Replace values/Data Transformation Power Query Performance

[Anonymous]

Hi Power BI Community,

I needed to do a lot of changes in my Power Query. This is not good for the perfomance. 

Why does Power Query dont summarize these steps.

Data looks like this: 
= Table.ReplaceValue(#"Replaced Value57","AIMS 45-193i","AIMS",Replacer.ReplaceText,{"Tool Cluster"})
= Table.ReplaceValue(#"Replaced Value56","MeRiT MG 45","MeRiT",Replacer.ReplaceText,{"Tool Cluster"})

How can I combine this steps and also speed up the overall performance?

[v-yingjl · Accepted solution]

Hi @Anonymous ,

You can refer these documents to create a replacetable and a custom function to replace multiple fields at once:

1. Multiple replacements or translations in Power BI and Power Query 
2. Multiple Replacements of words in Power Query 
3. Replace multiple values in a single step 

let 
    ReplaceAll = (InputTable as table, ColumnName as text,ReplacementTable as table, optional StartRow as number) =>
    let
    ActualRow = if StartRow = null then 0 else StartRow,
    result = Table.ReplaceValue(InputTable,ReplacementTable{ActualRow}[Old],ReplacementTable{ActualRow}[New],Replacer.ReplaceText,{ColumnName}),
    NextRow = ActualRow + 1,
    OutputTable = if NextRow > (Table.RowCount(ReplacementTable)-1) then result 
    else
    @ReplaceAll(result,ColumnName,ReplacementTable,NextRow)
    in
    OutputTable
    in 
    ReplaceAll

Attached a sample file in the below, hopes it could help.

Best Regards,
Community Support Team _ Yingjie Li
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[amitchandak]

@Anonymous , see if this blog on bulk replace can help

https://www.howtoexcel.org/power-query/bulk-replace-values/