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Merge pull request #55037 from rschu1ze/inf_sch_tables

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Implement information_schema.tables.data_length
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Robert Schulze 2023-09-27 14:09:38 +02:00 committed by GitHub
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5 changed files with 69 additions and 50 deletions
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8
docs/en/operations/system-tables/information_schema.md
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@ -198,8 +198,10 @@ Columns:
- `FOREIGN TABLE`
- `LOCAL TEMPORARY`
- `SYSTEM VIEW`
- `data_length` ([Nullable](../../sql-reference/data-types/nullable.md)([UInt64](../../sql-reference/data-types/int-uint.md))) — The size of
the data on-disk. NULL if it could not be determined.
- `table_collation` ([Nullable](../../sql-reference/data-types/nullable.md)([String](../../sql-reference/data-types/string.md))) — The table default collation. Always `utf8mb4_0900_ai_ci`.
- `table_comment` ([Nullable](../../sql-reference/data-types/nullable.md)([String](../../sql-reference/data-types/string.md))) — The comment used when creating the table.
- `table_collation` ([Nullable](../../sql-reference/data-types/nullable.md)([String](../../sql-reference/data-types/string.md))) — The table default collation. Always `utf8mb4`.
**Example**
@ -291,7 +293,7 @@ is_trigger_deletable: NO
is_trigger_insertable_into: NO
```
## KEY_COLUMN_USAGE (#key_column_usage)
## KEY_COLUMN_USAGE {#key_column_usage}
Contains columns from the [system.tables](../../operations/system-tables/tables.md) system table which are restricted by constraints.
@ -350,7 +352,7 @@ referenced_table_name: ᴺᵁᴸᴸ
referenced_column_name: ᴺᵁᴸᴸ
```
## REFERENTIAL_CONSTRAINTS (#referential_constraints)
## REFERENTIAL_CONSTRAINTS {#referential_constraints}
Contains information about foreign keys. Currently returns an empty result (no rows) which is just enough to provide compatibility with 3rd party tools like Tableau Online.

4
src/Storages/System/attachInformationSchemaTables.cpp
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@ -61,12 +61,14 @@ static constexpr std::string_view tables = R"(
`table_schema` String,
`table_name` String,
`table_type` String,
`data_length` Nullable(UInt64),
`table_collation` Nullable(String),
`table_comment` Nullable(String),
`TABLE_CATALOG` String,
`TABLE_SCHEMA` String,
`TABLE_NAME` String,
`TABLE_TYPE` String,
`DATA_LENGTH` Nullable(UInt64),
`TABLE_COLLATION` Nullable(String),
`TABLE_COMMENT` Nullable(String)
) AS
@ -80,12 +82,14 @@ static constexpr std::string_view tables = R"(
has_own_data = 0, 'FOREIGN TABLE',
'BASE TABLE'
) AS table_type,
total_bytes AS data_length,
'utf8mb4_0900_ai_ci' AS table_collation,
comment AS table_comment,
table_catalog AS TABLE_CATALOG,
table_schema AS TABLE_SCHEMA,
table_name AS TABLE_NAME,
table_type AS TABLE_TYPE,
data_length AS DATA_LENGTH,
table_collation AS TABLE_COLLATION,
table_comment AS TABLE_COMMENT
FROM system.tables

42
tests/queries/0_stateless/01161_information_schema.reference
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@ -22,34 +22,36 @@ referential_constraints
schemata
tables
views
-- information_schema.schemata
INFORMATION_SCHEMA INFORMATION_SCHEMA default \N \N \N \N INFORMATION_SCHEMA INFORMATION_SCHEMA default \N \N \N \N
information_schema information_schema default \N \N \N \N information_schema information_schema default \N \N \N \N
default default kcu BASE TABLE utf8mb4_0900_ai_ci default default kcu BASE TABLE utf8mb4_0900_ai_ci
default default kcu2 BASE TABLE utf8mb4_0900_ai_ci default default kcu2 BASE TABLE utf8mb4_0900_ai_ci
default default mv VIEW utf8mb4_0900_ai_ci default default mv VIEW utf8mb4_0900_ai_ci
default default t FOREIGN TABLE utf8mb4_0900_ai_ci default default t FOREIGN TABLE utf8mb4_0900_ai_ci
default default v VIEW utf8mb4_0900_ai_ci default default v VIEW utf8mb4_0900_ai_ci
tmp LOCAL TEMPORARY utf8mb4_0900_ai_ci tmp LOCAL TEMPORARY utf8mb4_0900_ai_ci
