dam_describeCol

This method is used to retrieve the description of the specified column. You must set up string buffers of at least DAM_MAX_ID_LEN+1 for the identifier names returned by this method. Pass in NULL for any attributes you do not want.

The attributes for controlling how the column is used in the query are returned as a bitwise OR (|) of the column attributes. You must implement the IP to perform a bitwise AND (&) of the output with the column type (DAM_COL_IN_COND) to check for all the ways the column is used.

Table 103: Parameters for dam_describeCol
Parameter	Type	Description
IN
hcol	int64	The column handle
OUT
piColNum	int	The column number as defined in the schema database.
pColName	StringBuilder	The column name. Create and pass in a StringBuilder of DAM_MAX_ID_LEN+1.
piXOType	int	The data type (see Table 33).
piColType	int	How the column appears in the query is specified by the setting of one or more of the following flags: DAM_COL_IN_SCHEMA – column is defined in the schema database. This flag applies to all columns. DAM_COL_IN_RESULT – column is part of the select list. DAM_COL_IN_CONDITION – column is part of the where clause. DAM_COL_IN_UPDATE_VAL_EXP – column is part of an update value expression.