@rolandohuber/mysql-mcp-server/dist/tools/summarizeTable.js

A comprehensive MCP server for MySQL database operations with 16 tools, multi-transport support, and intelligent test data generation

export const summarizeTableSchema = {
    name: 'mysql_summarizeTable',
    description: 'Generates a summary of a table including row count and column statistics',
    inputSchema: {
        type: 'object',
        properties: {
            table: {
                type: 'string',
                description: 'Name of the table to summarize',
            },
        },
        required: ['table'],
    },
};
export async function summarizeTableHandler(mysqlService, args) {
    try {
        // Get row count
        const countResult = await mysqlService.query(`SELECT COUNT(*) as count FROM \`${args.table}\``);
        const rowCount = countResult.rows[0].count;
        // Get table schema
        const schema = await mysqlService.describeTable(args.table);
        const columns = [];
        for (const column of schema) {
            const columnName = column.column_name;
            const columnType = column.data_type;
            // Get sample values (top 5 most common)
            const sampleQuery = `
        SELECT \`${columnName}\`, COUNT(*) as freq 
        FROM \`${args.table}\` 
        WHERE \`${columnName}\` IS NOT NULL 
        GROUP BY \`${columnName}\` 
        ORDER BY freq DESC 
        LIMIT 5
      `;
            const sampleResult = await mysqlService.query(sampleQuery);
            const sampleValues = sampleResult.rows.map(row => row[columnName]);
            // Get null count
            const nullQuery = `SELECT COUNT(*) as null_count FROM \`${args.table}\` WHERE \`${columnName}\` IS NULL`;
            const nullResult = await mysqlService.query(nullQuery);
            const nullCount = nullResult.rows[0].null_count;
            // Get unique count
            const uniqueQuery = `SELECT COUNT(DISTINCT \`${columnName}\`) as unique_count FROM \`${args.table}\``;
            const uniqueResult = await mysqlService.query(uniqueQuery);
            const uniqueCount = uniqueResult.rows[0].unique_count;
            columns.push({
                name: columnName,
                type: columnType,
                sampleValues,
                nullCount,
                uniqueCount,
            });
        }
        return {
            table: args.table,
            rowCount,
            columns,
        };
    }
    catch (error) {
        throw new Error(`Failed to summarize table ${args.table}: ${error}`);
    }
}
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