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layout: global title: SHOW COLLATIONS displayTitle: SHOW COLLATIONS license: | Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Description

Returns the list of collations supported by Spark. An optional pattern may be used to filter the results. The LIKE clause is optional.

Syntax

SHOW COLLATIONS [ LIKE regex_pattern ]

Parameters

• regex_pattern

  Specifies the regular expression pattern that is used to filter the results of the statement.

  • Except for * and | character, the pattern works like a regular expression.
  • * alone matches 0 or more characters and | is used to separate multiple different regular expressions, any of which can match.
  • The leading and trailing blanks are trimmed in the input pattern before processing. The pattern match is case-insensitive.

Output

The output has the following columns:

Column	Type	Nullable	Description
NAME	STRING	No	The name of the collation.
LANGUAGE	STRING	Yes	The display language of the locale, or null for locale-independent collations.
COUNTRY	STRING	Yes	The display country of the locale, or null for locale-independent collations.
ACCENT_SENSITIVITY	STRING	No	Whether the collation is accent-sensitive (ACCENT_SENSITIVE) or accent-insensitive (ACCENT_INSENSITIVE).
CASE_SENSITIVITY	STRING	No	Whether the collation is case-sensitive (CASE_SENSITIVE) or case-insensitive (CASE_INSENSITIVE).
PAD_ATTRIBUTE	STRING	No	The pad attribute of the collation: NO_PAD or RTRIM.
ICU_VERSION	STRING	Yes	The ICU library version used for the collation, or null for non-ICU collations such as UTF8_BINARY and UTF8_LCASE.

Examples

-- List all supported collations (results truncated)
SHOW COLLATIONS;
+-----------------+--------+-------+------------------+----------------+-------------+-----------+
|             NAME|LANGUAGE|COUNTRY|ACCENT_SENSITIVITY|CASE_SENSITIVITY|PAD_ATTRIBUTE|ICU_VERSION|
+-----------------+--------+-------+------------------+----------------+-------------+-----------+
|      UTF8_BINARY|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       null|
|       UTF8_LCASE|    null|   null|  ACCENT_SENSITIVE|CASE_INSENSITIVE|       NO_PAD|       null|
|          UNICODE|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       78.2|
|       UNICODE_CI|    null|   null|  ACCENT_SENSITIVE|CASE_INSENSITIVE|       NO_PAD|       78.2|
|           en_USA|  English| United States|ACCENT_SENSITIVE|CASE_SENSITIVE|  NO_PAD|       78.2|
|        en_USA_CI|  English| United States|ACCENT_SENSITIVE|CASE_INSENSITIVE| NO_PAD|       78.2|
|              ...|     ...|    ...|               ...|             ...|         ...|        ...|
+-----------------+--------+-------+------------------+----------------+-------------+-----------+

-- List all collations matching `UTF8_BINARY*`
SHOW COLLATIONS LIKE 'UTF8_BINARY*';
+-----------------+--------+-------+------------------+----------------+-------------+-----------+
|             NAME|LANGUAGE|COUNTRY|ACCENT_SENSITIVITY|CASE_SENSITIVITY|PAD_ATTRIBUTE|ICU_VERSION|
+-----------------+--------+-------+------------------+----------------+-------------+-----------+
|      UTF8_BINARY|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       null|
| UTF8_BINARY_RTRIM|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|        RTRIM|       null|
+-----------------+--------+-------+------------------+----------------+-------------+-----------+

-- List all collations matching `UNICODE*`
SHOW COLLATIONS LIKE 'UNICODE*';
+--------------+--------+-------+-------------------+----------------+-------------+-----------+
|          NAME|LANGUAGE|COUNTRY| ACCENT_SENSITIVITY|CASE_SENSITIVITY|PAD_ATTRIBUTE|ICU_VERSION|
+--------------+--------+-------+-------------------+----------------+-------------+-----------+
|       UNICODE|    null|   null|   ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       78.2|
|    UNICODE_AI|    null|   null| ACCENT_INSENSITIVE|  CASE_SENSITIVE|       NO_PAD|       78.2|
| UNICODE_AI_RTRIM|    null|   null|ACCENT_INSENSITIVE|CASE_SENSITIVE|        RTRIM|       78.2|
|    UNICODE_CI|    null|   null|   ACCENT_SENSITIVE|CASE_INSENSITIVE|       NO_PAD|       78.2|
| UNICODE_CI_AI|    null|   null| ACCENT_INSENSITIVE|CASE_INSENSITIVE|       NO_PAD|       78.2|
|UNICODE_CI_AI_RTRIM|    null|   null|ACCENT_INSENSITIVE|CASE_INSENSITIVE|      RTRIM|       78.2|
| UNICODE_CI_RTRIM|    null|   null|  ACCENT_SENSITIVE|CASE_INSENSITIVE|       RTRIM|       78.2|
|  UNICODE_RTRIM|    null|   null|   ACCENT_SENSITIVE|  CASE_SENSITIVE|        RTRIM|       78.2|
+--------------+--------+-------+-------------------+----------------+-------------+-----------+

-- List all collations matching `UNICODE` or `UTF8_BINARY`
SHOW COLLATIONS LIKE 'UNICODE|UTF8_BINARY';
+-----------+--------+-------+------------------+----------------+-------------+-----------+
|       NAME|LANGUAGE|COUNTRY|ACCENT_SENSITIVITY|CASE_SENSITIVITY|PAD_ATTRIBUTE|ICU_VERSION|
+-----------+--------+-------+------------------+----------------+-------------+-----------+
|UTF8_BINARY|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       null|
|    UNICODE|    null|   null|  ACCENT_SENSITIVE|  CASE_SENSITIVE|       NO_PAD|       78.2|
+-----------+--------+-------+------------------+----------------+-------------+-----------+

Related Statements

• STRING TYPE