Rule Definition
SQL Queries that do not use table indexes are extremely dangerous for the application's performance. Indeed, each execution of the query will result in a full table scan which is extremely time consuming.

Remediation
Try to use indexed columns in WHERE and HAVING clauses. If it is not possible, then create a secondary index for these columns.

Violation Code Sample

TABLE1 is indexed on (COL2, COL1) and TABLE2 on COL3. Both tables are not XXS.
For the following statement :
Select O.COL1, O.COL2, O.COL2, 1, 0, 0, 1
From TABLE1 O, TABLE2 OT
Where O.COL3       = OT.COL3
And O.COL1      in (1, 2)
And OT.COL4    = 1;
TABLE2's index cover the statement.
TABLE1 is reported in violation.

Fixed Code Sample

TABLE1 is indexed on (COL2, COL1) and TABLE2 on COL3. Both tables are not XXS.
For the following statement :
Select O.COL1, O.COL2, O.COL2, 1, 0, 0, 1
From TABLE1 O, TABLE2 OT
Where O.COL3       = OT.COL3
And O.COL1      in (1, 2)
And OT.COL4    = 1;
TABLE2's index cover the statement.
TABLE1 is reported in violation. The remediation is to add index on TABLE1 (COL3, COL1).

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