Files
mql5-skills/skills/mql5/references/docs/30-database/1058-database-databasecolumnname.md
T
2026-06-23 21:47:51 +08:00

1.3 KiB
Raw Blame History

DatabaseColumnName

Gets a field name by index.

bool  DatabaseColumnName(
   int      request,     // request handle received in DatabasePrepare
   int      column,      // field index in the request
   string&  name         // the reference to the variable for receiving the field name
   );

Parameters

request

[in]  Request handle received in DatabasePrepare().

column

[in]  Field index in the request. Field numbering starts from zero and cannot exceed DatabaseColumnsCount() - 1.

name

[out]  Variable for writing the field name.

Return Value

Return true if successful, otherwise false. To get the error code, use GetLastError(), the possible responses are:

  • ERR_DATABASE_INVALID_HANDLE (5121) invalid request handle;
  • ERR_DATABASE_NO_MORE_DATA (5126)  – 'column' index exceeds DatabaseColumnsCount() -1.

Note

The value can be obtained only if at least one DatabaseRead() call has been preliminarily made for 'request'.

See also

DatabasePrepare, DatabaseColumnsCount, DatabaseColumnType