226 lines
8.0 KiB
C++
226 lines
8.0 KiB
C++
/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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// First include (the generated) my_config.h, to get correct platform defines.
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#include "my_config.h"
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#include <gtest/gtest.h>
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#include <stddef.h>
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#include <string>
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#include "sql/item_func.h"
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#include "sql/nested_join.h"
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#include "sql/sql_lex.h"
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#include "template_utils.h"
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#include "thr_lock.h"
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#include "unittest/gunit/parsertest.h"
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#include "unittest/gunit/test_utils.h"
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namespace table_factor_syntax_unittest {
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using my_testing::Mock_error_handler;
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using my_testing::Server_initializer;
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class TableFactorSyntaxTest : public ParserTest {
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protected:
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void test_table_factor_syntax(const char *query, int num_terms,
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bool expect_syntax_error) {
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SELECT_LEX *term1 = parse(query, expect_syntax_error ? ER_PARSE_ERROR : 0);
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EXPECT_EQ(nullptr, term1->first_inner_unit());
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EXPECT_EQ(nullptr, term1->next_select_in_list());
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EXPECT_EQ(1, term1->get_item_list()->head()->val_int());
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SELECT_LEX_UNIT *top_union = term1->master_unit();
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EXPECT_EQ(nullptr, top_union->outer_select());
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if (num_terms > 1) {
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SELECT_LEX *term2 = term1->next_select();
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ASSERT_FALSE(term2 == NULL);
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EXPECT_EQ(nullptr, term2->first_inner_unit());
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EXPECT_EQ(term1, term2->next_select_in_list());
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EXPECT_EQ(2, term2->get_item_list()->head()->val_int());
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if (num_terms <= 2) {
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EXPECT_EQ(nullptr, term2->next_select());
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}
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EXPECT_EQ(top_union, term2->master_unit());
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}
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}
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void test_global_limit(const char *query) {
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SELECT_LEX *first_term = parse(query);
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SELECT_LEX_UNIT *unit = first_term->master_unit();
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EXPECT_EQ(1U, unit->global_parameters()->order_list.elements) << query;
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EXPECT_FALSE(unit->global_parameters()->select_limit == NULL) << query;
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}
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};
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void check_query_block(SELECT_LEX *block, int select_list_item,
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const char *tablename) {
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EXPECT_EQ(1U, block->item_list.elements);
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EXPECT_EQ(select_list_item, block->item_list.head()->val_int());
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EXPECT_EQ(1U, block->top_join_list.elements);
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EXPECT_STREQ(tablename, block->top_join_list.head()->alias);
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}
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TEST_F(TableFactorSyntaxTest, Single) {
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SELECT_LEX *term = parse("SELECT 2 FROM (SELECT 1 FROM t1) dt;", 0);
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EXPECT_EQ(nullptr, term->outer_select());
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SELECT_LEX_UNIT *top_union = term->master_unit();
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EXPECT_EQ(term, top_union->first_select());
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EXPECT_EQ(nullptr, term->next_select());
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ASSERT_EQ(1U, term->top_join_list.elements);
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EXPECT_STREQ("dt", term->top_join_list.head()->alias);
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SELECT_LEX_UNIT *inner_union = term->first_inner_unit();
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SELECT_LEX *inner_term = inner_union->first_select();
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check_query_block(inner_term, 1, "t1");
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}
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TEST_F(TableFactorSyntaxTest, TablelessTableSubquery) {
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SELECT_LEX *term = parse("SELECT 1 FROM (SELECT 2) a;", 0);
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EXPECT_EQ(nullptr, term->outer_select());
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SELECT_LEX_UNIT *top_union = term->master_unit();
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EXPECT_EQ(term, top_union->first_select());
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EXPECT_EQ(nullptr, term->next_select());
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ASSERT_EQ(1U, term->top_join_list.elements);
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EXPECT_STREQ("a", term->top_join_list.head()->alias);
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SELECT_LEX_UNIT *inner_union = term->first_inner_unit();
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SELECT_LEX *inner_term = inner_union->first_select();
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EXPECT_EQ(nullptr, inner_term->first_inner_unit());
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EXPECT_NE(term, term->table_list.first->derived_unit()->first_select())
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<< "No cycle in the AST, please.";
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}
