support more function pushdown (pingcap#19815)

Author: windtalker

functions-and-operators/expressions-pushed-down.md

@@ -24,7 +24,7 @@ TiFlash 也支持[本页](/tiflash/tiflash-supported-pushdown-calculations.md)
 | [数值运算](/functions-and-operators/numeric-functions-and-operators.md) | [+](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_plus) <br/>[-](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_minus) <br/>[*](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_times) <br/>[/](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_divide) <br/>[DIV](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_div) <br/>[% (MOD)](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_mod) <br/>[-](https://dev.mysql.com/doc/refman/8.0/en/arithmetic-functions.html#operator_unary-minus) <br/>[ABS()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_abs) <br/>[ACOS()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_acos) <br/>[ASIN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_asin) <br/>[ATAN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_atan) <br/>[ATAN2(), ATAN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_atan2) <br/>[CEIL()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_ceil) <br/>[CEILING()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_ceiling) <br/>[CONV()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_conv) <br/>[COS()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_cos) <br/>[COT()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_cot) <br/>[CRC32()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_crc32) <br/>[DEGREES()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_degrees) <br/>[EXP()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_exp) <br/>[FLOOR()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_floor) <br/>[LN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_ln) <br/>[LOG()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_log) <br/>[LOG10()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_log10) <br/>[LOG2()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_log2) <br/>[MOD()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_mod) <br/>[PI()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_pi) <br/>[POW()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_pow) <br/>[POWER()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_power) <br/>[RADIANS()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_radians) <br/>[RAND()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_rand) <br/>[ROUND()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_round) <br/>[SIGN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_sign) <br/>[SIN()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_sin) <br/>[SQRT()](https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_sqrt) |
 | [控制流运算](/functions-and-operators/control-flow-functions.md) | [CASE](https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html#operator_case) <br/>[IF()](https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html#function_if) <br/>[IFNULL()](https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html#function_ifnull) |
 | [JSON 运算](/functions-and-operators/json-functions.md) | [JSON_ARRAY_APPEND()](/functions-and-operators/json-functions/json-functions-modify.md#json_array_append) <br/>[JSON_ARRAY()](/functions-and-operators/json-functions/json-functions-create.md#json_array) <br/>[JSON_CONTAINS()](/functions-and-operators/json-functions/json-functions-search.md#json_contains) <br/>[JSON_EXTRACT()](/functions-and-operators/json-functions/json-functions-search.md#json_extract) <br/>[JSON_INSERT()](/functions-and-operators/json-functions/json-functions-modify.md#json_insert) <br/>[JSON_LENGTH()](/functions-and-operators/json-functions/json-functions-return.md#json_length) <br/>[JSON_MERGE_PATCH()](/functions-and-operators/json-functions/json-functions-modify.md#json_merge_patch) <br/>[JSON_MERGE()](/functions-and-operators/json-functions/json-functions-modify.md#json_merge) <br/>[JSON_OBJECT()](/functions-and-operators/json-functions/json-functions-create.md#json_object) <br/>[JSON_REMOVE()](/functions-and-operators/json-functions/json-functions-modify.md#json_remove) <br/>[JSON_REPLACE()](/functions-and-operators/json-functions/json-functions-modify.md#json_replace) <br/>[JSON_SET()](/functions-and-operators/json-functions/json-functions-modify.md#json_set) <br/>[JSON_TYPE()](/functions-and-operators/json-functions/json-functions-return.md#json_type) <br/>[JSON_UNQUOTE()](/functions-and-operators/json-functions/json-functions-modify.md#json_unquote) <br/>[JSON_VALID()](/functions-and-operators/json-functions/json-functions-return.md#json_valid) <br/>[MEMBER OF()](/functions-and-operators/json-functions/json-functions-search.md#member-of) |
-| [日期运算](/functions-and-operators/date-and-time-functions.md) | [DATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date) <br/>[DATE_FORMAT()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-format) <br/>[DATEDIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_datediff) <br/>[DAYOFMONTH()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofmonth) <br/>[DAYOFWEEK()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofweek) <br/>[DAYOFYEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofyear) <br/>[FROM_DAYS()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_from-days) <br/>[HOUR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_hour) <br/>[MAKEDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_makedate) <br/>[MAKETIME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_maketime) <br/>[MICROSECOND()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_microsecond) <br/>[MINUTE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_minute) <br/>[MONTH()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_month) <br/>[MONTHNAME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_monthname) <br/>[PERIOD_ADD()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_period-add) <br/>[PERIOD_DIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_period-diff) <br/>[SEC_TO_TIME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_sec-to-time) <br/>[SECOND()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_second) <br/>[SYSDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_sysdate) <br/>[TIME_TO_SEC()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_time-to-sec) <br/>[TIMEDIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_timediff) <br/>[WEEK()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_week) <br/>[WEEKOFYEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_weekofyear) <br/>[YEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_year) <br/>[DATE_ADD()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-add) <br/>[DATE_SUB()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-sub) <br/>[ADDDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_adddate) <br/>[SUBDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_subdate) |
