Process identification number of the process that locked the state; references sde_id column in sde_process_information table	NOT NULL
state_id	bigint	Identifier of the state that is locked	NOT NULL
autolock	character(1)	Set to 1 if the layer lock was set internally; otherwise, set to 0 if the layer lock was set by the application	NOT NULL
lock_type	character(1)	The type of state lock; the following are possible types: 0 = A shared lock on the entire state tree 1 = An exclusive lock on the entire state tree 2 = A shared lock on a state 3 = An exclusive lock on a state 4 = A shared autolock 5 = An exclusive autolock	NOT NULL
lock_time	timestamp without time zone	The date and time the state lock was acquired	NOT NULL

sde_states

The sde_states table contains the state metadata. It accounts for the states that have been created over time, and the creation time, closing time, parent, and owner of each state.

When a state is created, a state ID is assigned and a record is added to this table.

Field name	Field type	Discussion	Null?
state_id	bigint	A unique identifier for this state, assigned by ArcSDE	NOT NULL
owner	varchar(32)	The user who created this state	NOT NULL
creation_time	timestamp without time zone	The date and time this state was created	NOT NULL
closing_time	timestamp without time zone	The date and time this state was closed
parent_state_id	bigint	This state_id of the parent state	NOT NULL
lineage_name	bigint	References the state's lineage stored in the sde_state_lineages table Unique	NOT NULL

sde_table_locks

The sde_table_locks table maintains the locks on ArcSDE registered tables.

Field name	Field type	Description	Null?
sde_id	integer	Process identification number of the process that locked the table; references sde_id column in sde_process_information table	NOT NULL
registration_id	integer	References the registration_id field in the sde_table_registrytable	NOT NULL
lock_type	character(1)	The type of table lock S = Shared E = Exclusive	NOT NULL
lock_time	timestamp without time zone	The date and time the table lock was acquired	NOT NULL

sde_table_registry

The sde_table_registry table manages all registered tables. The values include an ID, table name, owner, and description.

Field name	Field type	Description	Null?
registration_id	integer	Unique identifier for the registration of the table	NOT NULL
database_name	varchar(32)	Name of the database in which the table is stored	NOT NULL
schema_name	varchar(32)	Name of the schema in which the table is stored
owner	varchar(32)	User who created the table	NOT NULL
table_name	varchar(128)	Name of the table	NOT NULL
rowid_column	varchar(32)	Name of the ObjectID column in the table
description	varchar(65)	The user-defined text description of the table
object_flags	integer	Stores the registration properties of the table, which include the following: The table has a registered row ID. ArcSDE controls the row ID. The table has a geometry column. The table is a versioned view. The table can be row locked. The table has a raster column. The table is a view of another table. The table has a geocoding locator column. Data definition language operations are restricted. Data manipulation language operations are restricted. The table is hidden. The table has single row IDs. The table has an XML column. The table has a layer that stores double coordinates. The interior states of this versioned table can be edited. This is a base save table. This table has trusted shapes. This is an archiving table. This table is in load-only I/O mode. This is a history table.	NOT NULL
registration_date	integer	The date the table was registered with ArcSDE	NOT NULL
config_keyword	varchar(32)	Configuration keyword specified when the table was registered with ArcSDE; determines the storage of the table and its indexes in the database
minimum_id	integer	The minimum row_id value of the table
imv_view_name	varchar(32)	The name of the versioned view defined on the table (if the table is registered as versioned) or the name of the view created for the nonversioned table when it is enabled for archiving

sde_tables_modified

The sde_tables_modified table records when changes are made to the system tables. This information is used to eliminate unnecessary reads of tables that have not changed.

Field name	Field type	Description	Null?
table_name	varchar(32)	Name of the ArcSDE system table that was modified	NOT NULL
time_last_modified	timestamp without time zone	Date and time the table was modified	NOT NULL

sde_version

The sde_version table maintains information about the version of ArcSDE with which the database expects to operate. The table contains the specific release identification for the most recently installed version of ArcSDE.

The sde_version table and other ArcSDE system tables are updated after a new version of ArcSDE is installed.

Field name	Field type	Description	Null?
major	integer	Number of the major release; for example, for ArcSDE 9.3, the major release number is 9.	NOT NULL
minor	integer	Number indicating the version of the minor release; for example, for ArcSDE 9.3, the minor release number is 3.	NOT NULL
bugfix	integer	Number of the patch or service pack installed	NOT NULL
description	varchar(96)	System-defined description of the ArcSDE installation	NOT NULL
release	integer	Complete release number, for example, 92009	NOT NULL
sdesvr_rel_low	integer	Indicates the lowest release number of server allowed to run on this instance	NOT NULL

sde_versions

The sde_versions table contains information about versioned geodatabases.

Each version is identified by a name, with an owner, description, and associated database state. This table defines the different versions that the database contains and provides a list of available versions to be presented to the user. These versions are used to access specific database states by the application. The version name and ID are unique.

When the sde_versions table is first created by ArcSDE, a default version is inserted into the table. This default version is named DEFAULT, is owned by the ArcSDE administrator, and is granted PUBLIC access. The initial state_id is set to 0, and the description string reads Instance Default Version. Since the default version has been granted PUBLIC access, any user can change the state of the default.

