import * as arrow from 'apache-arrow';
export declare function getVectorLength(vector: arrow.Vector | null): number;
export declare function getVectorValue(vector: arrow.Vector | null, index: number): unknown;
export declare function getColumnVector(table: arrow.Table, columnName: string): arrow.Vector | null;
export declare function parseDataRecord(value: unknown): Record<string, unknown>;
export declare function coerceIdentifier(value: unknown): string | number;
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