| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You 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 column |
| |
| import ( |
| "context" |
| |
| "github.com/apache/spark-connect-go/v35/spark/sql/types" |
| |
| proto "github.com/apache/spark-connect-go/v35/internal/generated" |
| ) |
| |
| // Convertible is the interface for all things that can be converted into a protobuf expression. |
| type Convertible interface { |
| ToProto(ctx context.Context) (*proto.Expression, error) |
| } |
| |
| type Column struct { |
| expr expression |
| } |
| |
| func (c Column) ToProto(ctx context.Context) (*proto.Expression, error) { |
| return c.expr.ToProto(ctx) |
| } |
| |
| func (c Column) Lt(other Column) Column { |
| return NewColumn(NewUnresolvedFunction("<", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Le(other Column) Column { |
| return NewColumn(NewUnresolvedFunction("<=", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Gt(other Column) Column { |
| return NewColumn(NewUnresolvedFunction(">", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Ge(other Column) Column { |
| return NewColumn(NewUnresolvedFunction(">=", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Eq(other Column) Column { |
| return NewColumn(NewUnresolvedFunction("==", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Neq(other Column) Column { |
| cmp := NewUnresolvedFunction("==", []expression{c.expr, other.expr}, false) |
| return NewColumn(NewUnresolvedFunction("not", []expression{cmp}, false)) |
| } |
| |
| func (c Column) Mul(other Column) Column { |
| return NewColumn(NewUnresolvedFunction("*", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Div(other Column) Column { |
| return NewColumn(NewUnresolvedFunction("/", []expression{c.expr, other.expr}, false)) |
| } |
| |
| func (c Column) Desc() Column { |
| return NewColumn(&sortExpression{ |
| child: c.expr, |
| direction: proto.Expression_SortOrder_SORT_DIRECTION_DESCENDING, |
| nullOrdering: proto.Expression_SortOrder_SORT_NULLS_LAST, |
| }) |
| } |
| |
| func (c Column) Asc() Column { |
| return NewColumn(&sortExpression{ |
| child: c.expr, |
| direction: proto.Expression_SortOrder_SORT_DIRECTION_ASCENDING, |
| nullOrdering: proto.Expression_SortOrder_SORT_NULLS_FIRST, |
| }) |
| } |
| |
| func NewColumn(expr expression) Column { |
| return Column{ |
| expr: expr, |
| } |
| } |
| |
| type SchemaDataFrame interface { |
| PlanId() int64 |
| Schema(ctx context.Context) (*types.StructType, error) |
| } |
| |
| func OfDF(df SchemaDataFrame, colName string) Column { |
| return NewColumn(&delayedColumnReference{colName, df}) |
| } |