[Tarantool-patches] [PATCH v4 5/7] box, datetime: datetime comparison for indices

[Timur Safin via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

* storage hints implemented for datetime_t values;
* proper comparison for indices of datetime type.

Part of #5941
Part of #5946
---
 src/box/field_def.c           | 18 ++++++++
 src/box/field_def.h           |  3 ++
 src/box/memtx_space.c         |  3 +-
 src/box/tuple_compare.cc      | 57 ++++++++++++++++++++++++++
 src/box/vinyl.c               |  3 +-
 test/engine/datetime.result   | 77 +++++++++++++++++++++++++++++++++++
 test/engine/datetime.test.lua | 35 ++++++++++++++++
 7 files changed, 192 insertions(+), 4 deletions(-)
 create mode 100644 test/engine/datetime.result
 create mode 100644 test/engine/datetime.test.lua

diff --git a/src/box/field_def.c b/src/box/field_def.c
index 2682a42ee..97033d0bb 100644
--- a/src/box/field_def.c
+++ b/src/box/field_def.c
@@ -194,3 +194,21 @@ field_type_by_name(const char *name, size_t len)
 		return FIELD_TYPE_ANY;
 	return field_type_MAX;
 }
+
+const bool field_type_index_allowed[] =
+    {
+	/* [FIELD_TYPE_ANY]      = */ false,
+	/* [FIELD_TYPE_UNSIGNED] = */ true,
+	/* [FIELD_TYPE_STRING]   = */ true,
+	/* [FIELD_TYPE_NUMBER]   = */ true,
+	/* [FIELD_TYPE_DOUBLE]   = */ true,
+	/* [FIELD_TYPE_INTEGER]  = */ true,
+	/* [FIELD_TYPE_BOOLEAN]  = */ true,
+	/* [FIELD_TYPE_VARBINARY]= */ true,
+	/* [FIELD_TYPE_SCALAR]   = */ true,
+	/* [FIELD_TYPE_DECIMAL]  = */ true,
+	/* [FIELD_TYPE_UUID]     = */ true,
+	/* [FIELD_TYPE_ARRAY]    = */ false,
+	/* [FIELD_TYPE_MAP]      = */ false,
+	/* [FIELD_TYPE_DATETIME] = */ true,
+};
diff --git a/src/box/field_def.h b/src/box/field_def.h
index 120b2a93d..bd02418df 100644
--- a/src/box/field_def.h
+++ b/src/box/field_def.h
@@ -120,6 +120,9 @@ extern const uint32_t field_ext_type[];
 extern const struct opt_def field_def_reg[];
 extern const struct field_def field_def_default;
 
+/** helper table for checking allowed indices for types */
+extern const bool field_type_index_allowed[];
+
 /**
  * @brief Field definition
  * Contains information about of one tuple field.
diff --git a/src/box/memtx_space.c b/src/box/memtx_space.c
index b71318d24..1ab16122e 100644
--- a/src/box/memtx_space.c
+++ b/src/box/memtx_space.c
@@ -748,8 +748,7 @@ memtx_space_check_index_def(struct space *space, struct index_def *index_def)
 	/* Check that there are no ANY, ARRAY, MAP parts */
 	for (uint32_t i = 0; i < key_def->part_count; i++) {
 		struct key_part *part = &key_def->parts[i];
-		if (part->type <= FIELD_TYPE_ANY ||
-		    part->type >= FIELD_TYPE_ARRAY) {
+		if (!field_type_index_allowed[part->type]) {
 			diag_set(ClientError, ER_MODIFY_INDEX,
 				 index_def->name, space_name(space),
 				 tt_sprintf("field type '%s' is not supported",
diff --git a/src/box/tuple_compare.cc b/src/box/tuple_compare.cc
index 9a69f2a72..110017853 100644
--- a/src/box/tuple_compare.cc
+++ b/src/box/tuple_compare.cc
@@ -538,6 +538,8 @@ tuple_compare_field_with_type(const char *field_a, enum mp_type a_type,
 						   field_b, b_type);
 	case FIELD_TYPE_UUID:
 		return mp_compare_uuid(field_a, field_b);
+	case FIELD_TYPE_DATETIME:
+		return mp_compare_datetime(field_a, field_b);
 	default:
 		unreachable();
 		return 0;
@@ -1538,6 +1540,21 @@ func_index_compare_with_key(struct tuple *tuple, hint_t tuple_hint,
 #define HINT_VALUE_DOUBLE_MAX	(exp2(HINT_VALUE_BITS - 1) - 1)
 #define HINT_VALUE_DOUBLE_MIN	(-exp2(HINT_VALUE_BITS - 1))
 
