From 90a0ab5519f112277221c6bfa5dc4df7b0c31bda Mon Sep 17 00:00:00 2001
From: bb7133 <bb7133@gmail.com>
Date: Mon, 25 May 2020 17:28:32 +0800
Subject: [PATCH] add & update several sql statements (#3296)

---
 TOC.md                                        |   1 +
 media/sqlgram/ShowBuiltinsStmt.png            | Bin 0 -> 3116 bytes
 media/sqlgram/ShowEnginesStmt.png             | Bin 0 -> 3128 bytes
 media/sqlgram/ShowErrorsStmt.png              | Bin 0 -> 3318 bytes
 sql-statements/sql-statement-show-builtins.md | 303 ++++++++++++++++++
 sql-statements/sql-statement-show-engines.md  |   6 +-
 sql-statements/sql-statement-show-errors.md   |   8 +-
 7 files changed, 311 insertions(+), 7 deletions(-)
 create mode 100644 media/sqlgram/ShowBuiltinsStmt.png
 create mode 100644 media/sqlgram/ShowEnginesStmt.png
 create mode 100644 media/sqlgram/ShowErrorsStmt.png
 create mode 100644 sql-statements/sql-statement-show-builtins.md

diff --git a/TOC.md b/TOC.md
index f99c3038f825..01bb13b2ead2 100644
--- a/TOC.md
+++ b/TOC.md
@@ -293,6 +293,7 @@
       - [`SET PASSWORD`](/sql-statements/sql-statement-set-password.md)
       - [`SET TRANSACTION`](/sql-statements/sql-statement-set-transaction.md)
       - [`SET [GLOBAL|SESSION] <variable>`](/sql-statements/sql-statement-set-variable.md)
+      - [`SHOW BUILTINS`](/sql-statements/sql-statement-show-builtins.md)
       - [`SHOW CHARACTER SET`](/sql-statements/sql-statement-show-character-set.md)
       - [`SHOW COLLATION`](/sql-statements/sql-statement-show-collation.md)
       - [`SHOW [FULL] COLUMNS FROM`](/sql-statements/sql-statement-show-columns-from.md)
diff --git a/media/sqlgram/ShowBuiltinsStmt.png b/media/sqlgram/ShowBuiltinsStmt.png
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diff --git a/sql-statements/sql-statement-show-builtins.md b/sql-statements/sql-statement-show-builtins.md
new file mode 100644
index 000000000000..c54f1b9dd982
--- /dev/null
+++ b/sql-statements/sql-statement-show-builtins.md
@@ -0,0 +1,303 @@
+---
+title: SHOW BUILTINS
+summary: TiDB 数据库中 SHOW BUILTINS 的使用概况。
+category: reference
+---
+
+# SHOW BUILTINS
+
+`SHOW BUILTINS` 语句用于列出 TiDB 中所有的内置函数。
+
+## 语法图
+
+**ShowBuiltinsStmt:**
+
+![ShowBuiltinsStmt](/media/sqlgram/ShowBuiltinsStmt.png)
+
+## 示例
+
+{{< copyable "sql" >}}
+
+```sql
+SHOW BUILTINS;
+```
+
+```
++-----------------------------+
+| Supported_builtin_functions |
++-----------------------------+
+| abs                         |
+| acos                        |
+| adddate                     |
+| addtime                     |
+| aes_decrypt                 |
+| aes_encrypt                 |
+| and                         |
+| any_value                   |
+| ascii                       |
+| asin                        |
+| atan                        |
+| atan2                       |
+| benchmark                   |
+| bin                         |
+| bit_count                   |
+| bit_length                  |
+| bitand                      |
+| bitneg                      |
+| bitor                       |
+| bitxor                      |
+| case                        |
+| ceil                        |
+| ceiling                     |
+| char_func                   |
+| char_length                 |
+| character_length            |
+| charset                     |
+| coalesce                    |
+| coercibility                |
+| collation                   |
+| compress                    |
+| concat                      |
+| concat_ws                   |
+| connection_id               |
+| conv                        |
+| convert                     |
+| convert_tz                  |
+| cos                         |
+| cot                         |
+| crc32                       |
+| curdate                     |
+| current_date                |
+| current_role                |
+| current_time                |
+| current_timestamp           |
+| current_user                |
+| curtime                     |
+| database                    |
+| date                        |
+| date_add                    |
+| date_format                 |
+| date_sub                    |
+| datediff                    |
+| day                         |
+| dayname                     |
+| dayofmonth                  |
+| dayofweek                   |
+| dayofyear                   |
+| decode                      |
+| default_func                |
+| degrees                     |
+| des_decrypt                 |
+| des_encrypt                 |
+| div                         |
+| elt                         |
+| encode                      |
+| encrypt                     |
+| eq                          |
+| exp                         |
+| export_set                  |
+| extract                     |
+| field                       |
+| find_in_set                 |
+| floor                       |
+| format                      |
+| format_bytes                |
+| format_nano_time            |
+| found_rows                  |
+| from_base64                 |
+| from_days                   |
+| from_unixtime               |
+| ge                          |
+| get_format                  |
+| get_lock                    |
+| getparam                    |
+| getvar                      |
+| greatest                    |
+| gt                          |
+| hex                         |
+| hour                        |
+| if                          |
+| ifnull                      |
+| in                          |
+| inet6_aton                  |
+| inet6_ntoa                  |
+| inet_aton                   |
+| inet_ntoa                   |
+| insert_func                 |
+| instr                       |
+| intdiv                      |
+| interval                    |
+| is_free_lock                |
+| is_ipv4                     |
+| is_ipv4_compat              |
+| is_ipv4_mapped              |
+| is_ipv6                     |
+| is_used_lock                |
+| isfalse                     |
+| isnull                      |
+| istrue                      |
+| json_array                  |
+| json_array_append           |
+| json_array_insert           |
+| json_contains               |
+| json_contains_path          |
+| json_depth                  |