-- information_schema.tables
default default kcu1 BASE TABLE 0 utf8mb4_0900_ai_ci default default kcu1 BASE TABLE 0 utf8mb4_0900_ai_ci
default default kcu2 BASE TABLE 0 utf8mb4_0900_ai_ci default default kcu2 BASE TABLE 0 utf8mb4_0900_ai_ci
default default mv VIEW 0 utf8mb4_0900_ai_ci default default mv VIEW 0 utf8mb4_0900_ai_ci
default default t FOREIGN TABLE 0 utf8mb4_0900_ai_ci default default t FOREIGN TABLE 0 utf8mb4_0900_ai_ci
default default v VIEW \N utf8mb4_0900_ai_ci default default v VIEW \N utf8mb4_0900_ai_ci
-- information_schema.views
default default mv SELECT * FROM system.one NONE NO YES NO NO NO default default mv SELECT * FROM system.one NONE NO YES NO NO NO
default default v SELECT n, f FROM default.t NONE NO NO NO NO NO default default v SELECT n, f FROM default.t NONE NO NO NO NO NO
default default kcu i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32 default default kcu i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32
default default kcu s 2 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String default default kcu s 2 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String
default default kcu2 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32 default default kcu2 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32
-- information_schema.columns
default default kcu1 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32 default default kcu1 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32
default default kcu1 s 2 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String default default kcu1 s 2 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String
default default kcu2 d 2 0 Date \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N Date default default kcu2 d 2 0 Date \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N Date
default default kcu2 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32 default default kcu2 i 1 0 UInt32 \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N UInt32
default default kcu2 u 3 0 UUID \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N UUID default default kcu2 u 3 0 UUID \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N UUID
default default mv dummy 1 0 UInt8 \N \N 8 2 0 \N \N \N \N \N \N \N \N \N \N UInt8 default default mv dummy 1 0 UInt8 \N \N 8 2 0 \N \N \N \N \N \N \N \N \N \N UInt8
default default t n 1 0 UInt64 \N \N 64 2 0 \N \N \N \N \N \N \N \N \N \N UInt64 default default t n 1 0 UInt64 \N \N 64 2 0 \N \N \N \N \N \N \N \N \N \N UInt64
default default t f 2 0 Float32 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float32 default default t f 2 0 Float32 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float32
default default t s 3 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String default default t s 3 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String
default default t fs 4 0 FixedString(42) 42 42 \N \N \N \N \N \N \N \N \N \N \N \N \N FixedString(42) default default t fs 4 0 FixedString(42) 42 42 \N \N \N \N \N \N \N \N \N \N \N \N \N FixedString(42)
default default t d 5 0 Decimal(9, 6) \N \N 9 10 6 \N \N \N \N \N \N \N \N \N \N Decimal(9, 6) default default t d 5 0 Decimal(9, 6) \N \N 9 10 6 \N \N \N \N \N \N \N \N \N \N Decimal(9, 6)
default default v n 1 1 Nullable(Int32) \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N Nullable(Int32) default default v n 1 1 Nullable(Int32) \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N Nullable(Int32)
default default t f 2 0 Float32 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float32 default default t f 2 0 Float32 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float32
default default t fs 4 0 FixedString(42) 42 42 \N \N \N \N \N \N \N \N \N \N \N \N \N FixedString(42) default default t fs 4 0 FixedString(42) 42 42 \N \N \N \N \N \N \N \N \N \N \N \N \N FixedString(42)
default default t n 1 0 UInt64 \N \N 64 2 0 \N \N \N \N \N \N \N \N \N \N UInt64 default default t n 1 0 UInt64 \N \N 64 2 0 \N \N \N \N \N \N \N \N \N \N UInt64
