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cartodb-postgresql/scripts-available/CDB_CartodbfyTable.sql
Rafa de la Torre 0ebd12a0eb Avoid double-escaping of reloid::text #141
2015-09-15 18:49:59 +02:00

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PL/PgSQL
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-- Depends on:
-- * CDB_ExtensionUtils.sql
-- * CDB_TransformToWebmercator.sql
-- * CDB_TableMetadata.sql
-- * CDB_Quota.sql
-- * _CDB_UserQuotaInBytes() function, installed by rails
-- (user.rebuild_quota_trigger, called by rake task cartodb:db:update_test_quota_trigger)
-- 1) Required checks before running cartodbfication
-- Either will pass silenty or raise an exception
CREATE OR REPLACE FUNCTION _CDB_check_prerequisites(schema_name TEXT, reloid REGCLASS)
RETURNS void
AS $$
DECLARE
sql TEXT;
BEGIN
IF cartodb.schema_exists(schema_name) = false THEN
RAISE EXCEPTION 'Invalid schema name "%"', schema_name;
END IF;
-- TODO: Check that user quota is set ?
BEGIN
EXECUTE FORMAT('SELECT %I._CDB_UserQuotaInBytes();', schema_name::text) INTO sql;
EXCEPTION WHEN undefined_function THEN
RAISE EXCEPTION 'Please set user quota before cartodbfying tables.';
END;
END;
$$ LANGUAGE PLPGSQL;
-- Drop cartodb triggers (might prevent changing columns)
CREATE OR REPLACE FUNCTION _CDB_drop_triggers(reloid REGCLASS)
RETURNS void
AS $$
DECLARE
sql TEXT;
BEGIN
-- "track_updates"
sql := Format('DROP TRIGGER IF EXISTS track_updates ON %s', reloid::text);
EXECUTE sql;
-- "update_the_geom_webmercator"
sql := Format('DROP TRIGGER IF EXISTS update_the_geom_webmercator_trigger ON %s', reloid::text);
EXECUTE sql;
-- "test_quota" and "test_quota_per_row"
sql := Format('DROP TRIGGER IF EXISTS test_quota ON %s', reloid::text);
EXECUTE sql;
sql := Format('DROP TRIGGER IF EXISTS test_quota_per_row ON %s', reloid::text);
EXECUTE sql;
END;
$$ LANGUAGE PLPGSQL;
-- Cartodb_id creation & validation or renaming if invalid
CREATE OR REPLACE FUNCTION _CDB_create_cartodb_id_column(reloid REGCLASS)
RETURNS void
AS $$
DECLARE
sql TEXT;
rec RECORD;
rec2 RECORD;
had_column BOOLEAN;
i INTEGER;
new_name TEXT;
cartodb_id_name TEXT;
BEGIN
<< cartodb_id_setup >>
LOOP --{
had_column := FALSE;
BEGIN
sql := Format('ALTER TABLE %s ADD cartodb_id SERIAL NOT NULL UNIQUE', reloid::text);
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
cartodb_id_name := 'cartodb_id';
EXIT cartodb_id_setup;
EXCEPTION
WHEN duplicate_column THEN
RAISE NOTICE 'Column cartodb_id already exists';
had_column := TRUE;
WHEN others THEN
RAISE EXCEPTION 'Cartodbfying % (cartodb_id): % (%)', reloid, SQLERRM, SQLSTATE;
END;
IF had_column THEN
SELECT pg_catalog.pg_get_serial_sequence(reloid::text, 'cartodb_id')
AS seq INTO rec2;
-- Check data type is an integer
SELECT
pg_catalog.pg_get_serial_sequence(reloid::text, 'cartodb_id') as seq,
t.typname, t.oid, a.attnotnull FROM pg_type t, pg_attribute a
WHERE a.atttypid = t.oid AND a.attrelid = reloid AND NOT a.attisdropped AND a.attname = 'cartodb_id'
INTO STRICT rec;
-- 20=int2, 21=int4, 23=int8
IF rec.oid NOT IN (20,21,23) THEN -- {
RAISE NOTICE 'Existing cartodb_id field is of invalid type % (need int2, int4 or int8), renaming', rec.typname;
ELSIF rec.seq IS NULL THEN -- }{
RAISE NOTICE 'Existing cartodb_id field does not have an associated sequence, renaming';
ELSE -- }{
sql := Format('ALTER TABLE %s ALTER COLUMN cartodb_id SET NOT NULL', reloid::text);
IF NOT EXISTS ( SELECT c.conname FROM pg_constraint c, pg_attribute a
WHERE c.conkey = ARRAY[a.attnum] AND c.conrelid = reloid
AND a.attrelid = reloid
AND NOT a.attisdropped
AND a.attname = 'cartodb_id'
AND c.contype IN ( 'u', 'p' ) ) -- unique or pkey
THEN
sql := sql || ', ADD unique(cartodb_id)';
END IF;
BEGIN
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
cartodb_id_name := 'cartodb_id';
EXIT cartodb_id_setup;
EXCEPTION
WHEN unique_violation OR not_null_violation THEN
RAISE NOTICE '%, renaming', SQLERRM;
WHEN others THEN
RAISE EXCEPTION 'Cartodbfying % (cartodb_id): % (%)', reloid, SQLERRM, SQLSTATE;
END;
END IF; -- }
-- invalid column, need rename and re-create it
i := 0;
<< rename_column >>
LOOP --{
new_name := '_cartodb_id' || i;
BEGIN
sql := Format('ALTER TABLE %s RENAME COLUMN cartodb_id TO %I', reloid::text, new_name);
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
EXCEPTION
WHEN duplicate_column THEN
i := i+1;
CONTINUE rename_column;
WHEN others THEN
RAISE EXCEPTION 'Cartodbfying % (renaming cartodb_id): % (%)', reloid, SQLERRM, SQLSTATE;
END;
cartodb_id_name := new_name;
EXIT rename_column;
END LOOP; --}
CONTINUE cartodb_id_setup;
END IF;
END LOOP; -- }
-- Try to copy data from new name if possible
IF new_name IS NOT NULL THEN
