Rebuild system table indexes—Geodatabases in Db2

Available with Standard or Advanced license.

Use the Rebuild Indexes tool
Schedule a Python script

The database uses indexes to quickly identify rows that meet a query's predicate filter. Most of the geodatabase system tables have indexes, but the tables that tend to have the greatest amount of change in a versioned enterprise geodatabase and, therefore, require the indexes to be rebuilt most often are the states, state_lineages, and mv_tables_modified system tables. As the geodatabase administrator, you can rebuild the indexes on these tables in geodatabases in IBM Db2, Microsoft SQL Server, Oracle, or PostgreSQL using the Rebuild Indexes geoprocessing tool.

In a heavily edited versioned (traditional) geodatabase, you might update indexes on the states, state_lineages, and mv_tables_modified tables nightly. To do that, create a stand-alone Python script that calls the Rebuild Indexes tool and schedule it to run using Windows Scheduled Tasks or a cron job.

Use the Rebuild Indexes tool

To rebuild indexes on the states, state_lineages, and mv_tables_modified geodatabase system tables using the Rebuild Indexes tool, do the following:

Start an ArcGIS Desktop client and connect to the geodatabase as the geodatabase administrator.
Open the Rebuild Indexes geoprocessing tool.
This tool can be found in the Geodatabase Administration toolset of the Data Management toolbox.
Use the connection you created in step 1 as the Input Database Connection.
Check the Include System Tables check box.
Uncheck Rebuild Delta Tables Only.
Click OK (ArcMap) or Run (ArcGIS Pro).

Schedule a Python script

To run the script, you must be able to connect to the geodatabase as the geodatabase administrator. You can either create a connection file (.sde) and point to that from the script or type the connection information directly in the script. Next, schedule the script to run using Windows Scheduled Tasks or the Linux cron daemon.

Copy one of the following scripts to a computer where Python and one of the following ArcGIS products are installed:

ArcGIS Desktop (Desktop Standard or Desktop Advanced)
ArcGIS Engine with the Geodatabase Update extension
ArcGIS Server

Alter the scripts with information specific to your site.

This sample script contains the information necessary to connect to an Oracle database to update the indexes on the states, state_lineages, and mv_tables_modified system tables:

# Name: RSysIdxOracle.py
# Description: Rebuilds indexes on the states, state_lineages,
# and mv_tables_modified tables in an enterprise geodatabase
# in Oracle.

# Import system modules
import sys
import arcpy
import os

# Provide connection information
platform = ORACLE
instance = "myserver/orcl"
account_authentication = OPERATING_SYSTEM_AUTH | DATABASE_AUTH
#Leave username and password blank if using OPERATING_SYSTEM_AUTH
username = gdb_admin
password = gdb_admin_password


# Set local variables
if os.name.lower() == "nt":
   slashsyntax = "\\"
   if os.environ.get("TEMP") == None:
      temp = "c:\\temp"
   else:
      temp = os.environ.get("TEMP")
else:
   slashsyntax = "/"
   if os.environ.get("TMP") == None:
      temp = "/usr/tmp"
   else:
      temp = os.environ.get("TMP")

Connection_File_Name = temp + slashsyntax + "connection.sde"

# Check for the .sde file and delete it if present
if os.path.exists(Connection_File_Name):
   os.remove(Connection_File_Name)

#Variable defined within the script; other variable options commented out at the end of the line
saveUserInfo = "SAVE_USERNAME" #DO_NOT_SAVE_USERNAME

print ("Creating Database Connection File...")
# Create Database Connection File
# Usage: out_folder_path, out_name, database_platform, instance, account_authentication, username, password, save_user_pass
arcpy.CreateDatabaseConnectionFile_management(temp, "connection.sde", platform, instance, account_authentication, username, password, saveUserInfo)

# Rebuild indexes on system tables
arcpy.RebuildIndexes_management(Connection_File_Name, "SYSTEM", "", "ALL")
print ("Rebuild Complete")

This sample script contains information to use an operating system authenticated dbo user to connect to SQL Server and update indexes on the sde_states, sde_state_lineages, and sde_mv_tables_modified system tables:

# Name: RSysIdxSqlServer.py
# Description: Rebuilds indexes on the sde_states, sde_state_lineages,
# and sde_mv_tables_modified tables in an enterprise geodatabase
# in SQL Server.

