Add "timezone_region" and "timezone_abbr" support for EXTRACT (and DATE_PART) (#1090)

Author: alexander-beedie

src/ast/value.rs

@@ -143,8 +143,10 @@ pub enum DateTimeField {
     Quarter,
     Time,
     Timezone,
+    TimezoneAbbr,
     TimezoneHour,
     TimezoneMinute,
+    TimezoneRegion,
     NoDateTime,
 }
 
@@ -181,8 +183,10 @@ impl fmt::Display for DateTimeField {
             DateTimeField::Quarter => "QUARTER",
             DateTimeField::Time => "TIME",
             DateTimeField::Timezone => "TIMEZONE",
+            DateTimeField::TimezoneAbbr => "TIMEZONE_ABBR",
             DateTimeField::TimezoneHour => "TIMEZONE_HOUR",
             DateTimeField::TimezoneMinute => "TIMEZONE_MINUTE",
+            DateTimeField::TimezoneRegion => "TIMEZONE_REGION",
             DateTimeField::NoDateTime => "NODATETIME",
         })
     }

src/keywords.rs

@@ -654,8 +654,10 @@ define_keywords!(
     TIMESTAMPTZ,
     TIMETZ,
     TIMEZONE,
+    TIMEZONE_ABBR,
     TIMEZONE_HOUR,
     TIMEZONE_MINUTE,
+    TIMEZONE_REGION,
     TINYINT,
     TO,
     TOP,

src/parser/mod.rs

@@ -1800,8 +1800,10 @@ impl<'a> Parser<'a> {
                 Keyword::QUARTER => Ok(DateTimeField::Quarter),
                 Keyword::TIME => Ok(DateTimeField::Time),
                 Keyword::TIMEZONE => Ok(DateTimeField::Timezone),
+                Keyword::TIMEZONE_ABBR => Ok(DateTimeField::TimezoneAbbr),
                 Keyword::TIMEZONE_HOUR => Ok(DateTimeField::TimezoneHour),
                 Keyword::TIMEZONE_MINUTE => Ok(DateTimeField::TimezoneMinute),
+                Keyword::TIMEZONE_REGION => Ok(DateTimeField::TimezoneRegion),
                 _ => self.expected("date/time field", next_token),
             },
             _ => self.expected("date/time field", next_token),

tests/sqlparser_common.rs

@@ -2249,8 +2249,10 @@ fn parse_extract() {
     verified_stmt("SELECT EXTRACT(MILLISECONDS FROM d)");
     verified_stmt("SELECT EXTRACT(QUARTER FROM d)");
     verified_stmt("SELECT EXTRACT(TIMEZONE FROM d)");
+    verified_stmt("SELECT EXTRACT(TIMEZONE_ABBR FROM d)");
     verified_stmt("SELECT EXTRACT(TIMEZONE_HOUR FROM d)");
     verified_stmt("SELECT EXTRACT(TIMEZONE_MINUTE FROM d)");
+    verified_stmt("SELECT EXTRACT(TIMEZONE_REGION FROM d)");
     verified_stmt("SELECT EXTRACT(TIME FROM d)");
 
     let res = parse_sql_statements("SELECT EXTRACT(JIFFY FROM d)");