RAISE NOTICE 'Trying to recover data from % column', new_name;
BEGIN
-- Copy existing values to new field
-- NOTE: using ALTER is a workaround to a PostgreSQL bug and is also known to be faster for tables with many rows
-- See http://www.postgresql.org/message-id/20140530143150.GA11051@localhost
sql := Format('ALTER TABLE %s ALTER cartodb_id TYPE int USING %I', reloid::text, new_name);
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
-- Find max value
sql := Format('SELECT max(cartodb_id) FROM %s', reloid::text);
RAISE DEBUG 'Running %', sql;
EXECUTE sql INTO rec;
-- Find sequence name
SELECT pg_catalog.pg_get_serial_sequence(reloid::text, 'cartodb_id')
AS seq INTO rec2;
-- Reset sequence name
sql := Format('ALTER SEQUENCE %s RESTART WITH %d', rec2.seq::text, rec.max + 1);
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
-- Drop old column (all went fine if we got here)
sql := Format('ALTER TABLE %s DROP %I', reloid::text, new_name);
RAISE DEBUG 'Running %', sql;
EXECUTE sql;
EXCEPTION
WHEN others THEN
RAISE NOTICE 'Could not initialize cartodb_id with existing values: % (%)',
SQLERRM, SQLSTATE;
END;
END IF;
-- Set primary key of the table if not already present (e.g. tables created from SQL API)
IF cartodb_id_name IS NULL THEN
RAISE EXCEPTION 'Cartodbfying % (Didnt get cartodb_id field name)', reloid;
END IF;
BEGIN
sql := Format('ALTER TABLE %s ADD PRIMARY KEY (cartodb_id)', reloid::text);
EXECUTE sql;
EXCEPTION
WHEN others THEN
RAISE DEBUG 'Table % Already had PRIMARY KEY', reloid;
END;
END;
$$ LANGUAGE PLPGSQL;
-- Create all triggers
-- NOTE: drop/create has the side-effect of re-enabling disabled triggers
CREATE OR REPLACE FUNCTION _CDB_create_triggers(schema_name TEXT, reloid REGCLASS)
RETURNS void
AS $$
DECLARE
sql TEXT;
BEGIN
-- "track_updates"
sql := 'CREATE trigger track_updates AFTER INSERT OR UPDATE OR DELETE OR TRUNCATE ON '
|| reloid::text
|| ' FOR EACH STATEMENT EXECUTE PROCEDURE public.cdb_tablemetadata_trigger()';
EXECUTE sql;
-- "update_the_geom_webmercator"
-- TODO: why _before_ and not after ?
sql := 'CREATE trigger update_the_geom_webmercator_trigger BEFORE INSERT OR UPDATE OF the_geom ON '
|| reloid::text
|| ' FOR EACH ROW EXECUTE PROCEDURE public._CDB_update_the_geom_webmercator()';
EXECUTE sql;
-- "test_quota" and "test_quota_per_row"
sql := 'CREATE TRIGGER test_quota BEFORE UPDATE OR INSERT ON '
|| reloid::text
|| ' EXECUTE PROCEDURE public.CDB_CheckQuota(0.1, ''-1'', '''
|| schema_name::text
|| ''')';
EXECUTE sql;
sql := 'CREATE TRIGGER test_quota_per_row BEFORE UPDATE OR INSERT ON '
|| reloid::text
|| ' FOR EACH ROW EXECUTE PROCEDURE public.CDB_CheckQuota(0.001, ''-1'', '''
|| schema_name::text
|| ''')';
EXECUTE sql;
END;
$$ LANGUAGE PLPGSQL;
-- 8.b) Create all raster triggers
-- NOTE: drop/create has the side-effect of re-enabling disabled triggers
CREATE OR REPLACE FUNCTION _CDB_create_raster_triggers(schema_name TEXT, reloid REGCLASS)
RETURNS void
AS $$
DECLARE
sql TEXT;
BEGIN
-- "track_updates"
sql := 'CREATE trigger track_updates AFTER INSERT OR UPDATE OR DELETE OR TRUNCATE ON '
|| reloid::text
|| ' FOR EACH STATEMENT EXECUTE PROCEDURE public.cdb_tablemetadata_trigger()';
EXECUTE sql;
-- "test_quota" and "test_quota_per_row"
sql := 'CREATE TRIGGER test_quota BEFORE UPDATE OR INSERT ON '
|| reloid::text
|| ' EXECUTE PROCEDURE public.CDB_CheckQuota(1, ''-1'', '''
|| schema_name::text
|| ''')';
EXECUTE sql;
sql := 'CREATE TRIGGER test_quota_per_row BEFORE UPDATE OR INSERT ON '
|| reloid::text
|| ' FOR EACH ROW EXECUTE PROCEDURE public.CDB_CheckQuota(0.001, ''-1'', '''
|| schema_name::text
|| ''')';
EXECUTE sql;
END;
$$ LANGUAGE PLPGSQL;
-- Update the_geom_webmercator
CREATE OR REPLACE FUNCTION _CDB_update_the_geom_webmercator()
RETURNS trigger
AS $$
BEGIN
NEW.the_geom_webmercator := public.CDB_TransformToWebmercator(NEW.the_geom);
RETURN NEW;
END;
$$ LANGUAGE plpgsql VOLATILE;
--- Trigger to update the updated_at column. No longer added by default
--- but kept here for compatibility with old tables which still have this behavior
--- and have it added
CREATE OR REPLACE FUNCTION _CDB_update_updated_at()
RETURNS TRIGGER AS $$
BEGIN
NEW.updated_at := now();
RETURN NEW;
END;
$$ LANGUAGE plpgsql VOLATILE;
-- Auxiliary function
CREATE OR REPLACE FUNCTION cartodb._CDB_is_raster_table(schema_name TEXT, reloid REGCLASS)
RETURNS BOOLEAN
AS $$
DECLARE
sql TEXT;
is_raster BOOLEAN;
rel_name TEXT;
BEGIN
IF cartodb.schema_exists(schema_name) = FALSE THEN
RAISE EXCEPTION 'Invalid schema name "%"', schema_name;
END IF;
SELECT relname FROM pg_class WHERE oid=reloid INTO rel_name;
BEGIN
sql := 'SELECT the_raster_webmercator FROM '
|| quote_ident(schema_name::TEXT)
|| '.'
