Class ExpressionContext
- java.lang.Object
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- org.apache.pinot.common.request.context.ExpressionContext
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public class ExpressionContext extends Object
TheExpressionContextclass represents an expression in the query.The expression can be a LITERAL (e.g. 1, "abc"), an IDENTIFIER (e.g. memberId, timestamp), or a FUNCTION (e.g. SUM(price), ADD(foo, bar)).
Currently the query engine processes all literals as strings, so we store literals in string format (1 is stored as "1").
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Nested Class Summary
Nested Classes Modifier and Type Class Description static classExpressionContext.Type
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanequals(Object o)static ExpressionContextforFunction(FunctionContext function)static ExpressionContextforIdentifier(String identifier)static ExpressionContextforLiteral(String literal)voidgetColumns(Set<String> columns)Adds the columns (IDENTIFIER expressions) in the expression to the given set.FunctionContextgetFunction()StringgetIdentifier()StringgetLiteral()ExpressionContext.TypegetType()inthashCode()StringtoString()
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Method Detail
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forLiteral
public static ExpressionContext forLiteral(String literal)
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forIdentifier
public static ExpressionContext forIdentifier(String identifier)
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forFunction
public static ExpressionContext forFunction(FunctionContext function)
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getType
public ExpressionContext.Type getType()
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getLiteral
public String getLiteral()
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getIdentifier
public String getIdentifier()
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getFunction
public FunctionContext getFunction()
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getColumns
public void getColumns(Set<String> columns)
Adds the columns (IDENTIFIER expressions) in the expression to the given set.
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