与三个表有关:
LOBS
LOB_DATA
LOB_MAP
LOBS:
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CREATE CACHED TABLE IF NOT EXISTS INFORMATION_SCHEMA.LOBS
(ID BIGINT PRIMARY KEY, BYTE_COUNT BIGINT, TABLE INT) HIDDEN
LOB_DATA:
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CREATE CACHED TABLE IF NOT EXISTS INFORMATION_SCHEMA.LOB_DATA
(BLOCK BIGINT PRIMARY KEY, COMPRESSED INT, DATA BINARY) HIDDEN
LOB_MAP:
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CREATE CACHED TABLE IF NOT EXISTS INFORMATION_SCHEMA.LOB_MAP
(LOB BIGINT, SEQ INT, POS BIGINT, HASH INT, BLOCK BIGINT, PRIMARY KEY(LOB, SEQ)) HIDDEN
LOBS表的ID字段和LOB_MAP的LOB字段对应，值一样(就是lobId)
另外还有两个索引:
在LOBS表上的索引: INDEX_LOB_TABLE
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CREATE INDEX IF NOT EXISTS INFORMATION_SCHEMA.INDEX_LOB_TABLE ON INFORMATION_SCHEMA.LOBS(TABLE)
在LOB_MAP表上的索引: INDEX_LOB_MAP_DATA_LOB
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CREATE INDEX IF NOT EXISTS INFORMATION_SCHEMA.INDEX_LOB_MAP_DATA_LOB ON INFORMATION_SCHEMA.LOB_MAP(BLOCK, LOB)
以上内容对应源代码见: org.h2.store.LobStorage.init()