wehub-resource-sync
132 lines
3.9 KiB
Go
132 lines
3.9 KiB
Go
// Copyright 2019 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package row
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import (
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"errors"
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"github.com/dolthub/dolt/go/libraries/doltcore/schema"
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"github.com/dolthub/dolt/go/store/types"
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)
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type keyedRow struct {
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key TaggedValues
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value TaggedValues
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}
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var _ Row = keyedRow{}
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func (nr keyedRow) IterSchema(sch schema.Schema, cb func(tag uint64, val types.Value) (stop bool, err error)) (bool, error) {
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err := sch.GetAllCols().Iter(func(tag uint64, col schema.Column) (bool, error) {
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value, _ := nr.GetColVal(tag)
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return cb(tag, value)
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})
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return false, err
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}
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func (nr keyedRow) GetColVal(tag uint64) (types.Value, bool) {
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val, ok := nr.key.Get(tag)
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if !ok {
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val, ok = nr.value.Get(tag)
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}
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return val, ok
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}
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func pkRowFromTaggedValues(nbf *types.NomsBinFormat, sch schema.Schema, colVals TaggedValues) (Row, error) {
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allCols := sch.GetAllCols()
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keyVals := make(TaggedValues)
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nonKeyVals := make(TaggedValues)
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_, err := colVals.Iter(func(tag uint64, val types.Value) (stop bool, err error) {
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col, ok := allCols.GetByTag(tag)
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if !ok {
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return false, errors.New("Trying to set a value on an unknown tag is a bug. Validation should happen upstream.")
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} else if col.IsPartOfPK {
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keyVals[tag] = val
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} else {
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nonKeyVals[tag] = val
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}
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return false, nil
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})
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if err != nil {
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return nil, err
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}
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return fromTaggedVals(nbf, sch, keyVals, nonKeyVals)
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}
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// fromTaggedVals will take a schema, a map of tag to value for the key, and a map of tag to value for non key values,
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// and generates a row. When a schema adds or removes columns from the non-key portion of the row, the schema will be
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// updated, but the rows will not be touched. So the non-key portion of the row may contain values that are not in the
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// schema (The keys must match the schema though).
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func fromTaggedVals(nbf *types.NomsBinFormat, sch schema.Schema, keyVals, nonKeyVals TaggedValues) (Row, error) {
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allCols := sch.GetAllCols()
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_, err := keyVals.Iter(func(tag uint64, val types.Value) (stop bool, err error) {
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col, ok := allCols.GetByTag(tag)
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if !ok {
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return false, errors.New("Trying to set a value on an unknown tag is a bug for the key. Validation should happen upstream. col:" + col.Name)
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} else if !col.IsPartOfPK {
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return false, errors.New("writing columns that are not part of the primary key to pk values. col:" + col.Name)
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} else if !types.IsNull(val) && col.Kind != val.Kind() {
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if col.Kind == types.GeometryKind && types.IsGeometryKind(val.Kind()) {
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return false, nil
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}
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return false, errors.New("bug. Setting a value to an incorrect kind. col: " + col.Name)
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}
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return false, nil
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})
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if err != nil {
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return nil, err
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}
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filteredVals := make(TaggedValues, len(nonKeyVals))
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_, err = nonKeyVals.Iter(func(tag uint64, val types.Value) (stop bool, err error) {
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col, ok := allCols.GetByTag(tag)
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if !ok {
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return false, nil
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}
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if col.IsPartOfPK {
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return false, errors.New("writing columns that are part of the primary key to non-pk values. col:" + col.Name)
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} else if !types.IsNull(val) && col.Kind != val.Kind() {
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if col.Kind == types.GeometryKind && types.IsGeometryKind(val.Kind()) {
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filteredVals[tag] = val
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return false, nil
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}
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return false, errors.New("bug. Setting a value to an incorrect kind. col:" + col.Name)
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} else {
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filteredVals[tag] = val
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}
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return false, nil
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})
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if err != nil {
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return nil, err
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}
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return keyedRow{key: keyVals, value: filteredVals}, nil
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}
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