anchor.diff:      | INTERIORRINGN | INTERSECTS | INVISIBLE
       | ISCLOSED | ISEMPTY | ISNULL
       | ISSIMPLE | IS_FREE_LOCK | IS_IPV4 | IS_IPV4_COMPAT
  -    | IS_IPV4_MAPPED | IS_IPV6 | IS_USED_LOCK | LAST_INSERT_ID
  -    | LCASE | LEAST | LEFT | LENGTH | LINEFROMTEXT | LINEFROMWKB
  +    | IS_IPV4_MAPPED | IS_IPV6 | IS_USED_LOCK | LAG | LAST_INSERT_ID | LAST_VALUE
  +    | LCASE | LEAD | LEAST | LEFT | LENGTH | LINEFROMTEXT | LINEFROMWKB
       | LINESTRING | LINESTRINGFROMTEXT | LINESTRINGFROMWKB | LN
       | LOAD_FILE | LOCATE | LOG | LOG10 | LOG2 | LOWER | LPAD
       | LTRIM | MAKEDATE | MAKETIME | MAKE_SET | MASTER_POS_WAIT
  
positive.code:     | COMPRESS | CONCAT | CONCAT_WS | CONNECTION_ID | CONV
      | CONVERT_TZ | COS | COT | COUNT | CRC32
      | CREATE_ASYMMETRIC_PRIV_KEY | CREATE_ASYMMETRIC_PUB_KEY
      | CREATE_DH_PARAMETERS | CREATE_DIGEST | CROSSES | DATABASE | DATE
      | DATEDIFF | DATE_FORMAT | DAY | DAYNAME | DAYOFMONTH
      | DAYOFWEEK | DAYOFYEAR | DECODE | DEGREES | DES_DECRYPT
      | DES_ENCRYPT | DIMENSION | DISJOINT | ELT | ENCODE
      | ENCRYPT | ENDPOINT | ENVELOPE | EQUALS | EXP | EXPORT_SET
      | EXTERIORRING | EXTRACTVALUE | FIELD | FIND_IN_SET | FLOOR
      | FORMAT | FOUND_ROWS | FROM_BASE64 | FROM_DAYS
      | FROM_UNIXTIME | GEOMCOLLFROMTEXT | GEOMCOLLFROMWKB
      | GEOMETRYCOLLECTION | GEOMETRYCOLLECTIONFROMTEXT
  
negative.code:     | MPOLYFROMWKB | MULTILINESTRING | MULTILINESTRINGFROMTEXT
      | MULTILINESTRINGFROMWKB | MULTIPOINT | MULTIPOINTFROMTEXT
      | MULTIPOINTFROMWKB | MULTIPOLYGON | MULTIPOLYGONFROMTEXT
      | MULTIPOLYGONFROMWKB | NAME_CONST | NTH_VALUE | NTILE | NULLIF | NUMGEOMETRIES
      | NUMINTERIORRINGS | NUMPOINTS | OCT | OCTET_LENGTH | ORD
      | OVERLAPS | PERCENT_RANK | PERIOD_ADD | PERIOD_DIFF | PI | POINT
      | POINTFROMTEXT | POINTFROMWKB | POINTN | POLYFROMTEXT
      | POLYFROMWKB | POLYGON | POLYGONFROMTEXT | POLYGONFROMWKB
      | POSITION | POW | POWER | QUARTER | QUOTE | RADIANS | RAND | RANK
      | RANDOM_BYTES | RELEASE_LOCK | REVERSE | RIGHT | ROUND
      | ROW_COUNT | ROW_NUMBER | RPAD | RTRIM | SECOND | SEC_TO_TIME
      | SCHEMA | SESSION_USER | SESSION_VARIABLES_ADMIN
      | SHA | SHA1 | SHA2 | SIGN | SIN | SLEEP
      | SOUNDEX | SQL_THREAD_WAIT_AFTER_GTIDS | SQRT | SRID
  