/**
 * Index Builder
 * Handles index generation, parsing, and SQL generation
 */
import type { IIndexDefinition } from '../../../types';
import type { IIndexInfo } from '../../../database/introspection';
export declare class IndexBuilder {
    /**
     * Convert introspection index data to index definition
     */
    convertToIndexDefinition(index: IIndexInfo): IIndexDefinition;
    /**
     * Generate SQL for an index
     */
    generateIndexSQL(index: IIndexDefinition, schema: string): string;
    /**
     * Extract column names from index definition
     */
    private extractColumnsFromIndexDef;
    /**
     * Extract the column list from index definition, handling nested parentheses
     */
    private extractColumnListFromIndexDef;
    /**
     * Parse index columns intelligently, handling both simple columns and complex expressions
     */
    private parseIndexColumns;
    /**
     * Extract WHERE clause from index definition
     */
    private extractWhereClause;
    /**
     * Check if the column is a complex expression (contains function calls, operators, etc.)
     */
    private isComplexExpression;
    /**
     * Escape identifier for SQL
     */
    private escapeIdentifier;
}
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