bytebase/bytebase · error

parse

Error message

parse

What it means

wtParseSelectBody wraps the underlying omniparser.Parse failure in a Go error with the message 'parse'. It fires when the SQL text of a view or materialized-view definition cannot be tokenized/parsed at all (syntax error, truncated definition, or parser incompatibility).

Source

Thrown at backend/plugin/schema/pg/walk_through_loader.go:1200

	sel, ok := node.(*ast.SelectStmt)
	if !ok {
		return nil, errors.Errorf("default %q: expected SelectStmt", expr)
	}
	if sel.TargetList == nil || len(sel.TargetList.Items) != 1 {
		return nil, errors.Errorf("default %q: expected 1 target", expr)
	}
	rt, ok := sel.TargetList.Items[0].(*ast.ResTarget)
	if !ok {
		return nil, errors.Errorf("default %q: expected ResTarget", expr)
	}
	return rt.Val, nil
}

// wtParseSelectBody parses a SQL string into *ast.SelectStmt.
func wtParseSelectBody(sql string) (*ast.SelectStmt, error) {
	nodes, err := omniparser.Parse(sql)
	if err != nil {
		return nil, errors.Wrap(err, "parse")
	}
	if nodes == nil || len(nodes.Items) != 1 {
		return nil, errors.Errorf("expected 1 statement, got %d", len(nodes.Items))
	}
	node := nodes.Items[0]
	if raw, ok := node.(*ast.RawStmt); ok {
		node = raw.Stmt
	}
	sel, ok := node.(*ast.SelectStmt)
	if !ok {
		return nil, errors.Errorf("expected SelectStmt, got %T", node)
	}
	return sel, nil
}

// ---- type ref extraction (local, no import from parser/pg) ----

type wtUserTypeRef struct {

View on GitHub (pinned to 1870550677)

Solutions

1. Print the wrapped cause (errors.Unwrap / %v of err) to see the exact syntax error and fix the view SQL accordingly
2. Re-dump the view definition from the source database (SELECT pg_get_viewdef) and verify it is complete
3. Check that the SQL does not rely on extensions or syntax unsupported by omniparser; simplify or register support
4. Upgrade the parser dependency if the view uses syntax newer than the parser supports

Example fix

-- before (truncated stored definition)
SELECT * FROM orders WHERE
-- after (complete definition)
SELECT * FROM orders WHERE status = 'open';

sel, err := wtParseSelectBody(viewSQL)
if err != nil {
    var parseErr *base.ParseError
    if errors.As(errors.Unwrap(err), &parseErr) {
        return fmt.Errorf("view %q SQL invalid at line %d: %w", name, parseErr.Line, err)
    }
    return err
}

When it happens

Trigger: wtInstallView or wtInstallMatView passing a view's stored SQL body (from pg_get_viewdef or a dump) to omniparser.Parse and the parser returning a non-nil error — e.g. truncated or syntactically invalid view SQL.

Common situations: Round-tripping schemas across Postgres versions where view definitions contain version-specific syntax; corrupted metadata; custom functions/types unknown to the parser making the text unparseable.

Understand the failure class

Background: "query failed", "%w: SQL error" — wrapped database query errors in Go libraries explained — this error's family across 3 libraries.

Related errors

• expected 1 statement, got %d
• expected SelectStmt, got %T
• function %q signature %q
• function %q arg %d
• parse

AI-assisted analysis of bytebase/bytebase@1870550677 (2026-09-06). Data as JSON: /api/errors/61616a0ecf1c1294. Report an issue: GitHub.