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ITableDefinition::DropColumn

  • Artigo

Drops a column from the base table.

Syntax

HRESULT DropColumn(
   DBID *pTableID,
   DBID *pColumnID);

Parameters

  • pTableID
    [in] A pointer to the DBID of the table from which to drop the column.

  • pColumnID
    [in] A pointer to the DBID of the column to drop.

Return Code

  • S_OK
    The method succeeded, and the column was dropped from the base table.

  • E_FAIL
    A provider-specific error occurred.

  • E_INVALIDARG
    pTableID or pColumnID was a null pointer.

  • DB_E_NOCOLUMN
    The column specified in *pColumnID does not exist in the specified table.

  • DB_E_DROPRESTRICTED
    The provider could not drop the column because pColumnID was referenced in a view definition.

    The provider could not drop the column because pColumnID was referenced in a constraint belonging to a table other than pTableID.

    The provider could not drop the column because pColumnID was referenced, along with one or more other columns, in a constraint definition on pTableID.

  • DB_E_NOTABLE
    The specified table does not exist in the current data store.

  • DB_E_TABLEINUSE
    The specified table was in use.

  • DB_SEC_E_PERMISSIONDENIED
    The consumer did not have sufficient permission to drop the column.

  • XACT_E_XTIONEXISTS
    The provider supports transactional DDL, the session is participating in a transaction, and the value of DBPROP_SUPPORTEDTXNDDL is DBPROPVAL_TC_DML.

Comments

If ITableDefinition::DropColumn returns any errors, the column is not dropped.

If the session is participating in a transaction, if DBPROP_SUPPORTEDTXNDDL is DBPROPVAL_TC_DDL_IGNORE, and if the method succeeds, the operation is complete and is unaffected by subsequent calls to abort or commit the transaction.

If the session is participating in a transaction, if DBPROP_SUPPORTEDTXNDDL is DBPROPVAL_TC_DDL_COMMIT, and if the method succeeds, the transaction is committed without retention. No new transaction is created. Any new work done on the session is outside the scope of a transaction. Attempting to explicitly commit or abort when there is no outstanding transaction returns an error.

See Also

Reference

ITableDefinition::AddColumn