default default t s 3 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String default default t s 3 0 String \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N String
default default v f 2 0 Float64 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float64 default default v f 2 0 Float64 \N \N \N \N \N \N \N \N \N \N \N \N \N \N \N Float64
tmp d 1 0 Date \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N Date tmp d 1 0 Date \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N Date
tmp dt 2 0 DateTime \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N DateTime tmp dt 2 0 DateTime \N \N \N \N \N 0 \N \N \N \N \N \N \N \N \N DateTime
tmp dtms 3 0 DateTime64(3) \N \N \N \N \N 3 \N \N \N \N \N \N \N \N \N DateTime64(3) tmp dtms 3 0 DateTime64(3) \N \N \N \N \N 3 \N \N \N \N \N \N \N \N \N DateTime64(3)
1
1
def default PRIMARY def default kcu i 1 \N \N \N \N def default PRIMARY def default kcu i 1 \N \N \N \N
default default v n 1 1 Nullable(Int32) \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N Nullable(Int32) default default v n 1 1 Nullable(Int32) \N \N 32 2 0 \N \N \N \N \N \N \N \N \N \N Nullable(Int32)
-- information_schema.key_column_usage
def default PRIMARY def default kcu1 i 1 \N \N \N \N def default PRIMARY def default kcu1 i 1 \N \N \N \N
def default PRIMARY def default kcu2 d 1 \N \N \N \N def default PRIMARY def default kcu2 d 1 \N \N \N \N
def default PRIMARY def default kcu2 u 1 \N \N \N \N def default PRIMARY def default kcu2 u 1 \N \N \N \N
-- information_schema.referential_constraints
1
1

57
tests/queries/0_stateless/01161_information_schema.sql
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@ -1,41 +1,52 @@
-- Uppercase/lowercase are okay, mixed case isn't
SHOW TABLES FROM information_schema;
SHOW TABLES FROM INFORMATION_SCHEMA;
SHOW TABLES FROM INFORMATION_schema; -- { serverError UNKNOWN_DATABASE }
DROP TABLE IF EXISTS t;
DROP VIEW IF EXISTS v;
DROP TABLE IF EXISTS t;
DROP VIEW IF EXISTS mv;
DROP TABLE IF EXISTS tmp;
DROP TABLE IF EXISTS kcu;
DROP TABLE IF EXISTS kcu1;
DROP TABLE IF EXISTS kcu2;
CREATE TABLE t (n UInt64, f Float32, s String, fs FixedString(42), d Decimal(9, 6)) ENGINE=Memory;
CREATE TABLE t (n UInt64, f Float32, s String, fs FixedString(42), d Decimal(9, 6)) ENGINE = Memory;
CREATE VIEW v (n Nullable(Int32), f Float64) AS SELECT n, f FROM t;
CREATE MATERIALIZED VIEW mv ENGINE=Null AS SELECT * FROM system.one;
CREATE MATERIALIZED VIEW mv ENGINE = Null AS SELECT * FROM system.one;
CREATE TEMPORARY TABLE tmp (d Date, dt DateTime, dtms DateTime64(3));
CREATE TABLE kcu (i UInt32, s String) ENGINE MergeTree ORDER BY i;
CREATE TABLE kcu1 (i UInt32, s String) ENGINE MergeTree ORDER BY i;
CREATE TABLE kcu2 (i UInt32, d Date, u UUID) ENGINE MergeTree ORDER BY (u, d);
-- FIXME #28687
SELECT * FROM information_schema.schemata WHERE schema_name ilike 'information_schema';
-- SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE (TABLE_SCHEMA=currentDatabase() OR TABLE_SCHEMA='') AND TABLE_NAME NOT LIKE '%inner%';
SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE (table_schema = currentDatabase() OR table_schema = '') AND table_name NOT LIKE '%inner%';
SELECT * FROM information_schema.views WHERE table_schema = currentDatabase();
-- SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE (TABLE_SCHEMA=currentDatabase() OR TABLE_SCHEMA='') AND TABLE_NAME NOT LIKE '%inner%'
SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE (table_schema = currentDatabase() OR table_schema = '') AND table_name NOT LIKE '%inner%';
SELECT '-- information_schema.schemata';
SELECT * FROM information_schema.schemata WHERE schema_name ilike 'information_schema' ORDER BY schema_name;
SELECT '-- information_schema.tables';
SELECT * FROM information_schema.tables WHERE table_schema = currentDatabase() AND table_name NOT LIKE '%inner%' ORDER BY table_name;
-- SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA=currentDatabase() ORDER BY schema_name;
-- FIXME #28687
SELECT '-- information_schema.views';
