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Warning:
As of October 4, 2019, CockroachDB v2.0 is no longer supported. For more details, refer to the Release Support Policy.
The SHOW statement can display the value of either one or all of
the session setting variables. Some of these can also be configured via SET.
Required Privileges
No privileges are required to display the session settings.
Synopsis
Note:
The SHOW statement for session settings is unrelated to the other SHOW statements: SHOW CLUSTER SETTING, SHOW CREATE TABLE, SHOW CREATE VIEW, SHOW USERS, SHOW DATABASES, SHOW COLUMNS, SHOW GRANTS, and SHOW CONSTRAINTS.Parameters
The SHOW <session variable> statement accepts a single parameter: the variable name.
The variable name is case insensitive. It may be enclosed in double quotes; this is useful if the variable name itself contains spaces.
Supported variables
| Variable name | Description | Initial value | Can be modified with SET? |
|---|---|---|---|
application_name |
The current application name for statistics collection. | Empty string, or cockroach for sessions from the built-in SQL client |
Yes |
database |
The current database. | Database in connection string, or empty if not specified | Yes |
default_transaction_isolation |
The default transaction isolation level for the current session. See Transaction parameters for more details. | Settings in connection string, or SERIALIZABLE if not specified |
Yes |
default_transaction_read_only |
New in v2.0: The default transaction access mode for the current session. If set to on, only read operations are allowed in transactions in the current session; if set to off, both read and write operations are allowed. See SET TRANSACTION for more details. |
off |
Yes |
distsql |
auto |
||
node_id |
New in v1.1: The ID of the node currently connected to. This variable is particularly useful for verifying load balanced connections. |
Node-dependent | No |
search_path |
Changed in v2.0: A list of schemas that will be searched to resolve unqualified table or function names. For more details, see Name Resolution. | {public} |
Yes |
server_version |
The version of PostgreSQL that CockroachDB emulates. | Version-dependent | No |
server_version_num |
New in v2.0: The version of PostgreSQL that CockroachDB emulates. | Version-dependent | Yes |
session_user |
The user connected for the current session. | User in connection string | No |
sql_safe_updates |
If false, potentially unsafe SQL statements are allowed, including DROP of a non-empty database and all dependent objects, DELETE without a WHERE clause, UPDATE without a WHERE clause, and ALTER TABLE .. DROP COLUMN. See Allow Potentially Unsafe SQL Statements for more details. |
true for interactive sessions from the built-in SQL client,false for sessions from other clients |
Yes |
timezone |
The default time zone for the current session. Changed in v2.0: This session variable was named "time zone" (with a space) in CockroachDB 1.x. It has been renamed for compatibility with PostgreSQL. |
UTC |
Yes |
tracing |
off |
||
transaction_isolation |
The isolation level of the current transaction. See Transaction parameters for more details. Changed in v2.0: This session variable was called transaction isolation level (with spaces) in CockroachDB 1.x. It has been renamed for compatibility with PostgreSQL. |
SERIALIZABLE |
Yes |
transaction_priority |
The priority of the current transaction. See Transaction parameters for more details. Changed in v2.0: This session variable was called transaction priority (with a space) in CockroachDB 1.x. It has been renamed for compatibility with PostgreSQL. |
NORMAL |
Yes |
transaction_read_only |
New in v2.0: The access mode of the current transaction. See Set Transaction for more details. | off |
Yes |
transaction_status |
The state of the current transaction. See Transactions for more details. Changed in v2.0: This session variable was called transaction status (with a space) in CockroachDB 1.x. It has been renamed for compatibility with PostgreSQL. |
NoTxn |
No |
client_encoding |
(Reserved; exposed only for ORM compatibility.) | UTF8 |
No |
client_min_messages |
(Reserved; exposed only for ORM compatibility.) | (Reserved) | No |
datestyle |
(Reserved; exposed only for ORM compatibility.) | ISO |
No |
extra_float_digits |
(Reserved; exposed only for ORM compatibility.) | (Reserved) | No |
intervalstyle |
New in v2.0: (Reserved; exposed only for ORM compatibility.) | postgres |
No |
max_index_keys |
(Reserved; exposed only for ORM compatibility.) | (Reserved) | No |
standard_conforming_strings |
(Reserved; exposed only for ORM compatibility.) | (Reserved) | No |
Special syntax cases supported for compatibility:
| Syntax | Equivalent to |
|---|---|
SHOW TRANSACTION PRIORITY |
SHOW "transaction priority" |
SHOW TRANSACTION ISOLATION LEVEL |
SHOW "transaction isolation level" |
SHOW TIME ZONE |
SHOW "timezone" |
SHOW TRANSACTION STATUS |
SHOW "transaction status" |
Examples
Showing the Value of a Single Session Variable
> SHOW DATABASE;
+----------+
| database |
+----------+
| test |
+----------+
(1 row)
Showing the Value of all Session Variables
> SHOW ALL;
+-------------------------------+--------------+
| Variable | Value |
+-------------------------------+--------------+
| application_name | |
| client_encoding | UTF8 |
| client_min_messages | |
| database | |
| default_transaction_isolation | SERIALIZABLE |
| distsql | off |
| extra_float_digits | |
| max_index_keys | 32 |
| node_id | 1 |
| search_path | pg_catalog |
| server_version | 9.5.0 |
| session_user | root |
| standard_conforming_strings | on |
| timezone | UTC |
| transaction isolation level | SERIALIZABLE |
| transaction priority | NORMAL |
| transaction status | NoTxn |
+-------------------------------+--------------+
(16 rows)
See Also
SET(session variable)- Transactions and Transaction parameters
SHOW CLUSTER SETTINGSHOW COLUMNSSHOW CONSTRAINTSSHOW CREATE TABLESHOW CREATE VIEWSHOW DATABASESSHOW GRANTSSHOW INDEXSHOW USERS
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