Optimizer: SAP DB 7.4
   Factors that Influence the Processing of an SQL Statement
   Runtime Improvement for SQL Applications
   Search Condition
      Equality Condition
      Area Condition
      IN Condition
      LIKE Condition
   Search Strategy
      Sequential Search
      Search Conditions for Key Columns
      Search Conditions for Inverted Columns
         Examples: Search Conditions for Inverted Columns
      Search Conditions for UPDATE Statements
      Cost Determination
      Search Conditions Linked with OR
      Postponement of the Search to the FETCH Time
      Join
      List of All Search Strategies
         CATALOG KEY ACCESS
         CATALOG SCAN
         CATALOG SCAN USING USER EQUAL CONDITION
         DIFFERENT STRATEGIES FOR OR-TERMS
         EQUAL CONDITION FOR INDEX
         EQUAL CONDITION FOR INDEX (SUBQ)
         EQUAL CONDITION FOR KEY COLUMN
         EQUAL CONDITION FOR KEY COLUMN (SUBQ)
         IN CONDITION FOR INDEX
         IN CONDITION FOR KEY COLUMN
         JOIN VIA INDEXED COLUMN
         JOIN VIA KEY COLUMN
         JOIN VIA KEY RANGE
         JOIN VIA MULTIPLE INDEXED COLUMNS
         JOIN VIA MULTIPLE KEY COLUMNS
         JOIN VIA RANGE OF MULTIPLE INDEXED COL.
         JOIN VIA RANGE OF MULTIPLE KEY COLUMNS
         NO RESULT SET POSSIBLE
         NO STRATEGY NOW (ONLY AT EXECUTION TIME)
         RANGE CONDITION FOR KEY COLUMN
         RANGE CONDITION FOR KEY COLUMN (SUBQ)
         RANGE CONDITION FOR INDEX
         RANGE CONDITION FOR INDEX (SUBQ)
         INDEX SCAN
         TABLE SCAN
   EXPLAIN Statement
      EXPLAIN Statement for Joins
      EXPLAIN Statement for Complicated SELECT Statements
      EXPLAIN Statement for SELECT Statements with Subqueries
      EXPLAIN Statement: Columns O,D,T,M
   Terms and Examples
      Inverted Column
      Inversion List
      Examples
         example
         ind
         indf
         invcolumn1
         invcolumn2
         one
         ten1
         ten2