go type_error ai_generated true

sql: Scan error on column index 1: converting driver.Value type []uint8 to int64: invalid conversion

ID: go/database-sql-scan-type-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-09-14First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.22 active — — —

Root Cause

Scanning a database value into a Go variable of incompatible type, e.g., a string column into an integer.

generic

中文

将数据库值扫描到不兼容类型的 Go 变量中，例如将字符串列扫描为整数。

Workarounds

  1. 85% success 
    var id int64; if err := rows.Scan(&id); err != nil { /* handle type mismatch */ }; // or scan into sql.NullString and convert

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Fails at runtime if the value is not a string or []byte.

  2. 90% fail

    Leads to incorrect data handling and silent bugs.