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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<string> 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<varchar> 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<string> 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<varchar> 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
> 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:
> 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<string> 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<varchar> 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]
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