scan: support datetime filters

Before this patch, datetime conditions were supported only in iterators,
but not filters. (Filter is any non-indexed condition or condition
for any non-iterating index. Any condition index expect for the first
one is non-iterating.) This patch introduce datetime comparison support
to filter codegen library, similar to uuid one.

Closes #373

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+* Working with datetime conditions in case of non-indexed fields or
+  non-iterating indexes (#373).
+
 ## [1.4.3] - 05-02-24
 
 ### Fixed

crud/compare/filters.lua

@@ -1,3 +1,5 @@
+local _, datetime = pcall(require, 'datetime')
+
 local errors = require('errors')
 
 local utils = require('crud.common.utils')
@@ -159,6 +161,8 @@ local function format_value(value)
         return tostring(value)
     elseif utils.is_uuid(value) then
         return ("%q"):format(value)
+    elseif datetime.is_datetime(value) then
+        return ("%q"):format(value:format())
     elseif type(value) == 'cdata' then
         return tostring(value)
     end
@@ -283,6 +287,8 @@ local function format_eq(cond)
             end
         elseif value_type == 'uuid' then
             func_name = 'eq_uuid'
+        elseif value_type == 'datetime' then
+            func_name = 'eq_datetime'
         end
 
         table.insert(cond_strings, format_comp_with_value(field, func_name, value))
@@ -309,6 +315,8 @@ local function format_lt(cond)
             func_name = add_collation_postfix('lt', value_opts)
         elseif value_type == 'uuid' then
             func_name = 'lt_uuid'
+        elseif value_type == 'datetime' then
+            func_name = 'lt_datetime'
         end
 
         func_name = add_strict_postfix(func_name, value_opts)
@@ -533,6 +541,30 @@ local function lt_uuid_strict(lhs, rhs)
     return tostring(lhs) < tostring(rhs)
 end
 
+local function opt_datetime_parse(v)
+    if type(v) == 'string' then
+        return datetime.parse(v)
+    end
+
+    return v
+end
+
+local function lt_datetime_nullable(lhs, rhs)
+    if lhs == nil and rhs ~= nil then
+        return true
+    elseif rhs == nil then
+        return false
+    end
+    return opt_datetime_parse(lhs) < opt_datetime_parse(rhs)
+end
+
+local function lt_datetime_strict(lhs, rhs)
+    if rhs == nil then
+        return false
+    end
+    return opt_datetime_parse(lhs) < opt_datetime_parse(rhs)
+end
+
 local function lt_unicode_ci_nullable(lhs, rhs)
     if lhs == nil and rhs ~= nil then
         return true
@@ -567,6 +599,20 @@ local function eq_uuid_strict(lhs, rhs)
     return tostring(lhs) == tostring(rhs)
 end
 
+local function eq_datetime(lhs, rhs)
+    if lhs == nil then
+        return rhs == nil
+    end
+    return opt_datetime_parse(lhs) == opt_datetime_parse(rhs)
+end
+
+local function eq_datetime_strict(lhs, rhs)
+    if rhs == nil then
+        return false
+    end
+    return opt_datetime_parse(lhs) == opt_datetime_parse(rhs)
+end
+
 local function eq_unicode_nullable(lhs, rhs)
     if lhs == nil and rhs == nil then
         return true
@@ -604,6 +650,8 @@ local library = {
     eq = eq,
     eq_uuid = eq_uuid,
     eq_uuid_strict = eq_uuid_strict,
+    eq_datetime = eq_datetime,
+    eq_datetime_strict = eq_datetime_strict,
     -- nullable
     eq_unicode = eq_unicode_nullable,
     eq_unicode_ci = eq_unicode_ci_nullable,
@@ -618,12 +666,14 @@ local library = {
     lt_unicode_ci = lt_unicode_ci_nullable,
     lt_boolean = lt_boolean_nullable,
     lt_uuid = lt_uuid_nullable,
+    lt_datetime = lt_datetime_nullable,
     -- strict
     lt_strict = lt_strict,
     lt_unicode_strict = lt_unicode_strict,
     lt_unicode_ci_strict = lt_unicode_ci_strict,
     lt_boolean_strict = lt_boolean_strict,
     lt_uuid_strict = lt_uuid_strict,
+    lt_datetime_strict = lt_datetime_strict,
 
