Package org.pgcodekeeper.core.parsers.antlr.pg.expr

Class ValueExpr

java.lang.Object

org.pgcodekeeper.core.parsers.antlr.pg.expr.AbstractExpr

org.pgcodekeeper.core.parsers.antlr.pg.expr.ValueExpr

public final class ValueExpr
extends AbstractExpr

Parser for value expressions with namespace support.

Constructor Summary

Constructors

Constructor	Description
ValueExpr(MetaContainer meta)	Creates a ValueExpr parser with meta container.

Method Summary

Modifier and Type	Method	Description
ModPair<String,String>	analyze(Vex vex)	Analyzes a value expression and returns its type information.
ModPair<String,String>	function(SQLParser.Function_callContext function)	Analyzes a function call and returns its type information.
void	orderBy(SQLParser.Orderby_clauseContext orderBy)	Processes an ORDER BY clause.
void	window(SQLParser.Window_definitionContext window)	Processes a WINDOW definition.

Methods inherited from class org.pgcodekeeper.core.parsers.antlr.pg.expr.AbstractExpr

getDepcies, setFullAnaLyze

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ValueExpr

public ValueExpr(MetaContainer meta)

Creates a ValueExpr parser with meta container.

Parameters:

meta - the meta container with schema information

Method Details

analyze

public ModPair<String,String> analyze(Vex vex)

Analyzes a value expression and returns its type information.

Alternative checks are ordered for performance according to their usage frequency in real code. Statistics gathered on the internal DB codebase as of 2019-10-16. Also note that some checks are constrained by the grammar to go before others. Otherwise, some alternatives would be mis-processed as a wrong kind.

function

public ModPair<String,String> function(SQLParser.Function_callContext function)

Analyzes a function call and returns its type information.

Parameters:

function - the function call context to analyze

Returns:

pair containing the function name and return type

orderBy

public void orderBy(SQLParser.Orderby_clauseContext orderBy)

Processes an ORDER BY clause.

Parameters:

orderBy - the ORDER BY clause context

window

public void window(SQLParser.Window_definitionContext window)

Processes a WINDOW definition.

Parameters:

window - the WINDOW definition context