Prepare for 0.55.0 release: Version and CHANGELOG

[alamb]

Part of

• Release sqlparser-rs version 0.55.0 #1671

1. Updates the version
2. Adds a changelog. See rendered version here: https://github.com/alamb/sqlparser-rs/blob/alamb/prepare_0.55.0/changelog/0.55.0.md

[alamb]

I also figured I would highlight some particularly significant changes

[mvzink]

I would suggest also mentioning the changes from #1739 here because it changes the names of several DataType variants and could be pretty disruptive.

[alamb]

FYI @iffyio

[iffyio]

LGTM!

[lovasoa]

Can we add a small migration guide to minimize the impact of the Expr::Value change ? I suggest:

Migrating usages of Expr::Value

Since v0.55, sqlparser the Expr::Value enum variant contains a ValueWithSpan instead of a Value. Here is how to migrate.

When pattern matching

- Expr::Value(Value::SingleQuotedString(my_string)) => { ... }
+ Expr::Value(ValueWithSpan{ value: Value::SingleQuotedString(my_string), span: _ }) => { ... }

When creating an Expr

Use the new Expr::value method (notice the lowercase v), which will create a ValueWithSpan containing an empty span :

- Expr::Value(Value::SingleQuotedString(my_string))
+ Expr::value(Value::SingleQuotedString(my_string))

[alamb]

Can we add a small migration guide to minimize the impact of the Expr::Value change ? I suggest:

Thank you -- added in db7911b

[alamb]

Inpired by @lovasoa I also pushed a commit with a note about ObjectName

• 15f99a6

Migrating usages of ObjectName

In v0.55 of sqlparser, the ObjectName structure has been changed as shown below. Here is now to migrate.

- pub struct ObjectName(pub Vec<Ident>);
+ pub struct ObjectName(pub Vec<ObjectNamePart>)

When constructing ObjectName

Use the From impl:

- name: ObjectName(vec![Ident::new("f")]),
+ name: ObjectName::from(vec![Ident::new("f")]),

Accessing Spans

Use the span() function

- name.span
+ name.span()

[alamb]

Pushing this and will now make the release