Select into statement

[not-night-but]

Add select into as its own statement type.

Current implementation only supports psql and mssql statements like SELECT * INTO tab2 FROM tab1.

mysql has a similar statement, SELECT * FROM tab1 INTO [outfile|var] that I think we need to consider, but I feel like it might need to be a separate statement type? psql's version of this actually creates a table, whereas mysql exports to a file or creates a variable so I'm not sure how we want to classify that.

[MasterOdin]

I think labelling it a modification for mysql is fine for all intents and purposes, and agree it should be included, though detecting it is a bit more complicated given that it follows the FROM keyword vs before. Probably best to leave it as a follow-up for now.

[not-night-but]

@MasterOdin Okay done! So for mssql and psql it is specifically SELECT * INTO tab FROM tab2 that we support. Mysql technically supports the into clause before and after the FROM clause, so we allow for that only for mysql.