[HIVE-16575] Support for 'UNIQUE' and 'NOT NULL' constraints - ASF JIRA

Log work

Agile Board

Rank to Top

Rank to Bottom

Bulk Copy Attachments

Bulk Move Attachments

Voters

Watch issue

Watchers

Create sub-task

Convert to sub-task

Move

Link

Clone

Labels

Update Comment Author

Replace String in Comment

Update Comment Visibility

Delete Comments

XML

Word

Printable

JSON

Details

Type: New Feature
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.0.0
Component/s: CBO, Logical Optimizer, Parser
Labels:

Target Version/s:

3.0.0

Description

Follow-up on ~~HIVE-13076~~.

This issue add support for SQL 'UNIQUE' and 'NOT NULL' constraints when we create a table / alter a table (https://www.postgresql.org/docs/9.6/static/sql-createtable.html).

As with PK and FK constraints, currently we do not enforce them; thus, the constraints need to use the DISABLE option, but they will be stored and can be enabled for rewriting/optimization using RELY.

This patch also adds support for inlining the constraints next to the column type definition, i.e., 'column constraints'.

Some examples of the extension to the syntax included in the patch:

CREATE TABLE table3 (x string NOT NULL DISABLE, PRIMARY KEY (x) DISABLE, CONSTRAINT fk1 FOREIGN KEY (x) REFERENCES table2(a) DISABLE); 
CREATE TABLE table4 (x string CONSTRAINT nn4_1 NOT NULL DISABLE, y string CONSTRAINT nn4_2 NOT NULL DISABLE, UNIQUE (x) DISABLE, CONSTRAINT fk2 FOREIGN KEY (x) REFERENCES table2(a) DISABLE, 
CONSTRAINT fk3 FOREIGN KEY (y) REFERENCES table2(a) DISABLE);
CREATE TABLE table12 (a STRING CONSTRAINT nn12_1 NOT NULL DISABLE NORELY, b STRING);
CREATE TABLE table13 (a STRING NOT NULL DISABLE RELY, b STRING);
CREATE TABLE table14 (a STRING CONSTRAINT nn14_1 NOT NULL DISABLE RELY, b STRING);
CREATE TABLE table15 (a STRING REFERENCES table4(x) DISABLE, b STRING);
CREATE TABLE table16 (a STRING CONSTRAINT nn16_1 REFERENCES table4(x) DISABLE RELY, b STRING);
ALTER TABLE table16 CHANGE a a STRING REFERENCES table4(x) DISABLE NOVALIDATE;
ALTER TABLE table12 CHANGE COLUMN b b STRING CONSTRAINT nn12_2 NOT NULL DISABLE NOVALIDATE;
ALTER TABLE table13 CHANGE b b STRING NOT NULL DISABLE NOVALIDATE;