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https://github.com/MariaDB/server.git
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91 lines
2.3 KiB
Text
91 lines
2.3 KiB
Text
set @v1a="Hello";
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set @v2a="World";
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set @v3a=65;
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set @v4a=NULL;
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select @v1a, @v2a, @v3a, @v4a, @v_unknown;
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@v1a @v2a @v3a @v4a @v_unknown
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Hello World 65 NULL NULL
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select VARIABLE_NAME, VARIABLE_VALUE
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from performance_schema.user_variables_by_thread
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order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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v1a Hello
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v2a World
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v3a 65
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v4a NULL
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connect con1, localhost, root,,;
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set @v1b="Salut";
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set @v2b="La compagnie";
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set @v3b=12;
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set @v4b=NULL;
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select @v1b, @v2b, @v3b, @v4b, @v_unknown;
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@v1b @v2b @v3b @v4b @v_unknown
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Salut La compagnie 12 NULL NULL
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select VARIABLE_NAME, VARIABLE_VALUE
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from performance_schema.user_variables_by_thread
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order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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v1a Hello
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v1b Salut
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v2a World
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v2b La compagnie
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v3a 65
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v3b 12
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v4a NULL
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v4b NULL
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connection default;
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disconnect con1;
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select VARIABLE_NAME, VARIABLE_VALUE
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from performance_schema.user_variables_by_thread
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order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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v1a Hello
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v2a World
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v3a 65
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v4a NULL
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set @blob_under_16_bits=repeat("a", 65000);
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set @blob_under_24_bits=repeat("a", 1000000);
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select length(@blob_under_16_bits);
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length(@blob_under_16_bits)
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65000
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select length(@blob_under_24_bits);
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length(@blob_under_24_bits)
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1000000
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select variable_name, length(variable_value)
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from performance_schema.user_variables_by_thread
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where VARIABLE_NAME like "blob%"
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order by VARIABLE_NAME;
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variable_name length(variable_value)
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blob_under_16_bits 65000
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blob_under_24_bits 1000000
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set @a=10;
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CREATE procedure test_user_val
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(IN input INT,OUT output INT)
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BEGIN
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SELECT input + input
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INTO output;
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END|
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CALL test_user_val(@a , @total);
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select VARIABLE_NAME,VARIABLE_VALUE from performance_schema.user_variables_by_thread
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where variable_name in ('a','total') order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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a 10
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total 20
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create table t1 (c1 int);
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CREATE TRIGGER test_uvar_trigger
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AFTER INSERT ON t1
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FOR EACH ROW BEGIN
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set @a=@a+@a;
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END|
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insert into t1 values(1);
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select VARIABLE_NAME,VARIABLE_VALUE from performance_schema.user_variables_by_thread
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where variable_name ='a' order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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a 20
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insert into t1 values(1);
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select VARIABLE_NAME,VARIABLE_VALUE from performance_schema.user_variables_by_thread
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where variable_name ='a' order by VARIABLE_NAME;
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VARIABLE_NAME VARIABLE_VALUE
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a 40
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drop table t1;
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drop procedure test_user_val;
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