timescaledb/sql/pre_install/tables.sql

-- This file and its contents are licensed under the Apache License 2.0.
-- Please see the included NOTICE for copyright information and
-- LICENSE-APACHE for a copy of the license.

--NOTICE: UPGRADE-SCRIPT-NEEDED contents in this file are not auto-upgraded.

-- This file contains table definitions for various abstractions and data
-- structures for representing hypertables and lower-level concepts.

-- Hypertable
-- ==========
--
-- The hypertable is an abstraction that represents a table that is
-- partitioned in N dimensions, where each dimension maps to a column
-- in the table. A dimension can either be 'open' or 'closed', which
-- reflects the scheme that divides the dimension's keyspace into
-- "slices".
--
-- Conceptually, a partition -- called a "chunk", is a hypercube in
-- the N-dimensional space. A chunk stores a subset of the
-- hypertable's tuples on disk in its own distinct table. The slices
-- that span the chunk's hypercube each correspond to a constraint on
-- the chunk's table, enabling constraint exclusion during queries on
-- the hypertable's data.
--
--
-- Open dimensions
------------------
-- An open dimension does on-demand slicing, creating a new slice
-- based on a configurable interval whenever a tuple falls outside the
-- existing slices. Open dimensions fit well with columns that are
-- incrementally increasing, such as time-based ones.
--
-- Closed dimensions
--------------------
-- A closed dimension completely divides its keyspace into a
-- configurable number of slices. The number of slices can be
-- reconfigured, but the new partitioning only affects newly created
-- chunks.
--
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.hypertable (
    id                       SERIAL    PRIMARY KEY,
    schema_name              NAME      NOT NULL CHECK (schema_name != '_timescaledb_catalog'),
    table_name               NAME      NOT NULL,
    associated_schema_name   NAME      NOT NULL,
    associated_table_prefix  NAME      NOT NULL,
    num_dimensions           SMALLINT  NOT NULL,
    chunk_sizing_func_schema NAME      NOT NULL,
    chunk_sizing_func_name   NAME      NOT NULL,
    chunk_target_size        BIGINT    NOT NULL CHECK (chunk_target_size >= 0), -- size in bytes
    compressed               BOOLEAN   NOT NULL DEFAULT false,
    compressed_hypertable_id INTEGER   REFERENCES _timescaledb_catalog.hypertable(id),
    replication_factor       SMALLINT  NULL CHECK (replication_factor > 0),
    UNIQUE (id, schema_name),
    UNIQUE (schema_name, table_name),
    UNIQUE (associated_schema_name, associated_table_prefix),
    constraint hypertable_dim_compress_check check ( num_dimensions > 0  or compressed = true ),
   constraint hypertable_compress_check check ( compressed = false or (compressed = true and compressed_hypertable_id is null ))
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.hypertable', '');
SELECT pg_catalog.pg_extension_config_dump(pg_get_serial_sequence('_timescaledb_catalog.hypertable','id'), '');

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.hypertable_server (
    hypertable_id          INTEGER NOT NULL     REFERENCES _timescaledb_catalog.hypertable(id),
    server_hypertable_id   INTEGER NULL,
    server_name            NAME NOT NULL,
    UNIQUE (server_hypertable_id, server_name),
    UNIQUE (hypertable_id, server_name)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.hypertable_server', '');

-- The tablespace table maps tablespaces to hypertables.
-- This allows spreading a hypertable's chunks across multiple disks.
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.tablespace (
   id                SERIAL PRIMARY KEY,
   hypertable_id     INT  NOT NULL REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
   tablespace_name   NAME NOT NULL,
   UNIQUE (hypertable_id, tablespace_name)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.tablespace', '');

