Function parse_block

nodedb/src/control/planner/procedural/parser/mod.rs:20–41

Parse a procedural SQL body into a `ProceduralBlock`. Input: raw SQL text starting with `BEGIN` and ending with `END`.

(input: &str)

///
/// Input: raw SQL text starting with `BEGIN` and ending with `END`.
pub fn parse_block(input: &str) -> Result<ProceduralBlock, ProceduralError> {
    let tokens = super::tokenizer::tokenize(input)?;
    let mut pos = 0;

    skip_token(&tokens, &mut pos, &Token::Begin)?;

    let statements = parse_statements(&tokens, &mut pos)?;

    let exception_handlers = if pos < tokens.len() && tokens[pos] == Token::Exception {
        exception::parse_exception_handlers(&tokens, &mut pos)?
    } else {
        Vec::new()
    };

    expect_token(&tokens, &mut pos, &Token::End)?;
    skip_if(&tokens, &mut pos, &Token::Semicolon);

    Ok(ProceduralBlock {
        statements,
        exception_handlers,
    })
}

/// Parse a sequence of statements until we hit END, ELSE, ELSIF, EXCEPTION, or end of tokens.
pub(crate) fn parse_statements(