fix(sql): handle nested GaussDB procedure blocks

apps/desktop/src/lib/__tests__/sql/sqlStatementRanges.spec.ts

@@ -71,6 +71,15 @@ BEGIN
    SELECT 1 + 2 INTO PRE_TRD_DATE FROM DUAL;
 END;`;
 
+const gaussDbNestedProcedure = `CREATE OR REPLACE PROCEDURE public.dbx_issue_4318()
+AS
+BEGIN
+  BEGIN
+    NULL;
+  END;
+  NULL;
+END;`;
+
 const mysqlRoutineFixture = `CREATE PROCEDURE p()
 BEGIN
   SELECT 1;
@@ -210,6 +219,10 @@ describe("splitSqlStatementRanges", () => {
     expect(rangeSqlTexts(splitSqlStatementRanges(oracleIssue2405PlSql, "oracle"))).toEqual([oracleIssue2405PlSql]);
   });
 
+  it("keeps nested GaussDB procedure blocks together", () => {
+    expect(rangeSqlTexts(splitSqlStatementRanges(gaussDbNestedProcedure, "gaussdb"))).toEqual([gaussDbNestedProcedure]);
+  });
+
   it("keeps SAP HANA DO blocks together", () => {
     const ranges = splitSqlStatementRanges(sapHanaDoBlockFixture, "saphana");
 
@@ -720,6 +733,11 @@ WHERE request_json LIKE '%"paperFlag":null%';`;
     }
   });
 
+  it("returns the full GaussDB procedure for cursors after a nested block", () => {
+    const outerNull = indexOf(gaussDbNestedProcedure, "NULL;", 2);
+    expect(statementRangeAtCursor(gaussDbNestedProcedure, outerNull, "gaussdb")?.sql.trim()).toBe(gaussDbNestedProcedure);
+  });
+
   it("returns the full SAP HANA DO block for cursors inside nested statements", () => {
     const range = statementRangeAtCursor(sapHanaDoBlockFixture, indexOf(sapHanaDoBlockFixture, "Result"), "saphana");
 

apps/desktop/src/lib/sql/sqlStatementRanges.ts

@@ -1669,14 +1669,15 @@ function oraclePlSqlBlockIsComplete(sql: string): boolean {
     if (token.kind !== "word") continue;
 
     if (token.value === "DECLARE") {
-      stack.push("BLOCK");
+      stack.push("DECLARATION");
       continue;
     }
     if (token.value === "BEGIN") {
       if (tokens[index - 1]?.kind === "word" && tokens[index - 1]?.value === "TRANSACTION") continue;
       const previous = previousWordToken(tokens, index);
       if (previous === "END") continue;
-      if (stack[stack.length - 1] !== "BLOCK") stack.push("BLOCK");
+      if (stack[stack.length - 1] === "DECLARATION") stack[stack.length - 1] = "BLOCK";
+      else stack.push("BLOCK");
       continue;
     }
     if (token.value === "IF") {