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SQL Analysis Observations
This topic lists all the SQL analysis observations.
Observation: Ascending Key Column Cardinalities
Observation: Bind Package Timestamp
Observation: Column and Literal Length Mismatch
Observation: Column Function Contains Expression
Observation: Column Without Index On a Predicate
Observation: Correlated Subquery uses EXISTS or NOT EXISTS
Observation: COUNT(*) for Large Result Set
Observation: CURRENTDATA(YES) (for a package)
Observation: CURRENTDATA(YES) (for a plan)
Observation: Data Page Relocation
Observation: DELETE Statement with No WHERE Clause
Observation: DISTINCT Precedes Atomic Value
Observation: Fixed Length Column follows VARCHAR
Observation: Hybrid Join and Low Cluster Ratio
Observation: Hybrid Join Invokes Sort for Inner Join
Observation: Index Access for Large Result Set
Observation: Index and Data Page Offset
Observation: Indexes Defined for Small Table
Observation: Inefficient Page Size for Table
Observation: Join without Criteria
Observation: Key Columns Updated
Observation: LIKE Operator in Predicate and Column has Fieldproc defined
Observation: LIST SEQUENTIAL PREFETCH
Observation: Low Index Cluster Ratio
Observation: Many Column Functions
Observation: Many Index Leaf Pages
Observation: Many Index Levels
Observation: Many Indexes for a Table
Observation: Many Table Rows in Tablespace
Observation: Many Tables in Tablespace
Observation: Materialized View
Observation: Merge Scan Join for Large Tables
Observation: Multiple Columns from the Same Table
Observation: Multiple Uniqueness Clauses
Observation: No Index on Foreign Key
Observation: No Statistics Generated
Observation: Non-indexable LIKE Predicate
Observation: Possible Non-indexable BETWEEN
Observation: Quantified Predicate with Subselect
Observation: Row Size Greater than Half Page Size
Observation: Scalar Function in WHERE Clause
Observation: Selecting All Columns
Observation: Sort Invoked for DISTINCT
Observation: Sort Invoked for Large Table
Observation: Sort Invoked for UNION
Observation: UNION References Same Table
Observation: Use of Greater Than or Equal To or Less Than or Equal to Predicate
Observation: Use of NOT Predicate