d32dbms.h File Reference

The maximum length for a DBMS name: 64 characters.

The maximum length for a DBMS column name: 64 characters.

Represents a writable DBMS name. It maps to a modifiable buffer descriptor with maximum size KDbMaxName.

Notes:

A DBMS name must begin with an alphabetic character, after which any alphabetic, numeric or the _ (underscore) character may be used. DBMS names are also limited to 64 characters in length.

Table names must be unique within a database, and columns and indexes must have unique names within the table to which they belong. For the purposes of uniqueness and identification, the names are folded before comparison, so two columns named column_one and Column_ONE are considered to have the same name.

See also: TBuf

Represents a non-writeable DBMS name. It maps to a non modifiable buffer descriptor with maximum size KDbMaxName.

Notes:

A DBMS name must begin with an alphabetic character, after which any alphabetic, numeric or the _ (underscore) character may be used. DBMS names are also limited to 64 characters in length.

Table names must be unique within a database, and columns and indexes must have unique names within the table to which they belong. For the purposes of uniqueness and identification, the names are folded before comparison, so two columns named column_one and Column_ONE are considered to have the same name.

See also: TBufC

Represents a writable DBMS column name. It maps to a modifiable buffer descriptor with maximum size KDbMaxColName.

Notes:

A DBMS name must begin with an alphabetic character, after which any alphabetic, numeric or the _ (underscore) character may be used. DBMS names are also limited to 64 characters in length.

Table names must be unique within a database, and columns and indexes must have unique names within the table to which they belong. For the purposes of uniqueness and identification, the names are folded before comparison, so two columns named column_one and Column_ONE are considered to have the same name.

Represents a non-writable DBMS column name. It maps to a non-modifiable buffer descriptor with maximum size KDbMaxColName.

Notes:

A DBMS name must begin with an alphabetic character, after which any alphabetic, numeric or the _ (underscore) character may be used. DBMS names are also limited to 64 characters in length.

Table names must be unique within a database, and columns and indexes must have unique names within the table to which they belong. For the purposes of uniqueness and identification, the names are folded before comparison, so two columns named column_one and Column_ONE are considered to have the same name.

See also: TBufC

Specifies when DBMS objects require a column ordinal to identify a column in a column set or in a rowset.

Note that KDbNullColNo is a special value of TDbColNo used to indicate that no such column exists.

Indicates that a specified column does not exist.

A value returned by RDbRowSet::Count() when the number of rows cannot be determined.

See also: RDbRowSet

The length of a column is undefined.

The default text column length. This is equal to 50.