From 750a8856c4114f706ffffb026636a37b805f82b4 Mon Sep 17 00:00:00 2001
From: tianyahui-python <39303074+tianyahui-python@users.noreply.github.com>
Date: Fri, 26 Aug 2022 16:11:13 +0800
Subject: [PATCH] add comment test (#4724)

Approved by: @aressu1985
---
 test/cases/comment/comment.sql     | 110 +++++++++++++++++++++++++++++
 test/result/comment/comment.result |  90 +++++++++++++++++++++++
 2 files changed, 200 insertions(+)
 create mode 100644 test/cases/comment/comment.sql
 create mode 100644 test/result/comment/comment.result

diff --git a/test/cases/comment/comment.sql b/test/cases/comment/comment.sql
new file mode 100644
index 000000000..617e64989
--- /dev/null
+++ b/test/cases/comment/comment.sql
@@ -0,0 +1,110 @@
+-- test create table
+drop table if exists t1;
+create table t1(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+
+-- @bvt:issue#4720
+show create table t1;
+-- @bvt:issue
+drop table t1;
+
+drop table if exists t2;
+-- echo Comment for field 'col3' is too long (max = 1024)
+create table t2(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+
+-- @bvt:issue#4720
+show create table t2;
+-- @bvt:issue
+drop table t2;
+
+drop table if exists t3;
+create table t3(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '杩欐槸涓€涓猼3琛�';
+
+-- @bvt:issue#4720
+show create table t3;
+-- @bvt:issue
+drop table t3;
+
+
+drop table if exists t4;
+create table t4(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '杩欐槸涓€涓猼4琛�';
+
+-- @bvt:issue#4720
+show create table t4;
+-- @bvt:issue
+drop table t4;
+
+
+drop table if exists t5;
+create table t5(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+
+-- @bvt:issue#4720
+show create table t5;
+-- @bvt:issue
+drop table t5;
+
+drop table if exists t6;
+create table t6(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+
+-- @bvt:issue#4720
+show create table t6;
+-- @bvt:issue
+drop table t6;
+
+
+drop table if exists t7;
+-- Comment for table 't7' is too long (max = 2048)
+create table t7(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+
+-- @bvt:issue#4720
+show create table t7;
+-- @bvt:issue
+drop table t7;
+
+
+drop table if exists t8;
+create table t8(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!\'',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+
+-- @bvt:issue#4720
+show create table t8;
+-- @bvt:issue
+drop table t8;
diff --git a/test/result/comment/comment.result b/test/result/comment/comment.result
new file mode 100644
index 000000000..0e70d7bdd
--- /dev/null
+++ b/test/result/comment/comment.result
@@ -0,0 +1,90 @@
+drop table if exists t1;
+create table t1(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+show create table t1;
+Table    Create Table
+t1    CREATE TABLE `t1` (\n`col1` INT DEFAULT NULL COMMENT '杩欐槸绗竴鍒�',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n)
+drop table t1;
+drop table if exists t2;
+create table t2(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+Comment for field 'col3' is too long (max = 1024)
+show create table t2;
+table 't2' doesn't exist
+drop table t2;
+table t2 is not exists
+drop table if exists t3;
+create table t3(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '杩欐槸涓€涓猼3琛�';
+show create table t3;
+Table    Create Table
+t3    CREATE TABLE `t3` (\n`col1` INT DEFAULT NULL COMMENT '"杩欐槸绗竴鍒�"/',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!"',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n) COMMENT='杩欐槸涓€涓猼3琛�',
+drop table t3;
+drop table if exists t4;
+create table t4(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '杩欐槸涓€涓猼4琛�';
+show create table t4;
+Table    Create Table
+t4    CREATE TABLE `t4` (\n`col1` INT DEFAULT NULL COMMENT '"杩欐槸绗竴鍒�"/',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!"',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n) COMMENT='杩欐槸涓€涓猼4琛�',
+drop table t4;
+drop table if exists t5;
+create table t5(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+show create table t5;
+Table    Create Table
+t5    CREATE TABLE `t5` (\n`col1` INT DEFAULT NULL COMMENT '"杩欐槸绗竴鍒�"/',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!"',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n) COMMENT='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',
+drop table t5;
+drop table if exists t6;
+create table t6(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+show create table t6;
+Table    Create Table
+t6    CREATE TABLE `t6` (\n`col1` INT DEFAULT NULL COMMENT '"杩欐槸绗竴鍒�"/',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!"',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n) COMMENT='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',
+drop table t6;
+drop table if exists t7;
+create table t7(
+col1 int comment '"杩欐槸绗竴鍒�"/',
+col2 float comment '"%$^&*()_+@!"',
+col3 varchar comment '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',
+col4 bool comment ''
+) comment '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';
+Comment for table 't7' is too long (max = 2048)
+show create table t7;
+table 't7' doesn't exist
+drop table t7;
+table t7 is not exists
+drop table if exists t8;
+create table t8(
+col1 int comment '杩欐槸绗竴鍒�',
+col2 float comment '"%$^&*()_+@!\'',
+col3 varchar comment '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',
+col4 bool comment ''
+);
+show create table t8;
+Table    Create Table
+t8    CREATE TABLE `t8` (\n`col1` INT DEFAULT NULL COMMENT '杩欐槸绗竴鍒�',\n`col2` FLOAT DEFAULT NULL COMMENT '"%$^&*()_+@!'',\n`col3` VARCHAR(1) DEFAULT NULL COMMENT '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',\n`col4` BOOL DEFAULT NULL\n)
+drop table t8;
\ No newline at end of file
-- 
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