Class

OracleSQLPreparedStatement

---

Description

Used to create a PreparedSQLStatement for an Oracle Database.

Methods

Name	Parameters	Returns	Shared
Bind	zeroBasedParam As Integer, value As Variant
BindType	zeroBasedIndex As Integer, type As Integer
ExecuteSQL	ParamArray bindValues() As Variant
SelectSQL	ParamArray bindValues() As Variant	RowSet

Method descriptions

---

OracleSQLPreparedStatement.Bind

Bind(zeroBasedParam As Integer, value As Variant)

Binds a value and its type for the prepared statement.

Use Database.Prepare to set up the bind.

This example creates a SQLite prepared statement to retrieve data from a Customers table. It then displays the data in a Listbox:

Var stmt As SQLitePreparedStatement

// note in a prepared statement you DO NOT put in the quotes
stmt = SQLitePreparedStatement(db.Prepare("SELECT * FROM Customers WHERE FirstName like ? "))

// have to tell sqlite what types the items being bound are so it does the right thing
stmt.BindType(0, SQLitePreparedStatement.SQLITE_TEXT)
stmt.Bind(0, TextField1.Text)

// perform the search
Var rs As RowSet = stmt.SQLSelect

ListBox1.RemoveAllRows
ListBox1.ColumnCount = rs.ColumnCount
ListBox1.HasHeader = True

Var hasHeadings As Boolean

While rs.AfterLastRow <> True
  ListBox1.AddRow("")

  For i As Integer = 0 To rs.ColumnCount-1
    If Not hasHeadings Then ListBox1.HeaderAt(i) = rs.ColumnAt(i+1).Name
    ListBox1.CellTextAt(ListBox1.LastAddedRowIndex, i) = rs.ColumnAt(i+1).StringValue
  Next

  rs.MoveToNextRow
  hasHeadings = True
Wend

---

OracleSQLPreparedStatement.BindType

BindType(zeroBasedIndex As Integer, type As Integer)

Specify types for multiple bind values. Each Database plug-in will have its own values.

---

OracleSQLPreparedStatement.ExecuteSQL

ExecuteSQL(ParamArray bindValues() As Variant)

Same as SelectSQL but does not return a result set. Executes and returns the result set of the prepared statement.

BindValues is optional and is intended for convenience only. If bindValues is not empty, ExecuteSQL will use the passed in values instead of the ones specified by calling Bind.

---

OracleSQLPreparedStatement.SelectSQL

SelectSQL(ParamArray bindValues() As Variant) As RowSet

Executes and returns the result set of the prepared statement.

The bindValues parameter is optional and is intended for convenience only. If bindValues is not empty SelectSQL will use the passed in values instead of the ones specified by calling Bind.

Interfaces

OracleSQLPreparedStatement implements the PreparedSQLStatement interface.

Notes

Note

The use of the prepared statement classes is rare because Database.SelectSQL and Database.ExecuteSQL utilize them automatically. See PreparedSQLStatement for information on cases where using prepared statement classes is appropriate.

Oracle prepared statements use the leading colons as markers in the prepared statement, i.e.:

SELECT * FROM Persons WHERE Name = :name

All parameters must have their type specified. These are the constants to use with the BindType method:

Constant
SQL_TYPE_CLOB
SQL_TYPE_DATE
SQL_TYPE_FLOAT
SQL_TYPE_INTEGER
SQL_TYPE_NULL
SQL_TYPE_STRING

Sample code

This code shows how to use database binding.

// "db" is an OracleDatabase object
Var ps As OracleSQLPreparedStatement
ps = OracleSQLPreparedStatement(db.Prepare("SELECT * FROM Persons WHERE Name = :name AND Age >= :age"))

ps.BindType(0, OracleSQLPreparedStatement.SQL_TYPE_STRING)
ps.BindType(1, OracleSQLPreparedStatement.SQL_TYPE_INTEGER)

ps.Bind(0, "John")
ps.Bind(1, 20)

Try
  Var rs As RecordSet = ps.SelectSQL
  // Use RecordSet as usual
Catch error As DatabaseException
  MessageBox(db.ErrorMessage)
  Return
End Try

Compatibility

All project types on all supported operating systems.

See also

Object parent class; Database, OracleDatabase, PreparedSQLStatement classes.