1d9b3aeee7
The error format '##keyword' in a lot of docs. This pr is to repair document format. #4335
78 lines
2.7 KiB
Markdown
78 lines
2.7 KiB
Markdown
---
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{
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"title": "SHOW FUNCTIONS",
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"language": "en"
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}
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---
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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# SHOW FUNCTIONS
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## Description
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### Syntax
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```
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SHOW [FULL] [BUILTIN] FUNCTIONS [IN|FROM db] [LIKE 'function_pattern']
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```
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### Parameters
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>`full`: Indicate to show the details of function
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>`builtin`: Indicate to show the functions that doris provides
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>`db`: The name of the database to query
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>`function_pattern`: The parameter to filter function name
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Look at all the custom(builtin) functions under the database. If the user specifies the database, then look at the corresponding database, otherwise directly query the database where the current session is located.
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You need `SHOW'privileges for this database
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## example
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```
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mysql> show full functions in testDb\G
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*************************** 1. row ***************************
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Signature: my_add(INT,INT)
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Return Type: INT
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Function Type: Scalar
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Intermediate Type: NULL
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Properties: {"symbol":"_ZN9doris_udf6AddUdfEPNS_15FunctionContextERKNS_6IntValES4_","object_file":"http://host:port/libudfsample.so","md5":"cfe7a362d10f3aaf6c49974ee0f1f878"}
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*************************** 2. row ***************************
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Signature: my_count(BIGINT)
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Return Type: BIGINT
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Function Type: Aggregate
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Intermediate Type: NULL
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Properties: {"object_file":"http://host:port/libudasample.so","finalize_fn":"_ZN9doris_udf13CountFinalizeEPNS_15FunctionContextERKNS_9BigIntValE","init_fn":"_ZN9doris_udf9CountInitEPNS_15FunctionContextEPNS_9BigIntValE","merge_fn":"_ZN9doris_udf10CountMergeEPNS_15FunctionContextERKNS_9BigIntValEPS2_","md5":"37d185f80f95569e2676da3d5b5b9d2f","update_fn":"_ZN9doris_udf11CountUpdateEPNS_15FunctionContextERKNS_6IntValEPNS_9BigIntValE"}
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2 rows in set (0.00 sec)
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mysql> show builtin functions in testDb like 'year%';
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+---------------+
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| Function Name |
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+---------------+
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| year |
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| years_add |
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| years_diff |
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| years_sub |
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+---------------+
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2 rows in set (0.00 sec)
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```
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## keyword
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SHOW,FUNCTIONS
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