[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-09-08 Thread Flink Jira Bot (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Flink Jira Bot updated FLINK-32706:
---
Labels: pull-request-available stale-assigned  (was: pull-request-available)

I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help 
the community manage its development. I see this issue is assigned but has not 
received an update in 30 days, so it has been labeled "stale-assigned".
If you are still working on the issue, please remove the label and add a 
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feedback, please consider this a reminder to the committer/reviewer. Flink is a 
very active project, and so we appreciate your patience.
If you are no longer working on the issue, please unassign yourself so someone 
else may work on it.


> Add SPLIT(STRING) support in SQL & Table API
> 
>
> Key: FLINK-32706
> URL: https://issues.apache.org/jira/browse/FLINK-32706
> Project: Flink
>  Issue Type: Improvement
>Reporter: Hanyu Zheng
>Assignee: Hanyu Zheng
>Priority: Major
>  Labels: pull-request-available, stale-assigned
>
> SPLIT Function
> Description
> Splits a string into an array of substrings, based on a delimiter.
> Syntax
> The syntax for the SPLIT function is:
> {code:java}
> SPLIT(col1, delimiter){code}
> Splits a string into an array of substrings based on a delimiter. If the 
> delimiter is not found, then the original string is returned as the only 
> element in the array. If the delimiter is empty, then all characters in the 
> string are split. If either, string or delimiter, are NULL, then a NULL value 
> is returned.
> If the delimiter is found at the beginning or end of the string, or there are 
> contiguous delimiters, then an empty space is added to the array.
> Example
> Let's look at some  function examples and explore how to use the SPLIT 
> function.
> For example:
>  
> {code:java}
> SELECT SPLIT('abcdefg', 'c');
> Result: ['ab', 'defg']
> {code}
> see also:
> 1. ksqlDB Split function
> ksqlDB provides a scalar function named {{SPLIT}} which splits a string into 
> an array of substrings based on a delimiter.
> Syntax: {{SPLIT(string, delimiter)}}
> For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.
> [https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split]
> 2. Apache Hive Split function
> Hive offers a function named {{split}} which splits a string around a 
> specified delimiter and returns an array of strings.
> Syntax: {{array split(string str, string pat)}}
> For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF
> 3. Spark SQL Split function
> Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
> Hive.
> Syntax: {{split(str, pattern[, limit])}}
> Here, {{limit}} is an optional parameter to specify the maximum length of the 
> returned array.
> For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
> "twoBthreeC"]{}}}.
> [https://spark.apache.org/docs/latest/api/sql/index.html#split]
> 4. Presto Split function
> Presto offers a function named {{split}} which splits a string around a 
> regular expression and returns an array of strings.
> Syntax: {{array split(string str, string regex)}}
> For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.
> [https://prestodb.io/docs/current/functions/string.html]



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[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-07-31 Thread ASF GitHub Bot (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

ASF GitHub Bot updated FLINK-32706:
---
Labels: pull-request-available  (was: )

> Add SPLIT(STRING) support in SQL & Table API
> 
>
> Key: FLINK-32706
> URL: https://issues.apache.org/jira/browse/FLINK-32706
> Project: Flink
>  Issue Type: Improvement
>Reporter: Hanyu Zheng
>Priority: Major
>  Labels: pull-request-available
>
> SPLIT Function
> Description
> Splits a string into an array of substrings, based on a delimiter.
> Syntax
> The syntax for the SPLIT function is:
> {code:java}
> SPLIT(col1, delimiter){code}
> Splits a string into an array of substrings based on a delimiter. If the 
> delimiter is not found, then the original string is returned as the only 
> element in the array. If the delimiter is empty, then all characters in the 
> string are split. If either, string or delimiter, are NULL, then a NULL value 
> is returned.
> If the delimiter is found at the beginning or end of the string, or there are 
> contiguous delimiters, then an empty space is added to the array.
> Example
> Let's look at some  function examples and explore how to use the SPLIT 
> function.
> For example:
>  
> {code:java}
> SELECT SPLIT('abcdefg', 'c');
> Result: ['ab', 'defg']
> {code}
> see also:
> 1. ksqlDB Split function
> ksqlDB provides a scalar function named {{SPLIT}} which splits a string into 
> an array of substrings based on a delimiter.
> Syntax: {{SPLIT(string, delimiter)}}
> For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.
> [https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split]
> 2. Apache Hive Split function
> Hive offers a function named {{split}} which splits a string around a 
> specified delimiter and returns an array of strings.
> Syntax: {{array split(string str, string pat)}}
> For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF
> 3. Spark SQL Split function
> Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
> Hive.
> Syntax: {{split(str, pattern[, limit])}}
> Here, {{limit}} is an optional parameter to specify the maximum length of the 
> returned array.
> For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
> "twoBthreeC"]{}}}.
> [https://spark.apache.org/docs/latest/api/sql/index.html#split]
> 4. Presto Split function
> Presto offers a function named {{split}} which splits a string around a 
> regular expression and returns an array of strings.
> Syntax: {{array split(string str, string regex)}}
> For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.
> [https://prestodb.io/docs/current/functions/string.html]



