Package org.yamcs.yarch.streamsql
Class NullExpression
java.lang.Object
org.yamcs.yarch.streamsql.Expression
org.yamcs.yarch.streamsql.NullExpression
This represents a NULL value coming from some sql expression for example: select null from x
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Field Summary
Fields inherited from class org.yamcs.yarch.streamsql.Expression
children, constantValue, hasAggregates, inputDef, type
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Method Summary
Methods inherited from class org.yamcs.yarch.streamsql.Expression
addFilter, bind, collectAggregates, collectRequiredInputs, compile, fillCode_Constructor, fillCode_Declarations, fillCode_getValueBody, fillCode_InputDefVars, getColumnName, getConstantValue, getType, isAggregate, isConstant, setArgs, setColumnName
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Method Details
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doBind
- Specified by:
doBind
in classExpression
- Throws:
StreamSqlException
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fillCode_getValueReturn
- Specified by:
fillCode_getValueReturn
in classExpression
- Throws:
StreamSqlException
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