Part 4: The Connect XE Drivers : The Greenplum Wire Protocol Driver : Connection Option Descriptions : Extended Column MetaData

Extended Column MetaData
Attribute
ExtendedColumnMetaData (ECMD)
Purpose
Determines how the driver returns column metadata when using SQLDescribeCol and SQLColAttribute.
Valid Values
0 | 1
Behavior
If set to 1 (Enabled), SQLDescribeCol returns the actual values for Data Type, Column Size, Decimal Digits, and Nullable. SQLColAttribute returns the actual values for:
If set to 0 (Disabled), SQLDescribeCol returns the Data Type, Column Size, and Decimal Digits for the column. The value SQL_NULLABLE_UNKNOWN is returned for Nullable. SQLColAttribute returns the following attribute values:
Default
0 (Disabled)
GUI Tab
Advanced tab

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