Shulou(Shulou.com)06/01 Report--

1. FilterList

//By setting the operator parameter to Operator.MUST_PASS_ONE, achieve the relationship where each filter in the list is "OR" or //The default operator parameter value is Operator.MUST_PASS_ALL, i.e. the relationship between filters in the list is "and" and FilterList f=new FilterList(FilterList.Operator.MUST_PASS_ONE);

2. How many filters

1、Comparision Filters

1.1 RowFilter √

1.2 FamilyFilter √

1.3 QualifierFilter √

1.4 ValueFilter √

1.5 DependentColumnFilter ×

2、Dedicated Filters

2.1 SingleColumnValueFilter ×

2.2 SingleColumnValueExcludeFilter ×

2.3 PrefixFilter ×

2.4 PageFilter ×

2.5 KeyOnlyFilter ×

2.6 FirstKeyOnlyFilter ×

2.7 TimestampsFilter ×

2.8 RandomRowFilter ×

3、Decorating Filters

3.1 SkipFilter ×

3.2 WhileMatchFilters ×

1.1 RowFilter

Format: RowFilter(CompareFilter.CompareOp rowCompareOp, ByteArrayComparable Comparator)

Parameter 1 Operator Description

Less than

LESS_OR_EQUAL Less than or equal to

EQUAL equals

NOT_EQUAL is NOT equal to

GREATER_OR_EQUAL greater than or equal to

GREATER is greater than

NO_OP excludes all

Parameter 2 ByteArrayComparable Available

BinaryComparator, BinaryPrefixComparator, BitComparator, LongComparator, NullComparator, RegexStringComparator, SubstringComparator

Filter filter=new RowFilter(CompareOp.EQUAL, new BinaryComparator(Bytes.toBytes(RowKey))

Related filtering methods use:

extract rowkey data ending in 01--regular expressions

Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new RegexStringComparator(".* 01$"));

Extract rowkey to contain data for 201407

Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new SubstringComparator("201407"));

Extract rowkey data starting with 123

Filter filter = new RowFilter(CompareFilter.CompareOp.EQUAL,new BinaryPrefixComparator("123".getBytes()));

Select rows with rowkey less than or equal to row010

Filter filter1 = new RowFilter(CompareFilter.CompareOp.LESS_OR_EQUAL,new BinaryComparator("row010".getBytes()));

1.2 FamilyFilter (ditto)

1.3 QualifierFilter (ditto)-------When listed as numbers, doesn't it work? why--------

1.4 ValueFilter (ditto)

1.5 DependentColumnFilter To be continued!

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