[calcite] 01/02: [CALCITE-5217] Add support for INTERVAL qualifier for Firebolt

[jbalint]

This is an automated email from the ASF dual-hosted git repository.

jbalint pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/calcite.git

commit bae84c7e17e038169fefb7119bfd43af6707f8da
Author: Aymeric <ayme...@firebolt.io>
AuthorDate: Sat Jul 23 09:50:04 2022 +0100

    [CALCITE-5217] Add support for INTERVAL qualifier for Firebolt
---
 .../apache/calcite/sql/dialect/FireboltSqlDialect.java    | 15 +++++++++++++++
 .../apache/calcite/rel/rel2sql/RelToSqlConverterTest.java | 10 ++++++++++
 2 files changed, 25 insertions(+)

diff --git 
a/core/src/main/java/org/apache/calcite/sql/dialect/FireboltSqlDialect.java 
b/core/src/main/java/org/apache/calcite/sql/dialect/FireboltSqlDialect.java
index 25a4859fd8..d76e902a27 100644
--- a/core/src/main/java/org/apache/calcite/sql/dialect/FireboltSqlDialect.java
+++ b/core/src/main/java/org/apache/calcite/sql/dialect/FireboltSqlDialect.java
@@ -23,6 +23,7 @@ import org.apache.calcite.sql.SqlAlienSystemTypeNameSpec;
 import org.apache.calcite.sql.SqlCall;
 import org.apache.calcite.sql.SqlDataTypeSpec;
 import org.apache.calcite.sql.SqlDialect;
+import org.apache.calcite.sql.SqlIntervalLiteral;
 import org.apache.calcite.sql.SqlKind;
 import org.apache.calcite.sql.SqlLiteral;
 import org.apache.calcite.sql.SqlNode;
@@ -200,4 +201,18 @@ public class FireboltSqlDialect extends SqlDialect {
       }
     }
   }
+
+  @Override public void unparseSqlIntervalLiteral(SqlWriter writer,
+      SqlIntervalLiteral literal, int leftPrec, int rightPrec) {
+    SqlIntervalLiteral.IntervalValue interval =
+        literal.getValueAs(SqlIntervalLiteral.IntervalValue.class);
+    writer.keyword("INTERVAL");
+    writer.print("'");
+    if (interval.getSign() == -1) {
+      writer.print("-");
+    }
+    writer.literal(interval.getIntervalLiteral());
+    writer.print(interval.getIntervalQualifier().toString());
+    writer.print("'");
+  }
 }
diff --git 
a/core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java 
b/core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java
index 5ef9e02126..05ef6e03c4 100644
--- 
a/core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java
+++ 
b/core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java
@@ -4004,6 +4004,16 @@ class RelToSqlConverterTest {
     sql(sql2).withBigQuery().throws_("Only INT64 is supported as the interval 
value for BigQuery.");
   }
 
+  @Test void testUnparseSqlIntervalQualifierFirebolt() {
+    final String sql = "select  * from \"employee\" where  \"hire_date\" + "
+        + "INTERVAL '10' HOUR > TIMESTAMP '2005-10-17 00:00:00' ";
+
+    final String expect = "SELECT *\n"
+        + "FROM \"foodmart\".\"employee\"\n"
+        + "WHERE (\"hire_date\" + INTERVAL '10 HOUR')"
+        + " > TIMESTAMP '2005-10-17 00:00:00'";
+    sql(sql).withFirebolt().ok(expect);
+  }
   @Test void testFloorMysqlWeek() {
     String query = "SELECT floor(\"hire_date\" TO WEEK) FROM \"employee\"";
     String expected = "SELECT STR_TO_DATE(DATE_FORMAT(`hire_date` , '%x%v-1'), 
'%x%v-%w')\n"