/
TableCatalog.java
180 lines (164 loc) · 6.87 KB
/
TableCatalog.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.connector.catalog;
import org.apache.spark.annotation.Experimental;
import org.apache.spark.sql.connector.expressions.Transform;
import org.apache.spark.sql.catalyst.analysis.NoSuchNamespaceException;
import org.apache.spark.sql.catalyst.analysis.NoSuchTableException;
import org.apache.spark.sql.catalyst.analysis.TableAlreadyExistsException;
import org.apache.spark.sql.types.StructType;
import java.util.Map;
/**
* Catalog methods for working with Tables.
* <p>
* TableCatalog implementations may be case sensitive or case insensitive. Spark will pass
* {@link Identifier table identifiers} without modification. Field names passed to
* {@link #alterTable(Identifier, TableChange...)} will be normalized to match the case used in the
* table schema when updating, renaming, or dropping existing columns when catalyst analysis is case
* insensitive.
*/
@Experimental
public interface TableCatalog extends CatalogPlugin {
/**
* A reserved property to specify the location of the table. The files of the table
* should be under this location.
*/
String PROP_LOCATION = "location";
/**
* A reserved property to specify the description of the table.
*/
String PROP_COMMENT = "comment";
/**
* A reserved property to specify the provider of the table.
*/
String PROP_PROVIDER = "provider";
/**
* A reserved property to specify the owner of the table.
*/
String PROP_OWNER = "owner";
/**
* List the tables in a namespace from the catalog.
* <p>
* If the catalog supports views, this must return identifiers for only tables and not views.
*
* @param namespace a multi-part namespace
* @return an array of Identifiers for tables
* @throws NoSuchNamespaceException If the namespace does not exist (optional).
*/
Identifier[] listTables(String[] namespace) throws NoSuchNamespaceException;
/**
* Load table metadata by {@link Identifier identifier} from the catalog.
* <p>
* If the catalog supports views and contains a view for the identifier and not a table, this
* must throw {@link NoSuchTableException}.
*
* @param ident a table identifier
* @return the table's metadata
* @throws NoSuchTableException If the table doesn't exist or is a view
*/
Table loadTable(Identifier ident) throws NoSuchTableException;
/**
* Invalidate cached table metadata for an {@link Identifier identifier}.
* <p>
* If the table is already loaded or cached, drop cached data. If the table does not exist or is
* not cached, do nothing. Calling this method should not query remote services.
*
* @param ident a table identifier
*/
default void invalidateTable(Identifier ident) {
}
/**
* Test whether a table exists using an {@link Identifier identifier} from the catalog.
* <p>
* If the catalog supports views and contains a view for the identifier and not a table, this
* must return false.
*
* @param ident a table identifier
* @return true if the table exists, false otherwise
*/
default boolean tableExists(Identifier ident) {
try {
return loadTable(ident) != null;
} catch (NoSuchTableException e) {
return false;
}
}
/**
* Create a table in the catalog.
*
* @param ident a table identifier
* @param schema the schema of the new table, as a struct type
* @param partitions transforms to use for partitioning data in the table
* @param properties a string map of table properties
* @return metadata for the new table
* @throws TableAlreadyExistsException If a table or view already exists for the identifier
* @throws UnsupportedOperationException If a requested partition transform is not supported
* @throws NoSuchNamespaceException If the identifier namespace does not exist (optional)
*/
Table createTable(
Identifier ident,
StructType schema,
Transform[] partitions,
Map<String, String> properties) throws TableAlreadyExistsException, NoSuchNamespaceException;
/**
* Apply a set of {@link TableChange changes} to a table in the catalog.
* <p>
* Implementations may reject the requested changes. If any change is rejected, none of the
* changes should be applied to the table.
* <p>
* If the catalog supports views and contains a view for the identifier and not a table, this
* must throw {@link NoSuchTableException}.
*
* @param ident a table identifier
* @param changes changes to apply to the table
* @return updated metadata for the table
* @throws NoSuchTableException If the table doesn't exist or is a view
* @throws IllegalArgumentException If any change is rejected by the implementation.
*/
Table alterTable(
Identifier ident,
TableChange... changes) throws NoSuchTableException;
/**
* Drop a table in the catalog.
* <p>
* If the catalog supports views and contains a view for the identifier and not a table, this
* must not drop the view and must return false.
*
* @param ident a table identifier
* @return true if a table was deleted, false if no table exists for the identifier
*/
boolean dropTable(Identifier ident);
/**
* Renames a table in the catalog.
* <p>
* If the catalog supports views and contains a view for the old identifier and not a table, this
* throws {@link NoSuchTableException}. Additionally, if the new identifier is a table or a view,
* this throws {@link TableAlreadyExistsException}.
* <p>
* If the catalog does not support table renames between namespaces, it throws
* {@link UnsupportedOperationException}.
*
* @param oldIdent the table identifier of the existing table to rename
* @param newIdent the new table identifier of the table
* @throws NoSuchTableException If the table to rename doesn't exist or is a view
* @throws TableAlreadyExistsException If the new table name already exists or is a view
* @throws UnsupportedOperationException If the namespaces of old and new identiers do not
* match (optional)
*/
void renameTable(Identifier oldIdent, Identifier newIdent)
throws NoSuchTableException, TableAlreadyExistsException;
}