-- A dimension represents an axis along which data is partitioned.
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.dimension (
    id                          SERIAL   NOT NULL PRIMARY KEY,
    hypertable_id               INTEGER  NOT NULL REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    column_name                 NAME     NOT NULL,
    column_type                 REGTYPE  NOT NULL,
    aligned                     BOOLEAN  NOT NULL,
    -- closed dimensions
    num_slices                  SMALLINT NULL,
    partitioning_func_schema    NAME     NULL,
    partitioning_func           NAME     NULL,
    -- open dimensions (e.g., time)
    interval_length             BIGINT   NULL CHECK(interval_length IS NULL OR interval_length > 0),
    integer_now_func_schema     NAME     NULL,
    integer_now_func            NAME     NULL,
    CHECK (
        (partitioning_func_schema IS NULL AND partitioning_func IS NULL) OR
        (partitioning_func_schema IS NOT NULL AND partitioning_func IS NOT NULL)
    ),
    CHECK (
        (num_slices IS NULL AND interval_length IS NOT NULL) OR
        (num_slices IS NOT NULL AND interval_length IS NULL)
    ),
    CHECK (
        (integer_now_func_schema IS NULL AND integer_now_func IS NULL) OR
        (integer_now_func_schema IS NOT NULL AND integer_now_func IS NOT NULL)
    ),
    UNIQUE (hypertable_id, column_name)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.dimension', '');
SELECT pg_catalog.pg_extension_config_dump(pg_get_serial_sequence('_timescaledb_catalog.dimension','id'), '');

-- A dimension slice defines a keyspace range along a dimension axis.
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.dimension_slice (
    id            SERIAL   NOT NULL PRIMARY KEY,
    dimension_id  INTEGER  NOT NULL REFERENCES _timescaledb_catalog.dimension(id) ON DELETE CASCADE,
    range_start   BIGINT   NOT NULL,
    range_end     BIGINT   NOT NULL,
    CHECK (range_start <= range_end),
    UNIQUE (dimension_id, range_start, range_end)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.dimension_slice', '');
SELECT pg_catalog.pg_extension_config_dump(pg_get_serial_sequence('_timescaledb_catalog.dimension_slice','id'), '');

-- A chunk is a partition (hypercube) in an N-dimensional
-- hyperspace. Each chunk is associated with N constraints that define
-- the chunk's hypercube. Tuples that fall within the chunk's
-- hypercube are stored in the chunk's data table, as given by
-- 'schema_name' and 'table_name'.
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.chunk (
    id              SERIAL  NOT NULL    PRIMARY KEY,
    hypertable_id   INT     NOT NULL    REFERENCES _timescaledb_catalog.hypertable(id),
    schema_name     NAME    NOT NULL,
    table_name      NAME    NOT NULL,
    compressed_chunk_id   INTEGER  REFERENCES _timescaledb_catalog.chunk(id),
    dropped         BOOLEAN NOT NULL DEFAULT false,
    UNIQUE (schema_name, table_name)
);
CREATE INDEX IF NOT EXISTS chunk_hypertable_id_idx
ON _timescaledb_catalog.chunk(hypertable_id);
CREATE INDEX IF NOT EXISTS chunk_compressed_chunk_id_idx
ON _timescaledb_catalog.chunk(compressed_chunk_id);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.chunk', '');
SELECT pg_catalog.pg_extension_config_dump(pg_get_serial_sequence('_timescaledb_catalog.chunk','id'), '');

-- A chunk constraint maps a dimension slice to a chunk. Each
-- constraint associated with a chunk will also be a table constraint
-- on the chunk's data table.
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.chunk_constraint (
    chunk_id            INTEGER  NOT NULL REFERENCES _timescaledb_catalog.chunk(id),
    dimension_slice_id  INTEGER  NULL REFERENCES _timescaledb_catalog.dimension_slice(id),
    constraint_name     NAME NOT NULL,
    hypertable_constraint_name NAME NULL,
    UNIQUE(chunk_id, constraint_name)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.chunk_constraint', '');
CREATE INDEX IF NOT EXISTS chunk_constraint_chunk_id_dimension_slice_id_idx
ON _timescaledb_catalog.chunk_constraint(chunk_id, dimension_slice_id);

