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Code Inspections in SQL

Inspection

Description

Default Severity

Unresolved reference

This inspection performs unresolved SQL references check.

Error
Types compatibility

This inspection performs type-related check.

Warning
Unused variable

This inspection performs unused argument/variable check.

Warning
Unused subquery item

This inspection reports unused subquery items: columns and aliases that are not referenced in the outer query expression

Warning
Identifier should be quoted

This inspection performs SQL identifier names check.

Warning
Ambiguous reference

This inspection checks that column reference resolves to a single column.

Warning
VALUES clause cardinality

This inspection checks that the number of VALUES (...) parameters matches target table column list size.

Warning
SQL dialect detection

Detects the best matching SQL dialect for files in <Generic> dialect.

Warning
Current console schema introspected

Warns if current session's schema/database is not introspected.

Warning
SQL source modification detection

Detects that database sources have changed.

Warning
No data sources configured

Prompts one to create a data source if there is none.

Warning
Each derived table should have alias

This inspection checks that each derived table should have own alias.

Warning
Column should be in group by clause

This inspection checks that column should be in group by clause or inside aggregate function call.

Warning
Constant condition

Reports those conditions in the where or join clauses that are alwaystrue or false.

Warning
Auto-increment duplicate

This inspection checks auto_increment duplicates in MySQL, MS SQL and Db2 dialects. A table in those dialects can contain only one auto-incrementing field.

Warning
Index is dependent on column

This inspection checks dropping indexed columns in MS SQL and Sybase SQL Server.

Warning
Adding not null column without default value

Necessary to specify the default value for the new column with not null constraint.

Warning
Check using clause columns

This inspection checks that columns inside using clause exist in both tables.

Warning
Null comparison

This inspection checks suspicious comparisons with NULL.

Warning
Function signature

This inspection performs function signature check.

Warning
Statement with side effects

This inspection only runs during a read-only connection andreports statements that may lead to modification of the database.

Warning
Delete or update statement without where clauses

Reports usages of 'delete' or 'update' statements without any 'where' clauses.When used without 'where' clauses, 'delete' drops all the data from the table, and 'update' overwrites values for all table rows.

Warning
SQL error handling

Highlights invalid usages of constructs that handle exceptions in SQL routines

Error
Unsafe 'join' clause in 'delete' statement

Reports usages of 'join' clause inside a 'delete' statement where no 'on' or 'where' checks are present.Without conditional checks on 'join', 'delete' drops contents of the entire table.

Warning
Unreachable code

This inspection reports unreachable statements inside SQL routines.

Warning
Illegal cursor state

This inspection reports illegal cursor states inside SQL routines.

Warning
Named arguments should be used

This inspection reports routine calls without named arguments

Disabled

Usages of GOTO statements

This inspection reports usages of a GOTO statement

Disabled

Suspicious or incorrect usages of built-in functions

This inspection reports suspicious or incorrect use cases of SQL Server built-in functions

Warning
Suspicious code in triggers

This inspection reports incorrect usages of transition table variables in triggers

Warning
Redundant ordering direction

This inspection reports redundant ordering direction in ORDER BY clauses.

Warning
Aggregate-related problems

This inspection reports incorrect or suspicious usages of SQL aggregate functions.

Warning
Using CASE instead of conditional function and vice versa

This inspection reports CASE expressions which can be replaced with IF-like function calls or vice versa depending on the chosen preferences

Warning
Using CASE instead of COALESCE function and vice versa

This inspection reports CASE expressions which can be replaced with COALESCE calls or vice versa depending on the chosen preferences

Warning
Implicit string truncation

Detects variable assignments which involve implicit string truncation

Warning
Redundant alias expressions

This inspection reports redundant alias expressions

Warning
Redundant row limiting in queries

This inspection reports redundant row limiting in queries.

Warning
Multiple row limiting/offset clauses in queries

This inspection reports queries with multiple row limiting/offset clauses.

Warning
Insertion into generated columns

This inspection reports INSERT statements which assign values to generated columns

Warning
MySQL: Syntax

Provides diagnostic of MySQL parser idiosyncrasies.

Warning
Deprecated type

Since 8.0 the 'long' type is deprecated and not recommended to use (because API for this type doesn't utilize character streams but transfer whole values each time). In Oracle, do not create a table with LONG columns. Use LOB columns (CLOB, NCLOB, BLOB) instead. LONG columns are supported only for backward compatibility.

Warning
Postgres: Select from procedure call

Select from dblink or function that returns record require typed alias list.Scalar functions do not require alias and forbid typed alias lists completely.

Warning
Last modified: 15 October 2019