Field name	Field type	Description	Null?
name	varchar(64)	The unique name of the version	NOT NULL
owner	varchar(32)	The version owner	NOT NULL
version_id	integer	The unique identifier of the version	NOT NULL
status	integer	Specifies whether the version is available to the public or if it is privately accessed by the owner	NOT NULL
state_id	bigint	The identifier of the database state to which this version points	NOT NULL
description	varchar(65)	An optional text description of the version
parent_name	varchar(64)	The name of the parent of this version
parent_owner	varchar(32)	The name of the owner of the parent version
parent_version_id	integer	The identifier of the version that is the parent of this version
creation_time	timestamp without time zone	The date and time that this version was created	NOT NULL

sde_xml_columns

When you add an ArcSDE XML column to a business table, a row is added to the XML columns table. This table occurs once in each ArcSDE geodatabase.

Field name	Field type	Description	Null?
column_id	integer	The XML column's identifier; assigned by ArcSDE at the time the XML column is created	NOT NULL
registration_id	integer	The identifier of the business table containing the XML column; corresponds to the id column in the sde_table_registry table	NOT NULL
column_name	varchar(32)	Name of the XML column in the business table	NOT NULL
index_id	integer	The identifier of the XPath index associated with the XML column, if one exists; a foreign key to the XML indexes table
minimum_id	integer	The value of the initial number used in the business table's XML column to identify individual XML documents
config_keyword	varchar(32)	The DBTUNE configuration keyword containing parameters that determine how the XML document and the XML XPath index tables and the text indexes created on those tables are defined in the database
xflags	integer	A value indicating whether the original documents in the XML document table are stored compressed or decompressed; compressed by default (Compressed documents provide better performance.)

sde_xml_index_tags

An ArcSDE XML column can optionally have an XPath index, which lets people search the content of a specific XML element or attribute in each document. The definition of which elements and attributes are included in or excluded from each XPath index is recorded in this table.

This table occurs once in each ArcSDE database. It contains one row for each XPath associated with the XPath index of an ArcSDE XML column.

Field name	Field type	Description	Null?
index_id	integer	The identifier of the XPath index associated with an ArcSDE XML column, if one exists; foreign key to the XML indexes table	NOT NULL
tag_id	integer	The identifier of an XPath or tag	NOT NULL
tag_name	varchar(1024)	An absolute XPath identifying an XML element or attribute that may occur in an XML document (For example, /metadata/mdDateSt identifies an XML element, and /metadata/dataIdInfo/tpCat/TopicCatCd/@value identifies an XML attribute. These XPaths must not contain asterisks [*] to refer to a group of XML elements or attributes—each element or attribute is matched exactly using the XPaths specified in this table.)	NOT NULL
data_type	integer	A value indicating whether the XML element or attribute will be indexed as a string or a number 1 = The content of the tag will be indexed as text. 2 = The content will be indexed as a number.	NOT NULL
tag_alias	integer	A number that can be used to identify an XPath (For example, the Z39.50 communication protocol uses numeric codes to refer to content that may be searched. This column is not used by the ArcIMS Z39.50 Connector.)
description	varchar(64)	Text identifying the content that should be contained in the XML element or attribute
is_excluded	integer	A value indicating whether the XML element is included in or excluded from the XPath index 0 = included 1 = excluded	NOT NULL

sde_xml_indexes

This table occurs once in each ArcSDE database. It contains one row for each ArcSDE XML column that has an XPath index.

Field name	Field type	Description	Null?
index_id	integer	The identifier of the XPath index	NOT NULL
index_name	varchar(32)	The name of the XPath index For XPath indexes associated with an ArcIMS Metadata Service, the name will be ims_xml#, where # is the identifier of the XML column in the Metadata Service's business table.	NOT NULL
owner	varchar(32)	The database user who owns the XML column For ArcIMS Metadata Services, this is the user specified in the service's ArcXML configuration file.	NOT NULL
index_type	integer	A value indicating the type of XPath index 1 = index type SE_XML_INDEX_TEMPLATE 2 = index type SE_XML_INDEX_DEFINITION	NOT NULL
description	varchar(64)	Text identifying the XPath index If an index definition file was used to create the index, the index's description might be specified at the top of the file.

st_coordinate_systems

The st_coordinate_systems table contains all coordinate systems registered with the spatial type. This table is updated when ArcSDE is installed and upgraded.

Field name	Field type	Description	Null?
name	varchar(128)	Coordinate system name
type	varchar(128)	Type of coordinate system: PROJECTED, GEOGRAPHIC, or UNSPECIFIED
definition	varchar(2048)	Well-known text description of the coordinate system
organization	varchar(128)	Name of the organization that defined the coordinate system
id	integer	Coordinate system ID defined by the organization	NOT NULL
description	varchar(256)	Description for the coordinate system indicating its application

st_units_of_measure

The st_units_of_measure table stores information about how the values in the spatial column are measured.

Field name	Field type	Description	Null?
unit_name	varchar(128)	Name of the unit of measure	NOT NULL
unit_type	varchar(128)	Type of the unit of measure; for example, LINEAR or ANGULAR	NOT NULL
conversion_factor	double precision	Numeric value used to convert this unit of measure to its base unit; for example, the base unit for linear is METER, and for angular, it is RADIAN.	NOT NULL
description	varchar(256)	Description of the unit of measure