Show command

The Show command displays information about active connections and database objects.

Syntax

SHOW
{
   CONNECTIONS |
   FUNCTIONS [ IN schemaName ] |
   INDEXES [ IN schemaName | FROM tableName ] |
   PROCEDURES [ IN schemaName ] |
   ROLES |
   ENABLED_ROLES |
   SETTABLE_ROLES |
   SCHEMAS |
   SYNONYMS [ IN schemaName ] |
   TABLES [ IN schemaName ] |
   VIEWS [ IN schemaName ] |

}

SHOW CONNECTIONS

If there are no connections, the SHOW CONNECTIONS command returns "No connections available".

Otherwise, the command displays a list of connection names and the URLs used to connect to them. The currently active connection, if there is one, is marked with an asterisk (*) after its name.

SHOW CONNECTIONS Example

ij> connect 'sample' as sample1;
ij> connect 'newDB;create=true' as newDB;
ij(NEWDB)> show connections;
SAMPLE1 -        jdbc:derby:sample
NEWDB* -        jdbc:derby:newDB;create=true
* = current connection
ij(NEWDB)>

SHOW FUNCTIONS

The SHOW FUNCTIONS command displays all functions in the database. By default, both system functions and user-defined functions appear in the output.

If IN schemaName is specified, only the functions in the specified schema are displayed.

SHOW FUNCTIONS Example

If you created the TO_DEGREES function described in "CREATE FUNCTION statement" in the Derby Reference Manual, the output of the CREATE FUNCTION statement and the SHOW FUNCTIONS command would look something like the following:

ij> connect 'jdbc:derby:firstdb';
ij> CREATE FUNCTION TO_DEGREES ( RADIANS DOUBLE )
> RETURNS DOUBLE
> PARAMETER STYLE JAVA
> NO SQL LANGUAGE JAVA
> EXTERNAL NAME 'java.lang.Math.toDegrees';
0 rows inserted/updated/deleted
ij> show functions in app;
FUNCTION_SCHEM|FUNCTION_NAME               |REMARKS
-------------------------------------------------------------------------
APP           |TO_DEGREES                  |java.lang.Math.toDegrees           

1 row selected

SHOW INDEXES

The SHOW INDEXES command displays all the indexes in the database.

If IN schemaName is specified, only the indexes in the specified schema are displayed.

If FROM tableName is specified, only the indexes on the specified table are displayed.

SHOW INDEXES Examples

ij> show indexes in app;
TABLE_NAME          |COLUMN_NAME         |NON_U&|TYPE|ASC&|CARDINA&|PAGES
----------------------------------------------------------------------------
AIRLINES            |AIRLINE             |false |3   |A   |NULL    |NULL
COUNTRIES           |COUNTRY_ISO_CODE    |false |3   |A   |NULL    |NULL
COUNTRIES           |COUNTRY             |false |3   |A   |NULL    |NULL
CITIES              |CITY_ID             |false |3   |A   |NULL    |NULL
FLIGHTS             |FLIGHT_ID           |false |3   |A   |NULL    |NULL
FLIGHTS             |SEGMENT_NUMBER      |false |3   |A   |NULL    |NULL
FLIGHTAVAILABILITY  |FLIGHT_ID           |false |3   |A   |NULL    |NULL
FLIGHTAVAILABILITY  |SEGMENT_NUMBER      |false |3   |A   |NULL    |NULL
FLIGHTAVAILABILITY  |FLIGHT_DATE         |false |3   |A   |NULL    |NULL
MAPS                |MAP_ID              |false |3   |A   |NULL    |NULL
MAPS                |MAP_NAME            |false |3   |A   |NULL    |NULL
FLIGHTS             |DEST_AIRPORT        |true  |3   |A   |NULL    |NULL
FLIGHTS             |ORIG_AIRPORT        |true  |3   |A   |NULL    |NULL
CITIES              |COUNTRY_ISO_CODE    |true  |3   |A   |NULL    |NULL
FLIGHTAVAILABILITY  |FLIGHT_ID           |true  |3   |A   |NULL    |NULL
FLIGHTAVAILABILITY  |SEGMENT_NUMBER      |true  |3   |A   |NULL    |NULL

16 rows selected
ij> show indexes from flights;
TABLE_NAME          |COLUMN_NAME         |NON_U&|TYPE|ASC&|CARDINA&|PAGES
----------------------------------------------------------------------------
FLIGHTS             |FLIGHT_ID           |false |3   |A   |NULL    |NULL
FLIGHTS             |SEGMENT_NUMBER      |false |3   |A   |NULL    |NULL
FLIGHTS             |DEST_AIRPORT        |true  |3   |A   |NULL    |NULL
FLIGHTS             |ORIG_AIRPORT        |true  |3   |A   |NULL    |NULL

4 rows selected

SHOW PROCEDURES

The SHOW PROCEDURES command displays all the procedures in the database that have been created with the CREATE PROCEDURE statement, as well as system procedures.