|| quote_ident(rel_name::TEXT)
|| ' LIMIT 1';
is_raster = TRUE;
EXECUTE sql;
EXCEPTION WHEN undefined_column THEN
is_raster = FALSE;
END;
RETURN is_raster;
END;
$$ LANGUAGE PLPGSQL;
-- ////////////////////////////////////////////////////
-- Ensure a table is a "cartodb" table (See https://github.com/CartoDB/cartodb/wiki/CartoDB-user-table)
DROP FUNCTION IF EXISTS CDB_CartodbfyTable(reloid REGCLASS);
CREATE OR REPLACE FUNCTION CDB_CartodbfyTable(reloid REGCLASS)
RETURNS REGCLASS
AS $$
BEGIN
RETURN cartodb.CDB_CartodbfyTable('public', reloid);
END;
$$ LANGUAGE PLPGSQL;
-- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
--
-- NEW CARTODBFY CODE FROM HERE ON DOWN
--
-- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
--
-- CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS)
--
-- Main function, calls the following functions, with a little
-- logic before the table re-write to avoid re-writing if the table
-- already has all the necessary columns in place.
--
-- It returns the destoid of the table. If no rewritting is needed
-- the return value will be equal to reloid.
--
--
-- (0) _CDB_check_prerequisites
-- As before, this checks the prerequisites before trying to cartodbfy
--
-- (1) _CDB_drop_triggers
-- As before, this drops all the metadata and geom sync triggers
--
-- (2) _CDB_Has_Usable_Primary_ID()
-- Returns TRUE if it can find a unique integer primary key named
-- 'cartodb_id' or can rename an existing key.
-- Returns FALSE otherwise.
--
-- (3) _CDB_Has_Usable_Geom()
-- Looks for existing EPSG:4326 and EPSG:3857 geometry columns, and
-- renames them to the standard names if it can find them, returning TRUE.
-- If it cannot find both columns in the right EPSG, returns FALSE.
--
-- (4) _CDB_Rewrite_Table()
-- If table does not have a usable primary key and both usable geom
-- columns it needs to be re-written. Function constructs an appropriate
-- CREATE TABLE AS SELECT... query and executes it.
--
-- (5) _CDB_Add_Indexes()
-- Checks the primary key column for primary key constraint, adds it if
-- missing. Check geometry columns for GIST indexes and adds them if missing.
--
-- (6) _CDB_create_triggers()
-- Adds the system metadata and geometry column update triggers back
-- onto the table.
--
-- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
CREATE OR REPLACE FUNCTION _CDB_Columns(OUT pkey TEXT, OUT geomcol TEXT, OUT mercgeomcol TEXT)
RETURNS record
AS $$
BEGIN
pkey := 'cartodb_id';
geomcol := 'the_geom';
mercgeomcol := 'the_geom_webmercator';
END;
$$ LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION _CDB_Error(message TEXT, funcname TEXT DEFAULT '_CDB_Error')
RETURNS void
AS $$
BEGIN
RAISE EXCEPTION 'CDB(%): %', funcname, message;
END;
$$ LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION _CDB_SQL(sql TEXT, funcname TEXT DEFAULT '_CDB_SQL')
RETURNS void
AS $$
BEGIN
RAISE DEBUG 'CDB(%): %', funcname, sql;
EXECUTE sql;
EXCEPTION
WHEN others THEN
RAISE EXCEPTION 'CDB(%:%:%): %', funcname, SQLSTATE, SQLERRM, sql;
END;
$$ LANGUAGE 'plpgsql';
-- Find a unique relation name in the given schema, starting from the
-- template given. If the template is already unique, just return it;
-- otherwise, append an increasing integer until you find a unique variant.
CREATE OR REPLACE FUNCTION _CDB_Unique_Relation_Name(schemaname TEXT, relationname TEXT)
RETURNS TEXT
AS $$
DECLARE
rec RECORD;
i INTEGER;
newrelname TEXT;
BEGIN
i := 0;
newrelname := relationname;
LOOP
SELECT c.relname, n.nspname
INTO rec
FROM pg_class c
JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = newrelname
AND n.nspname = schemaname;
IF NOT FOUND THEN
RETURN newrelname;
END IF;
i := i + 1;
newrelname := relationname || '_' || i;
IF i > 100 THEN
PERFORM _CDB_Error('looping too far', '_CDB_Unique_Relation_Name');
END IF;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
-- Find a unique column name in the given relation, starting from the
-- column name given. If the column name is already unique, just return it;
-- otherwise, append an increasing integer until you find a unique variant.
