com.akiban.sql.parser
Class FromBaseTable

java.lang.Object
  com.akiban.sql.parser.QueryTreeNode
      com.akiban.sql.parser.ResultSetNode
          com.akiban.sql.parser.FromTable
              com.akiban.sql.parser.FromBaseTable

All Implemented Interfaces:

Visitable

public class FromBaseTable
extends FromTable

A FromBaseTable represents a table in the FROM list of a DML statement, as distinguished from a FromSubquery, which represents a subquery in the FROM list. A FromBaseTable may actually represent a view. During parsing, we can't distinguish views from base tables. During binding, when we find FromBaseTables that represent views, we replace them with FromSubqueries. By the time we get to code generation, all FromSubqueries have been eliminated, and all FromBaseTables will represent only true base tables.

Positioned Update: Currently, all columns of an updatable cursor are selected to deal with a positioned update. This is because we don't know what columns will ultimately be needed from the UpdateNode above us. For example, consider:

 get c as 'select cint from t for update of ctinyint'
  update t set ctinyint = csmallint

 

Ideally, the cursor only selects cint. Then, something akin to an IndexRowToBaseRow is generated to take the CursorResultSet and get the appropriate columns out of the base table from the RowLocation retunrned by the cursor. Then the update node can generate the appropriate NormalizeResultSet (or whatever else it might need) to get things into the correct format for the UpdateResultSet. See CurrentOfNode for more information.

Nested Class Summary

static class

FromBaseTable.UpdateOrDelete

Field Summary

Fields inherited from class com.akiban.sql.parser.FromTable

correlationName, origTableName, tableProperties

Fields inherited from class com.akiban.sql.parser.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

FromBaseTable()

Method Summary

void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
String	getExposedName() Get the exposed name for this table, which is the name that can be used to refer to it in the rest of the query.
TableName	getExposedTableName() Get the exposed table name for this table, which is the name that can be used to refer to it in the rest of the query.
IndexHintList	getIndexHints()
TableName	getTableName() Return the table name for this table.
void	init(Object arg1, Object arg2, Object arg3) Initializer for a table in a DELETE/ UPDATE.
void	init(Object arg1, Object arg2, Object arg3, Object arg4, Object arg5) Initializer for a table in a FROM list.
void	printSubNodes(int depth) Prints the sub-nodes of this object.
void	setTableProperties(Properties tableProperties) Set the table properties for this table.
String	toString() Convert this object to a String.

Methods inherited from class com.akiban.sql.parser.FromTable

getCorrelationName, getOrigTableName, init, setCorrelationName, setOrigTableName

Methods inherited from class com.akiban.sql.parser.ResultSetNode

getResultColumns, setInsertSource, setResultColumns

Methods inherited from class com.akiban.sql.parser.QueryTreeNode

accept, convertDefaultNode, debugFlush, debugPrint, formatNodeString, getBeginOffset, getDebugOutput, getEndOffset, getNodeFactory, getNodeType, getNullNode, getParserContext, getStatementType, getUserData, init, init, init, init, init, init, init, init, init, init, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FromBaseTable

public FromBaseTable()

Method Detail

init

public void init(Object arg1,
                 Object arg2,
                 Object arg3,
                 Object arg4,
                 Object arg5)

Initializer for a table in a FROM list. Parameters are as follows:

• tableName The name of the table
• correlationName The correlation name
• derivedRCL The derived column list
• tableProperties The Properties list associated with the table.

Overrides:

init in class QueryTreeNode

init

public void init(Object arg1,
                 Object arg2,
                 Object arg3)

Initializer for a table in a DELETE/ UPDATE. Parameters are as follows:

• tableName The name of the table
• correlationName The correlation name
• updateOrDelete Table is being updated/deleted from.

Overrides:

init in class QueryTreeNode

copyFrom

public void copyFrom(QueryTreeNode node)
              throws StandardException

Fill this node with a deep copy of the given node.

Overrides:

copyFrom in class FromTable

Throws:

StandardException

toString

public String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class FromTable

Returns:

This object as a String

setTableProperties

public void setTableProperties(Properties tableProperties)

Set the table properties for this table.

Parameters:

tableProperties - The new table properties.

getExposedName

public String getExposedName()

Get the exposed name for this table, which is the name that can be used to refer to it in the rest of the query.

Overrides:

getExposedName in class FromTable

Returns:

The exposed name of this table.

getExposedTableName

public TableName getExposedTableName()
                              throws StandardException

Get the exposed table name for this table, which is the name that can be used to refer to it in the rest of the query.

Returns:

TableName The exposed name of this table.

Throws:

StandardException - Thrown on error

getTableName

public TableName getTableName()
                       throws StandardException

Return the table name for this table.

Overrides:

getTableName in class FromTable

Returns:

The table name for this table.

Throws:

StandardException - Thrown on error

getIndexHints

public IndexHintList getIndexHints()

printSubNodes

public void printSubNodes(int depth)

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Overrides:

printSubNodes in class ResultSetNode

Parameters:

depth - The depth of this node in the tree