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The following Oracle formats are supported: Truncate to day: DD, DDD,J Truncate to month: MM,MON,MONTH,RM Truncate to Year: SYEAR,SYYYY,Y,YEAR,YY,YYY,YYYY TRUNC(date) is same as TRUNC(date, "MM")
122 lines
3.9 KiB
Text
122 lines
3.9 KiB
Text
# Test for function trunc()
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#
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# Simple test
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#
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select trunc("2025-07-27 12:01:02.123");
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trunc("2025-07-27 12:01:02.123")
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2025-07-27
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select trunc("2025-07-27 12:01:02.123","YY");
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trunc("2025-07-27 12:01:02.123","YY")
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2025-01-01
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select trunc("2025-07-27 12:01:02.123","MM");
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trunc("2025-07-27 12:01:02.123","MM")
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2025-07-01
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select trunc("2025-07-27 12:01:02.123","DD");
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trunc("2025-07-27 12:01:02.123","DD")
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2025-07-27
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select trunc("hello");
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trunc("hello")
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NULL
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Warnings:
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Warning 1292 Incorrect datetime value: 'hello'
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select trunc(1);
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trunc(1)
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NULL
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Warnings:
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Warning 1292 Incorrect datetime value: '1'
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# Ensure that trunc table name and column can still be used
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create table trunc (trunc int);
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insert into trunc (trunc) values (1);
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select trunc from trunc;
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trunc
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1
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drop table trunc;
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#
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# Test all format variations
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#
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CREATE TABLE t1(c2 datetime, c3 date, c4 timestamp);
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INSERT INTO t1 VALUES ('2021-11-12 00:23:12', '2021-11-12', '2021-11-12 00:23:12');
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INSERT INTO t1 VALUES ('0000-09-02 00:00:00', '0000-09-02', '1980-09-02 00:00:00');
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INSERT INTO t1 VALUES ('9999-09-02', '9999-09-02', '1980-09-02');
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create table t2 (format varchar(5)) engine=aria;
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insert into t2 values ("DD"),("DDD"),("J"),("MM"),("MON"),("MONTH"),("RM"),("SYEAR"),("SYYYY"),("Y"),("YEAR"),("YY"),("YYY"),("YYYY"), ("ZZZ");
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SELECT format,trunc(c2,format),trunc(c3,format),trunc(c4,format) from t2 straight_join t1;
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format trunc(c2,format) trunc(c3,format) trunc(c4,format)
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DD 2021-11-12 2021-11-12 2021-11-12
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DDD 2021-11-12 2021-11-12 2021-11-12
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J 2021-11-12 2021-11-12 2021-11-12
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MM 2021-11-01 2021-11-01 2021-11-01
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MON 2021-11-01 2021-11-01 2021-11-01
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MONTH 2021-11-01 2021-11-01 2021-11-01
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RM 2021-11-01 2021-11-01 2021-11-01
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SYEAR 2021-01-01 2021-01-01 2021-01-01
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SYYYY 2021-01-01 2021-01-01 2021-01-01
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Y 2021-01-01 2021-01-01 2021-01-01
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YEAR 2021-01-01 2021-01-01 2021-01-01
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YY 2021-01-01 2021-01-01 2021-01-01
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YYY 2021-01-01 2021-01-01 2021-01-01
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YYYY 2021-01-01 2021-01-01 2021-01-01
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ZZZ NULL NULL NULL
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DD 0000-09-02 0000-09-02 1980-09-02
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DDD 0000-09-02 0000-09-02 1980-09-02
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J 0000-09-02 0000-09-02 1980-09-02
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MM 0000-09-01 0000-09-01 1980-09-01
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MON 0000-09-01 0000-09-01 1980-09-01
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MONTH 0000-09-01 0000-09-01 1980-09-01
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RM 0000-09-01 0000-09-01 1980-09-01
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SYEAR 0000-01-01 0000-01-01 1980-01-01
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SYYYY 0000-01-01 0000-01-01 1980-01-01
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Y 0000-01-01 0000-01-01 1980-01-01
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YEAR 0000-01-01 0000-01-01 1980-01-01
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YY 0000-01-01 0000-01-01 1980-01-01
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YYY 0000-01-01 0000-01-01 1980-01-01
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YYYY 0000-01-01 0000-01-01 1980-01-01
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ZZZ NULL NULL NULL
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DD 9999-09-02 9999-09-02 1980-09-02
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DDD 9999-09-02 9999-09-02 1980-09-02
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J 9999-09-02 9999-09-02 1980-09-02
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MM 9999-09-01 9999-09-01 1980-09-01
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MON 9999-09-01 9999-09-01 1980-09-01
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MONTH 9999-09-01 9999-09-01 1980-09-01
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RM 9999-09-01 9999-09-01 1980-09-01
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SYEAR 9999-01-01 9999-01-01 1980-01-01
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SYYYY 9999-01-01 9999-01-01 1980-01-01
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Y 9999-01-01 9999-01-01 1980-01-01
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YEAR 9999-01-01 9999-01-01 1980-01-01
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YY 9999-01-01 9999-01-01 1980-01-01
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YYY 9999-01-01 9999-01-01 1980-01-01
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YYYY 9999-01-01 9999-01-01 1980-01-01
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ZZZ NULL NULL NULL
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Warnings:
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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Warning 1292 Incorrect TRUNC value: 'ZZZ'
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#
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# Test wrong usage
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#
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select trunc('2021-11-12 00:23:12',"");
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trunc('2021-11-12 00:23:12',"")
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NULL
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Warnings:
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Warning 1292 Incorrect TRUNC value: ''
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select trunc("","DD");
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trunc("","DD")
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NULL
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Warnings:
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Warning 1292 Incorrect datetime value: ''
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select trunc();
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ERROR 42000: Incorrect parameter count in the call to native function 'trunc'
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select trunc(1);
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trunc(1)
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NULL
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Warnings:
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Warning 1292 Incorrect datetime value: '1'
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select trunc(1,2,3);
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ERROR 42000: Incorrect parameter count in the call to native function 'trunc'
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drop table t1,t2;
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