CREATE OR REPLACE FUNCTION _CDB_Unique_Column_Name(reloid REGCLASS, columnname TEXT)
RETURNS TEXT
AS $$
DECLARE
rec RECORD;
i INTEGER;
newcolname TEXT;
BEGIN
i := 0;
newcolname := columnname;
LOOP
SELECT a.attname
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
WHERE NOT a.attisdropped
AND a.attnum > 0
AND c.oid = reloid
AND a.attname = newcolname;
IF NOT FOUND THEN
RETURN newcolname;
END IF;
i := i + 1;
newcolname := columnname || '_' || i;
IF i > 100 THEN
PERFORM _CDB_Error('looping too far', '_CDB_Unique_Column_Name');
END IF;
END LOOP;
END;
$$ LANGUAGE 'plpgsql';
-- Return the geometry SRID from the column metadata or
-- the geometry of the very first entry in a given column.
CREATE OR REPLACE FUNCTION _CDB_Geometry_SRID(reloid REGCLASS, columnname TEXT)
RETURNS INTEGER
AS $$
DECLARE
rec RECORD;
BEGIN
RAISE DEBUG 'CDB(%): %', '_CDB_Geometry_SRID', 'entered function';
EXECUTE Format('SELECT ST_SRID(%I) AS srid FROM %s LIMIT 1', columnname, reloid::text)
INTO rec;
IF rec IS NOT NULL THEN
RETURN rec.srid;
END IF;
RETURN 0;
END;
$$ LANGUAGE 'plpgsql';
-- Find out if the table already has a usable primary key
-- If the table has both a usable key and usable geometry
-- we can no-op on the table copy and just ensure that the
-- indexes and triggers are in place
CREATE OR REPLACE FUNCTION _CDB_Has_Usable_Primary_ID(reloid REGCLASS)
RETURNS BOOLEAN
AS $$
DECLARE
rec RECORD;
const RECORD;
i INTEGER;
sql TEXT;
useable_key BOOLEAN = false;
BEGIN
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', 'entered function';
-- Read in the names of the CartoDB columns
const := _CDB_Columns();
-- Do we already have a properly named column?
SELECT a.attname, i.indisprimary, i.indisunique, a.attnotnull, a.atttypid
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
WHERE c.oid = reloid
AND NOT a.attisdropped
AND a.attname = const.pkey;
-- Found something named right...
IF FOUND THEN
-- And it's an integer column...
IF rec.atttypid IN (20,21,23) THEN
-- And it's a unique primary key! Done!
IF rec.indisprimary AND rec.indisunique AND rec.attnotnull THEN
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', Format('found good ''%s''', const.pkey);
RETURN true;
-- Check and see if the column values are unique,
-- if they are, we can use this column...
ELSE
-- Assume things are OK until proven otherwise...
useable_key := true;
BEGIN
sql := Format('ALTER TABLE %s ADD CONSTRAINT %s_unique UNIQUE (%s)', reloid::text, const.pkey, const.pkey);
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', sql;
EXECUTE sql;
EXCEPTION
-- Failed unique check...
WHEN unique_violation THEN
RAISE NOTICE 'CDB(_CDB_Has_Usable_Primary_ID): %', Format('column %s is not unique', const.pkey);
useable_key := false;
-- Other fatal error
WHEN others THEN
PERFORM _CDB_Error(sql, '_CDB_Has_Usable_Primary_ID');
END;
-- Clean up test constraint
IF useable_key THEN
PERFORM _CDB_SQL(Format('ALTER TABLE %s DROP CONSTRAINT %s_unique', reloid::text, const.pkey));
-- Move non-unique column out of the way
ELSE
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %',
Format('found non-unique ''%s'', renaming it', const.pkey);
PERFORM _CDB_SQL(
Format('ALTER TABLE %s RENAME COLUMN %s TO %I',
reloid::text, rec.attname,
_CDB_Unique_Column_Name(reloid, const.pkey)),
'_CDB_Has_Usable_Primary_ID');
END IF;
return useable_key;
END IF;
-- It's not an integer column, we have to rename it
ELSE
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %',
Format('found non-integer ''%s'', renaming it', const.pkey);
PERFORM _CDB_SQL(
Format('ALTER TABLE %s RENAME COLUMN %s TO %I',
reloid::text, rec.attname, _CDB_Unique_Column_Name(reloid, const.pkey)),
'_CDB_Has_Usable_Primary_ID');
END IF;
-- There's no column there named pkey
ELSE
-- Is there another suitable primary key already?
SELECT a.attname
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
WHERE c.oid = reloid AND NOT a.attisdropped
AND i.indisprimary AND i.indisunique AND a.attnotnull AND a.atttypid IN (20,21,23);
-- Yes! Ok, rename it.
IF FOUND THEN
PERFORM _CDB_SQL(Format('ALTER TABLE %s RENAME COLUMN %s TO %s', reloid::text, rec.attname, const.pkey),'_CDB_Has_Usable_Primary_ID');
RETURN true;
ELSE
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %',
Format('found no useful column for ''%s''', const.pkey);
END IF;
END IF;
RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', 'function complete';
-- Didn't find re-usable key, so return FALSE
RETURN false;
END;
$$ LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION _CDB_Has_Usable_PK_Sequence(reloid REGCLASS)
RETURNS BOOLEAN
AS $$
DECLARE
seq TEXT;
const RECORD;
has_sequence BOOLEAN = false;
BEGIN
const := _CDB_Columns();
SELECT pg_get_serial_sequence(reloid::text, const.pkey)
INTO STRICT seq;
has_sequence := seq IS NOT NULL;
RETURN has_sequence;
END;
$$ LANGUAGE 'plpgsql';
-- Return a set of columns that can be candidates to be the_geom[webmercator]
-- with some extra information to analyze them.
