Package com.mckoi.database
Class QueryPlan.FetchTableNode
- java.lang.Object
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- com.mckoi.database.QueryPlan.FetchTableNode
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- All Implemented Interfaces:
QueryPlanNode
,java.io.Serializable
,java.lang.Cloneable
- Enclosing class:
- QueryPlan
public static class QueryPlan.FetchTableNode extends java.lang.Object implements QueryPlanNode
The node for fetching a table from the current transaction. This is a tree node and has no children.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description FetchTableNode(TableName table_name, TableName aliased_as)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
clone()
Deep clones this query plan.void
debugString(int level, java.lang.StringBuffer buf)
Writes a textural representation of the node to the StringBuffer at the given indent level.java.util.ArrayList
discoverCorrelatedVariables(int level, java.util.ArrayList list)
Discovers all the correlated variables in the plan (and plan children) that reference a particular layer.java.util.ArrayList
discoverTableNames(java.util.ArrayList list)
Adds the table name to the list if it's not already in there.Table
evaluate(QueryContext context)
Evaluates the node and returns the result as a Table.java.lang.String
titleString()
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Method Detail
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discoverTableNames
public java.util.ArrayList discoverTableNames(java.util.ArrayList list)
Adds the table name to the list if it's not already in there.- Specified by:
discoverTableNames
in interfaceQueryPlanNode
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evaluate
public Table evaluate(QueryContext context)
Description copied from interface:QueryPlanNode
Evaluates the node and returns the result as a Table. The VariableResolver resolves any outer variables- Specified by:
evaluate
in interfaceQueryPlanNode
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discoverCorrelatedVariables
public java.util.ArrayList discoverCorrelatedVariables(int level, java.util.ArrayList list)
Description copied from interface:QueryPlanNode
Discovers all the correlated variables in the plan (and plan children) that reference a particular layer. For example, if we wanted to find all the CorrelatedVariable objects that reference the current layer, we would typically call 'discoverCorrelatedVariables(0, new ArrayList())'- Specified by:
discoverCorrelatedVariables
in interfaceQueryPlanNode
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clone
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
Description copied from interface:QueryPlanNode
Deep clones this query plan.- Specified by:
clone
in interfaceQueryPlanNode
- Overrides:
clone
in classjava.lang.Object
- Throws:
java.lang.CloneNotSupportedException
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titleString
public java.lang.String titleString()
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debugString
public void debugString(int level, java.lang.StringBuffer buf)
Description copied from interface:QueryPlanNode
Writes a textural representation of the node to the StringBuffer at the given indent level.- Specified by:
debugString
in interfaceQueryPlanNode
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