26 research outputs found
ΠΠΎΠ²ΡΠ΅ Π°Π»Π³ΠΎΡΠΈΡΠΌΡ Π»Π΅ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π·Π°ΠΏΡΠΎΡΠΎΠ²
New algorithms for query modifications are proposed. These algorithms involve the lexical optimization based on the mathematical transformations that have never been used for the query optimization before.ΠΡΠ΅Π΄Π»Π°Π³Π°ΡΡΡΡ Π½ΠΎΠ²ΡΠ΅ Π°Π»Π³ΠΎΡΠΈΡΠΌΡ ΠΌΠΎΠ΄ΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ Π·Π°ΠΏΡΠΎΡΠ°. ΠΡΠΈ Π°Π»Π³ΠΎΡΠΈΡΠΌΡ Π²ΠΊΠ»ΡΡΠ°ΡΡ Π»Π΅ΠΊΡΠΈΡΠ΅ΡΠΊΡΡ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΡ, ΠΎΡΠ½ΠΎΠ²Π°Π½Π½ΡΡ Π½Π° ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡΡ
, ΠΊΠΎΡΠΎΡΡΠ΅ ΡΠ°Π½Π΅Π΅ Π½Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΈΡΡ Π΄Π»Ρ Π·Π°Π΄Π°Ρ, ΡΠ²ΡΠ·Π°Π½Π½ΡΡ
Ρ ΠΏΡΠ΅ΠΎΠ±Β¬ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π·Π°ΠΏΡΠΎΡΠΎΠ²
ΠΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΡ ΠΊΠΎΠ½ΡΡΠ½ΠΊΡΠΎΠ² ΡΡΠ»ΠΎΠ²ΠΈΠΉ Π² ΡΠΎΡΡΠ°Π²Π΅ Π·Π°ΠΏΡΠΎΡΠΎΠ²
A new algorithm for query optimization is proposed. This algorithm simplifies queries
restriction containing multi-attribute conditions. It also solves the problem of "Condition
AND Conjunction of conditions" expressions.ΠΡΠ΅Π΄Π»Π°Π³Π°Π΅ΡΡΡ Π½ΠΎΠ²ΡΠΉ Π°Π»Π³ΠΎΡΠΈΡΠΌ ΠΎΠΏΡΠΈΠΌΠΈΠ·Π°ΡΠΈΠΈ Π·Π°ΠΏΡΠΎΡΠ°. ΠΡΠΎΡ Π°Π»Π³ΠΎΡΠΈΡΠΌ ΡΠΎΠΊΡΠ°ΡΠ°Π΅Ρ ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΈΡ Π·Π°ΠΏΡΠΎΡΠΎΠ², ΡΠΎΠ΄Π΅ΡΠΆΠ°ΡΠΈΡ
ΠΌΠ½ΠΎΠ³ΠΎΠ°ΡΡΠΈΠ±ΡΡΠ½ΡΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ. ΠΠ½ ΡΠ°ΠΊΠΆΠ΅ ΡΠ΅ΡΠ°Π΅Ρ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΠΉ Β«Π£ΡΠ»ΠΎΠ²ΠΈΠ΅ AND ΠΠΎΠ½ΡΡΠ½ΠΊΡΠΈΡ ΡΡΠ»ΠΎΠ²ΠΈΠΉΒ»
New algorithms for query modifications
New algorithms for query modifications are proposed. These algorithms involve the lexical optimization based on the mathematical transformations that have never been used for the query optimization before
Optimization of Queries Containing Conjunctions of Conditions
A new algorithm for query optimization is proposed. This algorithm simplifies queries
restriction containing multi-attribute conditions. It also solves the problem of "Condition
AND Conjunction of conditions" expressions