Updated on 2023-10-23 GMT+08:00

MY_TAB_COLUMNS

MY_TAB_COLUMNS displays information about table columns accessible to the current user. This view exists in both PG_CATALOG and SYS schema.

Table 1 MY_TAB_COLUMNS columns

Name

Type

Description

owner

character varying(64)

Table owner

table_name

character varying(64)

Table name

column_name

character varying(64)

Column name

data_type

character varying(128)

Data type of a column

data_length

integer

Length of a column, in bytes

data_precision

integer

Precision of a data type. This parameter is valid for the numeric data type and NULL for other data types.

data_scale

integer

Number of decimal places. This parameter is valid for the numeric data type and is set to 0 for other data types.

nullable

bpchar

Whether a column can be empty (n for the primary key constraint and non-null constraint)

column_id

integer

Sequence number of a column when a table is created

avg_col_len

numeric

Average length of a column, in bytes

char_length

numeric

Length of a column, in characters. This parameter is valid only for the varchar, nvarchar2, bpchar, and char types.

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