Method parse_explain_schema

src/sql-parser/src/parser.rs:9271–9299

Parse an `EXPLAIN [KEY|VALUE] SCHEMA` statement assuming that the `EXPLAIN` token have already been consumed

(&mut self)

    /// Parse an `EXPLAIN [KEY|VALUE] SCHEMA` statement assuming that the `EXPLAIN` token
    /// have already been consumed
    fn parse_explain_schema(&mut self) -> Result<Statement<Raw>, ParserError> {
        let schema_for = match self.expect_one_of_keywords(&[KEY, VALUE])? {
            KEY => ExplainSinkSchemaFor::Key,
            VALUE => ExplainSinkSchemaFor::Value,
            _ => unreachable!(),
        };

        self.expect_keyword(SCHEMA)?;

        let format = if self.parse_keyword(AS) {
            // only json format is supported
            self.expect_keyword(JSON)?;
            Some(ExplainFormat::Json)
        } else {
            None
        };

        self.expect_keywords(&[FOR, CREATE])?;

        if let Statement::CreateSink(statement) = self.parse_create_sink()? {
            Ok(Statement::ExplainSinkSchema(ExplainSinkSchemaStatement {
                schema_for,
                format,
                statement,
            }))
        } else {
            unreachable!("only create sink can be returned here");
        }
    }

    /// Parse a `DECLARE` statement, assuming that the `DECLARE` token
    /// has already been consumed.