Package dev.frostlake.executor

Class VisitorExpressionBuilder

java.lang.Object

dev.frostlake.executor.VisitorExpressionBuilder

public class VisitorExpressionBuilder
extends Object

Builds and evaluates SQL expressions on behalf of SQLCommandVisitor: the procedural expression AST (buildExpression), constant / DDL-time evaluation (evaluateExpression), and the SYSTEM$ built-in family (evaluateSystemFunc). Extracted from the visitor; identifier/text and literal helpers are reached through the visitor back-reference and engine state through queryExecutor.

Method Summary

Modifier and Type	Method	Description
BaseExpression	buildExpression(FrostlakeParser.BooleanExprContext ctx)	Boolean tier (OR/AND/NOT) over the value/predicate `expression` below.
BaseExpression	buildExpression(FrostlakeParser.ExpressionContext ctx)	Build an Expression from ANTLR expression context
Object	evaluateExpression(FrostlakeParser.ExpressionContext ctx)	Simplified expression evaluation for immediate values (like DEFAULT), in a Snowflake Scripting expression context — a bare name may be a scripting variable here (a LET / := right-hand side, an IF condition, RETURN <expr>, a DECLARE … DEFAULT).
Object	evaluateSqlExpression(FrostlakeParser.ExpressionContext ctx)	Evaluate an expression that sits in an embedded SQL statement rather than in a scripting expression (a CALL argument — Snowflake dispatches CALL as SQL — or a session SET value).

Methods inherited from class java.lang.Object

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

Method Details

buildExpression

public BaseExpression buildExpression(FrostlakeParser.BooleanExprContext ctx)

Boolean tier (OR/AND/NOT) over the value/predicate `expression` below.

buildExpression

public BaseExpression buildExpression(FrostlakeParser.ExpressionContext ctx)

Build an Expression from ANTLR expression context

evaluateExpression

public Object evaluateExpression(FrostlakeParser.ExpressionContext ctx)

Simplified expression evaluation for immediate values (like DEFAULT), in a Snowflake Scripting expression context — a bare name may be a scripting variable here (a LET / := right-hand side, an IF condition, RETURN <expr>, a DECLARE … DEFAULT).

evaluateSqlExpression

public Object evaluateSqlExpression(FrostlakeParser.ExpressionContext ctx)

Evaluate an expression that sits in an embedded SQL statement rather than in a scripting expression (a CALL argument — Snowflake dispatches CALL as SQL — or a session SET value). A bare name is an identifier there, never a stored-procedure parameter / DECLAREd / LET variable: Snowflake answers invalid identifier '<NAME>' and requires the :name bind form. Session variables stay visible, as they are in Snowflake SQL.