go data_error ai_generated true

sql: Scan error on column index 1: converting driver.Value type []uint8 ("123") to a int64: invalid syntax

ID: go/sql-scan-type-mismatch

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-06-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
1.21 active — — —

Root Cause

Database returns a string representation of a number, but target is int; conversion fails.

generic

中文

数据库返回数字的字符串表示，但目标类型是 int，转换失败。

Workarounds

  1. 95% success 
    Scan into a string first, then parse: var s string; rows.Scan(&s); num, _ := strconv.Atoi(s)
  2. 90% success 
    Use sql.NullInt64 and handle invalid: var n sql.NullInt64; rows.Scan(&n); if n.Valid { use n.Int64 }

Dead Ends

Common approaches that don't work:

  1. 40% fail

    May not be possible or desirable; schema changes risky.

  2. 90% fail

    Data loss; incorrect results.