SHOW

Use SHOW commands to get information about databases, tables, and user sessions.

SHOW CREATE SERVER

Shows the CREATE SERVER statement that could have been used to create the server.

Syntax

SHOW CREATE SERVER <servername>

Example

SHOW CREATE SERVER default_local_delimited;
create_server_sql
CREATE SERVER default_local_delimited FOREIGN DATA WRAPPER DELIMITED_FILE
WITH (STORAGE_TYPE='LOCAL_FILE');

SHOW CREATE TABLE

Shows the CREATE TABLE statement that could have been used to create the table.

Syntax

SHOW CREATE TABLE <tablename>

Example

SHOW CREATE TABLE heavyai_states;
CREATE TABLE heavyai_states (
 id TEXT ENCODING DICT(32),
 abbr TEXT ENCODING DICT(32),
 name TEXT ENCODING DICT(32),
 omnisci_geo GEOMETRY(MULTIPOLYGON, 4326
) NOT NULL);

SHOW DATABASES

Retrieve the databases accessible for the current user, showing the database name and owner.

Example

SHOW DATABASES
Database         Owner
omnisci          admin
2004_zipcodes    admin
game_results     jane
signals          jason
...

SHOW FUNCTIONS

Show registered compile-time UDFs and extension functions in the system and their arguments.

Syntax

SHOW FUNCTIONS [DETAILS]

Example

SHOW FUNCTIONS
Scalar UDF
distance_point_line
ST_DWithin_Polygon_Polygon
ST_Distance_Point_ClosedLineString
Truncate
ct_device_selection_udf_any
area_triangle
_h3RotatePent60cw
ST_Intersects_Polygon_Point
ST_DWithin_LineString_Polygon
ST_Intersects_Point_Polygon
box_contains_box

SHOW POLICIES

Displays a list of all row-level security (RLS) policies that exist for a user or role; admin rights are required. If EFFECTIVE is used, the list also includes any policies that exist for all roles that apply to the requested user or role.

Syntax

SHOW [EFFECTIVE] POLICIES <name>;

SHOW QUERIES

Returns a list of queued queries in the system; information includes session ID, status, query string, account login name, client address, database name, and device type (CPU or GPU).

Example

show queries;
query_session_id|current_status|submitted          |query_str                                                   |login_name|client_address     |db_name   |exec_device_type
834-8VAA        |Pending       |2020-05-06 08:21:15|select d_date_sk, count(1) from date_dim group by d_date_sk;|admin     |tcp:localhost:48596|tpcds_sf10|CPU
826-CLKk        |Running       |2020-05-06 08:20:57|select count(1) from store_sales, store_returns;            |admin     |tcp:localhost:48592|tpcds_sf10|CPU
828-V6s7        |Pending       |2020-05-06 08:21:13|select count(1) from store_sales;                           |admin     |tcp:localhost:48594|tpcds_sf10|GPU
946-rtJ7        |Pending       |2020-05-06 08:20:58|select count(1) from item;                                  |admin     |tcp:localhost:48610|tpcds_sf10|GPU

Admin users can see and interrupt all queries, and non-admin users can see and interrupt only their own queries

NOTE: SHOW QUERIES is only available if the runtime query interrupt parameter (enable-runtime-query-interrupt) is set.

To interrupt a query in the queue, see KILL QUERY.

SHOW ROLES

If included with a name, lists the role granted directly to a user or role. SHOW EFFECTIVE ROLES with a name lists the roles directly granted to a user or role, and also lists the roles indirectly inherited through the directly granted roles.

Syntax

SHOW [EFFECTIVE] ROLES <name>

If the user name or role name is omitted, then a regular user sees their own roles, and a superuser sees a list of all roles existing in the system.

SHOW RUNTIME FUNCTIONS

Show user-defined runtime functions and table functions.

Syntax

SHOW RUNTIME [TABLE] FUNCTIONS
SHOW RUNTIME [TABLE] FUNCTION DETAILS

SHOW SUPPORTED DATA SOURCES

Show data connectors.

Syntax

show supported data sources

SHOW TABLE DETAILS

Displays storage-related information for a table, such as the table ID/name, number of data/metadata files used by the table, total size of data/metadata files, and table epoch values.

You can see table details for all tables that you have access to in the current database, or for only those tables you specify.

Syntax

SHOW TABLE DETAILS [<table-name>, <table-name>, ...]

