Categories:

String & Binary Functions (General) , Table Functions

# STRTOK_SPLIT_TO_TABLE¶

Tokenizes a string with the given set of delimiters and flattens the results into rows.

## Syntax¶

STRTOK_SPLIT_TO_TABLE(<string> [,<delimiter_list>])


## Arguments¶

Required:

string

Text to be tokenized.

Optional:

delimiter_list

Set of delimiters. Optional. Default value is a single space character.

## Returns¶

This returns a table.

The returned rows consist of a fixed set of columns:

+-----+-------+------ +
| SEQ | INDEX | VALUE |
|-----+------+--------|

SEQ

A unique sequence number associated with the input record; the sequence is not guaranteed to be gap-free or ordered in any particular way.

INDEX

The index of the element. One based.

VALUE

The value of the element of the flattened array.

Note

The columns of the original (correlated) table that was used as the source of data for this function are also accessible. If a single row from the original table resulted in multiple rows in the flattened view, the values in this input row are replicated to match the number of rows produced by STRTOK_SPLIT_TO_TABLE.

## Examples¶

Here is a simple example on constant input.

SELECT table1.value
FROM table(strtok_split_to_table('a.b', '.')) AS table1
ORDER BY table1.value;
+-------+
| VALUE |
|-------|
| a     |
| b     |
+-------+


The following two examples use the table and data created below:

CREATE OR REPLACE TABLE splittable (v VARCHAR);
INSERT INTO splittable (v) VALUES ('a b'), ('cde'), ('f|g'), ('');


This example shows usage of the function as a correlated table:

SELECT *
FROM splittable, LATERAL STRTOK_SPLIT_TO_TABLE(splittable.v, ' ')
ORDER BY SEQ, INDEX;
+-----+-----+-------+-------+
| V   | SEQ | INDEX | VALUE |
|-----+-----+-------+-------|
| a b |   1 |     1 | a     |
| a b |   1 |     2 | b     |
| cde |   2 |     1 | cde   |
| f|g |   3 |     1 | f|g   |
+-----+-----+-------+-------+


This example is the same as the preceding, except that it specifies multiple delimiters:

SELECT *
FROM splittable, LATERAL STRTOK_SPLIT_TO_TABLE(splittable.v, ' |')
ORDER BY SEQ, INDEX;
+-----+-----+-------+-------+
| V   | SEQ | INDEX | VALUE |
|-----+-----+-------+-------|
| a b |   1 |     1 | a     |
| a b |   1 |     2 | b     |
| cde |   2 |     1 | cde   |
| f|g |   3 |     1 | f     |
| f|g |   3 |     2 | g     |
+-----+-----+-------+-------+