mirror of
https://github.com/timescale/timescaledb.git
synced 2025-05-22 13:40:56 +08:00
bfe58b61f7
Clean up the table schema to get rid of legacy tables and functionality that makes it more difficult to provide an upgrade path. Notable changes: * Get rid of legacy tables and code * Simplify directory structure for SQL code * Simplify table hierarchy: remove root table and make chunk tables * inherit directly from main table * Change chunk table suffix from _data to _chunk * Simplify schema usage: _timescaledb_internal for internal functions. * _timescaledb_catalog for metadata tables. * Remove postgres_fdw dependency * Improve code comments in sql code
65 lines
2.4 KiB
SQL
65 lines
2.4 KiB
SQL
CREATE OR REPLACE FUNCTION _timescaledb_internal.first_sfunc(internal, anyelement, "any")
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RETURNS internal
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AS '$libdir/timescaledb', 'first_sfunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.first_combinefunc(internal, internal)
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RETURNS internal
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AS '$libdir/timescaledb', 'first_combinefunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.last_sfunc(internal, anyelement, "any")
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RETURNS internal
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AS '$libdir/timescaledb', 'last_sfunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.last_combinefunc(internal, internal)
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RETURNS internal
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AS '$libdir/timescaledb', 'last_combinefunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.bookend_finalfunc(internal, anyelement, "any")
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RETURNS anyelement
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AS '$libdir/timescaledb', 'bookend_finalfunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.bookend_serializefunc(internal)
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RETURNS bytea
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AS '$libdir/timescaledb', 'bookend_serializefunc'
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LANGUAGE C IMMUTABLE;
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CREATE OR REPLACE FUNCTION _timescaledb_internal.bookend_deserializefunc(bytea, internal)
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RETURNS internal
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AS '$libdir/timescaledb', 'bookend_deserializefunc'
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LANGUAGE C IMMUTABLE;
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--This aggregate returns the "first" element of the first argument when ordered by the second argument.
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--Ex. first(temp, time) returns the temp value for the row with the lowest time
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DROP AGGREGATE IF EXISTS first(anyelement, "any");
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CREATE AGGREGATE first(anyelement, "any") (
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SFUNC = _timescaledb_internal.first_sfunc,
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STYPE = internal,
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COMBINEFUNC = _timescaledb_internal.first_combinefunc,
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SERIALFUNC = _timescaledb_internal.bookend_serializefunc,
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DESERIALFUNC = _timescaledb_internal.bookend_deserializefunc,
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PARALLEL = SAFE,
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FINALFUNC = _timescaledb_internal.bookend_finalfunc,
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FINALFUNC_EXTRA
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);
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--This aggregate returns the "last" element of the first argument when ordered by the second argument.
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--Ex. last(temp, time) returns the temp value for the row with highest time
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DROP AGGREGATE IF EXISTS last(anyelement, "any");
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CREATE AGGREGATE last(anyelement, "any") (
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SFUNC = _timescaledb_internal.last_sfunc,
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STYPE = internal,
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COMBINEFUNC = _timescaledb_internal.last_combinefunc,
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SERIALFUNC = _timescaledb_internal.bookend_serializefunc,
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DESERIALFUNC = _timescaledb_internal.bookend_deserializefunc,
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PARALLEL = SAFE,
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FINALFUNC = _timescaledb_internal.bookend_finalfunc,
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FINALFUNC_EXTRA
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);
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