[FLINK-26940] Add SUBSTRING_INDEX supported in SQL & Table API

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: dalongliu
• Created: 31/Mar/22 06:40
• Updated: 06/Apr/23 08:01

Description

Returns the substring of expr before count occurrences of the delimiter delim.

Syntax:

substring_index(expr, delim, count)

Arguments:

• expr: A STRING or BINARY expression.

• delim: An expression matching the type of expr specifying the delimiter.

• count: An INTEGER expression to count the delimiters.

Returns:

The result matches the type of expr.

If count is positive, everything to the left of the final delimiter (counting from the left) is returned.

If count is negative, everything to the right of the final delimiter (counting from the right) is returned.

Examples:

> SELECT substring_index('www.apache.org', '.', 2);
 www.apache 

See more:

• Hive
• Databricks SQL

Issue Links

• links to: GitHub Pull Request #20330