dbin0123
100 lines
2.5 KiB
YAML
100 lines
2.5 KiB
YAML
dialect:
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name: "Databend"
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display_name: "Databend"
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versions:
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- version: "1"
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status: "RECOMMENDED"
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types:
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- name: "TINYINT"
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category: "INTEGER"
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- name: "SMALLINT"
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category: "INTEGER"
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- name: "INT"
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category: "INTEGER"
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- name: "BIGINT"
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category: "INTEGER"
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- name: "FLOAT"
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category: "FLOAT"
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- name: "DOUBLE"
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category: "FLOAT"
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- name: "DECIMAL"
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category: "DECIMAL"
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has_precision: true
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- name: "VARCHAR"
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category: "STRING"
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has_length: true
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- name: "STRING"
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category: "STRING"
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- name: "BOOLEAN"
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category: "BOOLEAN"
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- name: "DATE"
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category: "DATE"
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- name: "TIMESTAMP"
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category: "DATETIME"
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- name: "ARRAY"
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category: "ARRAY"
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semantic_fidelity_base: 0.5
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- name: "VARIANT"
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category: "JSON"
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- name: "MAP"
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category: "MAP"
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semantic_fidelity_base: 0.4
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- name: "BITMAP"
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category: "BITMAP"
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semantic_fidelity_base: 0.2
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ddl_capabilities:
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add_column: true
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drop_column: true
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rename_column: true
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alter_column_type: true
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create_table: true
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drop_table: true
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truncate_table: true
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if_not_exists: true
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templates:
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add_column: "ALTER TABLE {table} ADD COLUMN {column} {type}"
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drop_column: "ALTER TABLE {table} DROP COLUMN {column}"
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rename_column: "ALTER TABLE {table} RENAME COLUMN {old} TO {new}"
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modify_column: "ALTER TABLE {table} MODIFY COLUMN {column} TYPE {type}"
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create_table: "CREATE TABLE IF NOT EXISTS {table} ({columns})"
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drop_table: "DROP TABLE IF EXISTS {table}"
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rollback_templates:
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add_column: "ALTER TABLE {table} DROP COLUMN {column}"
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drop_column: "ALTER TABLE {table} ADD COLUMN {column} {original_type}"
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rename_column: "ALTER TABLE {table} RENAME COLUMN {new} TO {old}"
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online_safety:
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add_column:
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level: "NON_BLOCKING"
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cost: "LOW"
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destruction_level:
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drop_table: "FATAL"
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truncate: "DANGEROUS"
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structural_capabilities:
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supports_schemas: true
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max_columns_per_table: 4096
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max_query_size_bytes: 268435456
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supports_json_type: true
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identifier_rules:
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quote_char: "`"
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case_sensitive: false
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max_length: 256
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metadata_queries:
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list_tables:
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sql: "SELECT name FROM system.tables WHERE database = '{schema}'"
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performance_profile: "LIGHT"
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list_columns:
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sql: "SELECT name, type FROM system.columns WHERE database = '{schema}' AND table = '{table}'"
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performance_profile: "MEDIUM"
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dependencies:
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sql: "SELECT name FROM system.tables WHERE database = '{schema}'"
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depth_support: 0
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performance_profile: "LIGHT"
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