sunjincheng created FLINK-6926:
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Summary: Add MD5/SHA1/SHA2 supported in SQL
Key: FLINK-6926
URL: https://issues.apache.org/jira/browse/FLINK-6926
Project: Flink
Issue Type: Sub-task
Components: Table API & SQL
Affects Versions: 1.4.0
Reporter: sunjincheng
MD5(str)Calculates an MD5 128-bit checksum for the string. The value is
returned as a string of 32 hexadecimal digits, or NULL if the argument was
NULL. The return value can, for example, be used as a hash key. See the notes
at the beginning of this section about storing hash values efficiently.
The return value is a nonbinary string in the connection character set.
* Example:
MD5('testing') - 'ae2b1fca515949e5d54fb22b8ed95575'
* See more:
** [MySQL|
https://dev.mysql.com/doc/refman/5.7/en/encryption-functions.html#function_sha1]
SHA1(str), SHA(str)Calculates an SHA-1 160-bit checksum for the string, as
described in RFC 3174 (Secure Hash Algorithm). The value is returned as a
string of 40 hexadecimal digits, or NULL if the argument was NULL. One of the
possible uses for this function is as a hash key. See the notes at the
beginning of this section about storing hash values efficiently. You can also
use SHA1() as a cryptographic function for storing passwords. SHA() is
synonymous with SHA1().
The return value is a nonbinary string in the connection character set.
* Example:
SHA1('abc') -> 'a9993e364706816aba3e25717850c26c9cd0d89d'
SHA2(str, hash_length)Calculates the SHA-2 family of hash functions (SHA-224,
SHA-256, SHA-384, and SHA-512). The first argument is the cleartext string to
be hashed. The second argument indicates the desired bit length of the result,
which must have a value of 224, 256, 384, 512, or 0 (which is equivalent to
256). If either argument is NULL or the hash length is not one of the permitted
values, the return value is NULL. Otherwise, the function result is a hash
value containing the desired number of bits. See the notes at the beginning of
this section about storing hash values efficiently.
The return value is a nonbinary string in the connection character set.
* Example:
SHA2('abc', 224) -> '23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7'
* See more:
** [MySQL|
https://dev.mysql.com/doc/refman/5.7/en/encryption-functions.html#function_sha2]
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