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perf: cut the lookahead scans in ComplexExpressionList #2876

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Merged
manticore-projects merged 1 commit into from
Oct 29, 2026
Merged

perf: cut the lookahead scans in ComplexExpressionList #2876

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11 changes: 6 additions & 5 deletions src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt
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Original file line number Diff line number Diff line change
Expand Up @@ -12783,11 +12783,11 @@ ExpressionList SimpleExpressionList():
{
expr=SimpleExpression() { expressions.add(expr); }
(
LOOKAHEAD(2, {!interrupted} ) ","
LOOKAHEAD({ !interrupted && getToken(1).kind == K_COMMA }) ","
(
LOOKAHEAD( RelObjectName() "->", { !isJsonArrowDialect() } ) expr=LambdaExpression()
|
expr=SimpleExpression()
LOOKAHEAD({ !interrupted }) expr=SimpleExpression()
)
{
expressions.add(expr);
Expand Down Expand Up @@ -12835,22 +12835,23 @@ ExpressionList ComplexExpressionList():
|
LOOKAHEAD(2, { isNamedParameterAssignmentAhead() }) expr=PostgresNamedFunctionParameter()
|
expr=Expression()
// JavaCC scans an unguarded alternative's first token; a semantic-only lookahead enters directly
LOOKAHEAD({ !interrupted }) expr=Expression()
)
{
expressions.add(expr);
}

(
LOOKAHEAD(2, {!interrupted}) ","
LOOKAHEAD({ !interrupted && getToken(1).kind == K_COMMA }) ","
(
LOOKAHEAD(2, { isNamedParameterAssignmentAhead() }) expr=OracleNamedFunctionParameter()
|
LOOKAHEAD(2, { isNamedParameterAssignmentAhead() }) expr=PostgresNamedFunctionParameter()
|
LOOKAHEAD( RelObjectName() "->", { !isJsonArrowDialect() } ) expr=LambdaExpression()
|
expr=Expression()
LOOKAHEAD({ !interrupted }) expr=Expression()
) { expressions.add(expr); }
)*

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