CREATE SEQUENCE IF NOT EXISTS _timescaledb_catalog.chunk_constraint_name;
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.chunk_constraint_name', '');

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.chunk_index (
    chunk_id              INTEGER NOT NULL REFERENCES _timescaledb_catalog.chunk(id) ON DELETE CASCADE,
    index_name            NAME NOT NULL,
    hypertable_id         INTEGER NOT NULL REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    hypertable_index_name NAME NOT NULL,
    UNIQUE(chunk_id, index_name)
);
CREATE INDEX IF NOT EXISTS chunk_index_hypertable_id_hypertable_index_name_idx
ON _timescaledb_catalog.chunk_index(hypertable_id, hypertable_index_name);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.chunk_index', '');

-- Default jobs are given the id space [1,1000). User-installed jobs and any jobs created inside tests
-- are given the id space [1000, INT_MAX). That way, we do not pg_dump jobs that are always default-installed
-- inside other .sql scripts. This avoids insertion conflicts during pg_restore.

CREATE SEQUENCE IF NOT EXISTS _timescaledb_config.bgw_job_id_seq MINVALUE 1000;
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_config.bgw_job_id_seq', '');

CREATE TABLE IF NOT EXISTS _timescaledb_config.bgw_job (
    id                  INTEGER PRIMARY KEY DEFAULT nextval('_timescaledb_config.bgw_job_id_seq'),
    application_name    NAME        NOT NULL,
    job_type            NAME        NOT NULL,
    schedule_interval   INTERVAL    NOT NULL,
    max_runtime         INTERVAL    NOT NULL,
    max_retries         INT         NOT NULL,
    retry_period        INTERVAL    NOT NULL,
    CONSTRAINT  valid_job_type CHECK (job_type IN ('telemetry_and_version_check_if_enabled', 'reorder', 'drop_chunks', 'continuous_aggregate', 'compress_chunks'))
);
ALTER SEQUENCE _timescaledb_config.bgw_job_id_seq OWNED BY _timescaledb_config.bgw_job.id;

SELECT pg_catalog.pg_extension_config_dump('_timescaledb_config.bgw_job', 'WHERE id >= 1000');

CREATE TABLE IF NOT EXISTS _timescaledb_internal.bgw_job_stat (
    job_id                  INTEGER         PRIMARY KEY REFERENCES _timescaledb_config.bgw_job(id) ON DELETE CASCADE,
    last_start              TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    last_finish             TIMESTAMPTZ NOT NULL,
    next_start              TIMESTAMPTZ NOT NULL,
    last_successful_finish  TIMESTAMPTZ NOT NULL,
    last_run_success        BOOL        NOT NULL,
    total_runs              BIGINT      NOT NULL,
    total_duration          INTERVAL    NOT NULL,
    total_successes         BIGINT      NOT NULL,
    total_failures          BIGINT      NOT NULL,
    total_crashes           BIGINT      NOT NULL,
    consecutive_failures    INT         NOT NULL,
    consecutive_crashes     INT         NOT NULL
);
--The job_stat table is not dumped by pg_dump on purpose because
--the statistics probably aren't very meaningful across instances.

--Now we define the argument tables for available BGW policies.
CREATE TABLE IF NOT EXISTS _timescaledb_config.bgw_policy_reorder (
    job_id                  INTEGER     PRIMARY KEY REFERENCES _timescaledb_config.bgw_job(id) ON DELETE CASCADE,
    hypertable_id           INTEGER     UNIQUE NOT NULL    REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    hypertable_index_name	NAME		NOT NULL
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_config.bgw_policy_reorder', '');

