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Support SHOW TABLES (#563)

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Alex Qyoun-ae 2022-08-11 16:24:40 +04:00 • committed by GitHub
parent 221e9c2bab
commit b6e36ad760
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3 changed files with 137 additions and 12 deletions
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45
src/parser.rs
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@ -3727,17 +3727,19 @@ impl<'a> Parser<'a> {
}
pub fn parse_show(&mut self) -> Result<Statement, ParserError> {
let extended = self.parse_keyword(Keyword::EXTENDED);
let full = self.parse_keyword(Keyword::FULL);
if self
.parse_one_of_keywords(&[
Keyword::EXTENDED,
Keyword::FULL,
Keyword::COLUMNS,
Keyword::FIELDS,
])
.parse_one_of_keywords(&[Keyword::COLUMNS, Keyword::FIELDS])
.is_some()
{
self.prev_token();
Ok(self.parse_show_columns()?)
Ok(self.parse_show_columns(extended, full)?)
} else if self.parse_keyword(Keyword::TABLES) {
Ok(self.parse_show_tables(extended, full)?)
} else if extended || full {
Err(ParserError::ParserError(
"EXTENDED/FULL are not supported with this type of SHOW query".to_string(),
))
} else if self.parse_one_of_keywords(&[Keyword::CREATE]).is_some() {
Ok(self.parse_show_create()?)
} else if self.parse_keyword(Keyword::VARIABLES)
@ -3780,10 +3782,11 @@ impl<'a> Parser<'a> {
Ok(Statement::ShowCreate { obj_type, obj_name })
}
pub fn parse_show_columns(&mut self) -> Result<Statement, ParserError> {
let extended = self.parse_keyword(Keyword::EXTENDED);
let full = self.parse_keyword(Keyword::FULL);
self.expect_one_of_keywords(&[Keyword::COLUMNS, Keyword::FIELDS])?;
pub fn parse_show_columns(
&mut self,
extended: bool,
full: bool,
) -> Result<Statement, ParserError> {
self.expect_one_of_keywords(&[Keyword::FROM, Keyword::IN])?;
let object_name = self.parse_object_name()?;
let table_name = match self.parse_one_of_keywords(&[Keyword::FROM, Keyword::IN]) {
@ -3804,6 +3807,24 @@ impl<'a> Parser<'a> {
})
}
pub fn parse_show_tables(
&mut self,
extended: bool,
full: bool,
) -> Result<Statement, ParserError> {
let db_name = match self.parse_one_of_keywords(&[Keyword::FROM, Keyword::IN]) {
Some(_) => Some(self.parse_identifier()?),
None => None,
};
let filter = self.parse_show_statement_filter()?;
Ok(Statement::ShowTables {
extended,
full,
db_name,
filter,
})
}
pub fn parse_show_statement_filter(
&mut self,
) -> Result<Option<ShowStatementFilter>, ParserError> {