Package com.mckoi.database.interpret
Class TableSelectExpression
- java.lang.Object
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- com.mckoi.database.interpret.TableSelectExpression
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- All Implemented Interfaces:
StatementTreeObject
,java.io.Serializable
,java.lang.Cloneable
public final class TableSelectExpression extends java.lang.Object implements java.io.Serializable, StatementTreeObject, java.lang.Cloneable
A container object for the a table select expression, eg.SELECT [columns] FROM [tables] WHERE [search_clause] GROUP BY [column] HAVING [search_clause] [composite_function] [table_select_expression]
Note that a TableSelectExpression can be nested in the various clauses of this object.
- Author:
- Tobias Downer
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description java.util.ArrayList
columns
The list of columns to select from.boolean
distinct
True if we only search for distinct elements.FromClause
from_clause
The from clause.java.util.ArrayList
group_by
The list of columns to group by.Variable
group_max
The group max variable or null if no group max.SearchExpression
having_clause
The having clause.SearchExpression
where_clause
The where clause.
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Constructor Summary
Constructors Constructor Description TableSelectExpression()
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
chainComposite(TableSelectExpression expression, java.lang.String composite, boolean is_all)
Chains a new composite function to this expression.java.lang.Object
clone()
Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members.void
prepareExpressions(ExpressionPreparer preparer)
Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.
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Field Detail
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distinct
public boolean distinct
True if we only search for distinct elements.
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columns
public java.util.ArrayList columns
The list of columns to select from. (SelectColumn)
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from_clause
public FromClause from_clause
The from clause.
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where_clause
public SearchExpression where_clause
The where clause.
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group_by
public java.util.ArrayList group_by
The list of columns to group by. (ByColumn)
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group_max
public Variable group_max
The group max variable or null if no group max.
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having_clause
public SearchExpression having_clause
The having clause.
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Method Detail
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chainComposite
public void chainComposite(TableSelectExpression expression, java.lang.String composite, boolean is_all)
Chains a new composite function to this expression. For example, if this expression is a UNION ALL with another expression it would be set through this method.
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prepareExpressions
public void prepareExpressions(ExpressionPreparer preparer) throws DatabaseException
Description copied from interface:StatementTreeObject
Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.- Specified by:
prepareExpressions
in interfaceStatementTreeObject
- Throws:
DatabaseException
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clone
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
Description copied from interface:StatementTreeObject
Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members. If the object is immutable then it may return 'this'.- Specified by:
clone
in interfaceStatementTreeObject
- Overrides:
clone
in classjava.lang.Object
- Throws:
java.lang.CloneNotSupportedException
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