Package com.tangosol.coherence.dslquery.token

Class SQLExplainOPToken

java.lang.Object

com.tangosol.coherence.dsltools.precedence.OPToken

com.tangosol.coherence.dsltools.precedence.IdentifierOPToken

com.tangosol.coherence.dslquery.token.SQLOPToken

com.tangosol.coherence.dslquery.token.SQLExplainOPToken

Direct Known Subclasses:

SQLTraceOPToken

public class SQLExplainOPToken
extends SQLOPToken

SQLExplainOPToken is used for parsing and specifying the AST used for an explain plan statement.

Syntax:

EXPLAIN PLAN FOR select stmt | update stmt | delete stmt

Author:

tb 2011.06.05

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FUNCTOR	The functor name used to represent this node in an AST

Fields inherited from class com.tangosol.coherence.dsltools.precedence.OPToken

BINARY_OPERATOR_NODE, BINDING_NODE, CALL_NODE, DEREF_NODE, FIELD_LIST, IDENTIFIER_NODE, LIST_NODE, LITERAL_NODE, m_nBindingPower, m_sLedASTName, m_sNudASTName, m_sValue, PRECEDENCE_ASSIGNMENT, PRECEDENCE_BITWISE, PRECEDENCE_EXPONENT, PRECEDENCE_IDENTIFIER, PRECEDENCE_KEYWORD, PRECEDENCE_LOGICAL, PRECEDENCE_LOGICAL_BITWISE, PRECEDENCE_PARENTHESES, PRECEDENCE_PRODUCT, PRECEDENCE_RELATIONAL, PRECEDENCE_SUM, PRECEDENCE_UNARY, PRECEDENCE_UNARY_POST, UNARY_OPERATOR_NODE

Constructor Summary

Constructors

Constructor	Description
SQLExplainOPToken(String id)	Construct a new SQLExplainOPToken with the given parameters.

Method Summary

Modifier and Type	Method	Description
protected void	advanceToStmt(OPScanner s)	Advance the scanner past any tokens preceding the statement.
protected String	getFunctor()	Get the functor for the new term.
Term	nud(OPParser parser)	Process this token in the context of parser p with the null denotation.

Methods inherited from class com.tangosol.coherence.dslquery.token.SQLOPToken

checkAlias

Methods inherited from class com.tangosol.coherence.dsltools.precedence.IdentifierOPToken

led

Methods inherited from class com.tangosol.coherence.dsltools.precedence.OPToken

equals, getBindingPower, getId, getLedASTName, getNudASTName, getValue, hashCode, leftBindingPower, newAST, newAST, newAST, newAST, newAST, setBindingPower, setId, setLedASTName, setNudASTName, setValue, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

FUNCTOR

public static final String FUNCTOR

The functor name used to represent this node in an AST

See Also:

• Constant Field Values

Constructor Details

SQLExplainOPToken

public SQLExplainOPToken(String id)

Construct a new SQLExplainOPToken with the given parameters.

Parameters:

id - string identifier for this token

Method Details

nud

public Term nud(OPParser parser)

Description copied from class: IdentifierOPToken

Process this token in the context of parser p with the null denotation. A nud method typically will have no interest in the token to the left. The processing results in an Abstract Syntax Tree Node that captures the meaning

Overrides:

nud in class IdentifierOPToken

Parameters:

parser - the parser that is the context for parsing

Returns:

an AstNode

advanceToStmt

protected void advanceToStmt(OPScanner s)

Advance the scanner past any tokens preceding the statement.

Parameters:

s - the scanner

getFunctor

protected String getFunctor()

Get the functor for the new term.

Returns:

the functor