wehub-resource-sync
91 lines
3.5 KiB
Go
91 lines
3.5 KiB
Go
// Copyright 2024 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 pgcatalog
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import (
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"io"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/server/tables"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// PgStatsName is a constant to the pg_stats name.
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const PgStatsName = "pg_stats"
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// InitPgStats handles registration of the pg_stats handler.
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func InitPgStats() {
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tables.AddHandler(PgCatalogName, PgStatsName, PgStatsHandler{})
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}
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// PgStatsHandler is the handler for the pg_stats table.
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type PgStatsHandler struct{}
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var _ tables.Handler = PgStatsHandler{}
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// Name implements the interface tables.Handler.
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func (p PgStatsHandler) Name() string {
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return PgStatsName
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}
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// RowIter implements the interface tables.Handler.
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func (p PgStatsHandler) RowIter(ctx *sql.Context, partition sql.Partition) (sql.RowIter, error) {
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// TODO: Implement pg_stats row iter
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return emptyRowIter()
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}
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// PkSchema implements the interface tables.Handler.
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func (p PgStatsHandler) PkSchema() sql.PrimaryKeySchema {
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return sql.PrimaryKeySchema{
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Schema: pgStatsSchema,
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PkOrdinals: nil,
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}
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}
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// pgStatsSchema is the schema for pg_stats.
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var pgStatsSchema = sql.Schema{
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{Name: "schemaname", Type: pgtypes.Name, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "tablename", Type: pgtypes.Name, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "attname", Type: pgtypes.Name, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "inherited", Type: pgtypes.Bool, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "null_frac", Type: pgtypes.Float32, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "avg_width", Type: pgtypes.Int32, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "n_distinct", Type: pgtypes.Float32, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "most_common_vals", Type: pgtypes.AnyArray, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "most_common_freqs", Type: pgtypes.Float32Array, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "histogram_bounds", Type: pgtypes.AnyArray, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "correlation", Type: pgtypes.Float32, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "most_common_elems", Type: pgtypes.AnyArray, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "most_common_elem_freqs", Type: pgtypes.Float32Array, Default: nil, Nullable: true, Source: PgStatsName},
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{Name: "elem_count_histogram", Type: pgtypes.Float32Array, Default: nil, Nullable: true, Source: PgStatsName},
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}
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// pgStatsRowIter is the sql.RowIter for the pg_stats table.
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type pgStatsRowIter struct {
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}
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var _ sql.RowIter = (*pgStatsRowIter)(nil)
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// Next implements the interface sql.RowIter.
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func (iter *pgStatsRowIter) Next(ctx *sql.Context) (sql.Row, error) {
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return nil, io.EOF
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}
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// Close implements the interface sql.RowIter.
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func (iter *pgStatsRowIter) Close(ctx *sql.Context) error {
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return nil
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}
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