     utf8 = utf8,
 

test/entrypoint/srv_select/storage_init.lua

@@ -1,3 +1,4 @@
+local datetime_supported, _ = pcall(require, 'datetime')
 local crud_utils = require('crud.common.utils')
 
 return function()
@@ -227,4 +228,100 @@ return function()
         unique = false,
         if_not_exists = true,
     })
+
+    if datetime_supported then
+        local datetime_format = {
+            {name = 'id', type = 'unsigned'},
+            {name = 'bucket_id', type = 'unsigned'},
+            {name = 'datetime_field', type = 'datetime'},
+        }
+
+
+        local datetime_nonindexed_space = box.schema.space.create('datetime_nonindexed', {
+            if_not_exists = true,
+            engine = engine,
+        })
+
+        datetime_nonindexed_space:format(datetime_format)
+
+        datetime_nonindexed_space:create_index('id_index', {
+            parts = { 'id' },
+            if_not_exists = true,
+        })
+
+        datetime_nonindexed_space:create_index('bucket_id', {
+            parts = { 'bucket_id' },
+            unique = false,
+            if_not_exists = true,
+        })
+
+
+        local datetime_indexed_space = box.schema.space.create('datetime_indexed', {
+            if_not_exists = true,
+            engine = engine,
+        })
+
+        datetime_indexed_space:format(datetime_format)
+
+        datetime_indexed_space:create_index('id_index', {
+            parts = { 'id' },
+            if_not_exists = true,
+        })
+
+        datetime_indexed_space:create_index('bucket_id', {
+            parts = { 'bucket_id' },
+            unique = false,
+            if_not_exists = true,
+        })
+
+        datetime_indexed_space:create_index('datetime_index', {
+            parts = { 'datetime_field' },
+            unique = false,
+            if_not_exists = true,
+        })
+
+
+        local datetime_pk_space = box.schema.space.create('datetime_pk', {
+            if_not_exists = true,
+            engine = engine,
+        })
+
+        datetime_pk_space:format(datetime_format)
+
+        datetime_pk_space:create_index('datetime_index', {
+            parts = { 'datetime_field' },
+            if_not_exists = true,
+        })
+
+        datetime_pk_space:create_index('bucket_id', {
+            parts = { 'bucket_id' },
+            unique = false,
+            if_not_exists = true,
+        })
+
+
+        local datetime_multipart_index_space = box.schema.space.create('datetime_multipart_index', {
+            if_not_exists = true,
+            engine = engine,
+        })
+
+        datetime_multipart_index_space:format(datetime_format)
+
+        datetime_multipart_index_space:create_index('id_index', {
+            parts = { 'id' },
+            if_not_exists = true,
+        })
+
+        datetime_multipart_index_space:create_index('bucket_id', {
+            parts = { 'bucket_id' },
+            unique = false,
+            if_not_exists = true,
+        })
+
+        datetime_multipart_index_space:create_index('datetime_index', {
+            parts = { 'id', 'datetime_field' },
+            unique = false,
+            if_not_exists = true,
+        })
+    end
 end

test/helper.lua

@@ -958,4 +958,9 @@ function helpers.prepare_ordered_data(g, space, expected_objects, bucket_id, ord
     t.assert_equals(objects, expected_objects)
 end
 
