@uwdata/mosaic-sql/dist/src/ast/column-ref.js

SQL query construction and analysis.

import { COLUMN_REF } from '../constants.js';
import { quoteIdentifier } from '../util/string.js';
import { ExprNode } from './node.js';
/**
 * Check if a value is a column reference node.
 * @param value The value to check.
 */
export function isColumnRef(value) {
    return value instanceof ColumnRefNode;
}
export class ColumnRefNode extends ExprNode {
    /** The table reference. */
    table;
    /**
     * Instantiate a column reference node.
     * @param type The AST node type.
     * @param table The table reference.
     */
    constructor(type, table) {
        super(type);
        this.table = table;
    }
    /**
     * Returns the column name.
     */
    get column() {
        return ''; // subclasses to override
    }
    /**
     * Generate a SQL query string for this node.
     */
    toString() {
        const { column, table } = this;
        const tref = `${table ?? ''}`;
        const id = column === '*' ? '*' : quoteIdentifier(column);
        return (tref ? (tref + '.') : '') + id;
    }
}
export class ColumnNameRefNode extends ColumnRefNode {
    /** The column name. */
    name;
    /**
     * Instantiate a column reference node.
     * @param name The column name.
     * @param table The table reference.
     */
    constructor(name, table) {
        super(COLUMN_REF, table);
        this.name = name;
    }
    /**
     * Returns the column name.
     */
    get column() {
        return this.name;
    }
}
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