SQL - SAP HANA - REPLACE_REGEXPR in Column table

问题

I have some tables on SAP HANA and „create column table“ to combine multiple „raw tables“ and need to replace strings from one column in the newly created table. Tablename “Testsubject_status” Column name “STATUS”. The reason why I need to replace the strings, is to get a harmonized wording on specific entries. With the following example, it is hopefully more clear what I mean:

Table name: Testsubject_status --- Column: Status

Test me
Test him
Test with the ID 1237 is done
Test her
Test with the ID 928162 is done
Test with the ID 991 is done

The result should be

Table name: Testsubject_status --- Column: Status

Test me
Test him
Test is done
Test her
Test is done
Test is done

I tried the following:

CREATE COLUMN TABLE SCHEMATTT.Testsubject_status AS (
    Select
        Table1.Person AS “Person”,
        Table1.Vers AS “Vers”,
        Table2.Flnr AS “Flnr”,
        Table3.Status AS “Status”
FROM 
    SCHEMATTT.Table1, SCHEMATTT.Table2, SCHEMATTT.Table3 
WHERE SCHEMATTT.Table1.Person = SCHEMATTT.Table2.Person
AND SCHEMATTT.Table2.Flnr = SCHEMATTT.Table3.Flnr


SELECT
REPLACE_REGEXPR (‘with the id \d{1,}’ IN ‘TEST with %’ WITH ‘’) “replace_regexpr”
FROM SCHEMATTT.Testsubject_status
);

Creating the table is working. The Replace_Regexpr statement is only working if I do not run it together with the create column table statement and then only creates a table with one column and the entries ‘TEST with %’ in every row.

Additional info:

There is not only the “Test is done” string that needs to be harmonized, but a few others as well. So I need to use the replace statement more than once in this specific column “Status”
The "Test is done" Statement is not 1:1 with another Statement in the table, so the other statements can't be used in any way to do this :-)

Not sure if creating the table in this way is the best one, but I guess that’s another story 

Thank you in advance for your input!

This Picture is for clarification in the comments:

回答1:

@Mike, could you please try following SQLScript command

CREATE COLUMN TABLE Testsubject_status2 AS (
Select
    Table1.Person AS "Person",
    Table1.Vers AS "Vers",
    Table2.Flnr AS "Flnr",
    Table3.Status AS "Status",
    REPLACE_REGEXPR ('test with the id [[:digit:]]* is done' FLAG 'i' IN Table3.STATUS WITH 'Test is done') "replace_regexpr"
FROM 
   Table1, Table2, Table3 
WHERE Table1.Person = Table2.Person
AND Table2.Flnr = Table3.Flnr
);

This will produce a table with following sample data

Note that the STATUS column is replaced with a static text if there is a match for the given condition. Else the STATUS text is kept as it is

For the additional info, I added following expressions but I did not like it much Maybe there are better solutions

REPLACE_REGEXPR (
    '(test with the id|Deployment for the ID) [[:digit:]]* is (done|completed)' 
    FLAG 'i' 
    IN Table3.STATUS 
    WITH 
        case 
            when Table3.STATUS LIKE_REGEXPR('test') Flag 'i' then 'test is done' 
            when Table3.STATUS LIKE_REGEXPR('deploy') Flag 'i' then 'deployment is done' 
            else Table3.STATUS
        end 
)  as "replace_regexpr_ext"

You can add this add a new calculated column in your table definitions script

I assume you have following status text in your table data:

Deployment for the ID 234 is completed
Deploy development

来源：https://stackoverflow.com/questions/53260132/sql-sap-hana-replace-regexpr-in-column-table

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