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

Class AbstractExprWithNmspc<T extends org.antlr.v4.runtime.ParserRuleContext>

java.lang.Object

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

org.pgcodekeeper.core.parsers.antlr.pg.expr.AbstractExprWithNmspc<T>

Direct Known Subclasses:

Delete, Function, Insert, Merge, Select, Statements, Update, ValueExprWithNmspc

public abstract class AbstractExprWithNmspc<T extends org.antlr.v4.runtime.ParserRuleContext>
extends AbstractExpr

Abstract expression parser with namespace support for tracking variables, references, and CTEs.

Method Summary

Modifier and Type	Method	Description
void	addNamespaceVariable(Pair<String,String> variable)	Adds a "freestanding" variable (e.g.
void	addRawTableReference(GenericColumn qualifiedTable)
boolean	addReference(String alias, GenericColumn object)	Clients may use this to set up pseudo-variable names before expression analysis.
abstract List<ModPair<String,String>>	analyze(T ruleCtx)	Analyzes the given rule context.
void	declareNamespaceVar(String alias, String name, GenericColumn argType)	Declares a variable in the current namespace.

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

Method Details

declareNamespaceVar

public void declareNamespaceVar(String alias,
 String name,
 GenericColumn argType)

Declares a variable in the current namespace. Variables of relation types are declared as references, rest are treated as primitives.

Parameters:

alias - var alias (required)

name - var name (optional, may be null)

argType - var type

addNamespaceVariable

public void addNamespaceVariable(Pair<String,String> variable)

Adds a "freestanding" variable (e.g. a non-table function parameter) into a special complexNamespace container.

addReference

public boolean addReference(String alias,
 GenericColumn object)

Clients may use this to set up pseudo-variable names before expression analysis.

addRawTableReference

public void addRawTableReference(GenericColumn qualifiedTable)

analyze

public abstract List<ModPair<String,String>> analyze(T ruleCtx)

Analyzes the given rule context.

Parameters:

ruleCtx - the parser rule context to analyze

Returns:

list of modifiable pairs containing analyzed results