SELECT * FROM information_schema.views WHERE table_schema = currentDatabase() ORDER BY table_name;
-- SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE (TABLE_SCHEMA=currentDatabase() OR TABLE_SCHEMA='') AND TABLE_NAME NOT LIKE '%inner%'
SELECT '-- information_schema.columns';
SELECT * FROM information_schema.columns WHERE table_schema = currentDatabase() AND table_name NOT LIKE '%inner%' ORDER BY table_name, column_name;
SELECT '-- information_schema.key_column_usage';
SELECT * FROM information_schema.key_column_usage WHERE table_schema = currentDatabase() AND table_name = 'kcu1' ORDER BY table_schema, column_name;
SELECT * FROM information_schema.key_column_usage WHERE table_schema = currentDatabase() AND table_name = 'kcu2' ORDER BY table_schema, column_name;
SELECT '-- information_schema.referential_constraints';
SELECT * FROM information_schema.referential_constraints;
--
-- mixed upper/lowercase schema and table name:
SELECT count() FROM information_schema.TABLES WHERE table_schema = currentDatabase() AND table_name = 't';
SELECT count() FROM INFORMATION_SCHEMA.tables WHERE table_schema = currentDatabase() AND table_name = 't';
SELECT count() FROM INFORMATION_schema.tables WHERE table_schema = currentDatabase() AND table_name = 't'; -- { serverError UNKNOWN_DATABASE }
SELECT count() FROM information_schema.taBLES WHERE table_schema =currentDatabase() AND table_name = 't'; -- { serverError UNKNOWN_TABLE }
SELECT * FROM information_schema.key_column_usage WHERE table_schema = currentDatabase() AND table_name = 'kcu';
SELECT * FROM information_schema.key_column_usage WHERE table_schema = currentDatabase() AND table_name = 'kcu2';
SELECT * FROM information_schema.referential_constraints;
drop view mv;
drop view v;
drop table t;
drop table kcu;
drop table kcu2;
DROP VIEW mv;
DROP VIEW v;
DROP TABLE t;
DROP TABLE kcu1;
DROP TABLE kcu2;

8
tests/queries/0_stateless/02206_information_schema_show_database.reference
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@ -1,6 +1,6 @@
CREATE DATABASE INFORMATION_SCHEMA\nENGINE = Memory
CREATE VIEW INFORMATION_SCHEMA.COLUMNS\n(\n `table_catalog` String,\n `table_schema` String,\n `table_name` String,\n `column_name` String,\n `ordinal_position` UInt64,\n `column_default` String,\n `is_nullable` String,\n `data_type` String,\n `character_maximum_length` Nullable(UInt64),\n `character_octet_length` Nullable(UInt64),\n `numeric_precision` Nullable(UInt64),\n `numeric_precision_radix` Nullable(UInt64),\n `numeric_scale` Nullable(UInt64),\n `datetime_precision` Nullable(UInt64),\n `character_set_catalog` Nullable(String),\n `character_set_schema` Nullable(String),\n `character_set_name` Nullable(String),\n `collation_catalog` Nullable(String),\n `collation_schema` Nullable(String),\n `collation_name` Nullable(String),\n `domain_catalog` Nullable(String),\n `domain_schema` Nullable(String),\n `domain_name` Nullable(String),\n `column_comment` String,\n `column_type` String,\n `TABLE_CATALOG` String,\n `TABLE_SCHEMA` String,\n `TABLE_NAME` String,\n `COLUMN_NAME` String,\n `ORDINAL_POSITION` UInt64,\n `COLUMN_DEFAULT` String,\n `IS_NULLABLE` String,\n `DATA_TYPE` String,\n `CHARACTER_MAXIMUM_LENGTH` Nullable(UInt64),\n `CHARACTER_OCTET_LENGTH` Nullable(UInt64),\n `NUMERIC_PRECISION` Nullable(UInt64),\n `NUMERIC_PRECISION_RADIX` Nullable(UInt64),\n `NUMERIC_SCALE` Nullable(UInt64),\n `DATETIME_PRECISION` Nullable(UInt64),\n `CHARACTER_SET_CATALOG` Nullable(String),\n `CHARACTER_SET_SCHEMA` Nullable(String),\n `CHARACTER_SET_NAME` Nullable(String),\n `COLLATION_CATALOG` Nullable(String),\n `COLLATION_SCHEMA` Nullable(String),\n `COLLATION_NAME` Nullable(String),\n `DOMAIN_CATALOG` Nullable(String),\n `DOMAIN_SCHEMA` Nullable(String),\n `DOMAIN_NAME` Nullable(String),\n `COLUMN_COMMENT` String,\n `COLUMN_TYPE` String\n) AS\nSELECT\n database AS table_catalog,\n database AS table_schema,\n table AS table_name,\n name AS column_name,\n position AS ordinal_position,\n default_expression AS column_default,\n type LIKE \'Nullable(%)\' AS is_nullable,\n type AS data_type,\n