RowDescriptionParser

RowDescription (B) Byte1('T') Identifies the message as a row description.

Int32 Length of message contents in bytes, including self.

Int16 Specifies the number of fields in a row (can be zero).

Then, for each field, there is the following:

String The field name.

Int32 If the field can be identified as a column of a specific table, the object ID of the table; otherwise zero.

Int16 If the field can be identified as a column of a specific table, the attribute number of the column; otherwise zero.

Int32 The object ID of the field's data type.

Int16 The data type size (see pg_type.typlen). Note that negative values denote variable-width types.

Int32 The type modifier (see pg_attribute.atttypmod). The meaning of the modifier is type-specific.

Int16 The format code being used for the field. Currently will be zero (text) or one (binary). In a RowDescription returned from the statement variant of Describe, the format code is not yet known and will always be zero.