harmony 鸿蒙OH_Predicates

2023-10-30
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OH_Predicates

Overview

Defines the predicates used for RDB stores.

Since

Related Modules

RDB

Summary

Member Variables

Name	Description
id	Unique identifier of the OH_Predicates struct.
equalTo	Pointer to the function used to set a predicates object to match the field whose value is equal to the specified value.
notEqualTo	Pointer to the function used to set a predicates object to match the field whose value is not equal to the specified value.
beginWrap	Pointer to the function used to add a left parenthesis to the predicates.
endWrap	Pointer to the function used to add a right parenthesis to the predicates.
orOperate	Pointer to the function used to add the OR operator to the predicates.
andOperate	Pointer to the function used to add the AND operator to the predicates.
isNull	Pointer to the function used to set a predicates object to match the field whose value is null.
isNotNull	Pointer to the function used to set a predicates object to match the field whose value is not null.
like	Pointer to the function used to set a predicates object to match a string that is similar to the specified value.
between	Pointer to the function used to set a predicates object to match the field whose value is within the specified range.
notBetween	Pointer to the function used to set a predicates object to match the field whose value is out of the specified range.
greaterThan	Pointer to the function used to set a predicates object to match the field with value greater than the specified value.
lessThan	Pointer to the function used to set a predicates object to match the field with value less than the specified value.
greaterThanOrEqualTo	Pointer to the function used to set a predicates object to match the field with value greater than or equal to the specified value.
lessThanOrEqualTo	Pointer to the function used to set a predicates object to match the field with value less than or equal to the specified value.
orderBy	Pointer to the function used to set a predicates object to sort the values in a column in ascending or descending order.
distinct	Pointer to the function used to set a predicates object to filter out duplicate records.
limit	Pointer to the function used to set a predicates object to specify the maximum number of records.
offset	Pointer to the function used to set a predicates object to specify the start position of the returned result.
groupBy	Pointer to the function used to set a predicates object to group rows that have the same value into summary rows.
in	Pointer to the function used to set a predicates object to match the field with the value within the specified range.
notIn	Pointer to the function used to set a predicates object to match the field with the value out of the specified range.
clear	Pointer to the function used to clear a predicates instance.
destroy	Destroys an OH_Predicates object and reclaims the memory occupied.