From 34f6017798aa187e2e37a09b375faa316af1f397 Mon Sep 17 00:00:00 2001
From: taozhi8833998 <taozhi8833998@163.com>
Date: Sat, 10 Feb 2024 10:19:24 +0800
Subject: [PATCH] feat: support cross and outer apply in tsql

---
 pegjs/transactsql.pegjs  | 5 ++++-
 test/transactsql.spec.js | 7 +++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/pegjs/transactsql.pegjs b/pegjs/transactsql.pegjs
index 3d9ee42a..f7bc2473 100644
--- a/pegjs/transactsql.pegjs
+++ b/pegjs/transactsql.pegjs
@@ -13,6 +13,7 @@
     'CALL': true,
     'CASE': true,
     'CREATE': true,
+    'CROSS': true,
     'CONTAINS': true,
     'CURRENT_DATE': true,
     'CURRENT_TIME': true,
@@ -1707,7 +1708,8 @@ table_base
 
 join_op
   = a:(KW_LEFT / KW_RIGHT / KW_FULL) __ s:KW_OUTER? __ KW_JOIN { return [a[0].toUpperCase(), s && s[0], 'JOIN'].filter(v => v).join(' '); }
-  / KW_CROSS __ KW_JOIN { return 'CROSS JOIN' }
+  / KW_CROSS __ j:(KW_JOIN / KW_APPLY) { return `CROSS ${j[0].toUpperCase()}` }
+  / a:KW_OUTER __ KW_APPLY { return 'OUTER APPLY' }
   / a:(KW_INNER)? __ KW_JOIN { return a ? 'INNER JOIN' : 'JOIN' }
 
 table_name
@@ -2798,6 +2800,7 @@ KW_FULL     = "FULL"i     !ident_start
 KW_INNER    = "INNER"i    !ident_start
 KW_CROSS    = "CROSS"i    !ident_start
 KW_JOIN     = "JOIN"i     !ident_start
+KW_APPLY    = "APPLY"i     !ident_start
 KW_OUTER    = "OUTER"i    !ident_start
 KW_OVER     = "OVER"i     !ident_start
 KW_UNION    = "UNION"i    !ident_start
diff --git a/test/transactsql.spec.js b/test/transactsql.spec.js
index 370c0072..47e121c0 100644
--- a/test/transactsql.spec.js
+++ b/test/transactsql.spec.js
@@ -283,6 +283,13 @@ describe('transactsql', () => {
     sql = [base, 'for xml path(\'\')'].join('\n')
     expect(getParsedSql(sql)).to.be.equal(`${sqlfiyBase} FOR XML PATH('')`)
   })
+  it('should support cross and outer apply', () => {
+    const applies = ['cross', 'outer']
+    for (const apply of applies) {
+      const sql = `SELECT SampleParentTable.SampleColumn, SUB.SampleColumn FROM SampleParentTable ${apply} APPLY (SELECT TOP 1 SampleColumn FROM SampleChildTable) SUB`
+      expect(getParsedSql(sql)).to.be.equal(`SELECT [SampleParentTable].[SampleColumn], [SUB].[SampleColumn] FROM [SampleParentTable] ${apply.toUpperCase()} APPLY (SELECT TOP 1 [SampleColumn] FROM [SampleChildTable]) AS [SUB]`)
+    }
+  })
   describe('if else', () => {
     it('should support if only statement', () => {
       const sql = `IF EXISTS(SELECT 1 from sys.views where name='MyView' and type='v')