+| [日期运算](/functions-and-operators/date-and-time-functions.md) | [DATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date) <br/>[DATE_FORMAT()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-format) <br/>[DATEDIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_datediff) <br/>[DAYOFMONTH()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofmonth) <br/>[DAYOFWEEK()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofweek) <br/>[DAYOFYEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_dayofyear) <br/>[FROM_DAYS()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_from-days) <br/>[HOUR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_hour) <br/>[MAKEDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_makedate) <br/>[MAKETIME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_maketime) <br/>[MICROSECOND()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_microsecond) <br/>[MINUTE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_minute) <br/>[MONTH()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_month) <br/>[MONTHNAME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_monthname) <br/>[PERIOD_ADD()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_period-add) <br/>[PERIOD_DIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_period-diff) <br/>[SEC_TO_TIME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_sec-to-time) <br/>[SECOND()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_second) <br/>[SYSDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_sysdate) <br/>[TIME_TO_SEC()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_time-to-sec) <br/>[TIMEDIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_timediff) <br/>[WEEK()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_week) <br/>[WEEKOFYEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_weekofyear) <br/>[YEAR()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_year) <br/>[DATE_ADD()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-add) <br/>[DATE_SUB()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-sub) <br/>[ADDDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_adddate) <br/>[SUBDATE()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_subdate) <br/>[FROM_UNIXTIME()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_from-unixtime) <br/>[TIMESTAMPDIFF()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_timestampdiff) <br/>[UNIX_TIMESTAMP()](https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_unix-timestamp) |
 | [字符串函数](/functions-and-operators/string-functions.md) | [ASCII()](/functions-and-operators/string-functions.md#ascii) <br/>[BIT_LENGTH()](/functions-and-operators/string-functions.md#bit_length) <br/>[CHAR()](/functions-and-operators/string-functions.md#char) <br/>[CHAR_LENGTH()](/functions-and-operators/string-functions.md#char_length) <br/>[CONCAT()](/functions-and-operators/string-functions.md#concat) <br/>[CONCAT_WS()](/functions-and-operators/string-functions.md#concat_ws) <br/>[ELT()](/functions-and-operators/string-functions.md#elt) <br/>[FIELD()](/functions-and-operators/string-functions.md#field) <br/>[HEX()](/functions-and-operators/string-functions.md#hex) <br/>[LENGTH()](/functions-and-operators/string-functions.md#length) <br/>[LIKE](/functions-and-operators/string-functions.md#like) <br/>[LOWER()](/functions-and-operators/string-functions.md#lower) <br/>[LTRIM()](/functions-and-operators/string-functions.md#ltrim) <br/>[MID()](/functions-and-operators/string-functions.md#mid) <br/>[NOT LIKE](/functions-and-operators/string-functions.md#not-like) <br/>[NOT REGEXP](/functions-and-operators/string-functions.md#not-regexp) <br/>[REGEXP](/functions-and-operators/string-functions.md#regexp) <br/>[REGEXP_LIKE()](/functions-and-operators/string-functions.md#regexp_like) <br/>[REGEXP_REPLACE()](/functions-and-operators/string-functions.md#regexp_replace) <br/>[REGEXP_SUBSTR()](/functions-and-operators/string-functions.md#regexp_substr) <br/>[REPLACE()](/functions-and-operators/string-functions.md#replace) <br/>[REVERSE()](/functions-and-operators/string-functions.md#reverse) <br/>[RIGHT()](/functions-and-operators/string-functions.md#right), [RLIKE](/functions-and-operators/string-functions.md#rlike) <br/>[RTRIM()](/functions-and-operators/string-functions.md#rtrim) <br/>[SPACE()](/functions-and-operators/string-functions.md#space) <br/>[STRCMP()](/functions-and-operators/string-functions.md#strcmp) <br/>[SUBSTR()](/functions-and-operators/string-functions.md#substr) <br/>[SUBSTRING()](/functions-and-operators/string-functions.md#substring) <br/>[UPPER()](/functions-and-operators/string-functions.md#upper) |
 | [聚合函数](/functions-and-operators/aggregate-group-by-functions.md#group-by-聚合函数) | [COUNT()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_count) <br/>[COUNT(DISTINCT)](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_count-distinct) <br/>[SUM()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_sum) <br/>[AVG()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_avg) <br/>[MAX()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_max) <br/>[MIN()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_min) <br/>[VARIANCE()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_variance) <br/>[VAR_POP()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_var-pop) <br/>[STD()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_std) <br/>[STDDEV()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_stddev) <br/>[STDDEV_POP](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_stddev-pop) <br/>[VAR_SAMP()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_var-samp) <br/>[STDDEV_SAMP()](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_stddev-samp) <br/>[JSON_ARRAYAGG(key)](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_json-arrayagg) <br/>[JSON_OBJECTAGG(key, value)](https://dev.mysql.com/doc/refman/8.0/en/aggregate-functions.html#function_json-objectagg) |
 | [加密和压缩函数](/functions-and-operators/encryption-and-compression-functions.md#加密和压缩函数) | [MD5()](/functions-and-operators/encryption-and-compression-functions.md#md5) <br/>[SHA1(), SHA()](/functions-and-operators/encryption-and-compression-functions.md#sha1) <br/>[UNCOMPRESSED_LENGTH()](/functions-and-operators/encryption-and-compression-functions.md#uncompressed_length) |