CREATE TABLE IF NOT EXISTS _timescaledb_config.bgw_policy_drop_chunks (
    job_id          		    INTEGER                 PRIMARY KEY REFERENCES _timescaledb_config.bgw_job(id) ON DELETE CASCADE,
    hypertable_id   		    INTEGER     UNIQUE      NOT NULL REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    older_than	    _timescaledb_catalog.ts_interval    NOT NULL,
	cascade					    BOOLEAN                 NOT NULL,
    cascade_to_materializations BOOLEAN,
    CONSTRAINT valid_older_than CHECK(_timescaledb_internal.valid_ts_interval(older_than))
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_config.bgw_policy_drop_chunks', '');

----- End BGW policy table definitions

-- Now we define a special stats table for each job/chunk pair. This will be used by the scheduler
-- to determine whether to run a specific job on a specific chunk.
CREATE TABLE IF NOT EXISTS _timescaledb_internal.bgw_policy_chunk_stats (
    job_id					INTEGER     NOT NULL REFERENCES _timescaledb_config.bgw_job(id) ON DELETE CASCADE,
    chunk_id				INTEGER		NOT NULL REFERENCES _timescaledb_catalog.chunk(id) ON DELETE CASCADE,
    num_times_job_run		INTEGER,
    last_time_job_run		TIMESTAMPTZ,
    UNIQUE(job_id,chunk_id)
);

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.metadata (
    key     NAME NOT NULL PRIMARY KEY,
    value   TEXT NOT NULL,
    include_in_telemetry BOOLEAN NOT NULL
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.metadata', $$WHERE key='exported_uuid'$$);

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.continuous_agg (
    mat_hypertable_id INTEGER PRIMARY KEY REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    raw_hypertable_id INTEGER NOT NULL REFERENCES  _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    user_view_schema NAME NOT NULL,
    user_view_name NAME NOT NULL,
    partial_view_schema NAME NOT NULL,
    partial_view_name NAME NOT NULL,
    bucket_width  BIGINT NOT NULL,
    job_id INTEGER UNIQUE NOT NULL REFERENCES _timescaledb_config.bgw_job(id) ON DELETE RESTRICT,
    refresh_lag BIGINT NOT NULL,
    direct_view_schema NAME NOT NULL,
    direct_view_name NAME NOT NULL,
    max_interval_per_job BIGINT NOT NULL,
    ignore_invalidation_older_than BIGINT NOT NULL DEFAULT BIGINT '9223372036854775807',
    materialized_only BOOL NOT NULL DEFAULT false,
    UNIQUE(user_view_schema, user_view_name),
    UNIQUE(partial_view_schema, partial_view_name)
);

CREATE INDEX IF NOT EXISTS continuous_agg_raw_hypertable_id_idx
    ON _timescaledb_catalog.continuous_agg(raw_hypertable_id);

SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.continuous_agg', '');

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.continuous_aggs_invalidation_threshold(
    hypertable_id INTEGER PRIMARY KEY REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    watermark BIGINT NOT NULL
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.continuous_aggs_invalidation_threshold', '');

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.continuous_aggs_completed_threshold(
    materialization_id INTEGER PRIMARY KEY
        REFERENCES _timescaledb_catalog.continuous_agg(mat_hypertable_id)
        ON DELETE CASCADE,
    watermark BIGINT NOT NULL --exclusive (everything up to but not including watermark is done)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.continuous_aggs_completed_threshold', '');

-- this does not have an FK on the materialization table since INSERTs to this
-- table are performance critical
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.continuous_aggs_hypertable_invalidation_log(
    hypertable_id INTEGER NOT NULL,
    modification_time BIGINT NOT NULL, --now time for txn when the raw table was modified
    lowest_modified_value BIGINT NOT NULL,
    greatest_modified_value BIGINT NOT NULL
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.continuous_aggs_hypertable_invalidation_log', '');

CREATE INDEX continuous_aggs_hypertable_invalidation_log_idx
    ON _timescaledb_catalog.continuous_aggs_hypertable_invalidation_log (hypertable_id, lowest_modified_value ASC);