Examples

Show details for all tables you have access to:

omnisql> show table details;
table_id|table_name       |column_count|is_sharded_table|shard_count|max_rows           |fragment_size|max_rollback_epochs|min_epoch|max_epoch|min_epoch_floor|max_epoch_floor|metadata_file_count|total_metadata_file_size|total_metadata_page_count|total_free_metadata_page_count|data_file_count|total_data_file_size|total_data_page_count|total_free_data_page_count
1       |heavyai_states   |11          |false           |0          |4611686018427387904|32000000     |-1                 |1        |1        |0              |0              |1                  |16777216                |4096                     |4082                          |1              |536870912           |256                  |242
2       |heavyai_counties |13          |false           |0          |4611686018427387904|32000000     |-1                 |1        |1        |0              |0              |1                  |16777216                |4096                     |NULL                          |1              |536870912           |256                  |NULL
3       |heavyai_countries|71          |false           |0          |4611686018427387904|32000000     |-1                 |1        |1        |0              |0              |1                  |16777216                |4096                     |4022                          |1              |536870912           |256                  |182

Show details for table omnisci_states:

omnisql> show table details heavyai_states;
table_id|table_name    |column_count|is_sharded_table|shard_count|max_rows           |fragment_size|max_rollback_epochs|min_epoch|max_epoch|min_epoch_floor|max_epoch_floor|metadata_file_count|total_metadata_file_size|total_metadata_page_count|total_free_metadata_page_count|data_file_count|total_data_file_size|total_data_page_count|total_free_data_page_count
1       |heavyai_states|11          |false           |0          |4611686018427387904|32000000     |-1                 |1        |1        |0              |0              |1                  |16777216                |4096                     |4082                          |1              |536870912           |256                  |242

The number of columns returned includes system columns. As a result, the number of columns in column_count can be up to two greater than the number of columns created by the user.

SHOW TABLE FUNCTIONS

Displays the list of available system (built-in) table functions.

SHOW TABLE FUNCTIONS;
tf_compute_dwell_times
tf_feature_self_similarity
tf_feature_similarity
tf_rf_prop
tf_rf_prop_max_signal
tf_geo_rasterize_slope
tf_geo_rasterize
generate_random_strings
generate_series
tf_mandelbrot_cuda_float
tf_mandelbrot_cuda
tf_mandelbrot_float
tf_mandelbrot

For more information, see System Table Functions.

SHOW TABLE FUNCTIONS DETAILS

Show detailed output information for the specified table function. Output details vary depending on the table function specified.

Syntax

SHOW TABLE FUNCTIONS DETAILS <function_name>

Example - generate_series

View SHOW output for the generate_series table function:

Output Header
Output Details

name

generate_series

signature

(i64 series_start, i64 series_stop, i64 series_step) (i64 series_start, i64 series_stop) -> Column

input_names

series_start, series_stop, series_step series_start, series_stop

input_types

i64

output_names

generate_series

output_types

Column i64

CPU

true

GPU

true

runtime

false

filter_table_transpose

false

SHOW SERVERS

Retrieve the servers accessible for the current user.

Example

SHOW SERVERS;
server_name|data_wrapper|created_at|options
default_local_delimited|DELIMITED_FILE|2022-03-15 10:06:05|{"STORAGE_TYPE":"LOCAL_FILE"}
default_local_parquet|PARQUET_FILE|2022-03-15 10:06:05|{"STORAGE_TYPE":"LOCAL_FILE"}
default_local_regex_parsed|REGEX_PARSED_FILE|2022-03-15 10:06:05|{"STORAGE_TYPE":"LOCAL_FILE"}
...

SHOW TABLES

Retrieve the tables accessible for the current user.

Example

SHOW TABLES;
table_name
----------
omnisci_states
omnisci_counties
omnisci_countries
streets_nyc
streets_miami
...

SHOW USER DETAILS

Lists name, ID, and default database for all or specified users for the current database. If the command is issued by a superuser, login permission status is also shown. Only superusers see users who do not have permission to log in.

Example

SHOW USER DETAILS
NAME            ID         DEFAULT_DB 
mike.nuumann    191        mondale
Dale            184        churchill
Editor_Test     141        mondale
Jerry.wong      181        alluvial
AA_superuser    139        
BB_superuser    2140
PlinyTheElder   183        windsor
aaron.tyre      241        db1
achristie       243        sid
eve.mandela     202        nancy
...

SHOW [ALL] USER DETAILS lists name, ID, superuser status, default database, and login permission status for all users across the HeavyDB instance. This variant of the command is available only to superusers. Regular users who run the SHOW ALL USER DETAILS command receive an error message.