tiflash/tiflash-supported-pushdown-calculations.md

@@ -30,7 +30,7 @@ TiFlash 支持部分算子的下推，支持的算子如下：
 
 | 表达式类型 | 运算 |
 | :-------------- | :------------------------------------- |
-| [数学函数](/functions-and-operators/numeric-functions-and-operators.md) | `+`, `-`, `/`, `*`, `%`, `>=`, `<=`, `=`, `!=`, `<`, `>`, `ROUND()`, `ABS()`, `FLOOR(int)`, `CEIL(int)`, `CEILING(int)`, `SQRT()`, `LOG()`, `LOG2()`, `LOG10()`, `LN()`, `EXP()`, `POW()`, `POWER()`, `SIGN()`, `RADIANS()`, `DEGREES()`, `CONV()`, `CRC32()`, `GREATEST(int/real)`, `LEAST(int/real)` |
+| [数学函数](/functions-and-operators/numeric-functions-and-operators.md) | `+`, `-`, `/`, `*`, `%`, `>=`, `<=`, `=`, `!=`, `<`, `>`, `ROUND()`, `ABS()`, `FLOOR(int)`, `CEIL(int)`, `CEILING(int)`, `SQRT()`, `LOG()`, `LOG2()`, `LOG10()`, `LN()`, `EXP()`, `POW()`, `POWER()`, `SIGN()`, `RADIANS()`, `DEGREES()`, `CONV()`, `CRC32()`, `GREATEST(int/real)`, `LEAST(int/real)`, `TRUNCATE()` |
 | [逻辑函数](/functions-and-operators/control-flow-functions.md)和[算子](/functions-and-operators/operators.md) | `AND`, `OR`, `NOT`, `CASE WHEN`, `IF()`, `IFNULL()`, `ISNULL()`, `IN`, `LIKE`, `ILIKE`, `COALESCE`, `IS` |
 | [位运算](/functions-and-operators/bit-functions-and-operators.md) | `&` (bitand), <code>\|</code> (bitor), `~` (bitneg), `^` (bitxor) |
 | [字符串函数](/functions-and-operators/string-functions.md) | `SUBSTR()`, `CHAR_LENGTH()`, `REPLACE()`, `CONCAT()`, `CONCAT_WS()`, `LEFT()`, `RIGHT()`, `ASCII()`, `LENGTH()`, `TRIM()`, `LTRIM()`, `RTRIM()`, `POSITION()`, `FORMAT()`, `LOWER()`, `UCASE()`, `UPPER()`, `SUBSTRING_INDEX()`, `LPAD()`, `RPAD()`, `STRCMP()` |