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[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-07-31 Thread Hanyu Zheng (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hanyu Zheng updated FLINK-32706:

Description: 
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

1. ksqlDB Split function

ksqlDB provides a scalar function named {{SPLIT}} which splits a string into an 
array of substrings based on a delimiter.

Syntax: {{SPLIT(string, delimiter)}}

For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.

[https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split]

2. Apache Hive Split function

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF

3. Spark SQL Split function

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

[https://spark.apache.org/docs/latest/api/sql/index.html#split]

4. Presto Split function

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

[https://prestodb.io/docs/current/functions/string.html]

  was:
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

1. ksqlDB Split function

ksqlDB provides a scalar function named {{SPLIT}} which splits a string into an 
array of substrings based on a delimiter.

Syntax: {{SPLIT(string, delimiter)}}

For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.

https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split

2. Apache Hive Split function

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

3. Spark SQL Split function

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

https://spark.apache.org/docs/latest/api/sql/index.html#split

4. Presto Split function

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

https://prestodb.io/docs/current/functions/string.html


> Add SPLIT(STRING) support in SQL & Table API
> 
>
> Key: FLINK-32706
>   

[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-07-31 Thread Hanyu Zheng (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hanyu Zheng updated FLINK-32706:

Description: 
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

1. ksqlDB Split function

ksqlDB provides a scalar function named {{SPLIT}} which splits a string into an 
array of substrings based on a delimiter.

Syntax: {{SPLIT(string, delimiter)}}

For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.

https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split

2. Apache Hive Split function

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

3. Spark SQL Split function

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

https://spark.apache.org/docs/latest/api/sql/index.html#split

4. Presto Split function

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

https://prestodb.io/docs/current/functions/string.html

  was:
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

1. ksqlDB Split function

ksqlDB provides a scalar function named {{SPLIT}} which splits a string into an 
array of substrings based on a delimiter.

Syntax: {{SPLIT(string, delimiter)}}

For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.

Reference link: [ksqlDB 
Documentation|https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split]

2. Apache Hive Split function

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

3. Spark SQL Split function

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

Reference link: [Spark SQL Built-in 
Functions|https://spark.apache.org/docs/latest/api/sql/index.html#split]

4. Presto Split function

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Presto 

[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-07-31 Thread Hanyu Zheng (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hanyu Zheng updated FLINK-32706:

Description: 
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

1. ksqlDB Split function

ksqlDB provides a scalar function named {{SPLIT}} which splits a string into an 
array of substrings based on a delimiter.

Syntax: {{SPLIT(string, delimiter)}}

For example: {{SPLIT('a,b,c', ',')}} will return {{{}['a', 'b', 'c']{}}}.