CREATE OR REPLACE FUNCTION _cdb_geom_candidate_columns(reloid REGCLASS)
RETURNS TABLE (attname name, srid integer, typname name, desired_attname text, desired_srid integer)
AS $$
DECLARE
const RECORD;
BEGIN
const := _CDB_Columns();
RETURN QUERY
SELECT
a.attname,
CASE WHEN t.typname = 'geometry' THEN postgis_typmod_srid(a.atttypmod) ELSE NULL END AS srid,
t.typname,
f.desired_attname, f.desired_srid
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid,
(VALUES (const.geomcol, 4326), (const.mercgeomcol, 3857) ) as f(desired_attname, desired_srid)
WHERE c.oid = reloid
AND a.attnum > 0
AND NOT a.attisdropped
AND postgis_typmod_srid(a.atttypmod) IN (4326, 3857, 0)
ORDER BY t.oid ASC;
END;
$$ LANGUAGE 'plpgsql';
CREATE TYPE _cdb_has_usable_geom_record
AS (has_usable_geoms boolean,
text_geom_column boolean,
text_geom_column_name text,
text_geom_column_srid boolean,
has_geom boolean,
has_geom_name text,
has_mercgeom boolean,
has_mercgeom_name text);
CREATE OR REPLACE FUNCTION _CDB_Has_Usable_Geom(reloid REGCLASS)
RETURNS _cdb_has_usable_geom_record
AS $$
DECLARE
r1 RECORD;
r2 RECORD;
rv RECORD;
const RECORD;
has_geom BOOLEAN := false;
has_mercgeom BOOLEAN := false;
has_geom_name TEXT;
has_mercgeom_name TEXT;
-- In case 'the_geom' is a text column
text_geom_column BOOLEAN := false;
text_geom_column_name TEXT := '';
text_geom_column_srid BOOLEAN := true;
-- Utility variables
srid INTEGER;
str TEXT;
sql TEXT;
BEGIN
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', 'entered function';
-- Read in the names of the CartoDB columns
const := _CDB_Columns();
-- Do we have a column we can use?
FOR r1 IN
SELECT * FROM _cdb_geom_candidate_columns(reloid)
LOOP
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('checking column ''%s''', r1.attname);
-- Name collision: right name (the_geom, the_geomwebmercator?) but wrong type...
IF r1.typname != 'geometry' AND r1.attname = r1.desired_attname THEN
-- Maybe it's a geometry column hiding in a text column?
IF r1.typname IN ('text','varchar','char') THEN
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('column ''%s'' is a text column', r1.attname);
BEGIN
sql := Format('SELECT Max(ST_SRID(%I::geometry)) AS srid FROM %I', r1.attname, reloid::text);
EXECUTE sql INTO srid;
-- This gets skipped if EXCEPTION happens
-- Let the table writer know we need to convert from text
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('column ''%s'' can be cast from text to geometry', r1.attname);
text_geom_column := true;
text_geom_column_name := r1.attname;
-- Let the table writer know we need to force an SRID
IF srid = 0 THEN
text_geom_column_srid := false;
END IF;
-- Nope, the text in the column can't be converted into geometry
-- so rename it out of the way
EXCEPTION
WHEN others THEN
IF SQLERRM = 'parse error - invalid geometry' THEN
text_geom_column := false;
str := _CDB_Unique_Column_Name(reloid, r1.attname);
sql := Format('ALTER TABLE %s RENAME COLUMN %s TO %I', reloid::text, r1.attname, str);
PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %',
Format('Text column %s is not convertible to geometry, renamed to %s', r1.attname, str);
ELSE
RAISE EXCEPTION 'CDB(_CDB_Has_Usable_Geom) UNEXPECTED ERROR';
END IF;
END;
-- Just change its name so we can write a new column into that name.
ELSE
str := _CDB_Unique_Column_Name(reloid, r1.attname);
sql := Format('ALTER TABLE %s RENAME COLUMN %s TO %I', reloid::text, r1.attname, str);
PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %',
Format('%s is the wrong type, renamed to %s', r1.attname, str);
END IF;
-- Found a geometry column!
ELSIF r1.typname = 'geometry' THEN
-- If it's the right SRID, we can use it in place without
-- transforming it!
IF r1.srid = r1.desired_srid OR _CDB_Geometry_SRID(reloid, r1.attname) = r1.desired_srid THEN
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('found acceptable ''%s''', r1.attname);
IF r1.desired_attname = const.geomcol THEN
has_geom := true;
has_geom_name := r1.attname;
ELSIF r1.desired_attname = const.mercgeomcol THEN
has_mercgeom := true;
has_mercgeom_name := r1.attname;
END IF;
-- If it's an unknown SRID, we need to know that too
ELSIF r1.srid = 0 OR _CDB_Geometry_SRID(reloid, r1.attname) = 0 THEN
-- Unknown SRID, we'll have to fill it in later
text_geom_column_srid := true;
END IF;
END IF;
END LOOP;
SELECT
-- If table is perfect (no transforms required), return TRUE!
has_geom AND has_mercgeom AS has_usable_geoms,
-- If the geometry column is hiding in a text field, return enough info to deal w/ it.
text_geom_column, text_geom_column_name, text_geom_column_srid,
-- Return enough info to rename geom columns if needed
has_geom, has_geom_name, has_mercgeom, has_mercgeom_name
INTO rv;
RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('returning %s', rv);
RETURN rv;
END;
$$ LANGUAGE 'plpgsql';
-- Create a copy of the table. Assumes that the "Has usable" functions
-- have already been run, so that if there is a 'cartodb_id' column, it is
-- a "good" one, and the same for the geometry columns. If all the required
-- columns are in place already, it no-ops and just renames the table to
-- the destination if necessary.