character_octet_length AS character_maximum_length,\n character_octet_length,\n numeric_precision,\n numeric_precision_radix,\n numeric_scale,\n datetime_precision,\n NULL AS character_set_catalog,\n NULL AS character_set_schema,\n NULL AS character_set_name,\n NULL AS collation_catalog,\n NULL AS collation_schema,\n NULL AS collation_name,\n NULL AS domain_catalog,\n NULL AS domain_schema,\n NULL AS domain_name,\n comment AS column_comment,\n type AS column_type,\n table_catalog AS TABLE_CATALOG,\n table_schema AS TABLE_SCHEMA,\n table_name AS TABLE_NAME,\n column_name AS COLUMN_NAME,\n ordinal_position AS ORDINAL_POSITION,\n column_default AS COLUMN_DEFAULT,\n is_nullable AS IS_NULLABLE,\n data_type AS DATA_TYPE,\n character_maximum_length AS CHARACTER_MAXIMUM_LENGTH,\n character_octet_length AS CHARACTER_OCTET_LENGTH,\n numeric_precision AS NUMERIC_PRECISION,\n numeric_precision_radix AS NUMERIC_PRECISION_RADIX,\n numeric_scale AS NUMERIC_SCALE,\n datetime_precision AS DATETIME_PRECISION,\n character_set_catalog AS CHARACTER_SET_CATALOG,\n character_set_schema AS CHARACTER_SET_SCHEMA,\n character_set_name AS CHARACTER_SET_NAME,\n collation_catalog AS COLLATION_CATALOG,\n collation_schema AS COLLATION_SCHEMA,\n collation_name AS COLLATION_NAME,\n domain_catalog AS DOMAIN_CATALOG,\n domain_schema AS DOMAIN_SCHEMA,\n domain_name AS DOMAIN_NAME,\n column_comment AS COLUMN_COMMENT,\n column_type AS COLUMN_TYPE\nFROM system.columns
CREATE VIEW INFORMATION_SCHEMA.TABLES (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW INFORMATION_SCHEMA.tables (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW information_schema.TABLES (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW information_schema.tables (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW INFORMATION_SCHEMA.TABLES (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `data_length` Nullable(UInt64), `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `DATA_LENGTH` Nullable(UInt64), `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, total_bytes AS data_length, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, data_length AS DATA_LENGTH, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW INFORMATION_SCHEMA.tables (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `data_length` Nullable(UInt64), `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `DATA_LENGTH` Nullable(UInt64), `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, total_bytes AS data_length, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, data_length AS DATA_LENGTH, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW information_schema.TABLES (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `data_length` Nullable(UInt64), `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `DATA_LENGTH` Nullable(UInt64), `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, total_bytes AS data_length, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, data_length AS DATA_LENGTH, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables
CREATE VIEW information_schema.tables (`table_catalog` String, `table_schema` String, `table_name` String, `table_type` String, `data_length` Nullable(UInt64), `table_collation` Nullable(String), `table_comment` Nullable(String), `TABLE_CATALOG` String, `TABLE_SCHEMA` String, `TABLE_NAME` String, `TABLE_TYPE` String, `DATA_LENGTH` Nullable(UInt64), `TABLE_COLLATION` Nullable(String), `TABLE_COMMENT` Nullable(String)) AS SELECT database AS table_catalog, database AS table_schema, name AS table_name, multiIf(is_temporary, \'LOCAL TEMPORARY\', engine LIKE \'%View\', \'VIEW\', engine LIKE \'System%\', \'SYSTEM VIEW\', has_own_data = 0, \'FOREIGN TABLE\', \'BASE TABLE\') AS table_type, total_bytes AS data_length, \'utf8mb4_0900_ai_ci\' AS table_collation, comment AS table_comment, table_catalog AS TABLE_CATALOG, table_schema AS TABLE_SCHEMA, table_name AS TABLE_NAME, table_type AS TABLE_TYPE, data_length AS DATA_LENGTH, table_collation AS TABLE_COLLATION, table_comment AS TABLE_COMMENT FROM system.tables