fix(pest grammar): add cyrillic characters as valid for string values

Closes #183

src/frontend/sql/ir/tests.rs

@@ -349,6 +349,24 @@ fn front_sql15() {
     );
 }
 
+// check cyrillic strings support
+#[test]
+fn front_sql16() {
+    let input = r#"SELECT "identification_number", "product_code" FROM "hash_testing"
+        WHERE "product_code" = 'кириллица'"#;
+    let expected = PatternWithParams::new(
+        format!(
+            "{} {} {}",
+            r#"SELECT "hash_testing"."identification_number" as "identification_number","#,
+            r#""hash_testing"."product_code" as "product_code""#,
+            r#"FROM "hash_testing" WHERE ("hash_testing"."product_code") = (?)"#,
+        ),
+        vec![Value::from("кириллица")],
+    );
+
+    assert_eq!(sql_to_sql(input, &[], &no_transform), expected);
+}
+
 #[test]
 fn front_params1() {
     let pattern = r#"SELECT "id", "FIRST_NAME" FROM "test_space"
@@ -382,3 +400,21 @@ fn front_params2() {
 
     assert_eq!(sql_to_sql(pattern, &params, &no_transform), expected);
 }
+
+// check cyrillic params support
+#[test]
+fn front_params3() {
+    let pattern = r#"SELECT "id" FROM "test_space"
+        WHERE "sys_op" = ? AND "FIRST_NAME" = ?"#;
+    let params = vec![Value::Null, Value::from("кириллица")];
+    let expected = PatternWithParams::new(
+        format!(
+            "{} {}",
+            r#"SELECT "test_space"."id" as "id" FROM "test_space""#,
+            r#"WHERE ("test_space"."sys_op") = (?) and ("test_space"."FIRST_NAME") = (?)"#,
+        ),
+        params.clone(),
+    );
+
+    assert_eq!(sql_to_sql(pattern, &params, &no_transform), expected);
+}

src/frontend/sql/query.pest

@@ -59,7 +59,7 @@ Expr = _{  Or | And | Cmp | Primary | Parentheses }
         OrLeft = _{ AndRight }
         OrRight = _{ Or | OrLeft }
 
-String = @{ !(WHITESPACE* ~ Keyword ~ WHITESPACE) ~ ('A' .. 'Z' | 'a'..'z' | "-" | "_" | ASCII_DIGIT)+ }
+String = @{ !(WHITESPACE* ~ Keyword ~ WHITESPACE) ~ ('А' .. 'Я' | 'а' .. 'я' | 'A' .. 'Z' | 'a'..'z' | "-" | "_" | ASCII_DIGIT)+ }
     Keyword = { ^"union" | ^"where" }
 
 Value = _{ Parameter | Row | True | False | Null | Decimal | Double | Unsigned | Integer | SingleQuotedString }

test_app/test/integration/api_test.lua

@@ -440,6 +440,64 @@ g.test_insert_3 = function()
     })
 end
 
+-- check cyrillic consts support
+g.test_insert_4 = function()
+    local api = cluster:server("api-1").net_box
+
+    local r, err = api:call("query", { [[INSERT INTO "space_simple_shard_key"
+    ("sysOp", "id", "name") VALUES (?, ?, 'кириллица'), (?, ?, 'КИРИЛЛИЦА')]], { 5, 4, 6, 5 } })
+
+    t.assert_equals(err, nil)
+    t.assert_equals(r, {row_count = 2})
+
+    r, err = api:call("query", { [[SELECT *, "bucket_id" FROM "space_simple_shard_key"]], {} })
+
+    t.assert_equals(err, nil)
+    t.assert_equals(r, {
+        metadata = {
+            {name = "id", type = "integer"},
+            {name = "name", type = "string"},
+            {name = "sysOp", type = "integer"},
+            {name = "bucket_id", type = "unsigned"},
+        },
+        rows = {
+            {1, "ok", 1, 3940},
+            {5, "КИРИЛЛИЦА", 6, 6661},
+            {10, box.NULL, 0, 11520},
+            {4, "кириллица", 5, 27225},
+        },
+    })
+end
+
+-- check cyrillic params support
+g.test_insert_5 = function()
+    local api = cluster:server("api-1").net_box
+
+    local r, err = api:call("query", { [[INSERT INTO "space_simple_shard_key"
+    ("sysOp", "id", "name") VALUES (?, ?, ?), (?, ?, ?)]], { 5, 4, "кириллица", 6, 5, "КИРИЛЛИЦА" } })
+
+    t.assert_equals(err, nil)
+    t.assert_equals(r, {row_count = 2})
+
+    r, err = api:call("query", { [[SELECT *, "bucket_id" FROM "space_simple_shard_key"]], {} })
+
+    t.assert_equals(err, nil)
+    t.assert_equals(r, {
+        metadata = {
+            {name = "id", type = "integer"},
+            {name = "name", type = "string"},
+            {name = "sysOp", type = "integer"},
+            {name = "bucket_id", type = "unsigned"},
+        },
+        rows = {
+            {1, "ok", 1, 3940},
+            {5, "КИРИЛЛИЦА", 6, 6661},
+            {10, box.NULL, 0, 11520},
+            {4, "кириллица", 5, 27225},
+        },
+    })
+end
+
 g.test_invalid_explain = function()
     local api = cluster:server("api-1").net_box