@adonis-agora/agent/dist/src/data/limit.js

Governed, durable-backed AI agent (chat + tool-calling + governance) for AdonisJS — part of the Agora ecosystem.

/**
 * Ensures a SELECT returns at most `max` rows. If the statement already carries
 * a LIMIT it is returned unchanged; otherwise it is wrapped in a bounding
 * subquery (`SELECT * FROM (<sql>) AS subq LIMIT <max>`) so any ORDER BY /
 * GROUP BY / UNION inside `sql` is preserved.
 *
 * The `node-sql-parser` `Parser` is injected (see {@link loadSqlParser}) so this file never imports the
 * optional peer at module load.
 */
export function injectLimit(parser, sql, max) {
    const trimmed = sql.trim().replace(/;\s*$/, '');
    if (hasLimit(parser, trimmed))
        return trimmed;
    return `SELECT * FROM (${trimmed}) AS subq LIMIT ${max}`;
}
function hasLimit(parser, sql) {
    try {
        const parsed = parser.astify(sql, { database: 'MySQL' });
        const statement = (Array.isArray(parsed) ? parsed[0] : parsed);
        const limit = statement?.limit;
        return Boolean(limit && Array.isArray(limit.value) && limit.value.length > 0);
    }
    catch {
        // If we can't parse it here, fall back to wrapping — the validator already
        // ran and accepted it, so wrapping is the safe choice.
        return false;
    }
}
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