+/**
+ * We need to squeeze 64 bits of seconds and 32 bits of nanoseconds
+ * into 60 bits of hint value. The idea is to represent wide enough
+ * years range, and leave the rest of bits occupied from nanoseconds part:
+ * - 36 bits is enough for time range of [208BC..4147]
+ * - for nanoseconds there is left 24 bits, which are MSB part of
+ *   32-bit value
+ */
+#define HINT_VALUE_SECS_BITS	36
+#define HINT_VALUE_NSEC_BITS	(HINT_VALUE_BITS - HINT_VALUE_SECS_BITS)
+#define HINT_VALUE_SECS_MAX	((1LL << HINT_VALUE_SECS_BITS) - 1)
+#define HINT_VALUE_SECS_MIN	(-(1LL << HINT_VALUE_SECS_BITS))
+#define HINT_VALUE_NSEC_SHIFT	(sizeof(int) * CHAR_BIT - HINT_VALUE_NSEC_BITS)
+#define HINT_VALUE_NSEC_MAX	((1ULL << HINT_VALUE_NSEC_BITS) - 1)
+
 /*
  * HINT_CLASS_BITS should be big enough to store any mp_class value.
  * Note, ((1 << HINT_CLASS_BITS) - 1) is reserved for HINT_NONE.
@@ -1630,6 +1647,25 @@ hint_uuid_raw(const char *data)
 	return hint_create(MP_CLASS_UUID, val);
 }
 
+static inline hint_t
+hint_datetime(struct datetime *date)
+{
+	/*
+	 * Use at most HINT_VALUE_SECS_BITS from datetime
+	 * seconds field as a hint value, and at MSB part
+	 * of HINT_VALUE_NSEC_BITS from nanoseconds.
+	 */
+	int64_t secs = date->secs;
+	int32_t nsec = date->nsec;
+	uint64_t val = secs <= HINT_VALUE_SECS_MIN ? 0 :
+			secs - HINT_VALUE_SECS_MIN;
+	if (val >= HINT_VALUE_SECS_MAX)
+		val = HINT_VALUE_SECS_MAX;
+	val <<= HINT_VALUE_NSEC_BITS;
+	val |= (nsec >> HINT_VALUE_NSEC_SHIFT) & HINT_VALUE_NSEC_MAX;
+	return hint_create(MP_CLASS_DATETIME, val);
+}
+
 static inline uint64_t
 hint_str_raw(const char *s, uint32_t len)
 {
@@ -1761,6 +1797,17 @@ field_hint_uuid(const char *field)
 	return hint_uuid_raw(data);
 }
 
