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spark-instrumented-optimizer/docs/sql-ref-syntax-aux-show-table.md
Huaxin Gao 75da05038b [MINOR][SQL][DOCS] Remove two leading spaces from sql tables 
### What changes were proposed in this pull request?
Remove two leading spaces from sql tables.

### Why are the changes needed?

Follow the format of other references such as https://docs.snowflake.com/en/sql-reference/constructs/join.html, https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_10002.htm, https://www.postgresql.org/docs/10/sql-select.html.

### Does this PR introduce any user-facing change?

before
```
SELECT * FROM  test;
  +-+
  ...
  +-+
```
after
```
SELECT * FROM  test;
+-+
...
+-+
```

### How was this patch tested?
Manually build and check

Closes #28348 from huaxingao/sql-format.

Authored-by: Huaxin Gao <huaxing@us.ibm.com>
Signed-off-by: gatorsmile <gatorsmile@gmail.com>
2020-05-01 10:11:43 -07:00

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global SHOW TABLE EXTENDED SHOW TABLE EXTENDED Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Description

SHOW TABLE EXTENDED will show information for all tables matching the given regular expression. Output includes basic table information and file system information like Last Access, Created By, Type, Provider, Table Properties, Location, Serde Library, InputFormat, OutputFormat, Storage Properties, Partition Provider, Partition Columns and Schema.

If a partition specification is present, it outputs the given partition's file-system-specific information such as Partition Parameters and Partition Statistics. Note that a table regex cannot be used with a partition specification.

Syntax

{% highlight sql %} SHOW TABLE EXTENDED [ IN | FROM database_name ] LIKE regex_pattern [ partition_spec ] {% endhighlight %}

Parameters

IN|FROM database_name
Specifies database name. If not provided, will use the current database.
regex_pattern
Specifies the regular expression pattern that is used to filter out unwanted tables.
  • Except for * and | character, the pattern works like a regular expression.
  • * alone matches 0 or more characters and | is used to separate multiple different regular expressions, any of which can match.
  • The leading and trailing blanks are trimmed in the input pattern before processing. The pattern match is case-insensitive.
partition_spec
An optional parameter that specifies a comma separated list of key and value pairs for partitions. Note that a table regex cannot be used with a partition specification.

Syntax: PARTITION ( partition_col_name [ = partition_col_val ] [ , ... ] )

Examples

{% highlight sql %} -- Assumes employee table created with partitioned by column grade CREATE TABLE employee(name STRING, grade INT) PARTITIONED BY (grade); INSERT INTO employee PARTITION (grade = 1) VALUES ('sam'); INSERT INTO employee PARTITION (grade = 2) VALUES ('suj');

-- Show the details of the table SHOW TABLE EXTENDED LIKE 'employee'; +--------+---------+-----------+--------------------------------------------------------------+ |database|tableName|isTemporary| information | +--------+---------+-----------+--------------------------------------------------------------+ |default |employee |false |Database: default Table: employee Owner: root Created Time: Fri Aug 30 15:10:21 IST 2019 Last Access: Thu Jan 01 05:30:00 IST 1970 Created By: Spark 3.0.0-SNAPSHOT Type: MANAGED Provider: hive Table Properties: [transient_lastDdlTime=1567158021] Location: file:/opt/spark1/spark/spark-warehouse/employee Serde Library: org.apache.hadoop.hive.serde2.lazy .LazySimpleSerDe InputFormat: org.apache.hadoop.mapred.TextInputFormat OutputFormat: org.apache.hadoop.hive.ql.io .HiveIgnoreKeyTextOutputFormat Storage Properties: [serialization.format=1] Partition Provider: Catalog Partition Columns: [grade] Schema: root |-- name: string (nullable = true) |-- grade: integer (nullable = true)

+--------+---------+-----------+--------------------------------------------------------------+

-- showing the multiple table details with pattern matching SHOW TABLE EXTENDED LIKE employe*; +--------+---------+-----------+--------------------------------------------------------------+ |database|tableName|isTemporary| information | +--------+---------+-----------+--------------------------------------------------------------+ |default |employee |false |Database: default Table: employee Owner: root Created Time: Fri Aug 30 15:10:21 IST 2019 Last Access: Thu Jan 01 05:30:00 IST 1970 Created By: Spark 3.0.0-SNAPSHOT Type: MANAGED Provider: hive Table Properties: [transient_lastDdlTime=1567158021] Location: file:/opt/spark1/spark/spark-warehouse/employee Serde Library: org.apache.hadoop.hive.serde2.lazy .LazySimpleSerDe InputFormat: org.apache.hadoop.mapred.TextInputFormat OutputFormat: org.apache.hadoop.hive.ql.io .HiveIgnoreKeyTextOutputFormat Storage Properties: [serialization.format=1] Partition Provider: Catalog Partition Columns: [grade] Schema: root |-- name: string (nullable = true) |-- grade: integer (nullable = true)

|default |employee1|false |Database: default Table: employee1 Owner: root Created Time: Fri Aug 30 15:22:33 IST 2019 Last Access: Thu Jan 01 05:30:00 IST 1970 Created By: Spark 3.0.0-SNAPSHOT Type: MANAGED Provider: hive Table Properties: [transient_lastDdlTime=1567158753] Location: file:/opt/spark1/spark/spark-warehouse/employee1 Serde Library: org.apache.hadoop.hive.serde2.lazy .LazySimpleSerDe InputFormat: org.apache.hadoop.mapred.TextInputFormat OutputFormat: org.apache.hadoop.hive.ql.io .HiveIgnoreKeyTextOutputFormat Storage Properties: [serialization.format=1] Partition Provider: Catalog Schema: root |-- name: string (nullable = true)

+--------+---------+----------+---------------------------------------------------------------+

-- show partition file system details SHOW TABLE EXTENDED IN default LIKE employee PARTITION (grade=1); +--------+---------+-----------+--------------------------------------------------------------+ |database|tableName|isTemporary| information | +--------+---------+-----------+--------------------------------------------------------------+ |default |employee |false |Partition Values: [grade=1] Location: file:/opt/spark1/spark/spark-warehouse/employee /grade=1 Serde Library: org.apache.hadoop.hive.serde2.lazy .LazySimpleSerDe InputFormat: org.apache.hadoop.mapred.TextInputFormat OutputFormat: org.apache.hadoop.hive.ql.io .HiveIgnoreKeyTextOutputFormat Storage Properties: [serialization.format=1] Partition Parameters: {rawDataSize=-1, numFiles=1, transient_lastDdlTime=1567158221, totalSize=4, COLUMN_STATS_ACCURATE=false, numRows=-1} Created Time: Fri Aug 30 15:13:41 IST 2019 Last Access: Thu Jan 01 05:30:00 IST 1970 Partition Statistics: 4 bytes | +--------+---------+-----------+--------------------------------------------------------------+

-- show partition file system details with regex fails as shown below SHOW TABLE EXTENDED IN default LIKE empl* PARTITION (grade=1); Error: Error running query: org.apache.spark.sql.catalyst.analysis.NoSuchTableException: Table or view 'emplo*' not found in database 'default'; (state=,code=0) {% endhighlight %}

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