# Import system modules
import sys
import arcpy
import os

# Provide connection information
platform = SQL_SERVER
instance = sqlserver_instance_name
account_authentication = OPERATING_SYSTEM_AUTH
database = database_name


# Set local variables
if os.name.lower() == "nt":
   slashsyntax = "\\"
   if os.environ.get("TEMP") == None:
      temp = "c:\\temp"
   else:
      temp = os.environ.get("TEMP")
else:
   slashsyntax = "/"
   if os.environ.get("TMP") == None:
      temp = "/usr/tmp"
   else:
      temp = os.environ.get("TMP")

Connection_File_Name = temp + slashsyntax + "connection.sde"

# Check for the .sde file and delete it if present
if os.path.exists(Connection_File_Name):
   os.remove(Connection_File_Name)

print ("Creating Database Connection File...")
# Create Database Connection File
# Usage: out_folder_path, out_name, database_platform, instance, account_authentication, database
arcpy.CreateDatabaseConnectionFile_management(temp, "connection.sde", platform, instance, account_authentication, database)

# Rebuild indexes on system tables
arcpy.RebuildIndexes_management(Connection_File_Name, "SYSTEM", "", "ALL")
print ("Rebuild Complete")

In this example, the sde user connects to a PostgreSQL database:

# Name: RSysIdxpg.py
# Description: Rebuilds indexes on the sde_states, sde_state_lineages,
# and sde_mv_tables_modified tables in an enterprise geodatabase
# in PostgreSQL.

# Import system modules
import sys
import arcpy
import os

# Provide connection information
platform = POSTGRESQL
instance = pg_cluster
account_authentication = DATABASE_AUTH
username = gdb_admin
password = gdb_admin_password
database = database_name


# Set local variables
if os.name.lower() == "nt":
   slashsyntax = "\\"
   if os.environ.get("TEMP") == None:
      temp = "c:\\temp"
   else:
      temp = os.environ.get("TEMP")
else:
   slashsyntax = "/"
   if os.environ.get("TMP") == None:
      temp = "/usr/tmp"
   else:
      temp = os.environ.get("TMP")

Connection_File_Name = temp + slashsyntax + "connection.sde"

# Check for the .sde file and delete it if present
if os.path.exists(Connection_File_Name):
   os.remove(Connection_File_Name)

#Variable defined within the script; other variable options commented out at the end of the line
saveUserInfo = "SAVE_USERNAME" #DO_NOT_SAVE_USERNAME

print ("Creating Database Connection File...")
# Create Database Connection File
# Usage: out_folder_path, out_name, database_platform, instance, account_authentication, username, password, save_user_pass, database
arcpy.CreateDatabaseConnectionFile_management(temp, "connection.sde", platform, instance, account_authentication, username, password, saveUserInfo, database)

# Rebuild indexes on system tables
arcpy.RebuildIndexes_management(Connection_File_Name, "SYSTEM", "", "ALL")
print ("Rebuild Complete")

In this example, the sde user connects to a DB2 database:

# Name: RSysIdxDb2.py
# Description: Rebuilds indexes on the states, state_lineages,
# and mv_tables_modified tables in an enterprise geodatabase
# in DB2.

# Import system modules
import sys
import arcpy
import os

# Provide connection information
platform = DB2
instance = db2gdb
account_authentication = OPERATING_SYSTEM_AUTH | DATABASE_AUTH
#Leave username and password blank if using OPERATING_SYSTEM_AUTH
username = sde
password = gdb_admin_password


# Set local variables
if os.name.lower() == "nt":
   slashsyntax = "\\"
   if os.environ.get("TEMP") == None:
      temp = "c:\\temp"
   else:
      temp = os.environ.get("TEMP")
else:
   slashsyntax = "/"
   if os.environ.get("TMP") == None:
      temp = "/usr/tmp"
   else:
      temp = os.environ.get("TMP")

Connection_File_Name = temp + slashsyntax + "connection.sde"

# Check for the .sde file and delete it if present
if os.path.exists(Connection_File_Name):
   os.remove(Connection_File_Name)

#Variable defined within the script; other variable options commented out at the end of the line
saveUserInfo = "SAVE_USERNAME" #DO_NOT_SAVE_USERNAME

print ("Creating Database Connection File...")
# Create Database Connection File
# Usage: out_folder_path, out_name, database_platform, instance, account_authentication, username, password, save_user_pass
arcpy.CreateDatabaseConnectionFile_management(temp, "connection.sde", platform, instance, account_authentication, username, password, saveUserInfo)

# Rebuild indexes on system tables
arcpy.RebuildIndexes_management(Connection_File_Name, "SYSTEM", "", "ALL")
print ("Rebuild Complete")

After you alter the script to contain your connection information, schedule the script to run at a specific time each night.
- On Windows, open Scheduled Tasks from the Control Panel and use the wizard to add a scheduled task. When asked what program to run, browse to your Python script.
- On Linux, create a cron text file that contains information on the day and time you want the script to run, and load the file into cron using the crontab program.
  For example, the following information sets the Python script (named rsysidxdb2.py) to run every Wednesday at 10:00 p.m.:
```
0 22 * * 3 /usr/bin/rsysidxdb2.py
```
  See the Linux man pages provided with your Linux installation for information on using cron.