+static inline hint_t
+field_hint_datetime(const char *field)
+{
+	assert(mp_typeof(*field) == MP_EXT);
+	int8_t ext_type;
+	uint32_t len = mp_decode_extl(&field, &ext_type);
+	assert(ext_type == MP_DATETIME);
+	struct datetime date;
+	return hint_datetime(datetime_unpack(&field, len, &date));
+}
+
 static inline hint_t
 field_hint_string(const char *field, struct coll *coll)
 {
@@ -1812,6 +1859,11 @@ field_hint_scalar(const char *field, struct coll *coll)
 		}
 		case MP_UUID:
 			return hint_uuid_raw(field);
+		case MP_DATETIME:
+		{
+			struct datetime date;
+			return hint_datetime(datetime_unpack(&field, len, &date));
+		}
 		default:
 			unreachable();
 		}
@@ -1849,6 +1901,8 @@ field_hint(const char *field, struct coll *coll)
 		return field_hint_decimal(field);
 	case FIELD_TYPE_UUID:
 		return field_hint_uuid(field);
+	case FIELD_TYPE_DATETIME:
+		return field_hint_datetime(field);
 	default:
 		unreachable();
 	}
@@ -1963,6 +2017,9 @@ key_def_set_hint_func(struct key_def *def)
 	case FIELD_TYPE_UUID:
 		key_def_set_hint_func<FIELD_TYPE_UUID>(def);
 		break;
+	case FIELD_TYPE_DATETIME:
+		key_def_set_hint_func<FIELD_TYPE_DATETIME>(def);
+		break;
 	default:
 		/* Invalid key definition. */
 		def->key_hint = NULL;
diff --git a/src/box/vinyl.c b/src/box/vinyl.c
index c80b2d99b..360d1fa70 100644
--- a/src/box/vinyl.c
+++ b/src/box/vinyl.c
@@ -662,8 +662,7 @@ vinyl_space_check_index_def(struct space *space, struct index_def *index_def)
 	/* Check that there are no ANY, ARRAY, MAP parts */
 	for (uint32_t i = 0; i < key_def->part_count; i++) {
 		struct key_part *part = &key_def->parts[i];
-		if (part->type <= FIELD_TYPE_ANY ||
-		    part->type >= FIELD_TYPE_ARRAY) {
+		if (!field_type_index_allowed[part->type]) {
 			diag_set(ClientError, ER_MODIFY_INDEX,
 				 index_def->name, space_name(space),
 				 tt_sprintf("field type '%s' is not supported",
diff --git a/test/engine/datetime.result b/test/engine/datetime.result
new file mode 100644
index 000000000..848a0aaec
--- /dev/null
+++ b/test/engine/datetime.result
@@ -0,0 +1,77 @@
+-- test-run result file version 2
+env = require('test_run')
+ | ---
+ | ...
+test_run = env.new()
+ | ---
+ | ...
+engine = test_run:get_cfg('engine')
+ | ---
+ | ...
+
+date = require('datetime')
+ | ---
+ | ...
+
+_ = box.schema.space.create('T', {engine = engine})
+ | ---
+ | ...
+_ = box.space.T:create_index('pk', {parts={1,'datetime'}})
+ | ---
+ | ...
+
+box.space.T:insert{date('1970-01-01')}\
+box.space.T:insert{date('1970-01-02')}\
+box.space.T:insert{date('1970-01-03')}\
+box.space.T:insert{date('2000-01-01')}
+ | ---
+ | ...
+
+o = box.space.T:select{}
+ | ---
+ | ...
+assert(tostring(o[1][1]) == '1970-01-01T00:00Z')
+ | ---
+ | - true
+ | ...
+assert(tostring(o[2][1]) == '1970-01-02T00:00Z')
+ | ---
+ | - true
+ | ...
+assert(tostring(o[3][1]) == '1970-01-03T00:00Z')
+ | ---
+ | - true
+ | ...
+assert(tostring(o[4][1]) == '2000-01-01T00:00Z')
+ | ---
+ | - true
+ | ...
+
+for i = 1,16 do\
+    box.space.T:insert{date.now()}\
+end
+ | ---
+ | ...
+
+a = box.space.T:select{}
+ | ---
+ | ...
+err = {}
+ | ---
+ | ...
+for i = 1, #a - 1 do\
+    if a[i][1] >= a[i+1][1] then\
+        table.insert(err, {a[i][1], a[i+1][1]})\
+        break\
+    end\
+end
+ | ---
+ | ...
+
+err
+ | ---
+ | - []
+ | ...
+box.space.T:drop()
+ | ---
+ | ...
diff --git a/test/engine/datetime.test.lua b/test/engine/datetime.test.lua
new file mode 100644
index 000000000..3685e4d4b
--- /dev/null
+++ b/test/engine/datetime.test.lua
@@ -0,0 +1,35 @@
+env = require('test_run')
+test_run = env.new()
+engine = test_run:get_cfg('engine')
+
+date = require('datetime')
+
+_ = box.schema.space.create('T', {engine = engine})
+_ = box.space.T:create_index('pk', {parts={1,'datetime'}})
+
+box.space.T:insert{date('1970-01-01')}\
+box.space.T:insert{date('1970-01-02')}\
+box.space.T:insert{date('1970-01-03')}\
+box.space.T:insert{date('2000-01-01')}
+
+o = box.space.T:select{}
+assert(tostring(o[1][1]) == '1970-01-01T00:00Z')
+assert(tostring(o[2][1]) == '1970-01-02T00:00Z')
+assert(tostring(o[3][1]) == '1970-01-03T00:00Z')
+assert(tostring(o[4][1]) == '2000-01-01T00:00Z')
+
+for i = 1,16 do\
+    box.space.T:insert{date.now()}\
+end
+
+a = box.space.T:select{}
+err = {}
+for i = 1, #a - 1 do\
+    if a[i][1] >= a[i+1][1] then\
+        table.insert(err, {a[i][1], a[i+1][1]})\
+        break\
+    end\
+end
+
+err
+box.space.T:drop()
-- 
2.29.2