wehub-resource-sync
95 lines
4.0 KiB
Go
95 lines
4.0 KiB
Go
// Copyright 2026 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 information_schema
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import (
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"strconv"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/information_schema"
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"github.com/dolthub/doltgresql/server/functions"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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const SequencesTableName = "sequences"
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// newSequencesTable returns a InformationSchemaTable for MySQL.
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func newSequencesTable() *information_schema.InformationSchemaTable {
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return &information_schema.InformationSchemaTable{
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TableName: SequencesTableName,
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TableSchema: sequencesSchema,
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Reader: sequencesRowIter,
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}
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}
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// tablesSchema is the schema for the information_schema.TABLES table.
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var sequencesSchema = sql.Schema{
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{Name: "sequence_catalog", Type: sql_identifier, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "sequence_schema", Type: sql_identifier, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "sequence_name", Type: sql_identifier, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "data_type", Type: character_data, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "numeric_precision", Type: cardinal_number, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "numeric_precision_radix", Type: cardinal_number, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "numeric_scale", Type: cardinal_number, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "start_value", Type: character_data, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "minimum_value", Type: character_data, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "maximum_value", Type: character_data, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "increment", Type: character_data, Default: nil, Nullable: true, Source: SequencesTableName},
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{Name: "cycle_option", Type: yes_or_no, Default: nil, Nullable: true, Source: SequencesTableName},
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}
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// sequencesRowIter implements the sql.RowIter for the information_schema.Sequences table.
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func sequencesRowIter(ctx *sql.Context, _ sql.Catalog) (sql.RowIter, error) {
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var rows []sql.Row
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err := functions.IterateCurrentDatabase(ctx, functions.Callbacks{
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Sequence: func(_ *sql.Context, schema functions.ItemSchema, sequence functions.ItemSequence) (cont bool, err error) {
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sequenceType := pgtypes.GetTypeByID(sequence.Item.DataTypeID)
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var precision, radix, scale interface{}
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if sequenceType != nil {
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precision, radix, scale = getColumnPrecisionAndScale(sequenceType)
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}
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cycleOption := "NO"
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if sequence.Item.Cycle {
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cycleOption = "YES"
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}
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rows = append(rows, sql.Row{
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schema.Item.Name(), //sequence_catalog
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schema.Item.SchemaName(), //sequence_schema
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sequence.Item.Id.SequenceName(), //sequence_name
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sequenceType.String(), //data_type
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precision, //numeric_precision
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radix, //numeric_precision_radix
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scale, //numeric_scale
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strconv.FormatInt(sequence.Item.Start, 10), //start_value
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strconv.FormatInt(sequence.Item.Minimum, 10), //minimum_value
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strconv.FormatInt(sequence.Item.Maximum, 10), //maximum_value
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strconv.FormatInt(sequence.Item.Increment, 10), //increment
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cycleOption, //cycle_option
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})
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return true, nil
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},
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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 sql.RowsToRowIter(rows...), nil
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}
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