使用字符串函数在Amazon Redshift中反序列化php对象

Question

I have a table in redshift in which a column is a PHP serialized object. I want to use redshift string functions and de-serialize the column and make another temporary table with the deserialized values. for example: the initial table would look like

| col A | |a:1:{i:145;s:2:"14";} | |a:1:{i:145;s:2:"15";} | |a:1:{i:145;s:2:"16";} |

The expected output temporary table for further processing is:

| Col A | Col B | | 145 | 14 | | 145 | 15 | | 145 | 16 |

How can I use redshift string functions to deserialize this object?

Answer 1

for your particular case it would work like this:

select 
 split_part(split_part('a:1:{i:145;s:2:"14";}',':',4),';',1)
,trim(split_part(split_part('a:1:{i:145;s:2:"14";}',':',6),';',1),'"');

if there can be other formats of this structure this isn't going to work

Answer 2

我想出的解决方案：

SELECT REGEXP_SUBSTR(SPLIT_PART(VALUE,';',1),'[^:]*$') as fieldName1, trim('"' FROM REGEXP_SUBSTR(SPLIT_PART(VALUE,';',2),'[^:]*$')) as fieldName2;