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Support SQLite CREATE VIRTUAL TABLE (#209)

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`CREATE VIRTUAL TABLE .. USING <module_name> (<module_args>)`

https://www.sqlite.org/lang_createvtab.html
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mz 2020-06-28 09:31:33 +08:00 • committed by GitHub
parent 0c83e5d9e8
commit a53f1d26ef
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5 changed files with 73 additions and 4 deletions
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28
src/parser.rs
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@ -55,6 +55,7 @@ pub enum IsLateral {
Lateral,
NotLateral,
}
use crate::ast::Statement::CreateVirtualTable;
use IsLateral::*;
impl From<TokenizerError> for ParserError {
@ -986,16 +987,35 @@ impl Parser {
self.parse_create_view()
} else if self.parse_keyword(Keyword::EXTERNAL) {
self.parse_create_external_table()
} else if self.parse_keyword(Keyword::VIRTUAL) {
self.parse_create_virtual_table()
} else if self.parse_keyword(Keyword::SCHEMA) {
self.parse_create_schema()
} else {
self.expected(
"TABLE, VIEW, INDEX or SCHEMA after CREATE",
self.peek_token(),
)
self.expected("an object type after CREATE", self.peek_token())
}
}
/// SQLite-specific `CREATE VIRTUAL TABLE`
pub fn parse_create_virtual_table(&mut self) -> Result<Statement, ParserError> {
self.expect_keyword(Keyword::TABLE)?;
let if_not_exists = self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
let table_name = self.parse_object_name()?;
self.expect_keyword(Keyword::USING)?;
let module_name = self.parse_identifier()?;
// SQLite docs note that module "arguments syntax is sufficiently
// general that the arguments can be made to appear as column
// definitions in a traditional CREATE TABLE statement", but
// we don't implement that.
let module_args = self.parse_parenthesized_column_list(Optional)?;
Ok(CreateVirtualTable {
name: table_name,
if_not_exists,
module_name,
module_args,
})
}
pub fn parse_create_schema(&mut self) -> Result<Statement, ParserError> {
let schema_name = self.parse_object_name()?;
Ok(Statement::CreateSchema { schema_name })