ibatis 动态sql定义

Element

Description

<isEqual>

Checks the equality of a property and a value, or another property. Example Usage:

<isEqual prepend="AND"
             property="status"
             compareValue="Y">
MARRIED = ‘TRUE'
</isEqual>              

<isNotEqual>

Checks the inequality of a property and a value, or another property. Example Usage:

<isNotEqual prepend="AND"
             property="status"
             compareValue="N">
MARRIED = ‘FALSE'
</isNotEqual>  

<isGreaterThan>

Checks if a property is greater than a value or another property. Example Usage:

<isGreaterThan prepend="AND"
             property="age"
             compareValue="18">
ADOLESCENT = ‘FALSE'
</isGreaterThan>  

<isGreaterEqual>

Checks if a property is greater than or equal to a value or another property. Example Usage:

<isGreaterEqual prepend="AND"
             property="shoeSize"
             compareValue="12">
BIGFOOT = ‘TRUE'
</isGreaterEqual>

<isLessEqual>

Checks if a property is less than or equal to a value or another property. Example Usage:

<isLessEqual prepend="AND"
             property="age"
             compareValue="18">
ADOLESCENT = ‘TRUE'
</isLessEqual>

Element

Description

<isPropertyAvailable>

Checks if a property is available (i.e is a property of the parameter object). Example Usage:

<isPropertyAvailable property="id" >
  ACCOUNT_ID=#id#
</isPropertyAvailable>

<isNotPropertyAvailable>

Checks if a property is unavailable (i.e not a property of the parameter object). Example Usage:

<isNotPropertyAvailable property="age" >
  STATUS='New'
</isNotEmpty>

<isNull>

Checks if a property is null. Example Usage:

<isNull prepend="AND" property="order.id" >
  ACCOUNT.ACCOUNT_ID = ORDER.ACCOUNT_ID(+)
</isNotEmpty>

<isNotNull>

Checks if a property is not null. Example Usage:

<isNotNull prepend="AND" property="order.id" >
  ORDER.ORDER_ID = #order.id#
</isNotEmpty>

<isEmpty>

Checks to see if the value of a Collection, String property is null or empty ("" or size() < 1). Example Usage:

<isEmpty property="firstName" >
  LIMIT 0, 20
</isNotEmpty>

<isNotEmpty>

Checks to see if the value of a Collection, String property is not null and not empty ("" or size() < 1). Example Usage:

<isNotEmpty prepend="AND" property="firstName" >
  FIRST_NAME LIKE '%$FirstName$%'
</isNotEmpty>

Element

Description

<isParameterPresent>

Checks to see if the parameter object is present (not null).

<isParameterPresent prepend="AND">
  EMPLOYEE_TYPE = #empType#
</isParameterPresent>

<isNotParameterPresent>

Checks to see if the parameter object is not present (null). Example Usage:

<isNotParameterPresent prepend="AND">
  EMPLOYEE_TYPE = ‘DEFAULT'
</isNotParameterPresent>

Element

Description

<iterate>

Iterates over a property that is of type IList Example Usage:

<iterate prepend="AND" property="UserNameList"
  open="(" close=")" conjunction="OR">
  username=#UserNameList[]#
</iterate>

Note: It is very important to include the square brackets[] at the end of the List property name when using the Iterate element. These brackets distinguish this object as an List to keep the parser from simply outputting the List as a string.