原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/sql-syntax-show-functions.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
SHOW FUNCTIONSedit
Synopsis:
Description: List all the SQL functions and their type. The LIKE clause can be used to restrict the list of names to the given pattern.
SHOW FUNCTIONS;
name | type
-----------------+---------------
AVG |AGGREGATE
COUNT |AGGREGATE
FIRST |AGGREGATE
FIRST_VALUE |AGGREGATE
LAST |AGGREGATE
LAST_VALUE |AGGREGATE
MAX |AGGREGATE
MIN |AGGREGATE
SUM |AGGREGATE
KURTOSIS |AGGREGATE
MAD |AGGREGATE
PERCENTILE |AGGREGATE
PERCENTILE_RANK |AGGREGATE
SKEWNESS |AGGREGATE
STDDEV_POP |AGGREGATE
SUM_OF_SQUARES |AGGREGATE
VAR_POP |AGGREGATE
HISTOGRAM |GROUPING
CASE |CONDITIONAL
COALESCE |CONDITIONAL
GREATEST |CONDITIONAL
IFNULL |CONDITIONAL
IIF |CONDITIONAL
ISNULL |CONDITIONAL
LEAST |CONDITIONAL
NULLIF |CONDITIONAL
NVL |CONDITIONAL
CURDATE |SCALAR
CURRENT_DATE |SCALAR
CURRENT_TIME |SCALAR
CURRENT_TIMESTAMP|SCALAR
CURTIME |SCALAR
DATEADD |SCALAR
DATEDIFF |SCALAR
DATEPART |SCALAR
DATETRUNC |SCALAR
DATE_ADD |SCALAR
DATE_DIFF |SCALAR
DATE_PART |SCALAR
DATE_TRUNC |SCALAR
DAY |SCALAR
DAYNAME |SCALAR
DAYOFMONTH |SCALAR
DAYOFWEEK |SCALAR
DAYOFYEAR |SCALAR
DAY_NAME |SCALAR
DAY_OF_MONTH |SCALAR
DAY_OF_WEEK |SCALAR
DAY_OF_YEAR |SCALAR
DOM |SCALAR
DOW |SCALAR
DOY |SCALAR
HOUR |SCALAR
HOUR_OF_DAY |SCALAR
IDOW |SCALAR
ISODAYOFWEEK |SCALAR
ISODOW |SCALAR
ISOWEEK |SCALAR
ISOWEEKOFYEAR |SCALAR
ISO_DAY_OF_WEEK |SCALAR
ISO_WEEK_OF_YEAR |SCALAR
IW |SCALAR
IWOY |SCALAR
MINUTE |SCALAR
MINUTE_OF_DAY |SCALAR
MINUTE_OF_HOUR |SCALAR
MONTH |SCALAR
MONTHNAME |SCALAR
MONTH_NAME |SCALAR
MONTH_OF_YEAR |SCALAR
NOW |SCALAR
QUARTER |SCALAR
SECOND |SCALAR
SECOND_OF_MINUTE |SCALAR
TIMESTAMPADD |SCALAR
TIMESTAMPDIFF |SCALAR
TIMESTAMP_ADD |SCALAR
TIMESTAMP_DIFF |SCALAR
TODAY |SCALAR
WEEK |SCALAR
WEEK_OF_YEAR |SCALAR
YEAR |SCALAR
ABS |SCALAR
ACOS |SCALAR
ASIN |SCALAR
ATAN |SCALAR
ATAN2 |SCALAR
CBRT |SCALAR
CEIL |SCALAR
CEILING |SCALAR
COS |SCALAR
COSH |SCALAR
COT |SCALAR
DEGREES |SCALAR
E |SCALAR
EXP |SCALAR
EXPM1 |SCALAR
FLOOR |SCALAR
LOG |SCALAR
LOG10 |SCALAR
MOD |SCALAR
PI |SCALAR
POWER |SCALAR
RADIANS |SCALAR
RAND |SCALAR
RANDOM |SCALAR
ROUND |SCALAR
SIGN |SCALAR
SIGNUM |SCALAR
SIN |SCALAR
SINH |SCALAR
SQRT |SCALAR
TAN |SCALAR
TRUNC |SCALAR
TRUNCATE |SCALAR
ASCII |SCALAR
BIT_LENGTH |SCALAR
CHAR |SCALAR
CHARACTER_LENGTH |SCALAR
CHAR_LENGTH |SCALAR
CONCAT |SCALAR
INSERT |SCALAR
LCASE |SCALAR
LEFT |SCALAR
LENGTH |SCALAR
LOCATE |SCALAR
LTRIM |SCALAR
OCTET_LENGTH |SCALAR
POSITION |SCALAR
REPEAT |SCALAR
REPLACE |SCALAR
RIGHT |SCALAR
RTRIM |SCALAR
SPACE |SCALAR
SUBSTRING |SCALAR
UCASE |SCALAR
CAST |SCALAR
CONVERT |SCALAR
DATABASE |SCALAR
USER |SCALAR
ST_ASTEXT |SCALAR
ST_ASWKT |SCALAR
ST_DISTANCE |SCALAR
ST_GEOMETRYTYPE |SCALAR
ST_GEOMFROMTEXT |SCALAR
ST_WKTTOSQL |SCALAR
ST_X |SCALAR
ST_Y |SCALAR
ST_Z |SCALAR
SCORE |SCORE
The list of functions returned can be customized based on the pattern.
It can be an exact match:
SHOW FUNCTIONS LIKE 'ABS';
name | type
---------------+---------------
ABS |SCALAR
A wildcard for exactly one character:
SHOW FUNCTIONS LIKE 'A__';
name | type
---------------+---------------
AVG |AGGREGATE
ABS |SCALAR
A wildcard matching zero or more characters:
SHOW FUNCTIONS LIKE 'A%';
name | type
---------------+---------------
AVG |AGGREGATE
ABS |SCALAR
ACOS |SCALAR
ASIN |SCALAR
ATAN |SCALAR
ATAN2 |SCALAR
ASCII |SCALAR
Or of course, a variation of the above:
SHOW FUNCTIONS LIKE '%DAY%';
name | type
---------------+---------------
DAY |SCALAR
DAYNAME |SCALAR
DAYOFMONTH |SCALAR
DAYOFWEEK |SCALAR
DAYOFYEAR |SCALAR
DAY_NAME |SCALAR
DAY_OF_MONTH |SCALAR
DAY_OF_WEEK |SCALAR
DAY_OF_YEAR |SCALAR
HOUR_OF_DAY |SCALAR
ISODAYOFWEEK |SCALAR
ISO_DAY_OF_WEEK|SCALAR
MINUTE_OF_DAY |SCALAR
TODAY |SCALAR