Dear Wiki user, You have subscribed to a wiki page or wiki category on "Lucene-hadoop Wiki" for change notification.
The following page has been changed by udanax: http://wiki.apache.org/lucene-hadoop/Hbase/ShellPlans ------------------------------------------------------------------------------ Plan is to significantly expand the set of shell operators. Basic data manipulation and data definition operators will be extended and evolved to be more SQL-like ([wiki:Hbase/HbaseShell/HQL HQL]). More sophisticated manipulations to do relational and linear algebra, matrix additions, multiplications, etc., will be added to a HBase subshell to keep the two operator types -- SQL-like vs. non-SQL -- distinct. ''-- After POC(proof of concept) review, many things can change.'' + + This project is currently in the planning stage. [https://issues.apache.org/jira/browse/HADOOP-1608 HADOOP-1608] to add "Relational Algrebra Operators" is currently in process. ---- @@ -36, +38 @@ ---- - === Suggested Hbase altools Syntax === + == Suggested Hbase altools Syntax == '''Note''' that Data should be located by their row, column, and timestamp. - ==== Commands ==== + === Commands === ||<bgcolor="#E5E5E5">'''Command''' ||<bgcolor="#E5E5E5">'''Explanation''' || ||Table ||<99%>'''Table''' command loads specified table. [[BR]][[BR]]~-''Table('movieLog_table');''-~ || ||Matrix ||<99%>'''Matrix''' command constructs the configuration of the logic matrix.[[BR]]'''Options''' : features not yet. [[BR]][[BR]]~-''Matrix(table_name, columnfamily_name[, option]);''-~ || @@ -47, +49 @@ ||IF...ELSE ||<99%>'''IF...ELSE''', Imposes conditions on the execution. [[BR]][[BR]]~-''IF ( boolean_expression )[[BR]]B = command_statements;[[BR]]ELSE[[BR]]B = command_statements;''-~|| ||Store ||<99%>'''Store''' command will store results to specified table. [[BR]][[BR]]~-''A = Table('movieLog_table'); [[BR]]B = A.Selection(length > 100); [[BR]]Store B TO table('tmp_table')[or file('backup.dat')];''-~ || - ==== Relational Operators ==== + === Relational Operators === ||<bgcolor="#E5E5E5">'''Operator''' ||<bgcolor="#E5E5E5">'''Explanation''' || ||Projection ||<99%>'''Projection''' of a relation ~+R+~, It makes a new relation as the set that is obtained when all tuples(rows) in ~+R+~ are restricted to the set {columnfamily,,1,,,...,columnfamily,,n,,}.[[BR]][[BR]]~-''A = Table('movieLog_table');[[BR]]B = A.Projection('year','length'); '''//Ï,,year.length,,(A)''' ''-~ || ||Selection ||<99%>'''Selection''' of a relation ~+R+~, It makes a new relation as the set of specified tuples(rows) of the relation ~+R+~.[[BR]]'''Set Operations''' : ~-''OR, AND, NOT''-~[[BR]][[BR]]~-''A = Table('movieLog_table');[[BR]]B = A.Selection(length > 100 AND studioName = 'Fox'); '''//Ï,,length > 100.studioName='Fox',,(A)''' ''-~ || @@ -77, +79 @@ Hbase.altools > store C to table('result_table'); }}} - ==== Matrix Arithmetic Operators ==== + === Matrix Arithmetic Operators === ||<bgcolor="#E5E5E5">'''Operator''' ||<bgcolor="#E5E5E5">'''Explanation''' || ||Addition ||<99%>'''Adding''' entries with the same indices. [[BR]][[BR]]~-''A = Matrix('m_table','cf_1');[[BR]]B = Matrix('m_table','cf_2');[[BR]]C = A + B; '''// c,,ij,, = a,,ij,, + b,,ij,, (i : row key, j : column key)''' ''-~ || ||Subtraction ||<99%>'''Subtracting''' entries with the same indices.[[BR]][[BR]]~-''A = Matrix('m_table','cf_1');[[BR]]B = Matrix('m_table','cf_2');[[BR]]C = A - B; '''// c,,ij,, = a,,ij,, - b,,ij,, (i : row key, j : column key)''' ''-~ || @@ -94, +96 @@ Hbase.altools > C = A * B; }}} - ==== Factorizations and Decompositions ==== + === Factorizations and Decompositions === ||<bgcolor="#E5E5E5">'''Function''' ||<bgcolor="#E5E5E5">'''Explanation''' || ||LU ||<99%>'''LU Decomposition'''[[BR]]A procedure for decomposing an N by N matrix A into a product of a lower triangular matrix L and an upper triangular matrix U, LU = A.[[BR]]'''Functions''' : ~-''getL(), getU(), isSingular(), getPivot()''-~ [[BR]][[BR]]~-''A = Matrix('m_table','cf_1');[[BR]]B = LUDecomposition(A);[[BR]]C = getU(B);[[BR]]D = getL(A);''-~|| @@ -134, +136 @@ St.Ack }}} - This project is currently in the planning stage. [https://issues.apache.org/jira/browse/HADOOP-1608 HADOOP-1608] to add "Relational Algrebra Operators" is currently in process. - - ---- - = Example Of Hbase Shell Use = - - See the HBase Shell Full Usage Page. - * [:Hbase/HbaseShell/Examples] -
