So, here's the data-table that I came up with:ĬONVERT( UNCOMPRESS( e.errorData ) USING 'utf8' ) AS errorData,ĬONVERT( UNCOMPRESS( e.metaData ) USING 'utf8' ) AS metaData, In the MySQL documentation, it recommends that the compressed data be stored in a Blob or VarBinary column type. To start exploring, I want to create my data-access object - the ColdFusion component which moves data into and out of the database. After all, I'm not querying this data very often and, when I do query it, I never have to search on those "data" fields - I just have to get them out of the database and display them on the page. So, going back to the idea of an error log that has to store lots of stack traces, exception objects, and meta data, it feels like the kind of context in which data-compression would make sense. That said, I'm still interested in trying it out. But, I can point you to this Percona blog post that talks about some of the considerations in terms of performance and storage. Since this is just an experiment, and the first time that I have ever used these functions, I won't pretend to have any advice on when it's best to use them. This seems like it may be useful for tables that store a lot of long-text data, such as an error log. I had never heard of these before but, they do exactly what you think they might - compress and uncompress text values. After saving at UTF-8 in Notepad, that resolved the symbol issue.The other day, I was talking to Alexander Rubin from Percona about some MySQL optimization techniques when he mentioned that MySQL has compress() and uncompress() functions. Upon opening the file in Notepad, it appears the file was encoded in ANSI, even though excel states the file is encoding in UTF-8 when I open it. The sheet is being saved as UTF-8 CSV and the data was exporting from Salesforce using data loader 38.0.Ĭan someone explain why this character is returning the Blob is not a Valid UTF-8 String even though the character appears to be a UTF-8 character? The "–" is apparently still a unicode character: I am returned with a Blob is not a Valid UTF-8 String error when parsing the character: "–" different from "-". I created a CSV parser that parses CSV's from static resources.
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