SQL full text search, third party filters
Search indexing of PDF files is an essential feature which on SQL Server is (currently) only possible through installing a third party filter - which is not possible on Azure SQL databases
Luke Chung commented
Inability to support the searching of PDF and post-Office 2007 files is blocking the ability to migrate several databases and applications to the cloud.
Telling people that they need to save their Word documents in the Word 2003 format (doc vs. docx) or Excel 2003 (xlx vs. xlsx) format seems rather odd for Microsoft Azure to require. It's been 13 years since the new document formats were introduced. It'd be nice if SQL Azure could recognize them. I think the free SQL Express 2017 now supports these formats.
Full text search of pdf and docx would be a great feature to have
Not sure if this is exactly the same case, but we would like to use the Azure Media Indexer and then load the AIX files on SQL Database for further use. Unfortunately this can happen only with custom filters that currently Azure DB does not support..