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statement.go
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statement.go
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// Copyright 2013-2014 Aerospike, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package aerospike
// Query statement parameters.
type Statement struct {
// Query Namespace
Namespace string
// Query Set name (optional)
SetName string
// Optional query index name. If not set, the server
// will determine the index from the filter's bin name.
IndexName string
// bin names (optional)
BinNames []string
// Optional query filters.
// Currently, only one filter is allowed by the server on a secondary index lookup.
// If multiple filters are necessary, see QueryFilter example for a workaround.
// QueryFilter demonstrates how to add additional filters in an user-defined
// aggregation function.
Filters []*Filter
packageName string
functionName string
functionArgs []Value
// Set optional query task id.
TaskId int
// determines if the query should return data
returnData bool
}
func NewStatement(ns string, set string, binNames ...string) *Statement {
return &Statement{
Namespace: ns,
SetName: set,
BinNames: binNames,
returnData: true,
}
}
// Add a filter to the statement
func (stmt *Statement) Addfilter(filter *Filter) error {
stmt.Filters = append(stmt.Filters, filter)
return nil
}
// Set aggregation function parameters. This function will be called on both the server
// and client for each selected item.
func (stmt *Statement) SetAggregateFunction(packageName string, functionName string, functionArgs []Value, returnData bool) {
stmt.packageName = packageName
stmt.functionName = functionName
stmt.functionArgs = functionArgs
stmt.returnData = returnData
}
// Return if full namespace/set scan is specified.
func (stmt *Statement) IsScan() bool {
return stmt.Filters == nil
}