@uwdata/mosaic-sql/dist/src/ast/literal.js

SQL query construction and analysis.

import { LITERAL } from '../constants.js';
import { ExprNode } from './node.js';
export class LiteralNode extends ExprNode {
    /** The literal value. */
    value;
    /**
     * Instantiate an literal node.
     * @param value The literal value.
     */
    constructor(value) {
        super(LITERAL);
        this.value = value;
    }
    /**
     * Generate a SQL query string for this node.
     */
    toString() {
        return literalToSQL(this.value);
    }
}
export function literalToSQL(value) {
    switch (typeof value) {
        case 'number':
            return Number.isFinite(value) ? `${value}` : 'NULL';
        case 'string':
            return `'${value.replaceAll(`'`, `''`)}'`;
        case 'boolean':
            return value ? 'TRUE' : 'FALSE';
        default:
            if (value == null) {
                return 'NULL';
            }
            else if (value instanceof Date) {
                const ts = +value;
                if (Number.isNaN(ts))
                    return 'NULL';
                const y = value.getUTCFullYear();
                const m = value.getUTCMonth();
                const d = value.getUTCDate();
                return ts === Date.UTC(y, m, d)
                    ? `DATE '${y}-${m + 1}-${d}'` // utc date
                    : `epoch_ms(${ts})`; // timestamp
            }
            else if (value instanceof RegExp) {
                return `'${value.source}'`;
            }
            else {
                // otherwise rely on string coercion
                return `${value}`;
            }
    }
}
//# sourceMappingURL=literal.js.map