Apache Impala SQL Parser for Java and .NET

Apache Impala SQL that GSP parses

ALTER TABLE sales_data ADD PARTITION (year=2026, month=7);

Parse it in Java

import gudusoft.gsqlparser.*;

TGSqlParser parser = new TGSqlParser(EDbVendor.dbvimpala);
parser.sqltext = sql; // the Apache Impala SQL above
if (parser.parse() == 0) {
    System.out.println(parser.sqlstatements.size() + " statement(s) parsed");
} else {
    System.out.println(parser.getErrormessage());
}

Parse it in C#

using gudusoft.gsqlparser;

TGSqlParser parser = new TGSqlParser(EDbVendor.dbvimpala);
parser.sqltext = sql; // the Apache Impala SQL above
if (parser.parse() == 0)
{
    Console.WriteLine(parser.sqlstatements.size() + " statement(s) parsed");
}
else
{
    Console.WriteLine(parser.Errormessage);
}

Same grammar, .NET-idiomatic API — properties instead of Java getters. See the C# quick start or the .NET SQL Parser SDK.

What GSP handles in Apache Impala

• COMPUTE STATS
• PRIMARY/FOREIGN KEY in CREATE TABLE
• DROP TABLE ... PURGE
• External tables

Beyond parsing, the same AST powers table/column extraction, validation, formatting, and column-level lineage for Apache Impala.

Recent Apache Impala parser updates

• 2026-06-02 [Impala] Parse PRIMARY KEY / FOREIGN KEY in CREATE TABLE
• 2026-06-02 [Impala] Attach ON condition to LEFT [OUTER] JOIN
• 2026-02-20 [Impala] Add PURGE keyword support for DROP TABLE

Full history in the release notes.