Merge PR #281: Fix BigQuery STRUCT formatting

Author: nene

src/languages/bigquery.formatter.ts

@@ -892,9 +892,9 @@ function combineParameterizedTypes(tokens: Token[]) {
       const endIndex = findClosingAngleBracketIndex(tokens, i + 1);
       const typeDefTokens = tokens.slice(i, endIndex + 1);
       processed.push({
-        ...token,
-        value: typeDefTokens.map(t => t.value).join(''),
-        text: typeDefTokens.map(t => t.text).join(''),
+        type: TokenType.IDENT,
+        value: typeDefTokens.map(formatTypeDefToken('value')).join(''),
+        text: typeDefTokens.map(formatTypeDefToken('text')).join(''),
       });
       i = endIndex;
     } else {
@@ -904,6 +904,16 @@ function combineParameterizedTypes(tokens: Token[]) {
   return processed;
 }
 
+const formatTypeDefToken =
+  (key: 'text' | 'value') =>
+  (token: Token): string => {
+    if (token.type === TokenType.IDENT || token.value === ',') {
+      return token[key] + ' ';
+    } else {
+      return token[key];
+    }
+  };
+
 function findClosingAngleBracketIndex(tokens: Token[], startIndex: number): number {
   let level = 0;
   for (let i = startIndex; i < tokens.length; i++) {

test/bigquery.test.ts

@@ -121,6 +121,35 @@ describe('BigQueryFormatter', () => {
     `);
   });
 
+  // Issue #279
+  it('supports parametric STRUCT with named fields', () => {
+    expect(format('SELECT STRUCT<y INT64, z STRING>(1,"foo"), STRUCT<arr ARRAY<INT64>>([1,2,3]);'))
+      .toBe(dedent`
+      SELECT
+        STRUCT<y INT64, z STRING>(1, "foo"),
+        STRUCT<arr ARRAY<INT64>>([1, 2, 3]);
+    `);
+  });
+
+  it('supports uppercasing of STRUCT', () => {
+    expect(format('select struct<Nr int64, myName string>(1,"foo");', { keywordCase: 'upper' }))
+      .toBe(dedent`
+      SELECT
+        STRUCT<Nr INT64, myName STRING>(1, "foo");
+    `);
+  });
+
+  // XXX: This is hard to achieve with our current type-parameter processing hack.
+  // At least we're preserving the case of identifier names here,
+  // and lowercasing is luckily less used than uppercasing.
+  it('does not support lowercasing of STRUCT', () => {
+    expect(format('SELECT STRUCT<Nr INT64, myName STRING>(1,"foo");', { keywordCase: 'lower' }))
+      .toBe(dedent`
+      select
+        STRUCT<Nr INT64, myName STRING>(1, "foo");
+    `);
+  });
+
   it('supports parameterised types', () => {
     const result = format(
       `