程序包 org.dromara.autotable.core.strategy.pgsql.mapper

接口 PgsqlTablesMapper

public interface PgsqlTablesMapper

创建更新表结构的Mapper

作者:

don

方法概要

修饰符和类型	方法	说明
PgsqlDbPrimary	selectPrimaryKeyName(String schema, String tableName)	查询表下的主键信息
String	selectTableDescription(String schema, String tableName)	查询表名注释
List<PgsqlDbColumn>	selectTableFieldDetail(String schema, String tableName)	查询所有字段信息
List<PgsqlDbIndex>	selectTableIndexesDetail(String schema, String tableName)	查询所有索引信息

方法详细资料

selectTableDescription

@Select("SELECT des.description FROM pg_catalog.pg_description des LEFT JOIN pg_catalog.pg_class clas ON des.objoid = clas.oid LEFT JOIN pg_catalog.pg_namespace nams ON clas.relnamespace = nams.oid WHERE nams.nspname = #{schema} AND clas.relname = #{tableName} AND des.objsubid = 0;")
String selectTableDescription(String schema,
 String tableName)

查询表名注释

参数:

schema - schema

tableName - 表名

返回:

表注释

selectTableFieldDetail

@Result(column="primary",property="primary") @Result(column="description",property="description") @Result(column="table_catalog",property="tableCatalog") @Result(column="table_schema",property="tableSchema") @Result(column="table_name",property="tableName") @Result(column="column_name",property="columnName") @Result(column="ordinal_position",property="ordinalPosition") @Result(column="column_default",property="columnDefault") @Result(column="is_nullable",property="isNullable") @Result(column="data_type",property="dataType") @Result(column="character_maximum_length",property="characterMaximumLength") @Result(column="character_octet_length",property="characterOctetLength") @Result(column="numeric_precision",property="numericPrecision") @Result(column="numeric_precision_radix",property="numericPrecisionRadix") @Result(column="numeric_scale",property="numericScale") @Result(column="datetime_precision",property="datetimePrecision") @Result(column="interval_type",property="intervalType") @Result(column="interval_precision",property="intervalPrecision") @Result(column="character_set_catalog",property="characterSetCatalog") @Result(column="character_set_schema",property="characterSetSchema") @Result(column="character_set_name",property="characterSetName") @Result(column="collation_catalog",property="collationCatalog") @Result(column="collation_schema",property="collationSchema") @Result(column="collation_name",property="collationName") @Result(column="domain_catalog",property="domainCatalog") @Result(column="domain_schema",property="domainSchema") @Result(column="domain_name",property="domainName") @Result(column="udt_catalog",property="udtCatalog") @Result(column="udt_schema",property="udtSchema") @Result(column="udt_name",property="udtName") @Result(column="scope_catalog",property="scopeCatalog") @Result(column="scope_schema",property="scopeSchema") @Result(column="scope_name",property="scopeName") @Result(column="maximum_cardinality",property="maximumCardinality") @Result(column="dtd_identifier",property="dtdIdentifier") @Result(column="is_self_referencing",property="isSelfReferencing") @Result(column="is_identity",property="isIdentity") @Result(column="identity_generation",property="identityGeneration") @Result(column="identity_start",property="identityStart") @Result(column="identity_increment",property="identityIncrement") @Result(column="identity_maximum",property="identityMaximum") @Result(column="identity_minimum",property="identityMinimum") @Result(column="identity_cycle",property="identityCycle") @Result(column="is_generated",property="isGenerated") @Result(column="generation_expression",property="generationExpression") @Result(column="is_updatable",property="isUpdatable")
@Select("SELECT DISTINCT key_col.column_name IS NOT NULL AS primary, des.description, cols.* FROM information_schema.columns cols LEFT JOIN information_schema.key_column_usage key_col ON key_col.column_name = cols.column_name LEFT JOIN pg_catalog.pg_class clas ON clas.relname = cols.table_name AND clas.relnamespace = ( SELECT oid FROM pg_namespace WHERE nspname = cols.table_schema ) LEFT JOIN pg_catalog.pg_description des ON des.objoid = clas.oid AND cols.ordinal_position = des.objsubid WHERE cols.table_schema = #{schema} AND cols.table_name = #{tableName};")
List<PgsqlDbColumn> selectTableFieldDetail(String schema,
 String tableName)

查询所有字段信息

参数:

tableName - 表名

返回:

字段信息

selectTableIndexesDetail

@Result(column="description",property="description") @Result(column="schemaname",property="schemaName") @Result(column="tablename",property="tableName") @Result(column="indexname",property="indexName") @Result(column="tablespace",property="tablespace") @Result(column="indexdef",property="indexdef")
@Select("SELECT DISTINCT des.description, idxs.* FROM pg_catalog.pg_indexes idxs LEFT JOIN pg_catalog.pg_class clas ON idxs.indexname = clas.relname LEFT JOIN pg_catalog.pg_description des ON clas.oid = des.objoid LEFT JOIN pg_catalog.pg_constraint cst ON idxs.indexname = cst.conname WHERE idxs.schemaname = #{schema} AND idxs.tablename = #{tableName} AND cst.contype is null;")
List<PgsqlDbIndex> selectTableIndexesDetail(String schema,
 String tableName)

查询所有索引信息

关于pg_constraint表的contype值有以下几种：

主键约束（PRIMARY KEY）：contype 字段的值为 'p'

唯一约束（UNIQUE）：contype 字段的值为 'u'

检查约束（CHECK）：contype 字段的值为 'c'

外键约束（FOREIGN KEY）：contype 字段的值为 'f'

排他约束（EXCLUDE）：contype 字段的值为 'x'

参数:

tableName - 表名

返回:

索引信息

selectPrimaryKeyName

@Result(column="primary_name",property="primaryName") @Result(column="columns",property="columns")
@Select("SELECT key_col.constraint_name as primary_name, string_agg(key_col.column_name, \',\' ORDER BY key_col.ordinal_position ASC) as columns FROM information_schema.key_column_usage key_col WHERE key_col.table_schema = #{schema} AND key_col.table_name = #{tableName} GROUP BY key_col.constraint_name;")
PgsqlDbPrimary selectPrimaryKeyName(String schema,
 String tableName)

查询表下的主键信息

参数:

tableName - 表明

返回:

主键名