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Standardize comments on parsing optional keywords (#773)

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Andrew Lamb 2022-12-28 08:52:12 -05:00 • committed by GitHub
parent 61c661c234
commit b1a000f149
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1 changed files with 12 additions and 14 deletions
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26
src/parser.rs
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@ -1230,7 +1230,7 @@ impl<'a> Parser<'a> {
/// if `named` is `true`, came from an expression like `ARRAY[ex1, ex2]`
pub fn parse_array_expr(&mut self, named: bool) -> Result<Expr, ParserError> {
if self.peek_token().token == Token::RBracket {
let _ = self.next_token();
let _ = self.next_token(); // consume ]
Ok(Expr::Array(Array {
elem: vec![],
named,
@ -2723,8 +2723,7 @@ impl<'a> Parser<'a> {
let if_not_exists = self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
let names = self.parse_comma_separated(Parser::parse_object_name)?;
// Parse optional WITH
let _ = self.parse_keyword(Keyword::WITH);
let _ = self.parse_keyword(Keyword::WITH); // [ WITH ]
let optional_keywords = if dialect_of!(self is MsSqlDialect) {
vec![Keyword::AUTHORIZATION]
@ -3664,7 +3663,7 @@ impl<'a> Parser<'a> {
let object_type = self.expect_one_of_keywords(&[Keyword::TABLE, Keyword::INDEX])?;
match object_type {
Keyword::TABLE => {
let _ = self.parse_keyword(Keyword::ONLY);
let _ = self.parse_keyword(Keyword::ONLY); // [ ONLY ]
let table_name = self.parse_object_name()?;
let operation = if self.parse_keyword(Keyword::ADD) {
if let Some(constraint) = self.parse_optional_table_constraint()? {
@ -3711,7 +3710,7 @@ impl<'a> Parser<'a> {
let table_name = self.parse_object_name()?;
AlterTableOperation::RenameTable { table_name }
} else {
let _ = self.parse_keyword(Keyword::COLUMN);
let _ = self.parse_keyword(Keyword::COLUMN); // [ COLUMN ]
let old_column_name = self.parse_identifier()?;
self.expect_keyword(Keyword::TO)?;
let new_column_name = self.parse_identifier()?;
@ -3751,7 +3750,7 @@ impl<'a> Parser<'a> {
{
AlterTableOperation::DropPrimaryKey
} else {
let _ = self.parse_keyword(Keyword::COLUMN);
let _ = self.parse_keyword(Keyword::COLUMN); // [ COLUMN ]
let if_exists = self.parse_keywords(&[Keyword::IF, Keyword::EXISTS]);
let column_name = self.parse_identifier()?;
let cascade = self.parse_keyword(Keyword::CASCADE);
@ -3775,7 +3774,7 @@ impl<'a> Parser<'a> {
new_partitions: renames,
}
} else if self.parse_keyword(Keyword::CHANGE) {
let _ = self.parse_keyword(Keyword::COLUMN);
let _ = self.parse_keyword(Keyword::COLUMN); // [ COLUMN ]
let old_name = self.parse_identifier()?;
let new_name = self.parse_identifier()?;
let data_type = self.parse_data_type()?;
@ -3791,7 +3790,7 @@ impl<'a> Parser<'a> {
options,
}
} else if self.parse_keyword(Keyword::ALTER) {
let _ = self.parse_keyword(Keyword::COLUMN);
let _ = self.parse_keyword(Keyword::COLUMN); // [ COLUMN ]
let column_name = self.parse_identifier()?;
let is_postgresql = dialect_of!(self is PostgreSqlDialect);
@ -3834,7 +3833,6 @@ impl<'a> Parser<'a> {
})
}
Keyword::INDEX => {
let _ = self.parse_keyword(Keyword::ONLY);
let index_name = self.parse_object_name()?;
let operation = if self.parse_keyword(Keyword::RENAME) {
if self.parse_keyword(Keyword::TO) {
@ -3879,7 +3877,7 @@ impl<'a> Parser<'a> {
filename: self.parse_literal_string()?,
}
};
let _ = self.parse_keyword(Keyword::WITH);
let _ = self.parse_keyword(Keyword::WITH); // [ WITH ]
let mut options = vec![];
if self.consume_token(&Token::LParen) {
options = self.parse_comma_separated(Parser::parse_copy_option)?;
@ -5376,12 +5374,12 @@ impl<'a> Parser<'a> {
let join_operator_type = match peek_keyword {
Keyword::INNER | Keyword::JOIN => {
let _ = self.parse_keyword(Keyword::INNER);
let _ = self.parse_keyword(Keyword::INNER); // [ INNER ]
self.expect_keyword(Keyword::JOIN)?;
JoinOperator::Inner
}
kw @ Keyword::LEFT | kw @ Keyword::RIGHT => {
let _ = self.next_token();
let _ = self.next_token(); // consume LEFT/RIGHT
let is_left = kw == Keyword::LEFT;
let join_type = self.parse_one_of_keywords(&[
Keyword::OUTER,
@ -5430,8 +5428,8 @@ impl<'a> Parser<'a> {
}
}
Keyword::FULL => {
let _ = self.next_token();
let _ = self.parse_keyword(Keyword::OUTER);
let _ = self.next_token(); // consume FULL
let _ = self.parse_keyword(Keyword::OUTER); // [ OUTER ]
self.expect_keyword(Keyword::JOIN)?;
JoinOperator::FullOuter
}