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InformixSQLExpression

Inherits from: EOSQLExpression : NSObject

Package: com.apple.yellow.informixeoadaptor

Class Description

InformixSQLExpression defines how to build SQL statements for InformixChannels.

Bind Variables

The InformixAdaptor uses bind variables. A bind variable is a placeholder used in an SQL statement that is replaced with an actual value after the database server determines an execution plan. You use the following methods to operate on bind variables:

bindVariableDictionaryForAttribute
mustUseBindVariableForAttribute
shouldUseBindVariableForAttribute

For more information on using bind variables, see the EOSQLExpression class specification.

Static Methods

serverTypeIdForName

public static int serverTypeIdForName(String typeName)

Returns the Informix type code (such as InfDecimal, InfDate, or InfCHAR) for typeName (such as "DECIMAL", "DATE", or "CHAR").

Instance Methods

lockClause

public String lockClause()

Overrides the EOSQLExpression method lockClause to return the SQL string used in a SELECT statement to lock selected rows, which is "FOR UPDATE OF".