diff --git a/pegjs/bigquery.pegjs b/pegjs/bigquery.pegjs
index 00b43206..3fb0077c 100644
--- a/pegjs/bigquery.pegjs
+++ b/pegjs/bigquery.pegjs
@@ -1800,7 +1800,7 @@ column_list_item
 
 alias_clause
   = KW_AS __ i:alias_ident { return i; }
-  / KW_AS? __ i:ident { return i; }
+  / KW_AS? __ i:column { return i; }
 
 from_unnest_item
   = 'UNNEST'i __ LPAREN __ a:expr? __ RPAREN __ alias:alias_clause? __ wf:with_offset? {
@@ -2485,7 +2485,7 @@ ident
     }
 
 alias_ident
-  = name:ident_name !{
+  = name:column_name !{
       if (reservedMap[name.toUpperCase()] === true) throw new Error("Error: "+ JSON.stringify(name)+" is a reserved word, can not as alias clause");
       return false
     } {
@@ -2548,7 +2548,7 @@ ident_start = [A-Za-z_]
 ident_part  = [A-Za-z0-9_-]
 
 // to support column name like `cf1:name` in hbase
-column_part  = [A-Za-z0-9_:-]
+column_part  = [A-Za-z0-9_:]
 
 param
   = s:(':'/'@') n:ident_name {
diff --git a/pegjs/postgresql.pegjs b/pegjs/postgresql.pegjs
index 05a956cb..769287e7 100644
--- a/pegjs/postgresql.pegjs
+++ b/pegjs/postgresql.pegjs
@@ -4405,7 +4405,7 @@ ident_list
       return createList(head, tail)
     }
 alias_ident
-  = name:ident_name !{ return reservedMap[name.toUpperCase()] === true } c:(__ LPAREN __ column_list __ RPAREN)? {
+  = name:column_name !{ return reservedMap[name.toUpperCase()] === true } c:(__ LPAREN __ column_list __ RPAREN)? {
       // => string
       if (!c) return name;
       return `${name}(${c[3].map(v => v.value).join(', ')})`
diff --git a/pegjs/redshift.pegjs b/pegjs/redshift.pegjs
index d5a3cddc..787a5de1 100644
--- a/pegjs/redshift.pegjs
+++ b/pegjs/redshift.pegjs
@@ -4074,7 +4074,7 @@ ident_list
       return createList(head, tail)
     }
 alias_ident
-  = name:ident_name !{ return reservedMap[name.toUpperCase()] === true } c:(__ LPAREN __ column_list __ RPAREN)? {
+  = name:column_name !{ return reservedMap[name.toUpperCase()] === true } c:(__ LPAREN __ column_list __ RPAREN)? {
       // => string
       if (!c) return name;
       return `${name}(${c[3].map(v => v.value).join(', ')})`
diff --git a/pegjs/snowflake.pegjs b/pegjs/snowflake.pegjs
index 09dcaf37..02f898cf 100644
--- a/pegjs/snowflake.pegjs
+++ b/pegjs/snowflake.pegjs
@@ -2277,8 +2277,8 @@ value_alias_clause
   = KW_AS? __ i:alias_ident { /*=>alias_ident*/ return i; }
 
 alias_clause
-  = KW_AS __ i:ident_without_kw { /*=>alias_ident*/ return i; }
-  / KW_AS? __ i:ident { /*=>ident*/ return i; }
+  = KW_AS __ i:column_without_kw { /*=>alias_ident*/ return i; }
+  / KW_AS? __ i:column { /*=>ident*/ return i; }
 
 into_clause
   = KW_INTO __ v:var_decl_list {
diff --git a/test/postgres.spec.js b/test/postgres.spec.js
index dbdad739..c00aad79 100644
--- a/test/postgres.spec.js
+++ b/test/postgres.spec.js
@@ -1602,6 +1602,13 @@ describe('Postgres', () => {
         'CREATE TABLE "User" ("gender" "Gender" NOT NULL)',
       ]
     },
+    {
+      title: 'no space before line comment',
+      sql: [
+        'select * from model_a a-- comment',
+        'SELECT * FROM "model_a" AS "a"'
+      ]
+    },
   ]
   function neatlyNestTestedSQL(sqlList){
     sqlList.forEach(sqlInfo => {
diff --git a/test/redshift.spec.js b/test/redshift.spec.js
index fe36082b..38e98a70 100644
--- a/test/redshift.spec.js
+++ b/test/redshift.spec.js
@@ -37,4 +37,9 @@ describe('redshift', () => {
     expect(getParsedSql(sql)).to.be.equal('SELECT * FROM "montara_raw"."raw_listings" WHERE price = -minimum_nights')
   })
 
+  it('should support no space before line comment', () => {
+    const sql = 'select * from model_a a-- comment'
+    expect(getParsedSql(sql)).to.be.equal('SELECT * FROM "model_a" AS "a"')
+  })
+
 })
\ No newline at end of file