Fix a few minor typos

Author: Alexander Beedie

src/ast/data_type.rs

@@ -168,7 +168,7 @@ pub enum DataType {
     UnsignedInt(Option<u64>),
     /// Unsigned int4 with optional display width e.g. INT4 UNSIGNED or INT4(11) UNSIGNED
     UnsignedInt4(Option<u64>),
-    /// Unsigned integer with optional display width e.g. INTGER UNSIGNED or INTEGER(11) UNSIGNED
+    /// Unsigned integer with optional display width e.g. INTEGER UNSIGNED or INTEGER(11) UNSIGNED
     UnsignedInteger(Option<u64>),
     /// Unsigned integer type in [clickhouse]
     /// Note: UInt8 mean 8 bits in [clickhouse]
@@ -699,7 +699,7 @@ pub enum CharacterLength {
         /// Optional unit. If not informed, the ANSI handles it as CHARACTERS implicitly
         unit: Option<CharLengthUnits>,
     },
-    /// VARCHAR(MAX) or NVARCHAR(MAX), used in T-SQL (Miscrosoft SQL Server)
+    /// VARCHAR(MAX) or NVARCHAR(MAX), used in T-SQL (Microsoft SQL Server)
     Max,
 }
 

src/ast/mod.rs

@@ -2265,7 +2265,7 @@ pub enum Statement {
     /// SET [ SESSION | LOCAL ] ROLE role_name
     /// ```
     ///
-    /// Sets sesssion state. Examples: [ANSI][1], [Postgresql][2], [MySQL][3], and [Oracle][4]
+    /// Sets session state. Examples: [ANSI][1], [Postgresql][2], [MySQL][3], and [Oracle][4]
     ///
     /// [1]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#set-role-statement
     /// [2]: https://www.postgresql.org/docs/14/sql-set-role.html
@@ -2283,7 +2283,7 @@ pub enum Statement {
     /// ```
     ///
     /// Note: this is not a standard SQL statement, but it is supported by at
-    /// least MySQL and PostgreSQL. Not all MySQL-specific syntatic forms are
+    /// least MySQL and PostgreSQL. Not all MySQL-specific syntactic forms are
     /// supported yet.
     SetVariable {
         local: bool,

src/parser/mod.rs

@@ -8538,10 +8538,10 @@ impl<'a> Parser<'a> {
             })
         } else if variable.to_string() == "TRANSACTION" && modifier.is_none() {
             if self.parse_keyword(Keyword::SNAPSHOT) {
-                let snaphot_id = self.parse_value()?;
+                let snapshot_id = self.parse_value()?;
                 return Ok(Statement::SetTransaction {
                     modes: vec![],
-                    snapshot: Some(snaphot_id),
+                    snapshot: Some(snapshot_id),
                     session: false,
                 });
             }

src/tokenizer.rs

@@ -654,7 +654,7 @@ impl<'a> Tokenizer<'a> {
         Ok(())
     }
 
-    // Tokenize the identifer or keywords in `ch`
+    // Tokenize the identifier or keywords in `ch`
     fn tokenize_identifier_or_keyword(
         &self,
         ch: impl IntoIterator<Item = char>,