17.10 - Argument Types and Rules - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)

Expressions passed to this function must have the following data types:

  • instring = VARCHAR or CLOB
  • name_to_search = VARCHAR
  • name_delimiters = VARCHAR
  • value_delimiters = VARCHAR
  • occurrence = INTEGER

The character set of instring, name_to_search, name_delimiters, and value_delimiters can be LATIN or UNICODE. If the parameter character sets are mixed, then all the parameters are converted to UNICODE.

You can also pass arguments with data types that can be converted to the above types using the implicit data type conversion rules that apply to UDFs.

The UDF implicit type conversion rules are more restrictive than the implicit type conversion rules normally used by Vantage. If an argument cannot be converted to the required data type following the UDF implicit conversion rules, it must be explicitly cast.

If a delimiter is part of a longer delimiter, the longer delimiter has precedence in the matching process.

Adjacent delimiters are treated as a single delimiter.