# Show command

#### Syntax

    SHOW
    {
       CONNECTIONS |
       INDEXES [ IN schemaName | FROM table-Name ] |
       PROCEDURES [ IN schemaName ] |
       ROLES |
       ENABLED_ROLES |
       SETTABLE_ROLES |
       SCHEMAS |
       SYNONYMS [ IN schemaName ] |
       TABLES [ IN schemaName ] |
       VIEWS [ IN schemaName ] |

    }

#### Description

The SHOW command can be used to display information about active connections and database objects.

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 * after its name.

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 INDEXES

SHOW INDEXES displays all the indexes in the database.

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

If `FROM table-Name` is specified, then only the indexes on the specified table are displayed.

Example

    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

SHOW PROCEDURES 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.

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, SHOW SETTABLE_ROLES

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

SHOW ENABLED_ROLES 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 Developer's Guide.)

SHOW SETTABLE_ROLES 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.

Example

    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

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

SHOW SCHEMAS

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

Example

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

    11 rows selected

SHOW SYNONYMS

SHOW SYNONYMS 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.

Example

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

SHOW TABLES

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

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

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

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

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

Example

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

    1 row selected

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