HANA: Split string?

问题:

Is there a way to split a string in HANA?

Something similar to the equivalent in SQL Server: SELECT * FROM dbo.fnSplitString('valueA,valueB', ',')

回答1:

Try this,

Refer Here

CREATE PROCEDURE SPLIT_TEST(TEXT nvarchar(100)) AS BEGIN   declare _items nvarchar(100) ARRAY;   declare _text nvarchar(100);   declare _index integer;   _text := :TEXT;   _index := 1;    WHILE LOCATE(:_text,',') > 0 DO   _items[:_index] := SUBSTR_BEFORE(:_text,',');   _text := SUBSTR_AFTER(:_text,',');   _index := :_index + 1;   END WHILE;   _items[:_index] := :_text;    rst = UNNEST(:_items) AS ("items");   SELECT * FROM :rst; END;   CALL SPLIT_TEST('A,B,C,E,F') 

回答2:

Until the SP10, you need to create a function to SPLIT strings.

• If your need is get some char, you can use SUBSTR()

• On SP9 or later, you can work with REGEX

回答3:

Another way of splitting a string is with an outbound variable using table types:

CREATE TYPE UTIL_VARCHAR_LIST AS TABLE (     VarcharValue Varchar(5000) );  CREATE PROCEDURE UTIL_SPLIT_STRING (     IN iv_split_string Varchar(5000),     IN iv_split_character Varchar(1) DEFAULT ',',     OUT ot_string_list UTIL_VARCHAR_LIST ) LANGUAGE SQLSCRIPT AS BEGIN     DECLARE TEMP_STR VARCHAR(5000) := :iv_split_string || :iv_split_character;     DECLARE OUT_VAR VARCHAR(5000) ARRAY;     DECLARE POS INTEGER :=1;     DECLARE FLAG INTEGER := 1;     DECLARE LEFT_STR VARCHAR(5000);      WHILE(LENGTH(:TEMP_STR) > 0 )     DO         LEFT_STR := SUBSTR_BEFORE (:TEMP_STR,:iv_split_character);         TEMP_STR := SUBSTR_AFTER (:TEMP_STR,:LEFT_STR || :iv_split_character);         OUT_VAR[POS] := LEFT_STR;         POS := :POS + 1;     END WHILE;      ot_string_list = UNNEST(:OUT_VAR) AS ("VARCHARVALUE"); END; 

回答4:

I know this question is a bit old, but I never found a good solution. So I created a Table UDF for this, and I think it's better than calling a procedure for this, since you don't need to be creating an addittional variable. Well, here is the code, hope it helps!

The credits go to Peder Rice, since I only adapted his code. Cheers!

    FUNCTION "TF_SPLIT_STRING"  (     i_string nvarchar(255) )      RETURNS table(type char(1), value nvarchar(255))     LANGUAGE SQLSCRIPT     SQL SECURITY INVOKER AS BEGIN     --> DECLARATIONS     -- The remaining string after checking for the delimiter     declare v_remaining VARCHAR(256)    := :i_string;     -- The current vale that is being handled     declare v_current   VARCHAR(255)    := '';      -- The current positions of the resulting arrays     declare v_pos_include   INTEGER := 1;     declare v_pos_exclude   INTEGER := 1;      -- The arrays containing the results     declare a_include   VARCHAR(12) array := ARRAY(0);     declare a_exclude   VARCHAR(12) array := ARRAY(0);      -- The delimiter and the excluder     declare v_delimiter char(1) := ',';     declare v_excluder char(1) := '-';      --> SETUP BLOCK     if substr(:v_remaining, length(:v_remaining), 1)  :v_delimiter     then         v_remaining := :v_remaining || :v_delimiter;     end if;      --> EXECUTION BLOCK     --  While there is a string to process     --      ->  Split the string into the current value and the remaining     --      ->  Check if there is an excluder character in the current value     --      ->  If an excluder character is found, push the current value,      --          without the excluder, to the resulting array of excluding values     --      ->  If no excluder is found, push the value to the resulting array     --          of including values     --      ->  The corresponding position variable is incremented accordingly     while( LENGTH(:v_remaining) > 0 )     do         v_current := SUBSTR_BEFORE (:v_remaining,:v_delimiter);         v_remaining := SUBSTR_AFTER (:v_remaining, :v_current || :v_delimiter);          if substring(:v_current, 1, 1) = :v_excluder         then             a_exclude[v_pos_exclude] := SUBSTR_AFTER (:v_current, :v_excluder);             v_pos_exclude := :v_pos_exclude + 1;          else             a_include[v_pos_include] := v_current;             v_pos_include := :v_pos_include + 1;          end if;     end while;      --> ASSIGNMENTS BLOCK     -- format counter and divisions as table     o_include = unnest(:a_include) AS ("VALUE");     o_exclude = unnest(:a_exclude) AS ("VALUE");      return          select  'I' as type, value from :o_include         union all         select  'E' as type, value from :o_exclude         ;  END; 

文章来源: HANA: Split string?