CREATE OR REPLACE FUNCTION _CDB_Rewrite_Table(reloid REGCLASS, destschema TEXT DEFAULT NULL)
RETURNS BOOLEAN
AS $$
DECLARE
relname TEXT;
relschema TEXT;
destoid REGCLASS;
destname TEXT;
destseq TEXT;
destseqmax INTEGER;
salt TEXT := md5(random()::text || now());
copyname TEXT;
column_name_sql TEXT;
geom_transform_sql TEXT := NULL;
geom_column_source TEXT := '';
rec RECORD;
const RECORD;
gc RECORD;
sql TEXT;
str TEXT;
table_srid INTEGER;
geom_srid INTEGER;
has_usable_primary_key BOOLEAN;
has_usable_pk_sequence BOOLEAN;
BEGIN
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', 'entered function';
-- Read CartoDB standard column names in
const := _CDB_Columns();
-- Save the raw schema/table names for later
SELECT n.nspname, c.relname, c.relname
INTO STRICT relschema, relname, destname
FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE c.oid = reloid;
-- Default the destination to current schema if unspecified
IF destschema IS NULL THEN
destschema := relschema;
END IF;
-- See if there is a primary key column we need to carry along to the
-- new table. If this is true, it implies there is an indexed
-- primary key of integer type named (by default) cartodb_id
SELECT _CDB_Has_Usable_Primary_ID(reloid)
INTO STRICT has_usable_primary_key;
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): has_usable_primary_key %', has_usable_primary_key;
-- See if the candidate primary key column has a sequence for default
-- values. No usable pk implies has_usable_pk_sequence = false.
has_usable_pk_sequence := false;
IF has_usable_primary_key THEN
SELECT _CDB_Has_Usable_PK_Sequence(reloid)
INTO STRICT has_usable_pk_sequence;
END IF;
-- See if the geometry columns we need are already available
-- on the table. If they are, we don't need to do any bulk
-- transformation of the table, we can just ensure proper
-- indexes are in place and apply a rename
SELECT *
FROM _CDB_Has_Usable_Geom(reloid)
INTO STRICT gc;
-- If geom is the wrong name, just rename it.
IF gc.has_geom AND gc.has_geom_name != const.geomcol THEN
sql := Format('ALTER TABLE %s DROP COLUMN IF EXISTS %I', reloid::text, const.geomcol);
PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
sql := Format('ALTER TABLE %s RENAME COLUMN %I TO %I', reloid::text, gc.has_geom_name, const.geomcol);
PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
END IF;
-- If mercgeom is the wrong name, just rename it.
IF gc.has_mercgeom AND gc.has_mercgeom_name != const.mercgeomcol THEN
sql := Format('ALTER TABLE %s DROP COLUMN IF EXISTS %I', reloid::text, const.mercgeomcol);
PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
sql := Format('ALTER TABLE %s RENAME COLUMN %I TO %I', reloid::text, gc.has_mercgeom_name, const.mercgeomcol);
PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
END IF;
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): has_usable_geoms %', gc.has_usable_geoms;
-- We can only avoid a rewrite if both the key and
-- geometry are usable
-- No table re-write is required, BUT a rename is required to
-- a destination schema, so do that now
IF has_usable_primary_key AND has_usable_pk_sequence AND gc.has_usable_geoms THEN
IF destschema != relschema THEN
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): perfect table needs to be moved to schema (%)', destschema;
PERFORM _CDB_SQL(Format('ALTER TABLE %s SET SCHEMA %I', reloid::text, destschema), '_CDB_Rewrite_Table');
ELSE
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): perfect table in the perfect place';
END IF;
RETURN true;
END IF;
-- We must rewrite, so here we go...
-- Put the primary key sequence in the right schema
-- If the new table is not moving, better ensure the sequence name
-- is unique
destseq := relname || '_' || const.pkey || '_seq';
destseq := _CDB_Unique_Relation_Name(destschema, destseq);
destseq := Format('%I.%I', destschema, destseq);
PERFORM _CDB_SQL(Format('CREATE SEQUENCE %s', destseq), '_CDB_Rewrite_Table');
-- Salt a temporary table name if we are re-writing in place
-- Note copyname is already escaped and safe to use as identifier
IF destschema = relschema THEN
copyname := Format('%I.%I', destschema, Format('%s_%s', destname, salt));
ELSE
copyname := Format('%I.%I', destschema, destname);
END IF;
-- Start building the SQL!
sql := Format('CREATE TABLE %s AS SELECT ', copyname);
-- Add cartodb ID!
IF has_usable_primary_key THEN
sql := sql || const.pkey;
ELSE
sql := sql || 'nextval(''' || destseq || ''') AS ' || const.pkey;
END IF;
-- Add the geometry columns!
IF gc.has_usable_geoms THEN
sql := sql || ',' || const.geomcol || ',' || const.mercgeomcol;
ELSE
-- Arg, this "geometry" column is actually text!!
-- OK, we tested back in our geometry column research that it could
-- be safely cast to geometry, so let's do that.