Reference link: [ksqlDB 
Documentation|https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split]

2. Apache Hive Split function

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

3. Spark SQL Split function

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

Reference link: [Spark SQL Built-in 
Functions|https://spark.apache.org/docs/latest/api/sql/index.html#split]

4. Presto Split function

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Presto 
Documentation|https://prestodb.io/docs/current/functions/string.html]

  was:
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:
 # *Apache Hive Split function*

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

 # *Spark SQL Split function*

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

Reference link: [Spark SQL Built-in 
Functions|https://spark.apache.org/docs/latest/api/sql/index.html#split]

 # *Presto Split function*

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Presto 
Documentation|https://prestodb.io/docs/current/functions/string.html]


> Add SPLIT(STRING) support in SQL & Table API
> 
>
> Key: FLINK-32706
> URL: https://issues.apache.org/jira/browse/FLINK-32706
> Project: Flink
>  

[jira] [Updated] (FLINK-32706) Add SPLIT(STRING) support in SQL & Table API

2023-07-31 Thread Hanyu Zheng (Jira)


 [ 
https://issues.apache.org/jira/browse/FLINK-32706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Hanyu Zheng updated FLINK-32706:

Description: 
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:
 # *Apache Hive Split function*

Hive offers a function named {{split}} which splits a string around a specified 
delimiter and returns an array of strings.

Syntax: {{array split(string str, string pat)}}

For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Hive Language Manual 
UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]

 # *Spark SQL Split function*

Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
Hive.

Syntax: {{split(str, pattern[, limit])}}

Here, {{limit}} is an optional parameter to specify the maximum length of the 
returned array.

For example: {{split('oneAtwoBthreeC', '[ABC]', 2)}} will return {{{}["one", 
"twoBthreeC"]{}}}.

Reference link: [Spark SQL Built-in 
Functions|https://spark.apache.org/docs/latest/api/sql/index.html#split]

 # *Presto Split function*

Presto offers a function named {{split}} which splits a string around a regular 
expression and returns an array of strings.

Syntax: {{array split(string str, string regex)}}

For example: {{split('a.b.c', '\.')}} will return {{{}["a", "b", "c"]{}}}.

Reference link: [Presto 
Documentation|https://prestodb.io/docs/current/functions/string.html]

  was:
SPLIT Function

Description
Splits a string into an array of substrings, based on a delimiter.

Syntax
The syntax for the SPLIT function is:
{code:java}
SPLIT(col1, delimiter){code}
Splits a string into an array of substrings based on a delimiter. If the 
delimiter is not found, then the original string is returned as the only 
element in the array. If the delimiter is empty, then all characters in the 
string are split. If either, string or delimiter, are NULL, then a NULL value 
is returned.

If the delimiter is found at the beginning or end of the string, or there are 
contiguous delimiters, then an empty space is added to the array.

Example
Let's look at some  function examples and explore how to use the SPLIT function.

For example:

 
{code:java}
SELECT SPLIT('abcdefg', 'c');
Result: ['ab', 'defg']

{code}
see also:

ksqldb: 
https://docs.ksqldb.io/en/0.8.1-ksqldb/developer-guide/ksqldb-reference/scalar-functions/#split


> Add SPLIT(STRING) support in SQL & Table API
> 
>
> Key: FLINK-32706
> URL: https://issues.apache.org/jira/browse/FLINK-32706
> Project: Flink
>  Issue Type: Improvement
>Reporter: Hanyu Zheng
>Priority: Major
>
> SPLIT Function
> Description
> Splits a string into an array of substrings, based on a delimiter.
> Syntax
> The syntax for the SPLIT function is:
> {code:java}
> SPLIT(col1, delimiter){code}
> Splits a string into an array of substrings based on a delimiter. If the 
> delimiter is not found, then the original string is returned as the only 
> element in the array. If the delimiter is empty, then all characters in the 
> string are split. If either, string or delimiter, are NULL, then a NULL value 
> is returned.
> If the delimiter is found at the beginning or end of the string, or there are 
> contiguous delimiters, then an empty space is added to the array.
> Example
> Let's look at some  function examples and explore how to use the SPLIT 
> function.
> For example:
>  
> {code:java}
> SELECT SPLIT('abcdefg', 'c');
> Result: ['ab', 'defg']
> {code}
> see also:
>  # *Apache Hive Split function*
> Hive offers a function named {{split}} which splits a string around a 
> specified delimiter and returns an array of strings.
> Syntax: {{array split(string str, string pat)}}
> For example: {{split('a,b,c', ',')}} will return {{{}["a", "b", "c"]{}}}.
> Reference link: [Hive Language Manual 
> UDF|https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF]
>  # *Spark SQL Split function*
> Spark SQL also offers a function named {{{}split{}}}, similar to the one in 
> Hive.
> Syntax: {{split(str,