Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | 881x 861x 859x 35492x 20x 8x 12x 12x 8x 4x 35500x 35500x 35500x 180813x 104406x 76407x 35500x 104450x 104285x 69319x 69319x 69303x 16x 8x 8x 24x 250x | /**
* MySQL database executor
* Works with mysql2 driver
*/
import type { SQL } from 'drizzle-orm'
import { sql } from 'drizzle-orm'
import type { DrizzleDatabase, ExplainOptions, ExplainResult, IndexInfo } from '../types'
import { BaseDatabaseExecutor } from './base-executor'
import { parseMySQLExplain } from '../explain/mysql-parser'
export class MySQLExecutor extends BaseDatabaseExecutor {
async execute<T = any[]>(query: SQL | any, numericFields?: string[]): Promise<T> {
// Handle Drizzle query objects directly
if (query && typeof query === 'object' && typeof query.execute === 'function') {
// This is a Drizzle query object, execute it directly
const result = await query.execute()
Eif (Array.isArray(result)) {
return result.map(row => this.convertNumericFields(row, numericFields)) as T
}
return result as T
}
if (!this.db.execute) {
throw new Error('MySQL database instance must have an execute method')
}
const result = await this.db.execute(query)
if (Array.isArray(result)) {
return result.map(row => this.convertNumericFields(row, numericFields)) as T
}
return result as T
}
/**
* Convert numeric string fields to numbers (measure fields + numeric dimensions)
*/
private convertNumericFields(row: any, numericFields?: string[]): any {
Iif (!row || typeof row !== 'object') return row
const converted: any = {}
for (const [key, value] of Object.entries(row)) {
// Only convert specified numeric fields (measures + numeric dimensions)
// Other dimensions and time dimensions keep their original types
if (numericFields && numericFields.includes(key)) {
converted[key] = this.coerceToNumber(value)
} else {
converted[key] = value
}
}
return converted
}
/**
* Coerce a value to a number if it represents a numeric type
*/
private coerceToNumber(value: any): any {
// Handle null/undefined - preserve null values for aggregations
if (value == null) return value
// Already a number
if (typeof value === 'number') return value
// Handle string representations of numbers
Eif (typeof value === 'string') {
// Check for exact numeric strings
if (/^-?\d+(\.\d+)?$/.test(value)) {
return value.includes('.') ? parseFloat(value) : parseInt(value, 10)
}
// Check for other numeric formats (scientific notation, etc.)
if (!isNaN(parseFloat(value)) && isFinite(parseFloat(value))) {
return parseFloat(value)
}
}
// Return as-is for non-numeric values
return value
}
getEngineType(): 'mysql' | 'singlestore' {
return 'mysql'
}
/**
* Execute EXPLAIN on a SQL query to get the execution plan
*/
async explainQuery(
sqlString: string,
params: unknown[],
options?: ExplainOptions
): Promise<ExplainResult> {
// MySQL uses ? placeholders, replace with values
let queryWithValues = sqlString
let paramIndex = 0
queryWithValues = queryWithValues.replace(/\?/g, () => {
const value = params[paramIndex++]
if (value === null) return 'NULL'
if (typeof value === 'number') return String(value)
if (typeof value === 'boolean') return value ? '1' : '0'
if (value instanceof Date) return `'${value.toISOString().slice(0, 19).replace('T', ' ')}'`
// String: escape single quotes
return `'${String(value).replace(/'/g, "''")}'`
})
// Build EXPLAIN command
// Note: EXPLAIN ANALYZE is only available in MySQL 8.0.18+
const explainPrefix = options?.analyze ? 'EXPLAIN ANALYZE' : 'EXPLAIN'
if (!this.db.execute) {
throw new Error('MySQL database instance must have an execute method')
}
// Execute EXPLAIN
const result = await this.db.execute(
sql.raw(`${explainPrefix} ${queryWithValues}`)
)
// MySQL returns EXPLAIN output as rows with specific columns
// Standard columns: id, select_type, table, partitions, type, possible_keys, key, key_len, ref, rows, filtered, Extra
const rows: any[] = []
if (Array.isArray(result)) {
for (const row of result) {
if (row && typeof row === 'object') {
rows.push({
id: (row as Record<string, unknown>).id || 1,
select_type: (row as Record<string, unknown>).select_type || 'SIMPLE',
table: (row as Record<string, unknown>).table || null,
partitions: (row as Record<string, unknown>).partitions || null,
type: (row as Record<string, unknown>).type || 'ALL',
possible_keys: (row as Record<string, unknown>).possible_keys || null,
key: (row as Record<string, unknown>).key || null,
key_len: (row as Record<string, unknown>).key_len || null,
ref: (row as Record<string, unknown>).ref || null,
rows: Number((row as Record<string, unknown>).rows) || 0,
filtered: Number((row as Record<string, unknown>).filtered) || 100,
Extra: (row as Record<string, unknown>).Extra || null,
})
}
}
}
// Parse the output using the MySQL parser
return parseMySQLExplain(rows, { sql: sqlString, params })
}
/**
* Get existing indexes for the specified tables
*/
async getTableIndexes(tableNames: string[]): Promise<IndexInfo[]> {
if (!tableNames || tableNames.length === 0) {
return []
}
if (!this.db.execute) {
throw new Error('MySQL database instance must have an execute method')
}
try {
// Build table list for SQL IN clause
const tableList = tableNames.map(t => `'${t.toLowerCase()}'`).join(',')
const result = await this.db.execute(sql`
SELECT
TABLE_NAME as table_name,
INDEX_NAME as index_name,
GROUP_CONCAT(COLUMN_NAME ORDER BY SEQ_IN_INDEX) as columns,
CASE WHEN NON_UNIQUE = 0 THEN TRUE ELSE FALSE END as is_unique,
CASE WHEN INDEX_NAME = 'PRIMARY' THEN TRUE ELSE FALSE END as is_primary
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA = DATABASE()
AND LOWER(TABLE_NAME) IN (${sql.raw(tableList)})
GROUP BY TABLE_NAME, INDEX_NAME, NON_UNIQUE
ORDER BY TABLE_NAME, INDEX_NAME
`)
if (!Array.isArray(result)) {
return []
}
return result.map((row: any) => ({
table_name: row.table_name,
index_name: row.index_name,
columns: row.columns.split(','),
is_unique: Boolean(row.is_unique),
is_primary: Boolean(row.is_primary)
}))
} catch (err) {
console.warn('Failed to get table indexes:', err)
return []
}
}
}
/**
* Factory function for creating MySQL executors
*/
export function createMySQLExecutor(
db: DrizzleDatabase,
schema?: any
): MySQLExecutor {
return new MySQLExecutor(db, schema, 'mysql')
} |