IF gc.text_geom_column THEN
WITH t AS (
SELECT
a.attname,
CASE WHEN NOT gc.text_geom_column_srid THEN 'ST_SetSRID(' ELSE '' END AS missing_srid_start,
CASE WHEN NOT gc.text_geom_column_srid THEN ',4326)' ELSE '' END AS missing_srid_end
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
WHERE c.oid = reloid
AND t.typname IN ('text','varchar','char')
AND a.attnum > 0
AND a.attname = gc.text_geom_column_name
AND NOT a.attisdropped
ORDER BY a.attnum
LIMIT 1
)
SELECT ', ST_Transform('
|| t.missing_srid_start || t.attname || '::geometry' || t.missing_srid_end
|| ',4326)::Geometry(GEOMETRY,4326) AS '
|| const.geomcol
|| ', cartodb.CDB_TransformToWebmercator('
|| t.missing_srid_start || t.attname || '::geometry' || t.missing_srid_end
|| ')::Geometry(GEOMETRY,3857) AS '
|| const.mercgeomcol,
t.attname
INTO geom_transform_sql, geom_column_source
FROM t;
IF NOT FOUND THEN
-- We checked that this column existed already, it bloody well
-- better be found.
RAISE EXCEPTION 'CDB(_CDB_Rewrite_Table): Text column % is missing!', gc.text_geom_column_name;
ELSE
sql := sql || geom_transform_sql;
END IF;
-- There is at least one true geometry column in here, we'll
-- reproject that into the projections we need.
ELSE
-- Find the column we are going to be working with (the first
-- column with type "geometry")
SELECT a.attname
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
WHERE c.oid = reloid
AND t.typname = 'geometry'
AND a.attnum > 0
AND NOT a.attisdropped
ORDER BY a.attnum
LIMIT 1;
-- The SRID could be undeclared at the table level, but still
-- exist in the geometries themselves. We first find our geometry
-- column and read the first SRID off it it, if there is a row
-- to read.
IF FOUND THEN
EXECUTE Format('SELECT ST_SRID(%s) AS srid FROM %s LIMIT 1', rec.attname, reloid::text)
INTO geom_srid;
ELSE
geom_srid := 0;
END IF;
-- The geometry columns weren't in the right projection,
-- so we need to find the first decent geometry column
-- in the table and wrap it in two transforms, one to 4326
-- and another to 3857. Then remember its name so we can
-- ignore it when we build the list of other columns to
-- add to the output table
WITH t AS (
SELECT
a.attname,
postgis_typmod_type(a.atttypmod) AS geomtype,
CASE WHEN postgis_typmod_srid(a.atttypmod) = 0 AND srid.srid = 0 THEN 'ST_SetSRID(' ELSE '' END AS missing_srid_start,
CASE WHEN postgis_typmod_srid(a.atttypmod) = 0 AND srid.srid = 0 THEN ',4326)' ELSE '' END AS missing_srid_end
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid,
( SELECT geom_srid AS srid ) AS srid
WHERE c.oid = reloid
AND t.typname = 'geometry'
AND a.attnum > 0
AND NOT a.attisdropped
ORDER BY a.attnum
LIMIT 1
)
SELECT ', ST_Transform('
|| t.missing_srid_start || t.attname || t.missing_srid_end
|| ',4326)::Geometry(GEOMETRY,4326) AS '
|| const.geomcol
|| ', cartodb.CDB_TransformToWebmercator('
|| t.missing_srid_start || t.attname || t.missing_srid_end
|| ')::Geometry(GEOMETRY,3857) AS '
|| const.mercgeomcol,
t.attname
INTO geom_transform_sql, geom_column_source
FROM t;
IF NOT FOUND THEN
-- If there are no geometry columns, we continue making a
-- non-spatial table. This is important for folks who want
-- their tables to invalidate the SQL API
-- cache on update/insert/delete.
geom_column_source := '';
sql := sql || ',NULL::geometry(Geometry,4326) AS ' || const.geomcol;
sql := sql || ',NULL::geometry(Geometry,3857) AS ' || const.mercgeomcol;
ELSE
sql := sql || geom_transform_sql;
END IF;
END IF;
END IF;
-- Add now add all the rest of the columns
-- by selecting their names into an array and
-- joining the array with a comma
SELECT
',' || array_to_string(array_agg(a.attname),',') AS column_name_sql,
Count(*) AS count
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_type t ON a.atttypid = t.oid
WHERE c.oid = reloid
AND a.attnum > 0
AND a.attname NOT IN (const.geomcol, const.mercgeomcol, const.pkey, geom_column_source)
AND NOT a.attisdropped;
-- No non-cartodb columns? Possible, I guess.
IF rec.count = 0 THEN
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', 'found no extra columns';
column_name_sql := '';
ELSE
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', Format('found extra columns columns ''%s''', rec.column_name_sql);
column_name_sql := rec.column_name_sql;
END IF;
-- Add the source table to the SQL
sql := sql || column_name_sql || ' FROM ' || reloid::text;
RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', sql;
-- Run it!
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
-- Set up the primary key sequence
-- If we copied the primary key from the original data, we need
-- to set the sequence to the maximum value of that key
EXECUTE Format('SELECT max(%s) FROM %s',
const.pkey, copyname)
INTO destseqmax;
IF destseqmax IS NOT NULL THEN
PERFORM _CDB_SQL(Format('SELECT setval(''%s'', %s)', destseq, destseqmax), '_CDB_Rewrite_Table');
END IF;
-- Make the primary key use the sequence as its default value
sql := Format('ALTER TABLE %s ALTER COLUMN %s SET DEFAULT nextval(''%s'')',
copyname, const.pkey, destseq);
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
-- Make the sequence owned by the table, so when the table drops,
-- the sequence does too
sql := Format('ALTER SEQUENCE %s OWNED BY %s.%s', destseq, copyname, const.pkey);
PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
-- We just made a copy, so we can drop the original now
sql := Format('DROP TABLE %s', reloid::text);
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
-- If the table is being created by a SECURITY DEFINER function
-- make sure the user is set back to the user who is connected
IF current_user != session_user THEN
sql := Format('ALTER TABLE IF EXISTS %s OWNER TO %s', copyname, session_user);
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
sql := Format('ALTER SEQUENCE IF EXISTS %s OWNER TO %s', destseq, session_user);
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
END IF;
-- If we used a temporary destination table
-- we can now rename it into place
IF destschema = relschema THEN
sql := Format('ALTER TABLE %s RENAME TO %I', copyname, destname);
PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
END IF;
RETURN true;
END;
$$ LANGUAGE 'plpgsql';
-- Assumes the table already has the right metadata columns
-- (primary key and two geometry columns) and adds primary key
-- and geometry indexes if necessary.