+function helpers.skip_datetime_unsupported()
+    local module_available, _ = pcall(require, 'datetime')
+    t.skip_if(not module_available, 'datetime is not supported')
+end
+
 return helpers

test/integration/pairs_readview_test.lua

@@ -882,27 +882,35 @@ pgroup.test_pairs_no_map_reduce = function(g)
     t.assert_equals(diff_2, 0, 'Select request was not a map reduce')
 end
 
-pgroup.test_gh_418_pairs_with_secondary_noneq_index_condition = function(g)
-    local read = function(cg, space, conditions, opts)
-        opts = table.deepcopy(opts) or {}
-        opts.use_tomap = true
+local function read_impl(cg, space, conditions, opts)
+    opts = table.deepcopy(opts) or {}
+    opts.use_tomap = true
 
-        return cg.cluster.main_server:exec(function(space, conditions, opts)
-            local crud = require('crud')
+    return cg.cluster.main_server:exec(function(space, conditions, opts)
+        local crud = require('crud')
 
-            local rv, err = crud.readview()
-            t.assert_equals(err, nil)
+        local rv, err = crud.readview()
+        t.assert_equals(err, nil)
 
-            local status, resp = pcall(function()
-                return rv:pairs(space, conditions, opts):totable()
-            end)
-            t.assert(status, resp)
+        local status, resp = pcall(function()
+            return rv:pairs(space, conditions, opts):totable()
+        end)
+        t.assert(status, resp)
 
-            rv:close()
+        rv:close()
 
-            return resp, nil
-        end, {space, conditions, opts})
-    end
+        return resp, nil
+    end, {space, conditions, opts})
+end
 
-    read_scenario.gh_418_read_with_secondary_noneq_index_condition(g, read)
+pgroup.test_gh_418_pairs_with_secondary_noneq_index_condition = function(g)
+    read_scenario.gh_418_read_with_secondary_noneq_index_condition(g, read_impl)
+end
+
+for case_name_template, case in pairs(read_scenario.gh_373_read_with_datetime_condition_cases) do
+    local case_name = 'test_' .. case_name_template:format('pairs')
+
+    pgroup[case_name] = function(g)
+        case(g, read_impl)
+    end
 end

test/integration/pairs_test.lua

@@ -893,23 +893,32 @@ pgroup.test_pairs_no_map_reduce = function(g)
     t.assert_equals(diff_2, 0, 'Select request was not a map reduce')
 end
 
-pgroup.test_gh_418_pairs_with_secondary_noneq_index_condition = function(g)
-    local read = function(cg, space, conditions, opts)
-        opts = table.deepcopy(opts) or {}
-        opts.mode = 'write'
-        opts.use_tomap = true
 
-        return cg.cluster.main_server:exec(function(space, conditions, opts)
-            local crud = require('crud')
+local function read_impl(cg, space, conditions, opts)
+    opts = table.deepcopy(opts) or {}
+    opts.mode = 'write'
+    opts.use_tomap = true
+
+    return cg.cluster.main_server:exec(function(space, conditions, opts)
+        local crud = require('crud')
 
-            local status, resp = pcall(function()
-                return crud.pairs(space, conditions, opts):totable()
-            end)
-            t.assert(status, resp)
+        local status, resp = pcall(function()
+            return crud.pairs(space, conditions, opts):totable()
+        end)
+        t.assert(status, resp)
 
-            return resp, nil
-        end, {space, conditions, opts})
-    end
+        return resp, nil
+    end, {space, conditions, opts})
+end
 
-    read_scenario.gh_418_read_with_secondary_noneq_index_condition(g, read)
+pgroup.test_gh_418_pairs_with_secondary_noneq_index_condition = function(g)
+    read_scenario.gh_418_read_with_secondary_noneq_index_condition(g, read_impl)
+end
+
+for case_name_template, case in pairs(read_scenario.gh_373_read_with_datetime_condition_cases) do
+    local case_name = 'test_' .. case_name_template:format('pairs')
+
+    pgroup[case_name] = function(g)
+        case(g, read_impl)
+    end
 end