Deprecated : The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456 datafusion::functions::core::expr_fn - Rust
Module expr_fn Copy item path Source arrow_cast Returns value2 if value1 is NULL; otherwise it returns value1 arrow_typeof Returns the Arrow type of the input expression. coalesce Returns coalesce(args...), which evaluates to the value of the first expr which is not NULL get_field Returns the value of the field with the given name from the struct greatest Returns greatest(args...), which evaluates to the greatest value in the list of expressions or NULL if all the expressions are NULL least Returns least(args...), which evaluates to the smallest value in the list of expressions or NULL if all the expressions are NULL named_struct Returns a struct with the given names and arguments pairs nullif Returns NULL if value1 equals value2; otherwise it returns value1. This can be used to perform the inverse operation of the COALESCE expression nvl Returns value2 if value1 is NULL; otherwise it returns value1 nvl2 Returns value2 if value1 is not NULL; otherwise, it returns value3. overlay replace the substring of string that starts at the start’th character and extends for count characters with new substring struct Returns a struct with the given arguments union_extract Returns the value of the field with the given name from the union when it’s selected, or NULL otherwise union_tag Returns the name of the currently selected field in the union