Package com.mckoi.database.interpret
Class FromTableDef
- java.lang.Object
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- com.mckoi.database.interpret.FromTableDef
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
public final class FromTableDef extends java.lang.Object implements java.io.Serializable, java.lang.Cloneable
Describes a single table declaration in the from clause of a table expression (SELECT).- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description (package private) static long
serialVersionUID
private boolean
subquery_table
If this is true, then the table def represents a sub-query table.private TableSelectExpression
subselect_table
The TableSelectExpression if this is a subquery table.private java.lang.String
table_alias
The alias of the table or null if no alias was defined.private java.lang.String
table_name
The name of the table this definition references.private java.lang.String
unique_key
The unique key name given to this table definition.
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Constructor Summary
Constructors Constructor Description FromTableDef(TableSelectExpression select)
A simple sub-query table definition (not aliased).FromTableDef(TableSelectExpression select, java.lang.String table_alias)
A table that is a sub-query and given an aliased name.FromTableDef(java.lang.String table_name)
A simple table definition (not aliased).FromTableDef(java.lang.String table_name, java.lang.String table_alias)
Constructs the table def.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
clone()
Clones the object (deep clone of immutable members).java.lang.String
getAlias()
Returns the alias for this table (or null if no alias given).java.lang.String
getName()
Returns the name of the table.TableSelectExpression
getTableSelectExpression()
Returns the TableSelectExpression if this is a subquery table.java.lang.String
getUniqueKey()
Returns the unique key.boolean
isSubQueryTable()
Returns true if this item in the FROM clause is a subquery table.void
prepareExpressions(ExpressionPreparer preparer)
Prepares the expressions in this table def.void
setUniqueKey(java.lang.String unique_key)
Sets the unique key.
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Field Detail
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serialVersionUID
static final long serialVersionUID
- See Also:
- Constant Field Values
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subquery_table
private boolean subquery_table
If this is true, then the table def represents a sub-query table. The 'getSubSelectStatement' and 'getAlias' method can be used to get the table information.eg. FROM ( SELECT id, number FROM Part ) AS part_info, ....
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unique_key
private java.lang.String unique_key
The unique key name given to this table definition.
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table_name
private java.lang.String table_name
The name of the table this definition references.
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table_alias
private java.lang.String table_alias
The alias of the table or null if no alias was defined.
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subselect_table
private TableSelectExpression subselect_table
The TableSelectExpression if this is a subquery table.
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Constructor Detail
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FromTableDef
public FromTableDef(java.lang.String table_name, java.lang.String table_alias)
Constructs the table def. The constructs a table that is aliased under a different name.
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FromTableDef
public FromTableDef(java.lang.String table_name)
A simple table definition (not aliased).
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FromTableDef
public FromTableDef(TableSelectExpression select, java.lang.String table_alias)
A table that is a sub-query and given an aliased name.
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FromTableDef
public FromTableDef(TableSelectExpression select)
A simple sub-query table definition (not aliased).
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Method Detail
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setUniqueKey
public void setUniqueKey(java.lang.String unique_key)
Sets the unique key.
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getName
public java.lang.String getName()
Returns the name of the table.
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getAlias
public java.lang.String getAlias()
Returns the alias for this table (or null if no alias given).
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getUniqueKey
public java.lang.String getUniqueKey()
Returns the unique key.
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isSubQueryTable
public boolean isSubQueryTable()
Returns true if this item in the FROM clause is a subquery table.
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getTableSelectExpression
public TableSelectExpression getTableSelectExpression()
Returns the TableSelectExpression if this is a subquery table.
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prepareExpressions
public void prepareExpressions(ExpressionPreparer preparer) throws DatabaseException
Prepares the expressions in this table def.- Throws:
DatabaseException
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clone
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
Clones the object (deep clone of immutable members).- Overrides:
clone
in classjava.lang.Object
- Throws:
java.lang.CloneNotSupportedException
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