Text expression functions in Process Mining, including LEFT for extracting leftmost characters and other string operations available in transformation logic.

Returns the leftmost characters from a text field or expression result. The number of characters returned is indicated by the numeric field or expression specified by LENGTH OF CHARACTERS.

LEFT <Text field or Expression> NUMBER OF CHARACTERS <Numeric field or expression>

Only text values can be used for LEFT. Only numeric values can be used for NUMBER OF CHARACTERS

If any of the inputs is NULL, the result is NULL.

LEFT Case type NUMBER OF CHARACTERS 5

Returns the rightmost characters from a text field or expression result. The number of characters returned is indicated by the numeric field or expression specified by LENGTH OF CHARACTERS.

RIGHT <Text field or Expression> NUMBER OF CHARACTERS <Numeric field or expression>

Only text values can be used for RIGHT. Only numeric values can be used for NUMBER OF CHARACTERS

If any of the inputs is NULL, the result is NULL.

RIGHT Case type LENGTH OF CHARACTERS 5

Returns a part of the text field value or expression result. The number of characters to be returned is indicated by the numeric field value or expression result specified in LENGTH OF CHARACTERS and the start position is defined by STARTING FROM CHARACTER.

SUBSTRING <Text field or Expression> NUMBER OF CHARACTERS <Numeric field or expression> STARTING FROM CHARACTER <Numeric field or Expression>

Only text values can be used for SUBSTRING. Only numeric values can be used for NUMBER OF CHARACTERS and STARTING FROM CHARACTER.

If any of the inputs is NULL, the result is NULL.

SUBSTRING Phonenumber = "1-800-123-4567" NUMBER OF CHARACTERS 3 STARTING FROM CHARACTER 3 (Returns the 3-digit area code 800)

Concatenates two or more text field values or expression results into one text value.

CONCAT <Text field or Expression> + <Text field or Expression> [+ <Text field or Expression>]

Only text values can be used.

NULL values are not included in the result. For example CONCAT('A', NULL, 'B') returns AB.

CONCAT (Purchase_Order_ID,'-',Purchase_order_item_ID (creates a new CaseID by merging the Purchase_Order_ID and the Purchase-Order_Item ID.)

Returns the first non-NULL value in a list of values defined by expressions, fields, or constants.

COALESCE <Expression or Field or Constant> + <Expression or Field or Constant> [+ <Expression or Field or Constant>]

All values can be used.

If all values in the list are NULL, then the COALESCE function will return NULL.

COALSCE (Purchase_order_ID, Invoice_ID) (Returns the first non NULL value to check if there are Invoices created without a Purchase order.