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TEST_F(TableFactorSyntaxTest, Union) {
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SELECT_LEX *block = parse(
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"SELECT 1 FROM (SELECT 1 FROM t1 UNION SELECT 2 FROM t2) dt "
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"WHERE d1.a = 1",
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0);
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SELECT_LEX_UNIT *top_union = block->master_unit();
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EXPECT_EQ(block, top_union->first_select());
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EXPECT_EQ(nullptr, block->next_select());
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TABLE_LIST *dt = block->table_list.first;
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EXPECT_EQ(dt, block->context.first_name_resolution_table);
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Item_func *top_where_cond = down_cast<Item_func *>(block->where_cond());
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Item_field *d1a = down_cast<Item_field *>(top_where_cond->arguments()[0]);
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ASSERT_FALSE(d1a->context == NULL);
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EXPECT_EQ(dt, d1a->context->first_name_resolution_table);
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EXPECT_EQ(1U, block->top_join_list.elements);
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EXPECT_STREQ("dt", block->top_join_list.head()->alias);
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SELECT_LEX_UNIT *inner_union = block->first_inner_unit();
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SELECT_LEX *first_inner_block = inner_union->first_select();
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SELECT_LEX *second_inner_block = first_inner_block->next_select();
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TABLE_LIST *t1 = first_inner_block->table_list.first;
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TABLE_LIST *t2 = second_inner_block->table_list.first;
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EXPECT_EQ(t1, first_inner_block->context.first_name_resolution_table);
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EXPECT_EQ(t2, second_inner_block->context.first_name_resolution_table);
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EXPECT_EQ(nullptr, t1->nested_join);
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EXPECT_EQ(nullptr, t2->nested_join);
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check_query_block(first_inner_block, 1, "t1");
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check_query_block(second_inner_block, 2, "t2");
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EXPECT_EQ(nullptr, block->outer_select());
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}
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TEST_F(TableFactorSyntaxTest, NestedJoin) {
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SELECT_LEX *term = parse("SELECT * FROM (t1 JOIN t2 ON TRUE)", 0);
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SELECT_LEX_UNIT *top_union = term->master_unit();
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EXPECT_EQ(term, top_union->first_select());
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}
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TEST_F(TableFactorSyntaxTest, NestedNestedJoin) {
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SELECT_LEX *term =
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parse("SELECT * FROM ((t1 JOIN t2 ON TRUE) JOIN t3 ON TRUE)", 0);
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SELECT_LEX_UNIT *top_union = term->master_unit();
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EXPECT_EQ(term, top_union->first_select());
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}
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TEST_F(TableFactorSyntaxTest, NestedTableReferenceList) {
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SELECT_LEX *term1 =
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parse("SELECT * FROM t1 LEFT JOIN ( t2 JOIN t3 JOIN t4 ) ON t1.a = t3.a");
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SELECT_LEX *term2 =
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parse("SELECT * FROM t1 LEFT JOIN ( t2, t3, t4 ) ON t1.a = t3.a");
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SELECT_LEX_UNIT *top_union = term1->master_unit();
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SELECT_LEX_UNIT *top_union2 = term2->master_unit();
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EXPECT_EQ(term1, top_union->first_select());
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EXPECT_EQ(term2, top_union2->first_select());
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EXPECT_EQ(4U, term1->table_list.elements);
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ASSERT_EQ(4U, term2->table_list.elements);
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EXPECT_STREQ("t1", term1->table_list.first->alias);
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EXPECT_STREQ("t1", term2->table_list.first->alias);
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EXPECT_STREQ("(nest_last_join)", term1->join_list->head()->alias);
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EXPECT_STREQ("(nest_last_join)", term2->join_list->head()->alias);
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TABLE_LIST *t2_join_t3_join_t4 = term1->join_list->head();
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TABLE_LIST *t2_join_t3_join_t4_2 = term2->join_list->head();
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TABLE_LIST *t3_join_t4 = t2_join_t3_join_t4->nested_join->join_list.head();
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TABLE_LIST *t3_join_t4_2 =
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t2_join_t3_join_t4_2->nested_join->join_list.head();
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EXPECT_STREQ("(nest_last_join)", t3_join_t4->alias);
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EXPECT_STREQ("(nest_last_join)", t3_join_t4_2->alias);
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EXPECT_STREQ("t4", t3_join_t4->nested_join->join_list.head()->alias);
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}
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TEST_F(TableFactorSyntaxTest, LimitAndOrder) {
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test_global_limit("SELECT 1 AS c UNION (SELECT 1 AS c) ORDER BY c LIMIT 1");
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test_global_limit("(SELECT 1 AS c UNION SELECT 1 AS c) ORDER BY c LIMIT 1");
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test_global_limit("((SELECT 1 AS c) UNION SELECT 1 AS c) ORDER BY c LIMIT 1");
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test_global_limit("(SELECT 1 AS c UNION (SELECT 1 AS c)) ORDER BY c LIMIT 1");
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}
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} // namespace table_factor_syntax_unittest
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