CREATE OR REPLACE FUNCTION _CDB_Add_Indexes(reloid REGCLASS)
RETURNS BOOLEAN
AS $$
DECLARE
rec RECORD;
const RECORD;
iname TEXT;
sql TEXT;
relname TEXT;
BEGIN
RAISE DEBUG 'CDB(_CDB_Add_Indexes): %', 'entered function';
-- Read CartoDB standard column names in
const := _CDB_Columns();
-- Extract just the relname to use for the index names
SELECT c.relname
INTO STRICT relname
FROM pg_class c
WHERE c.oid = reloid;
-- Is there already a primary key on this table for
-- a column other than our chosen primary key?
SELECT ci.relname AS pkey
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
JOIN pg_class ci ON i.indexrelid = ci.oid
WHERE c.oid = reloid
AND NOT a.attisdropped
AND a.attname != const.pkey
AND i.indisprimary;
-- Yes? Then drop it, we're adding our own PK to the column
-- we prefer.
IF FOUND THEN
RAISE DEBUG 'CDB(_CDB_Add_Indexes): dropping unwanted primary key ''%''', rec.pkey;
sql := Format('ALTER TABLE %s DROP CONSTRAINT IF EXISTS %s', reloid::text, rec.pkey);
PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
END IF;
-- Is the default primary key flagged as primary?
SELECT a.attname
INTO rec
FROM pg_class c
JOIN pg_attribute a ON a.attrelid = c.oid
JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
JOIN pg_class ci ON ci.oid = i.indexrelid
WHERE attnum > 0
AND c.oid = reloid
AND a.attname = const.pkey
AND i.indisprimary
AND i.indisunique
AND NOT attisdropped;
-- No primary key? Add one.
IF NOT FOUND THEN
sql := Format('ALTER TABLE %s ADD PRIMARY KEY (%s)', reloid::text, const.pkey);
PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
END IF;
-- Add geometry indexes to all "special geometry columns" that
-- don't have one (either have no index at all, or have a non-GIST index)
FOR rec IN
SELECT a.attname, n.nspname
FROM pg_class c
JOIN pg_namespace n ON n.oid = c.relnamespace
JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0
LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
WHERE NOT attisdropped
AND a.attname IN (const.geomcol, const.mercgeomcol)
AND c.oid = reloid
AND i.indexrelid IS NULL
UNION
SELECT a.attname, n.nspname
FROM pg_class c
JOIN pg_namespace n ON n.oid = c.relnamespace
JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0
JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
JOIN pg_class ci ON ci.oid = i.indexrelid
JOIN pg_am am ON ci.relam = am.oid
WHERE NOT attisdropped
AND a.attname IN (const.geomcol, const.mercgeomcol)
AND c.oid = reloid
AND am.amname != 'gist'
LOOP
sql := Format('CREATE INDEX ON %s USING GIST (%s)', reloid::text, rec.attname);
PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
END LOOP;
RETURN true;
END;
$$ LANGUAGE 'plpgsql';
DROP FUNCTION IF EXISTS CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS);
CREATE OR REPLACE FUNCTION CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS)
RETURNS REGCLASS
AS $$
DECLARE
is_raster BOOLEAN;
relname TEXT;
relschema TEXT;
destoid REGCLASS;
destname TEXT;
rec RECORD;
BEGIN
-- Save the raw schema/table names for later
SELECT n.nspname, c.relname, c.relname
INTO STRICT relschema, relname, destname
FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE c.oid = reloid;
PERFORM cartodb._CDB_check_prerequisites(destschema, reloid);
-- Check destination schema exists
-- Throws an exception of there is no matching schema
IF destschema IS NOT NULL THEN
SELECT n.nspname
INTO rec FROM pg_namespace n WHERE n.nspname = destschema;
IF NOT FOUND THEN
RAISE EXCEPTION 'Schema ''%'' does not exist', destschema;
END IF;
ELSE
destschema := relschema;
END IF;
-- Drop triggers first
PERFORM _CDB_drop_triggers(reloid);
-- Rasters only get a cartodb_id and a limited selection of triggers
-- underlying assumption is that they are already formed up correctly
SELECT cartodb._CDB_is_raster_table(destschema, reloid) INTO is_raster;
IF is_raster THEN
PERFORM cartodb._CDB_create_cartodb_id_column(reloid);
PERFORM cartodb._CDB_create_raster_triggers(destschema, reloid);
ELSE
-- Rewrite (or rename) the table to the new location
PERFORM _CDB_Rewrite_Table(reloid, destschema);
-- The old regclass might not be valid anymore if we re-wrote the table...
destoid := (destschema || '.' || destname)::regclass;
-- Add indexes to the destination table, as necessary
PERFORM _CDB_Add_Indexes(destoid);
-- Add triggers to the destination table, as necessary
PERFORM _CDB_create_triggers(destschema, destoid);
END IF;
RETURN (destschema || '.' || destname)::regclass;
END;
$$ LANGUAGE 'plpgsql';
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