Uncompressed character data in Vantage requires one byte per character when storing Latin character data. LZCOMP_L compresses Latin character input using the Lempel-Ziv algorithm, and returns the compressed result.
LZCOMP_L provides good compression results for long Latin character strings and medium strings with multiple repeating characters, but may be less effective for short strings.
Although you can call the function directly, LZCOMP_L is typically used with algorithmic compression (ALC) to compress table columns. If LZCOMP_L is used with ALC, nulls are also compressed if those columns are nullable.