Apache Impala SQL Parser for Java and .NET

Example

Apache Impala SQL that GSP parses

COMPUTE STATS sales_data;
DROP TABLE staging_sales PURGE;

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());
}

The .NET edition exposes the same API in C# — see the C# quick start.

Coverage

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.

Actively maintained

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.