If IN schemaName is specified, only procedures in the specified schema are displayed.

SHOW PROCEDURES Example

ij> show procedures in syscs_util;
PROCEDURE_SCHEM     |PROCEDURE_NAME                |REMARKS
------------------------------------------------------------------------
SYSCS_UTIL          |SYSCS_BACKUP_DATABASE         |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_BACKUP_DATABASE_AND_ENA&|org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_BACKUP_DATABASE_AND_ENA&|org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_BACKUP_DATABASE_NOWAIT  |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_BULK_INSERT             |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_CHECKPOINT_DATABASE     |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_COMPRESS_TABLE          |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_DISABLE_LOG_ARCHIVE_MODE|org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_EXPORT_QUERY            |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_EXPORT_TABLE            |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_FREEZE_DATABASE         |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_IMPORT_DATA             |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_IMPORT_TABLE            |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_INPLACE_COMPRESS_TABLE  |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_SET_DATABASE_PROPERTY   |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_SET_RUNTIMESTATISTICS   |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_SET_STATISTICS_TIMING   |org.apache.derby.ca&
SYSCS_UTIL          |SYSCS_UNFREEZE_DATABASE       |org.apache.derby.ca&

18 rows selected

SHOW ROLES, SHOW ENABLED_ROLES, and SHOW SETTABLE_ROLES

The SHOW ROLES command displays the names of all roles created, whether settable for the current session or not.

The SHOW ENABLED_ROLES command displays the names of all the roles whose privileges are available for the current session. That is, it shows the current role and any role contained in the current role. (For a definition of role containment, see "Using SQL roles" in the Derby Security Guide.)

The SHOW SETTABLE_ROLES command displays all the roles that the current session can set, that is, all roles that have been granted to the current user or to PUBLIC.

The roles shown by these commands are sorted in ascending order.

SHOW ROLES, SHOW ENABLED_ROLES, and SHOW SETTABLE_ROLES Examples

In the following examples, both CASUALUSER and POWERUSER contain ANYUSER, but ANYUSER is not settable directly.

ij> show roles;
ROLEID                        
------------------------------
ANYUSER                             
CASUALUSER                             
POWERUSER                             

3 rows selected
ij> show enabled_roles;
ROLEID                        
------------------------------
ANYUSER                             
CASUALUSER                             

2 rows selected
ij> show settable_roles;
ROLEID                        
------------------------------
CASUALUSER                             
POWERUSER

2 rows selected

SHOW SCHEMAS

The SHOW SCHEMAS command displays all of the schemas in the current connection.

SHOW SCHEMAS Example

ij> show schemas;
TABLE_SCHEM
------------------------------
APP
NULLID
SQLJ
SYS
SYSCAT
SYSCS_DIAG
SYSCS_UTIL
SYSFUN
SYSIBM
SYSPROC
SYSSTAT

11 rows selected

SHOW SYNONYMS

The SHOW SYNONYMS command displays all the synonyms in the database that have been created with the CREATE SYNONYMS statement.

If IN schemaName is specified, only synonyms in the specified schema are displayed.

SHOW SYNONYMS Example

ij> show synonyms;
TABLE_SCHEM         |TABLE_NAME                    |REMARKS
------------------------------------------------------------------------
APP                 |MYAIRLINES                    |

SHOW TABLES

The SHOW TABLES command displays all of the tables in the current schema.

If IN schemaName is specified, the tables in the given schema are displayed.

SHOW TABLES Example

ij> show tables;
TABLE_SCHEM         |TABLE_NAME                    |REMARKS
------------------------------------------------------------------------
APP                 |AIRLINES                      |
APP                 |CITIES                        |
APP                 |COUNTRIES                     |
APP                 |FLIGHTAVAILABILITY            |
APP                 |FLIGHTS                       |
APP                 |FLIGHTS_HISTORY               |
APP                 |MAPS                          |

7 rows selected

SHOW VIEWS

The SHOW VIEWS command displays all of the views in the current schema.

If IN schemaName is specified, the views in the given schema are displayed.

SHOW VIEWS Example

ij> show views;
TABLE_SCHEM         |TABLE_NAME                    |REMARKS
------------------------------------------------------------------------
APP                 |TOTALSEATS                    |

1 row selected