set: allow dots in variables by moving to ObjectName (#484)

Signed-off-by: Maciej Obuchowski <obuchowski.maciej@gmail.com>

src/ast/mod.rs

@@ -921,7 +921,7 @@ pub enum Statement {
     SetVariable {
         local: bool,
         hivevar: bool,
-        variable: Ident,
+        variable: ObjectName,
         value: Vec<SetVariableValue>,
     },
     /// SHOW <variable>

src/parser.rs

@@ -3266,7 +3266,7 @@ impl<'a> Parser<'a> {
             });
         }
 
-        let variable = self.parse_identifier()?;
+        let variable = self.parse_object_name()?;
         if self.consume_token(&Token::Eq) || self.parse_keyword(Keyword::TO) {
             let mut values = vec![];
             loop {
@@ -3287,14 +3287,14 @@ impl<'a> Parser<'a> {
                     value: values,
                 });
             }
-        } else if variable.value == "CHARACTERISTICS" {
+        } else if variable.to_string() == "CHARACTERISTICS" {
             self.expect_keywords(&[Keyword::AS, Keyword::TRANSACTION])?;
             Ok(Statement::SetTransaction {
                 modes: self.parse_transaction_modes()?,
                 snapshot: None,
                 session: true,
             })
-        } else if variable.value == "TRANSACTION" && modifier.is_none() {
+        } else if variable.to_string() == "TRANSACTION" && modifier.is_none() {
             if self.parse_keyword(Keyword::SNAPSHOT) {
                 let snaphot_id = self.parse_value()?;
                 return Ok(Statement::SetTransaction {

tests/sqlparser_postgres.rs

@@ -18,6 +18,7 @@
 mod test_utils;
 use test_utils::*;
 
+use sqlparser::ast::Value::Boolean;
 use sqlparser::ast::*;
 use sqlparser::dialect::{GenericDialect, PostgreSqlDialect};
 use sqlparser::parser::ParserError;
@@ -780,7 +781,7 @@ fn parse_set() {
         Statement::SetVariable {
             local: false,
             hivevar: false,
-            variable: "a".into(),
+            variable: ObjectName(vec![Ident::new("a")]),
             value: vec![SetVariableValue::Ident("b".into())],
         }
     );
@@ -791,7 +792,7 @@ fn parse_set() {
         Statement::SetVariable {
             local: false,
             hivevar: false,
-            variable: "a".into(),
+            variable: ObjectName(vec![Ident::new("a")]),
             value: vec![SetVariableValue::Literal(Value::SingleQuotedString(
                 "b".into()
             ))],
@@ -804,7 +805,7 @@ fn parse_set() {
         Statement::SetVariable {
             local: false,
             hivevar: false,
-            variable: "a".into(),
+            variable: ObjectName(vec![Ident::new("a")]),
             value: vec![SetVariableValue::Literal(number("0"))],
         }
     );
@@ -815,7 +816,7 @@ fn parse_set() {
         Statement::SetVariable {
             local: false,
             hivevar: false,
-            variable: "a".into(),
+            variable: ObjectName(vec![Ident::new("a")]),
             value: vec![SetVariableValue::Ident("DEFAULT".into())],
         }
     );
@@ -826,11 +827,42 @@ fn parse_set() {
         Statement::SetVariable {
             local: true,
             hivevar: false,
-            variable: "a".into(),
+            variable: ObjectName(vec![Ident::new("a")]),
             value: vec![SetVariableValue::Ident("b".into())],
         }
     );
 
+    let stmt = pg_and_generic().verified_stmt("SET a.b.c = b");
+    assert_eq!(
+        stmt,
+        Statement::SetVariable {
+            local: false,
+            hivevar: false,
+            variable: ObjectName(vec![Ident::new("a"), Ident::new("b"), Ident::new("c")]),
+            value: vec![SetVariableValue::Ident("b".into())],
+        }
+    );
+
+    let stmt = pg_and_generic().one_statement_parses_to(
+        "SET hive.tez.auto.reducer.parallelism=false",
+        "SET hive.tez.auto.reducer.parallelism = false",
+    );
+    assert_eq!(
+        stmt,
+        Statement::SetVariable {
+            local: false,
+            hivevar: false,
+            variable: ObjectName(vec![
+                Ident::new("hive"),
+                Ident::new("tez"),
+                Ident::new("auto"),
+                Ident::new("reducer"),
+                Ident::new("parallelism")
+            ]),
+            value: vec![SetVariableValue::Literal(Boolean(false))],
+        }
+    );
+
     pg_and_generic().one_statement_parses_to("SET a TO b", "SET a = b");
     pg_and_generic().one_statement_parses_to("SET SESSION a = b", "SET a = b");