Superuser Output

Show all user details for all users:

heavysql> show all user details;
NAME|ID|IS_SUPER|DEFAULT_DB|CAN_LOGIN
admin|0|true|(-1)|true
ua|2|false|db1(2)|true
ub|3|false|db1(2)|true
uc|4|false|db1(2)|false
ud|5|false|db2(3)|true
ue|6|false|db2(3)|true
uf|7|false|db2(3)|false

Show all user details for specified users ue, ud, ua, and uf:

heavysql> \db db2
User admin switched to database db2

heavysql> show all user details ue, ud, uf, ua;
NAME|ID|IS_SUPER|DEFAULT_DB|CAN_LOGIN
ua|2|false|db1(2)|true
ud|5|false|db2(3)|true
ue|6|false|db2(3)|true
uf|7|false|db2(3)|false

If a specified user is not found, the superuser sees an error message:

heavysql> show user details ue, ud, uf, ua;
User "ua" not found.

Show user details for specified users ue, ud, and uf:

heavysql> show user details ue, ud, uf;
NAME|ID|DEFAULT_DB|CAN_LOGIN
ud|5|db2(3)|true
ue|6|db2(3)|true
uf|7|db2(3)|false

Show user details for all users:

heavysql> show user details;
NAME|ID|DEFAULT_DB|CAN_LOGIN
ud|5|db2(3)|true
ue|6|db2(3)|true
uf|7|db2(3)|false

Non-Superuser Output

Running SHOW ALL USER DETAILS results in an error message:

heavysql> \db
User ua is using database db1
heavysql> show all user details;
SHOW ALL USER DETAILS is only available to superusers. (Try SHOW USER DETAILS instead?)

Show user details for all users:

heavysql> show user details;
NAME|ID|DEFAULT_DB
ua|2|db1
ub|3|db1

If a specified user is not found, the user sees an error message:

heavysql> show user details ua, ub, uc;
User "uc" not found.

Show user details for user ua:

heavysql> show user details ua;
NAME|ID|DEFAULT_DB
ua|2|db1

SHOW USER SESSIONS

Retrieve all persisted user sessions, showing the session ID, user login name, client address, and database name. Admin or superuser privileges required.

SHOW USER SESSIONS;
session_id   login_name   client_address         db_name
453-X6ds     mike         http:198.51.100.1      game_results
453-0t2r     erin         http:198.51.100.11     game_results
421-B64s     shauna       http:198.51.100.43     game_results
213-06dw     ahmed        http:198.51.100.12     signals
333-R28d     cat          http:198.51.100.233    signals
497-Xyz6     inez         http:198.51.100.5      ships
...

KILL QUERY

Interrupt a queued query. Specify the query by using its session ID.

To see the queries in the queue, use the SHOW QUERIES command:

show queries;
query_session_id|current_status      |executor_id|submitted     |query_str       |login_name|client_address            |db_name|exec_device_type
713-t1ax        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |John      |http:::1                  |omnisci|GPU
491-xpfb        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |Patrick   |http:::1                  |omnisci|GPU
451-gp2c        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |John      |http:::1                  |omnisci|GPU
190-5pax        |PENDING_EXECUTOR    |1          |2021-08-03 ...|SELECT ...      |Cavin     |http:::1                  |omnisci|GPU
720-nQtV        |RUNNING_QUERY_KERNEL|2          |2021-08-03 ...|SELECT ...      |Cavin     |tcp:::ffff:127.0.0.1:50142|omnisci|GPU
947-ooNP        |RUNNING_IMPORTER    |0          |2021-08-03 ...|IMPORT_GEO_TABLE|Rio       |tcp:::ffff:127.0.0.1:47314|omnisci|CPU

To interrupt the last query in the list (ID 946-ooNP):

kill query '946-ooNP'

Showing the queries again indicates that 946-ooNP has been deleted:

show queries;
query_session_id|current_status      |executor_id|submitted     |query_str       |login_name|client_address            |db_name|exec_device_type
713-t1ax        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |John      |http:::1                  |omnisci|GPU
491-xpfb        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |Patrick   |http:::1                  |omnisci|GPU
451-gp2c        |PENDING_QUEUE       |0          |2021-08-03 ...|SELECT ...      |John      |http:::1                  |omnisci|GPU
190-5pax        |PENDING_EXECUTOR    |1          |2021-08-03 ...|SELECT ...      |Cavin     |http:::1                  |omnisci|GPU
720-nQtV        |RUNNING_QUERY_KERNEL|2          |2021-08-03 ...|SELECT ...      |Cavin     |tcp:::ffff:127.0.0.1:50142|omnisci|GPU

  • KILL QUERY is only available if the runtime query interrupt parameter (enable-runtime-query-interrupt) is set.

  • Interrupting a query in ‘PENDING_QUEUE’ status is supported in both distributed and single-server mode.

  • To enable query interrupt for tables imported from data files in local storage, set enable_non_kernel_time_query_interrupt to TRUE. (It is enabled by default.)

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