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Merge pull request vitessio#4385 from tinyspeck/vtctl-support-vschema…
…-ddls vtctl support for vschema ddls
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| /* | ||
| Copyright 2018 The Vitess Authors | ||
| 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 topotools | ||
|
|
||
| import ( | ||
| "reflect" | ||
|
|
||
| "vitess.io/vitess/go/vt/sqlparser" | ||
| "vitess.io/vitess/go/vt/vterrors" | ||
|
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||
| vschemapb "vitess.io/vitess/go/vt/proto/vschema" | ||
| vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc" | ||
| ) | ||
|
|
||
| // ApplyVSchemaDDL applies the given DDL statement to the vschema | ||
| // keyspace definition and returns the modified keyspace object. | ||
| func ApplyVSchemaDDL(ksName string, ks *vschemapb.Keyspace, ddl *sqlparser.DDL) (*vschemapb.Keyspace, error) { | ||
| if ks == nil { | ||
| ks = new(vschemapb.Keyspace) | ||
| } | ||
|
|
||
| if ks.Tables == nil { | ||
| ks.Tables = map[string]*vschemapb.Table{} | ||
| } | ||
|
|
||
| if ks.Vindexes == nil { | ||
| ks.Vindexes = map[string]*vschemapb.Vindex{} | ||
| } | ||
|
|
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| var tableName string | ||
| var table *vschemapb.Table | ||
| if !ddl.Table.IsEmpty() { | ||
| tableName = ddl.Table.Name.String() | ||
| table, _ = ks.Tables[tableName] | ||
| } | ||
|
|
||
| switch ddl.Action { | ||
| case sqlparser.CreateVindexStr: | ||
| name := ddl.VindexSpec.Name.String() | ||
| if _, ok := ks.Vindexes[name]; ok { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s already exists in keyspace %s", name, ksName) | ||
| } | ||
|
|
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| // Make sure the keyspace has the sharded bit set to true | ||
| // if this is the first vindex defined in the keyspace. | ||
| if len(ks.Vindexes) == 0 { | ||
| ks.Sharded = true | ||
| } | ||
|
|
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| owner, params := ddl.VindexSpec.ParseParams() | ||
| ks.Vindexes[name] = &vschemapb.Vindex{ | ||
| Type: ddl.VindexSpec.Type.String(), | ||
| Params: params, | ||
| Owner: owner, | ||
| } | ||
|
|
||
| return ks, nil | ||
|
|
||
| case sqlparser.AddColVindexStr: | ||
| // Support two cases: | ||
| // | ||
| // 1. The vindex type / params / owner are specified. If the | ||
| // named vindex doesn't exist, create it. If it does exist, | ||
| // require the parameters to match. | ||
| // | ||
| // 2. The vindex type is not specified. Make sure the vindex | ||
| // already exists. | ||
| spec := ddl.VindexSpec | ||
| name := spec.Name.String() | ||
| if !spec.Type.IsEmpty() { | ||
| owner, params := spec.ParseParams() | ||
| if vindex, ok := ks.Vindexes[name]; ok { | ||
| if vindex.Type != spec.Type.String() { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s defined with type %s not %s", name, vindex.Type, spec.Type.String()) | ||
| } | ||
| if vindex.Owner != owner { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s defined with owner %s not %s", name, vindex.Owner, owner) | ||
| } | ||
| if (len(vindex.Params) != 0 || len(params) != 0) && !reflect.DeepEqual(vindex.Params, params) { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s defined with different parameters", name) | ||
| } | ||
| } else { | ||
| // Make sure the keyspace has the sharded bit set to true | ||
| // if this is the first vindex defined in the keyspace. | ||
| if len(ks.Vindexes) == 0 { | ||
| ks.Sharded = true | ||
| } | ||
| ks.Vindexes[name] = &vschemapb.Vindex{ | ||
| Type: spec.Type.String(), | ||
| Params: params, | ||
| Owner: owner, | ||
| } | ||
| } | ||
| } else { | ||
| if _, ok := ks.Vindexes[name]; !ok { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s does not exist in keyspace %s", name, ksName) | ||
| } | ||
| } | ||
|
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||
| // If this is the first vindex being defined on the table, create | ||
| // the empty table record | ||
| if table == nil { | ||
| table = &vschemapb.Table{ | ||
| ColumnVindexes: make([]*vschemapb.ColumnVindex, 0, 4), | ||
| } | ||
| } | ||
|
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||
| // Make sure there isn't already a vindex with the same name on | ||
| // this table. | ||
| for _, vindex := range table.ColumnVindexes { | ||
| if vindex.Name == name { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s already defined on table %s", name, tableName) | ||
| } | ||
| } | ||
|
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| columns := make([]string, len(ddl.VindexCols), len(ddl.VindexCols)) | ||
| for i, col := range ddl.VindexCols { | ||
| columns[i] = col.String() | ||
| } | ||
| table.ColumnVindexes = append(table.ColumnVindexes, &vschemapb.ColumnVindex{ | ||
| Name: name, | ||
| Columns: columns, | ||
| }) | ||
| ks.Tables[tableName] = table | ||
|
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| return ks, nil | ||
|
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| case sqlparser.DropColVindexStr: | ||
| spec := ddl.VindexSpec | ||
| name := spec.Name.String() | ||
| if table == nil { | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "table %s.%s not defined in vschema", ksName, tableName) | ||
| } | ||
|
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| for i, colVindex := range table.ColumnVindexes { | ||
| if colVindex.Name == name { | ||
| table.ColumnVindexes = append(table.ColumnVindexes[:i], table.ColumnVindexes[i+1:]...) | ||
| if len(table.ColumnVindexes) == 0 { | ||
| delete(ks.Tables, tableName) | ||
| } | ||
| return ks, nil | ||
| } | ||
| } | ||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "vindex %s not defined in table %s.%s", name, ksName, tableName) | ||
| } | ||
|
|
||
| return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "unexpected vindex ddl operation %s", ddl.Action) | ||
| } |
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