-- per cagg copy of invalidation log
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.continuous_aggs_materialization_invalidation_log(
    materialization_id INTEGER
        REFERENCES _timescaledb_catalog.continuous_agg(mat_hypertable_id)
        ON DELETE CASCADE,
    modification_time BIGINT NOT NULL, --now time for txn when the raw table was modified
    lowest_modified_value BIGINT NOT NULL,
    greatest_modified_value BIGINT NOT NULL
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.continuous_aggs_materialization_invalidation_log', '');

CREATE INDEX continuous_aggs_materialization_invalidation_log_idx
    ON _timescaledb_catalog.continuous_aggs_materialization_invalidation_log (materialization_id, lowest_modified_value ASC);

/* the source of this data is the enum from the source code that lists
 *  the algorithms. This table is NOT dumped.
*/
CREATE TABLE IF NOT EXISTS _timescaledb_catalog.compression_algorithm(
	id SMALLINT PRIMARY KEY,
	version SMALLINT NOT NULL,
	name NAME NOT NULL,
	description TEXT
);


CREATE TABLE IF NOT EXISTS _timescaledb_catalog.hypertable_compression (
	hypertable_id INTEGER REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
	attname NAME NOT NULL,
	compression_algorithm_id SMALLINT REFERENCES _timescaledb_catalog.compression_algorithm(id),
	segmentby_column_index SMALLINT ,
	orderby_column_index SMALLINT,
	orderby_asc BOOLEAN,
	orderby_nullsfirst BOOLEAN,
	PRIMARY KEY (hypertable_id, attname),
    UNIQUE (hypertable_id, segmentby_column_index),
    UNIQUE (hypertable_id, orderby_column_index)
);

SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.hypertable_compression', '');

CREATE TABLE IF NOT EXISTS _timescaledb_catalog.compression_chunk_size (

    chunk_id            INTEGER REFERENCES _timescaledb_catalog.chunk(id) ON DELETE CASCADE,
    compressed_chunk_id   INTEGER REFERENCES _timescaledb_catalog.chunk(id) ON DELETE CASCADE,
    uncompressed_heap_size BIGINT NOT NULL,
    uncompressed_toast_size BIGINT NOT NULL,
    uncompressed_index_size BIGINT NOT NULL,
    compressed_heap_size BIGINT NOT NULL,
    compressed_toast_size BIGINT NOT NULL,
    compressed_index_size BIGINT NOT NULL,
    PRIMARY KEY(chunk_id, compressed_chunk_id)
);
SELECT pg_catalog.pg_extension_config_dump('_timescaledb_catalog.compression_chunk_size', '');

CREATE TABLE IF NOT EXISTS _timescaledb_config.bgw_policy_compress_chunks(
    job_id          		    INTEGER                 PRIMARY KEY REFERENCES _timescaledb_config.bgw_job(id) ON DELETE CASCADE,
    hypertable_id   		    INTEGER     UNIQUE      NOT NULL REFERENCES _timescaledb_catalog.hypertable(id) ON DELETE CASCADE,
    older_than	    _timescaledb_catalog.ts_interval    NOT NULL,
    CONSTRAINT valid_older_than CHECK(_timescaledb_internal.valid_ts_interval(older_than))
);

SELECT pg_catalog.pg_extension_config_dump('_timescaledb_config.bgw_policy_compress_chunks', '');


-- Set table permissions
-- We need to grant SELECT to PUBLIC for all tables even those not
-- marked as being dumped because pg_dump will try to access all
-- tables initially to detect inheritance chains and then decide
-- which objects actually need to be dumped.
GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_catalog TO PUBLIC;
GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_config TO PUBLIC;
GRANT SELECT ON ALL TABLES IN SCHEMA _timescaledb_internal TO PUBLIC;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA _timescaledb_catalog TO PUBLIC;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA _timescaledb_config TO PUBLIC;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA _timescaledb_internal TO PUBLIC;