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Add warning about SQL Injection vulnerability with different SQL_MODE #1830

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Add warning about SQL Injection vulnerability with different SQL_MODE #1830

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4 changes: 4 additions & 0 deletions Readme.md
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Expand Up @@ -676,6 +676,10 @@ connection.query('SELECT * FROM users WHERE id = ?', [userId], function (error,
});
```

**Caution** These methods of escaping values only work with the default [sql_mode setting](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html).
If [NO_BACKSLASH_ESCAPES](https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sqlmode_no_backslash_escapes) flag is enabled, strings will not
be properly escaped, and SQL Injection is still possible.

Multiple placeholders are mapped to values in the same order as passed. For example,
in the following query `foo` equals `a`, `bar` equals `b`, `baz` equals `c`, and
`id` will be `userId`:
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