Created
January 19, 2022 19:29
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sql to json
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func (c Client) SelectJSON(query string) ([]byte, error) { | |
db, err := sql.Open(driver, c.DSN) | |
if err != nil { | |
return nil, err | |
} | |
defer db.Close() | |
rows, err := db.Query(query) | |
if err != nil { | |
return nil, err | |
} | |
defer rows.Close() | |
columns, err := rows.Columns() | |
if err != nil { | |
return nil, err | |
} | |
count := len(columns) | |
tableData := make([]map[string]interface{}, 0) | |
values := make([]interface{}, count) | |
valuePtrs := make([]interface{}, count) | |
for rows.Next() { | |
for i := 0; i < count; i++ { | |
valuePtrs[i] = &values[i] | |
} | |
rows.Scan(valuePtrs...) | |
entry := make(map[string]interface{}) | |
for i, col := range columns { | |
var v interface{} | |
val := values[i] | |
b, ok := val.([]byte) | |
if ok { | |
v = string(b) | |
} else { | |
v = val | |
} | |
entry[col] = v | |
} | |
tableData = append(tableData, entry) | |
} | |
jsonData, err := json.Marshal(tableData) | |
if err != nil { | |
return nil, err | |
} | |
return jsonData, nil | |
} |
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