51 lines
1.3 KiB
Plaintext
51 lines
1.3 KiB
Plaintext
CREATE OR REPLACE FUNCTION parse_int(val) AS (
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regexp_extract('decimal(12,3)', '[0-9]+')::INTEGER
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);
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# DECIMAL(p, s):
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CREATE OR REPLACE FUNCTION d2w(p) AS (
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if( p <= 4, 16,
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if( p <= 9, 32,
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if( p <= 18, 64,
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128) ))
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);
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CREATE OR REPLACE FUNCTION nominal_size_in_bits(val) AS (
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CASE typeof(val)
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WHEN 'TINYINT' THEN 8
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WHEN 'SMALLINT' THEN 16
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WHEN 'INTEGER' THEN 32
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WHEN 'BIGINT' THEN 64
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WHEN 'HUGEINT' THEN 128
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WHEN 'UTINYINT' THEN 8
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WHEN 'USMALLINT' THEN 16
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WHEN 'UINTEGER' THEN 32
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WHEN 'UBIGINT' THEN 64
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WHEN 'UHUGEINT' THEN 128
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WHEN 'JSON' THEN 8 * length(val::JSON::VARCHAR)
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WHEN 'UUID' THEN 128
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WHEN 'FLOAT' THEN 32
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WHEN 'DOUBLE' THEN 64
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WHEN 'BOOLEAN' THEN 8
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WHEN 'BIT' THEN (CEIL(LENGTH(val::VARCHAR) / 8.0) * 8)::INTEGER
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WHEN 'BLOB' THEN octet_length(val::BLOB) * 8
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ELSE CASE
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WHEN typeof(val) LIKE 'DECIMAL%'
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THEN d2w( regexp_extract(typeof(val), '[0-9]+')::INTEGER )
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WHEN typeof(val) LIKE 'VARCHAR%'
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THEN 8 * octet_length(encode(val::VARCHAR))
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ELSE NULL
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END
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END
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);
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# Example:
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select nominal_size_in_bits('1'::BIT) as "1::BIT",
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nominal_size_in_bits(bitstring('1',7)) as "0000001",
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nominal_size_in_bits(9.4) as "9.4",
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nominal_size_in_bits('👨') as "glyph";
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