69 lines
1.6 KiB
Plaintext
69 lines
1.6 KiB
Plaintext
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//
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//Requirements:
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// GROUP BY
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// HAVING
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// ORDER BY
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// ALL
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// DISTINCT
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// LIKE
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// MAX (?)
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// MIN (?)
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//Notes on joins
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//(1) Aliases are enforced once used for any given table
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//(2) Alias can be used for some tables, but not others
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//
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//New style:
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// select * from t1 cross join t2
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// select * from t1 cross join t2 where t1.x = t2.x
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// [Note:CROSS JOIN allows a where clause, other JOIN ops do not, but require ON]
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//
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// LEFT OUTER JOIN <on>
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// RIGHT OUTER JOIN <on>
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// FULL OUTER JOIN <on>
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// JOIN <on>
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// CROSS JOIN <where>
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//
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//
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//
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//<select [all|distinct] <select_list> from <> where <>
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// [group by] [having] [order by]
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//OUTPUT:
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//(1) General complexity flags
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// A. BOOLEAN: JOIN
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// B. BOOLEAN: OLD JOIN
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// C. BOOLEAN: NEW JOIN
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// D. BOOLEAN: ON Clause
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// F. BOOLEAN: SELF-JOIN OCCURS
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// G: INT: NUMBER OF TABLES JOINED
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// E. BOOLEAN: UNARY Query
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// F. BOOLEAN: WBEM Refs/Assocs
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//
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// F. BOOLEAN: ALIASES
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// D. BOOLEAN: WQL 1.0 provider compatible simple query
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// F. BOOLEAN: WQL Temporal/Event extension
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// E. BOOLEAN: ORDER BY
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// F. BOOLEAN: GROUP BY
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// G. BOOLEAN: HAVING
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// H. SQL-89 COMPATIBLE
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// I. SQL-92 COMPATIBLE
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// F: DISTINCT
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// G: EQUIJOIN
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// H: THETA-JOIN <non equijoin>
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//
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// (2) Get number & list of classes/tables (NULL separated)
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// (3) Get list of selected column references in the output
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// (4) Get list of column names used in ON
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// (5) Get list of column names used in WHERE
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//(2) Select column list
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//(3) Add *= and =* operators
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//
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