+| json_extract                |
+| json_insert                 |
+| json_keys                   |
+| json_length                 |
+| json_merge                  |
+| json_merge_patch            |
+| json_merge_preserve         |
+| json_object                 |
+| json_pretty                 |
+| json_quote                  |
+| json_remove                 |
+| json_replace                |
+| json_search                 |
+| json_set                    |
+| json_storage_size           |
+| json_type                   |
+| json_unquote                |
+| json_valid                  |
+| last_day                    |
+| last_insert_id              |
+| lastval                     |
+| lcase                       |
+| le                          |
+| least                       |
+| left                        |
+| leftshift                   |
+| length                      |
+| like                        |
+| ln                          |
+| load_file                   |
+| localtime                   |
+| localtimestamp              |
+| locate                      |
+| log                         |
+| log10                       |
+| log2                        |
+| lower                       |
+| lpad                        |
+| lt                          |
+| ltrim                       |
+| make_set                    |
+| makedate                    |
+| maketime                    |
+| master_pos_wait             |
+| md5                         |
+| microsecond                 |
+| mid                         |
+| minus                       |
+| minute                      |
+| mod                         |
+| month                       |
+| monthname                   |
+| mul                         |
+| name_const                  |
+| ne                          |
+| nextval                     |
+| not                         |
+| now                         |
+| nulleq                      |
+| oct                         |
+| octet_length                |
+| old_password                |
+| or                          |
+| ord                         |
+| password_func               |
+| period_add                  |
+| period_diff                 |
+| pi                          |
+| plus                        |
+| position                    |
+| pow                         |
+| power                       |
+| quarter                     |
+| quote                       |
+| radians                     |
+| rand                        |
+| random_bytes                |
+| regexp                      |
+| release_all_locks           |
+| release_lock                |
+| repeat                      |
+| replace                     |
+| reverse                     |
+| right                       |
+| rightshift                  |
+| round                       |
+| row_count                   |
+| rpad                        |
+| rtrim                       |
+| schema                      |
+| sec_to_time                 |
+| second                      |
+| session_user                |
+| setval                      |
+| setvar                      |
+| sha                         |
+| sha1                        |
+| sha2                        |
+| sign                        |
+| sin                         |
+| sleep                       |
+| space                       |
+| sqrt                        |
+| str_to_date                 |
+| strcmp                      |
+| subdate                     |
+| substr                      |
+| substring                   |
+| substring_index             |
+| subtime                     |
+| sysdate                     |
+| system_user                 |
+| tan                         |
+| tidb_decode_key             |
+| tidb_decode_plan            |
+| tidb_is_ddl_owner           |
+| tidb_parse_tso              |
+| tidb_version                |
+| time                        |
+| time_format                 |
+| time_to_sec                 |
+| timediff                    |
+| timestamp                   |
+| timestampadd                |
+| timestampdiff               |
+| to_base64                   |
+| to_days                     |
+| to_seconds                  |
+| trim                        |
+| truncate                    |
+| ucase                       |
+| unaryminus                  |
+| uncompress                  |
+| uncompressed_length         |
+| unhex                       |
+| unix_timestamp              |
+| upper                       |
+| user                        |
+| utc_date                    |
+| utc_time                    |
+| utc_timestamp               |
+| uuid                        |
+| uuid_short                  |
+| validate_password_strength  |
+| version                     |
+| week                        |
+| weekday                     |
+| weekofyear                  |
+| weight_string               |
+| xor                         |
+| year                        |
+| yearweek                    |
++-----------------------------+
+268 rows in set (0.00 sec)
+```
+
+## MySQL 兼容性
+
+`SHOW BUILTINS` 是 TiDB 新增语法，MySQL 中无此语法。
diff --git a/sql-statements/sql-statement-show-engines.md b/sql-statements/sql-statement-show-engines.md
index 20f3fa049064..b2d3eaee9c85 100644
--- a/sql-statements/sql-statement-show-engines.md
+++ b/sql-statements/sql-statement-show-engines.md
@@ -7,10 +7,14 @@ aliases: ['/docs-cn/dev/reference/sql/statements/show-engines/']
 
 # SHOW ENGINES
 
-`SHOW ENGINES` 语句仅提供 MySQL 兼容性。
+`SHOW ENGINES` 语句用于列出所有支持的存储引擎，该语法仅提供 MySQL 兼容性。
 
 ## 语法图
 
+**ShowEnginesStmt:**
+
+![ShowEnginesStmt](/media/sqlgram/ShowEnginesStmt.png)
+
 ```sql
 SHOW ENGINES;
 ```
diff --git a/sql-statements/sql-statement-show-errors.md b/sql-statements/sql-statement-show-errors.md
index 501a7bad3987..b85e9025460c 100644
--- a/sql-statements/sql-statement-show-errors.md
+++ b/sql-statements/sql-statement-show-errors.md
@@ -13,13 +13,9 @@ aliases: ['/docs-cn/dev/reference/sql/statements/show-errors/']
 
 ## 语法图
 
-**ShowStmt:**
+**ShowErrorsStmt:**
 
-![ShowStmt](/media/sqlgram/ShowStmt.png)
-
-**ShowTargetFilterable:**
-
-![ShowTargetFilterable](/media/sqlgram/ShowTargetFilterable.png)
+![ShowErrorsStmt](/media/sqlgram/ShowErrorsStmt.png)
 
 ## 示例